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[TCWG CI] Regression caused by gcc: Add -Wdangling-pointer [PR63272].

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[TCWG CI] Regression caused by gcc: Add -Wdangling-pointer [PR63272].: commit 9d6a0f388eb048f8d87f47af78f07b5ce513bfe6 Author: Martin Sebor <msebor(a)redhat.com> Add -Wdangling-pointer [PR63272]. Results regressed to # reset_artifacts: -10 # build_abe binutils: -9 # build_abe stage1: -5 # build_abe qemu: -2 # linux_n_obj: 21324 # First few build errors in logs: # 00:03:31 sound/core/oss/mixer_oss.c:1057:21: error: ‘slot’ is used uninitialized [-Werror=uninitialized] # 00:03:32 sound/core/oss/pcm_oss.c:108:29: error: ‘t’ is used uninitialized [-Werror=uninitialized] # 00:03:32 sound/core/oss/pcm_oss.c:2488:34: error: ‘setup’ is used uninitialized [-Werror=uninitialized] # 00:03:32 sound/core/oss/pcm_oss.c:2998:51: error: ‘template’ is used uninitialized [-Werror=uninitialized] # 00:03:35 make[3]: *** [scripts/Makefile.build:277: sound/core/oss/mixer_oss.o] Error 1 # 00:03:35 sound/core/seq/oss/seq_oss_init.c:350:35: error: ‘qinfo’ is used uninitialized [-Werror=uninitialized] # 00:03:35 sound/core/seq/oss/seq_oss_init.c:370:35: error: ‘qinfo’ is used uninitialized [-Werror=uninitialized] # 00:03:36 make[4]: *** [scripts/Makefile.build:277: sound/core/seq/oss/seq_oss_init.o] Error 1 # 00:03:40 make[3]: *** [scripts/Makefile.build:277: sound/core/oss/pcm_oss.o] Error 1 # 00:03:50 make[3]: *** [scripts/Makefile.build:540: sound/core/seq/oss] Error 2 from # reset_artifacts: -10 # build_abe binutils: -9 # build_abe stage1: -5 # build_abe qemu: -2 # linux_n_obj: 21354 THIS IS THE END OF INTERESTING STUFF. BELOW ARE LINKS TO BUILDS, REPRODUCTION INSTRUCTIONS, AND THE RAW COMMIT. This commit has regressed these CI configurations: - tcwg_kernel/gnu-master-aarch64-stable-allmodconfig First_bad build: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-aarch64-stable-… Last_good build: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-aarch64-stable-… Baseline build: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-aarch64-stable-… Even more details: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-aarch64-stable-… Reproduce builds: <cut> mkdir investigate-gcc-9d6a0f388eb048f8d87f47af78f07b5ce513bfe6 cd investigate-gcc-9d6a0f388eb048f8d87f47af78f07b5ce513bfe6 # Fetch scripts git clone https://git.linaro.org/toolchain/jenkins-scripts # Fetch manifests and test.sh script mkdir -p artifacts/manifests curl -o artifacts/manifests/build-baseline.sh https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-aarch64-stable-… --fail curl -o artifacts/manifests/build-parameters.sh https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-aarch64-stable-… --fail curl -o artifacts/test.sh https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-aarch64-stable-… --fail chmod +x artifacts/test.sh # Reproduce the baseline build (build all pre-requisites) ./jenkins-scripts/tcwg_kernel-build.sh @@ artifacts/manifests/build-baseline.sh # Save baseline build state (which is then restored in artifacts/test.sh) mkdir -p ./bisect rsync -a --del --delete-excluded --exclude /bisect/ --exclude /artifacts/ --exclude /gcc/ ./ ./bisect/baseline/ cd gcc # Reproduce first_bad build git checkout --detach 9d6a0f388eb048f8d87f47af78f07b5ce513bfe6 ../artifacts/test.sh # Reproduce last_good build git checkout --detach 671a283636de75f7ed638ee6b01ed2d44361b8b6 ../artifacts/test.sh cd .. </cut> Full commit (up to 1000 lines): <cut> commit 9d6a0f388eb048f8d87f47af78f07b5ce513bfe6 Author: Martin Sebor <msebor(a)redhat.com> Date: Sat Jan 15 16:41:40 2022 -0700 Add -Wdangling-pointer [PR63272]. Resolves: PR c/63272 - GCC should warn when using pointer to dead scoped variable with in the same function gcc/c-family/ChangeLog: PR c/63272 * c.opt (-Wdangling-pointer): New option. gcc/ChangeLog: PR c/63272 * diagnostic-spec.c (nowarn_spec_t::nowarn_spec_t): Handle -Wdangling-pointer. * doc/invoke.texi (-Wdangling-pointer): Document new option. * gimple-ssa-warn-access.cc (pass_waccess::clone): Set new member. (pass_waccess::check_pointer_uses): New function. (pass_waccess::gimple_call_return_arg): New function. (pass_waccess::gimple_call_return_arg_ref): New function. (pass_waccess::check_call_dangling): New function. (pass_waccess::check_dangling_uses): New function overloads. (pass_waccess::check_dangling_stores): New function. (pass_waccess::check_dangling_stores): New function. (pass_waccess::m_clobbers): New data member. (pass_waccess::m_func): New data member. (pass_waccess::m_run_number): New data member. (pass_waccess::m_check_dangling_p): New data member. (pass_waccess::check_alloca): Check m_early_checks_p. (pass_waccess::check_alloc_size_call): Same. (pass_waccess::check_strcat): Same. (pass_waccess::check_strncat): Same. (pass_waccess::check_stxcpy): Same. (pass_waccess::check_stxncpy): Same. (pass_waccess::check_strncmp): Same. (pass_waccess::check_memop_access): Same. (pass_waccess::check_read_access): Same. (pass_waccess::check_builtin): Call check_pointer_uses. (pass_waccess::warn_invalid_pointer): Add arguments. (is_auto_decl): New function. (pass_waccess::check_stmt): New function. (pass_waccess::check_block): Call check_stmt. (pass_waccess::execute): Call check_dangling_uses, check_dangling_stores. Empty m_clobbers. * passes.def (pass_warn_access): Invoke pass two more times. gcc/testsuite/ChangeLog: PR c/63272 * g++.dg/warn/Wfree-nonheap-object-6.C: Disable valid warnings. * g++.dg/warn/ref-temp1.C: Prune expected warning. * gcc.dg/uninit-pr50476.c: Expect a new warning. * c-c++-common/Wdangling-pointer-2.c: New test. * c-c++-common/Wdangling-pointer-3.c: New test. * c-c++-common/Wdangling-pointer-4.c: New test. * c-c++-common/Wdangling-pointer-5.c: New test. * c-c++-common/Wdangling-pointer-6.c: New test. * c-c++-common/Wdangling-pointer.c: New test. * g++.dg/warn/Wdangling-pointer-2.C: New test. * g++.dg/warn/Wdangling-pointer.C: New test. * gcc.dg/Wdangling-pointer-2.c: New test. * gcc.dg/Wdangling-pointer.c: New test. --- gcc/c-family/c.opt | 8 + gcc/diagnostic-spec.c | 1 + gcc/doc/invoke.texi | 62 +- gcc/gimple-ssa-warn-access.cc | 635 +++++++++++++++++++-- gcc/passes.def | 5 +- gcc/testsuite/c-c++-common/Wdangling-pointer-2.c | 437 ++++++++++++++ gcc/testsuite/c-c++-common/Wdangling-pointer-3.c | 64 +++ gcc/testsuite/c-c++-common/Wdangling-pointer-4.c | 73 +++ gcc/testsuite/c-c++-common/Wdangling-pointer-5.c | 90 +++ gcc/testsuite/c-c++-common/Wdangling-pointer-6.c | 32 ++ gcc/testsuite/c-c++-common/Wdangling-pointer.c | 434 ++++++++++++++ gcc/testsuite/g++.dg/warn/Wdangling-pointer-2.C | 23 + gcc/testsuite/g++.dg/warn/Wdangling-pointer.C | 74 +++ gcc/testsuite/g++.dg/warn/Wfree-nonheap-object-6.C | 4 +- gcc/testsuite/g++.dg/warn/ref-temp1.C | 3 + gcc/testsuite/gcc.dg/Wdangling-pointer-2.c | 82 +++ gcc/testsuite/gcc.dg/Wdangling-pointer.c | 75 +++ gcc/testsuite/gcc.dg/uninit-pr50476.c | 2 +- 18 files changed, 2043 insertions(+), 61 deletions(-) diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt index 28363643664..db65c14a7a5 100644 --- a/gcc/c-family/c.opt +++ b/gcc/c-family/c.opt @@ -548,6 +548,14 @@ Wdangling-else C ObjC C++ ObjC++ Var(warn_dangling_else) Warning LangEnabledBy(C ObjC C++ ObjC++,Wparentheses) Warn about dangling else. +Wdangling-pointer +C ObjC C++ LTO ObjC++ Alias(Wdangling-pointer=, 2, 0) Warning +Warn for uses of pointers to auto variables whose lifetime has ended. + +Wdangling-pointer= +C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_dangling_pointer) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall, 2, 0) IntegerRange(0, 2) +Warn for uses of pointers to auto variables whose lifetime has ended. + Wdate-time C ObjC C++ ObjC++ CPP(warn_date_time) CppReason(CPP_W_DATE_TIME) Var(cpp_warn_date_time) Init(0) Warning Warn about __TIME__, __DATE__ and __TIMESTAMP__ usage. diff --git a/gcc/diagnostic-spec.c b/gcc/diagnostic-spec.c index c9e1c1be91d..a8af229d677 100644 --- a/gcc/diagnostic-spec.c +++ b/gcc/diagnostic-spec.c @@ -99,6 +99,7 @@ nowarn_spec_t::nowarn_spec_t (opt_code opt) m_bits = NW_UNINIT; break; + case OPT_Wdangling_pointer_: case OPT_Wreturn_local_addr: case OPT_Wuse_after_free_: m_bits = NW_DANGLING; diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 121c8ea827f..7f2205e4a85 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -341,7 +341,8 @@ Objective-C and Objective-C++ Dialects}. -Wchar-subscripts @gol -Wclobbered -Wcomment @gol -Wconversion -Wno-coverage-mismatch -Wno-cpp @gol --Wdangling-else -Wdate-time @gol +-Wdangling-else -Wdangling-pointer -Wdangling-pointer=@var{n} @gol +-Wdate-time @gol -Wno-deprecated -Wno-deprecated-declarations -Wno-designated-init @gol -Wdisabled-optimization @gol -Wno-discarded-array-qualifiers -Wno-discarded-qualifiers @gol @@ -4389,6 +4390,8 @@ Warn about overriding virtual functions that are not marked with the @opindex Wno-use-after-free Warn about uses of pointers to dynamically allocated objects that have been rendered indeterminate by a call to a deallocation function. +The warning is enabled at all optimization levels but may yield different +results with optimization than without. @table @gcctabopt @item -Wuse-after-free=1 @@ -5714,6 +5717,7 @@ Options} and @ref{Objective-C and Objective-C++ Dialect Options}. -Wcatch-value @r{(C++ and Objective-C++ only)} @gol -Wchar-subscripts @gol -Wcomment @gol +-Wdangling-pointer=2 @gol -Wduplicate-decl-specifier @r{(C and Objective-C only)} @gol -Wenum-compare @r{(in C/ObjC; this is on by default in C++)} @gol -Wformat @gol @@ -8587,6 +8591,62 @@ looks like this: This warning is enabled by @option{-Wparentheses}. +@item -Wdangling-pointer +@itemx -Wdangling-pointer=@var{n} +@opindex Wdangling-pointer +@opindex Wno-dangling-pointer +Warn about uses of pointers (or C++ references) to objects with automatic +storage duration after their lifetime has ended. This includes local +variables declared in nested blocks, compound literals and other unnamed +temporary objects. In addition, warn about storing the address of such +objects in escaped pointers. The warning is enabled at all optimization +levels but may yield different results with optimization than without. + +@table @gcctabopt +@item -Wdangling-pointer=1 +At level 1 the warning diagnoses only unconditional uses of dangling pointers. +For example +@smallexample +int f (int c1, int c2, x) +@{ + char *p = strchr ((char[])@{ c1, c2 @}, c3); + return p ? *p : 'x'; // warning: dangling pointer to a compound literal +@} +@end smallexample +In the following function the store of the address of the local variable +@code{x} in the escaped pointer @code{*p} also triggers the warning. +@smallexample +void g (int **p) +@{ + int x = 7; + *p = &x; // warning: storing the address of a local variable in *p +@} +@end smallexample + +@item -Wdangling-pointer=2 +At level 2, in addition to unconditional uses the warning also diagnoses +conditional uses of dangling pointers. + +For example, because the array @var{a} in the following function is out of +scope when the pointer @var{s} that was set to point is used, the warning +triggers at this level. + +@smallexample +void f (char *s) +@{ + if (!s) + @{ + char a[12] = "tmpname"; + s = a; + @} + strcat (s, ".tmp"); // warning: dangling pointer to a may be used + ... +@} +@end smallexample +@end table + +@option{-Wdangling-pointer=2} is included in @option{-Wall}. + @item -Wdate-time @opindex Wdate-time @opindex Wno-date-time diff --git a/gcc/gimple-ssa-warn-access.cc b/gcc/gimple-ssa-warn-access.cc index 882129143a1..f639807a78a 100644 --- a/gcc/gimple-ssa-warn-access.cc +++ b/gcc/gimple-ssa-warn-access.cc @@ -2069,10 +2069,12 @@ class pass_waccess : public gimple_opt_pass ~pass_waccess (); - opt_pass *clone () { return new pass_waccess (m_ctxt); } + opt_pass *clone (); virtual bool gate (function *); + void set_pass_param (unsigned, bool); + virtual unsigned int execute (function *); private: @@ -2089,6 +2091,9 @@ private: /* Check a call to an ordinary function for invalid accesses. */ bool check_call_access (gcall *); + /* Check a non-call statement. */ + void check_stmt (gimple *); + /* Check statements in a basic block. */ void check_block (basic_block); @@ -2112,26 +2117,41 @@ private: void check_atomic_memmodel (gimple *, tree, tree, const unsigned char *); /* Check for uses of indeterminate pointers. */ - void check_pointer_uses (gimple *, tree); + void check_pointer_uses (gimple *, tree, tree = NULL_TREE, bool = false); /* Return the argument that a call returns. */ tree gimple_call_return_arg (gcall *); + tree gimple_call_return_arg_ref (gcall *); + + /* Check a call for uses of a dangling pointer arguments. */ + void check_call_dangling (gcall *); + + /* Check uses of a dangling pointer or those derived from it. */ + void check_dangling_uses (tree, tree, bool = false, bool = false); + void check_dangling_uses (); + void check_dangling_stores (); + void check_dangling_stores (basic_block, hash_set<tree> &, auto_bitmap &); - void warn_invalid_pointer (tree, gimple *, gimple *, bool, bool = false); + void warn_invalid_pointer (tree, gimple *, gimple *, tree, bool, bool = false); /* Return true if use follows an invalidating statement. */ - bool use_after_inval_p (gimple *, gimple *); + bool use_after_inval_p (gimple *, gimple *, bool = false); /* A pointer_query object and its cache to store information about pointers and their targets in. */ pointer_query m_ptr_qry; pointer_query::cache_type m_var_cache; - + /* Mapping from DECLs and their clobber statements in the function. */ + hash_map<tree, gimple *> m_clobbers; /* A bit is set for each basic block whose statements have been assigned valid UIDs. */ bitmap m_bb_uids_set; /* The current function. */ function *m_func; + /* True to run checks for uses of dangling pointers. */ + bool m_check_dangling_p; + /* True to run checks early on in the optimization pipeline. */ + bool m_early_checks_p; }; /* Construct the pass. */ @@ -2140,11 +2160,22 @@ pass_waccess::pass_waccess (gcc::context *ctxt) : gimple_opt_pass (pass_data_waccess, ctxt), m_ptr_qry (NULL, &m_var_cache), m_var_cache (), + m_clobbers (), m_bb_uids_set (), - m_func () + m_func (), + m_check_dangling_p (), + m_early_checks_p () { } +/* Return a copy of the pass with RUN_NUMBER one greater than THIS. */ + +opt_pass* +pass_waccess::clone () +{ + return new pass_waccess (m_ctxt); +} + /* Release pointer_query cache. */ pass_waccess::~pass_waccess () @@ -2152,6 +2183,14 @@ pass_waccess::~pass_waccess () m_ptr_qry.flush_cache (); } +void +pass_waccess::set_pass_param (unsigned int n, bool early) +{ + gcc_assert (n == 0); + + m_early_checks_p = early; +} + /* Return true when any checks performed by the pass are enabled. */ bool @@ -2340,6 +2379,9 @@ maybe_warn_alloc_args_overflow (gimple *stmt, const tree args[2], void pass_waccess::check_alloca (gcall *stmt) { + if (m_early_checks_p) + return; + if ((warn_vla_limit >= HOST_WIDE_INT_MAX && warn_alloc_size_limit < warn_vla_limit) || (warn_alloca_limit >= HOST_WIDE_INT_MAX @@ -2361,6 +2403,13 @@ pass_waccess::check_alloca (gcall *stmt) void pass_waccess::check_alloc_size_call (gcall *stmt) { + if (m_early_checks_p) + return; + + if (gimple_call_num_args (stmt) < 1) + /* Avoid invalid calls to functions without a prototype. */ + return; + tree fndecl = gimple_call_fndecl (stmt); if (fndecl && gimple_call_builtin_p (stmt, BUILT_IN_NORMAL)) { @@ -2413,6 +2462,9 @@ pass_waccess::check_alloc_size_call (gcall *stmt) void pass_waccess::check_strcat (gcall *stmt) { + if (m_early_checks_p) + return; + if (!warn_stringop_overflow && !warn_stringop_overread) return; @@ -2438,6 +2490,9 @@ pass_waccess::check_strcat (gcall *stmt) void pass_waccess::check_strncat (gcall *stmt) { + if (m_early_checks_p) + return; + if (!warn_stringop_overflow && !warn_stringop_overread) return; @@ -2507,6 +2562,9 @@ pass_waccess::check_strncat (gcall *stmt) void pass_waccess::check_stxcpy (gcall *stmt) { + if (m_early_checks_p) + return; + tree dst = call_arg (stmt, 0); tree src = call_arg (stmt, 1); @@ -2545,7 +2603,7 @@ pass_waccess::check_stxcpy (gcall *stmt) void pass_waccess::check_stxncpy (gcall *stmt) { - if (!warn_stringop_overflow) + if (m_early_checks_p || !warn_stringop_overflow) return; tree dst = call_arg (stmt, 0); @@ -2569,7 +2627,7 @@ pass_waccess::check_stxncpy (gcall *stmt) void pass_waccess::check_strncmp (gcall *stmt) { - if (!warn_stringop_overread) + if (m_early_checks_p || !warn_stringop_overread) return; tree arg1 = call_arg (stmt, 0); @@ -2674,6 +2732,9 @@ pass_waccess::check_strncmp (gcall *stmt) void pass_waccess::check_memop_access (gimple *stmt, tree dest, tree src, tree size) { + if (m_early_checks_p) + return; + /* For functions like memset and memcpy that operate on raw memory try to determine the size of the largest source and destination object using type-0 Object Size regardless of the object size @@ -2695,7 +2756,7 @@ pass_waccess::check_read_access (gimple *stmt, tree src, tree bound /* = NULL_TREE */, int ost /* = 1 */) { - if (!warn_stringop_overread) + if (m_early_checks_p || !warn_stringop_overread) return; if (bound && !useless_type_conversion_p (size_type_node, TREE_TYPE (bound))) @@ -2938,7 +2999,7 @@ pass_waccess::check_atomic_memmodel (gimple *stmt, tree ord_sucs, if (warning_suppressed_p (stmt, OPT_Winvalid_memory_model)) return; - if (maybe_warn_memmodel (stmt, ord_sucs, ord_fail, valid)) + if (!maybe_warn_memmodel (stmt, ord_sucs, ord_fail, valid)) return; suppress_warning (stmt, OPT_Winvalid_memory_model); @@ -3094,11 +3155,12 @@ pass_waccess::check_builtin (gcall *stmt) case BUILT_IN_FREE: case BUILT_IN_REALLOC: - { - tree arg = call_arg (stmt, 0); - if (TREE_CODE (arg) == SSA_NAME) - check_pointer_uses (stmt, arg); - } + if (!m_early_checks_p) + { + tree arg = call_arg (stmt, 0); + if (TREE_CODE (arg) == SSA_NAME) + check_pointer_uses (stmt, arg); + } return true; case BUILT_IN_GETTEXT: @@ -3725,16 +3787,67 @@ pass_waccess::maybe_check_dealloc_call (gcall *call) /* Return true if either USE_STMT's basic block (that of a pointer's use) is dominated by INVAL_STMT's (that of a pointer's invalidating statement, - or if they're in the same block, USE_STMT follows INVAL_STMT. */ + which is either a clobber or a deallocation call), or if they're in + the same block, USE_STMT follows INVAL_STMT. */ bool -pass_waccess::use_after_inval_p (gimple *inval_stmt, gimple *use_stmt) +pass_waccess::use_after_inval_p (gimple *inval_stmt, gimple *use_stmt, + bool last_block /* = false */) { + tree clobvar = + gimple_clobber_p (inval_stmt) ? gimple_assign_lhs (inval_stmt) : NULL_TREE; + basic_block inval_bb = gimple_bb (inval_stmt); basic_block use_bb = gimple_bb (use_stmt); + if (!inval_bb || !use_bb) + return false; + if (inval_bb != use_bb) - return dominated_by_p (CDI_DOMINATORS, use_bb, inval_bb); + { + if (dominated_by_p (CDI_DOMINATORS, use_bb, inval_bb)) + return true; + + if (!clobvar || !last_block) + return false; + + /* Proceed only when looking for uses of dangling pointers. */ + auto gsi = gsi_for_stmt (use_stmt); + + auto_bitmap visited; + + /* A use statement in the last basic block in a function or one that + falls through to it is after any other prior clobber of the used + variable unless it's followed by a clobber of the same variable. */ + basic_block bb = use_bb; + while (bb != inval_bb + && single_succ_p (bb) + && !(single_succ_edge (bb)->flags & (EDGE_EH|EDGE_DFS_BACK))) + { + if (!bitmap_set_bit (visited, bb->index)) + /* Avoid cycles. */ + return true; + + for (; !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) + { + gimple *stmt = gsi_stmt (gsi); + if (gimple_clobber_p (stmt)) + { + if (clobvar == gimple_assign_lhs (stmt)) + /* The use is followed by a clobber. */ + return false; + } + } + + bb = single_succ (bb); + gsi = gsi_start_bb (bb); + } + + /* The use is one of a dangling pointer if a clobber of the variable + [the pointer points to] has not been found before the function exit + point. */ + return bb == EXIT_BLOCK_PTR_FOR_FN (cfun); + } if (bitmap_set_bit (m_bb_uids_set, inval_bb->index)) /* The first time this basic block is visited assign increasing ids @@ -3752,27 +3865,30 @@ pass_waccess::use_after_inval_p (gimple *inval_stmt, gimple *use_stmt) return gimple_uid (inval_stmt) < gimple_uid (use_stmt); } -/* Issue a warning for the USE_STMT of pointer PTR rendered invalid - by INVAL_STMT. PTR may be null when it's been optimized away. - MAYBE is true to issue the "maybe" kind of warning. EQUALITY is - true when the pointer is used in an equality expression. */ +/* Issue a warning for the USE_STMT of pointer or reference REF rendered + invalid by INVAL_STMT. REF may be null when it's been optimized away. + When nonnull, INVAL_STMT is the deallocation function that rendered + the pointer or reference dangling. Otherwise, VAR is the auto variable + (including an unnamed temporary such as a compound literal) whose + lifetime's rended it dangling. MAYBE is true to issue the "maybe" + kind of warning. EQUALITY is true when the pointer is used in + an equality expression. */ void -pass_waccess::warn_invalid_pointer (tree ptr, gimple *use_stmt, - gimple *inval_stmt, - bool maybe, - bool equality /* = false */) +pass_waccess::warn_invalid_pointer (tree ref, gimple *use_stmt, + gimple *inval_stmt, tree var, + bool maybe, bool equality /* = false */) { /* Avoid printing the unhelpful "<unknown>" in the diagnostics. */ - if (ptr && TREE_CODE (ptr) == SSA_NAME - && (!SSA_NAME_VAR (ptr) || DECL_ARTIFICIAL (SSA_NAME_VAR (ptr)))) - ptr = NULL_TREE; + if (ref && TREE_CODE (ref) == SSA_NAME + && (!SSA_NAME_VAR (ref) || DECL_ARTIFICIAL (SSA_NAME_VAR (ref)))) + ref = NULL_TREE; location_t use_loc = gimple_location (use_stmt); if (use_loc == UNKNOWN_LOCATION) { - use_loc = cfun->function_end_locus; - if (!ptr) + use_loc = m_func->function_end_locus; + if (!ref) /* Avoid issuing a warning with no context other than the function. That would make it difficult to debug in any but very simple cases. */ @@ -3788,12 +3904,12 @@ pass_waccess::warn_invalid_pointer (tree ptr, gimple *use_stmt, const tree inval_decl = gimple_call_fndecl (inval_stmt); - if ((ptr && warning_at (use_loc, OPT_Wuse_after_free, + if ((ref && warning_at (use_loc, OPT_Wuse_after_free, (maybe ? G_("pointer %qE may be used after %qD") : G_("pointer %qE used after %qD")), - ptr, inval_decl)) - || (!ptr && warning_at (use_loc, OPT_Wuse_after_free, + ref, inval_decl)) + || (!ref && warning_at (use_loc, OPT_Wuse_after_free, (maybe ? G_("pointer may be used after %qD") : G_("pointer used after %qD")), @@ -3805,6 +3921,52 @@ pass_waccess::warn_invalid_pointer (tree ptr, gimple *use_stmt, } return; } + + if ((maybe && warn_dangling_pointer < 2) + || warning_suppressed_p (use_stmt, OPT_Wdangling_pointer_)) + return; + + if (DECL_NAME (var)) + { + if ((ref + && warning_at (use_loc, OPT_Wdangling_pointer_, + (maybe + ? G_("dangling pointer %qE to %qD may be used") + : G_("using dangling pointer %qE to %qD")), + ref, var)) + || (!ref + && warning_at (use_loc, OPT_Wdangling_pointer_, + (maybe + ? G_("dangling pointer to %qD may be used") + : G_("using a dangling pointer to %qD")), + var))) + inform (DECL_SOURCE_LOCATION (var), + "%qD declared here", var); + suppress_warning (use_stmt, OPT_Wdangling_pointer_); + return; + } + + if ((ref + && warning_at (use_loc, OPT_Wdangling_pointer_, + (maybe + ? G_("dangling pointer %qE to an unnamed temporary " + "may be used") + : G_("using dangling pointer %qE to an unnamed " + "temporary")), + ref, var)) + || (!ref + && warning_at (use_loc, OPT_Wdangling_pointer_, + (maybe + ? G_("dangling pointer to an unnamed temporary " + "may be used") + : G_("using a dangling pointer to an unnamed " + "temporary")), + var))) + { + inform (DECL_SOURCE_LOCATION (var), + "unnamed temporary defined here"); + suppress_warning (use_stmt, OPT_Wdangling_pointer_); + } } /* If STMT is a call to either the standard realloc or to a user-defined @@ -3927,10 +4089,14 @@ pointers_related_p (gimple *stmt, tree p, tree q, pointer_query &qry) /* For a STMT either a call to a deallocation function or a clobber, warn for uses of the pointer PTR it was called with (including its copies - or others derived from it by pointer arithmetic). */ + or others derived from it by pointer arithmetic). If STMT is a clobber, + VAR is the decl of the clobbered variable. When MAYBE is true use + a "maybe" form of diagnostic. */ void -pass_waccess::check_pointer_uses (gimple *stmt, tree ptr) +pass_waccess::check_pointer_uses (gimple *stmt, tree ptr, + tree var /* = NULL_TREE */, + bool maybe /* = false */) { gcc_assert (TREE_CODE (ptr) == SSA_NAME); @@ -4013,18 +4179,25 @@ pass_waccess::check_pointer_uses (gimple *stmt, tree ptr) /* Warn if USE_STMT is dominated by the deallocation STMT. Otherwise, add the pointer to POINTERS so that the uses of any other pointers derived from it can be checked. */ - if (use_after_inval_p (stmt, use_stmt)) + if (use_after_inval_p (stmt, use_stmt, check_dangling)) { - /* TODO: Handle PHIs but careful of false positives. */ - if (gimple_code (use_stmt) != GIMPLE_PHI) + if (gimple_code (use_stmt) == GIMPLE_PHI) { - basic_block use_bb = gimple_bb (use_stmt); - bool this_maybe - = !dominated_by_p (CDI_POST_DOMINATORS, use_bb, stmt_bb); - warn_invalid_pointer (*use_p->use, use_stmt, stmt, - this_maybe, equality); - continue; + tree lhs = gimple_phi_result (use_stmt); + if (TREE_CODE (lhs) == SSA_NAME) + { + pointers.safe_push (lhs); + continue; + } } + + basic_block use_bb = gimple_bb (use_stmt); + bool this_maybe + = (maybe + || !dominated_by_p (CDI_POST_DOMINATORS, use_bb, stmt_bb)); + warn_invalid_pointer (*use_p->use, use_stmt, stmt, var, + this_maybe, equality); + continue; } if (is_gimple_assign (use_stmt)) @@ -4059,26 +4232,100 @@ pass_waccess::check_call (gcall *stmt) if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL)) check_builtin (stmt); - if (tree callee = gimple_call_fndecl (stmt)) - { - /* Check for uses of the pointer passed to either a standard - or a user-defined deallocation function. */ - unsigned argno = fndecl_dealloc_argno (callee); - if (argno < (unsigned) call_nargs (stmt)) - { - tree arg = call_arg (stmt, argno); - if (TREE_CODE (arg) == SSA_NAME) - check_pointer_uses (stmt, arg); - } - } + if (!m_early_checks_p) + if (tree callee = gimple_call_fndecl (stmt)) + { + /* Check for uses of the pointer passed to either a standard + or a user-defined deallocation function. */ + unsigned argno = fndecl_dealloc_argno (callee); + if (argno < (unsigned) call_nargs (stmt)) + { + tree arg = call_arg (stmt, argno); + if (TREE_CODE (arg) == SSA_NAME) + check_pointer_uses (stmt, arg); + } + } check_call_access (stmt); + check_call_dangling (stmt); + + if (m_early_checks_p) + return; maybe_check_dealloc_call (stmt); check_nonstring_args (stmt); } +/* Return true of X is a DECL with automatic storage duration. */ + +static inline bool +is_auto_decl (tree x) +{ + return DECL_P (x) && !DECL_EXTERNAL (x) && !TREE_STATIC (x); +} + +/* Check non-call STMT for invalid accesses. */ + +void +pass_waccess::check_stmt (gimple *stmt) +{ + if (m_check_dangling_p && gimple_clobber_p (stmt)) + { + /* Ignore clobber statemts in blocks with exceptional edges. */ + basic_block bb = gimple_bb (stmt); + edge e = EDGE_PRED (bb, 0); + if (e->flags & EDGE_EH) + return; + + tree var = gimple_assign_lhs (stmt); + m_clobbers.put (var, stmt); + return; + } + + if (is_gimple_assign (stmt)) + { + /* Clobbered unnamed temporaries such as compound literals can be + revived. Check for an assignment to one and remove it from + M_CLOBBERS. */ + tree lhs = gimple_assign_lhs (stmt); + while (handled_component_p (lhs)) + lhs = TREE_OPERAND (lhs, 0); + + if (is_auto_decl (lhs)) + m_clobbers.remove (lhs); + return; + } + + if (greturn *ret = dyn_cast <greturn *> (stmt)) + { + if (optimize && flag_isolate_erroneous_paths_dereference) + /* Avoid interfering with -Wreturn-local-addr (which runs only + with optimization enabled). */ + return; + + tree arg = gimple_return_retval (ret); + if (!arg || TREE_CODE (arg) != ADDR_EXPR) + return; + + arg = TREE_OPERAND (arg, 0); + while (handled_component_p (arg)) + arg = TREE_OPERAND (arg, 0); + + if (!is_auto_decl (arg)) + return; + + gimple **pclobber = m_clobbers.get (arg); + if (!pclobber) + return; + + if (!use_after_inval_p (*pclobber, stmt)) + return; + + warn_invalid_pointer (NULL_TREE, stmt, *pclobber, arg, false); + } +} + /* Check basic block BB for invalid accesses. */ void @@ -4091,6 +4338,8 @@ pass_waccess::check_block (basic_block bb) gimple *stmt = gsi_stmt (si); if (gcall *call = dyn_cast <gcall *> (stmt)) check_call (call); + else + check_stmt (stmt); } } @@ -4139,6 +4388,262 @@ pass_waccess::gimple_call_return_arg (gcall *call) return gimple_call_arg (call, argno); } +/* Return the decl referenced by the argument that the call STMT to + a built-in function returns (including with an offset) or null if + it doesn't. */ + +tree +pass_waccess::gimple_call_return_arg_ref (gcall *call) +{ + if (tree arg = gimple_call_return_arg (call)) + { + access_ref aref; + if (m_ptr_qry.get_ref (arg, call, &aref, 0) + && DECL_P (aref.ref)) + return aref.ref; + } + + return NULL_TREE; +} + +/* Check for and diagnose all uses of the dangling pointer VAR to the auto + object DECL whose lifetime has ended. OBJREF is true when VAR denotes + an access to a DECL that may have been clobbered. */ + +void +pass_waccess::check_dangling_uses (tree var, tree decl, bool maybe /* = false */, + bool objref /* = false */) +{ + if (!decl || !is_auto_decl (decl)) + return; + + gimple **pclob = m_clobbers.get (decl); + if (!pclob) + return; + + if (!objref) + { + check_pointer_uses (*pclob, var, decl, maybe); + return; + } + + gimple *use_stmt = SSA_NAME_DEF_STMT (var); + if (!use_after_inval_p (*pclob, use_stmt, true)) + return; + + basic_block use_bb = gimple_bb (use_stmt); + basic_block clob_bb = gimple_bb (*pclob); + maybe = maybe || !dominated_by_p (CDI_POST_DOMINATORS, use_bb, clob_bb); + warn_invalid_pointer (var, use_stmt, *pclob, decl, maybe, false); +} + +/* Diagnose stores in BB and (recursively) its predecessors of the addresses + of local variables into nonlocal pointers that are left dangling after + the function returns. BBS is a bitmap of basic blocks visited. */ + +void +pass_waccess::check_dangling_stores (basic_block bb, + hash_set<tree> &stores, + auto_bitmap &bbs) +{ + if (!bitmap_set_bit (bbs, bb->index)) + /* Avoid cycles. */ + return; + + /* Iterate backwards over the statements looking for a store of + the address of a local variable into a nonlocal pointer. */ + for (auto gsi = gsi_last_nondebug_bb (bb); ; gsi_prev_nondebug (&gsi)) + { + gimple *stmt = gsi_stmt (gsi); + if (!stmt) + break; + + if (is_gimple_call (stmt) + && !(gimple_call_flags (stmt) & (ECF_CONST | ECF_PURE))) + /* Avoid looking before nonconst, nonpure calls since those might + use the escaped locals. */ + return; + + if (!is_gimple_assign (stmt) || gimple_clobber_p (stmt)) + continue; + + access_ref lhs_ref; + tree lhs = gimple_assign_lhs (stmt); + if (!m_ptr_qry.get_ref (lhs, stmt, &lhs_ref, 0)) + continue; + + if (is_auto_decl (lhs_ref.ref)) + continue; + + if (DECL_P (lhs_ref.ref)) + { + if (!POINTER_TYPE_P (TREE_TYPE (lhs_ref.ref)) + || lhs_ref.deref > 0) + continue; + } + else if (TREE_CODE (lhs_ref.ref) == SSA_NAME) + { + /* Avoid looking at or before stores into unknown objects. */ + gimple *def_stmt = SSA_NAME_DEF_STMT (lhs_ref.ref); + if (!gimple_nop_p (def_stmt)) + return; + } + else if (TREE_CODE (lhs_ref.ref) == MEM_REF) + { + tree arg = TREE_OPERAND (lhs_ref.ref, 0); + if (TREE_CODE (arg) == SSA_NAME) + { + gimple *def_stmt = SSA_NAME_DEF_STMT (arg); + if (!gimple_nop_p (def_stmt)) + return; + } + } + else + continue; + + if (stores.add (lhs_ref.ref)) + continue; + + /* FIXME: Handle stores of alloca() and VLA. */ + access_ref rhs_ref; + tree rhs = gimple_assign_rhs1 (stmt); + if (!m_ptr_qry.get_ref (rhs, stmt, &rhs_ref, 0) + || rhs_ref.deref != -1) + continue; + + if (!is_auto_decl (rhs_ref.ref)) + continue; + + location_t loc = gimple_location (stmt); + if (warning_at (loc, OPT_Wdangling_pointer_, + "storing the address of local variable %qD in %qE", + rhs_ref.ref, lhs)) + { + location_t loc = DECL_SOURCE_LOCATION (rhs_ref.ref); + inform (loc, "%qD declared here", rhs_ref.ref); + + if (DECL_P (lhs_ref.ref)) + loc = DECL_SOURCE_LOCATION (lhs_ref.ref); + else if (EXPR_HAS_LOCATION (lhs_ref.ref)) + loc = EXPR_LOCATION (lhs_ref.ref); + + if (loc != UNKNOWN_LOCATION) + inform (loc, "%qE declared here", lhs_ref.ref); + } + } + + edge e; + edge_iterator ei; + FOR_EACH_EDGE (e, ei, bb->preds) + { + basic_block pred = e->src; + check_dangling_stores (pred, stores, bbs); + } +} + +/* Diagnose stores of the addresses of local variables into nonlocal + pointers that are left dangling after the function returns. */ + +void +pass_waccess::check_dangling_stores () +{ + auto_bitmap bbs; + hash_set<tree> stores; + check_dangling_stores (EXIT_BLOCK_PTR_FOR_FN (m_func), stores, bbs); +} + +/* Check for and diagnose uses of dangling pointers to auto objects + whose lifetime has ended. */ + +void +pass_waccess::check_dangling_uses () +{ + tree var; + unsigned i; + FOR_EACH_SSA_NAME (i, var, m_func) + { + /* For each SSA_NAME pointer VAR find the DECL it points to. + If the DECL is a clobbered local variable, check to see + if any of VAR's uses (or those of other pointers derived + from VAR) happens after the clobber. If so, warn. */ + tree decl = NULL_TREE; + + gimple *def_stmt = SSA_NAME_DEF_STMT (var); + if (is_gimple_assign (def_stmt)) + { + tree rhs = gimple_assign_rhs1 (def_stmt); + if (TREE_CODE (rhs) == ADDR_EXPR) + { + if (!POINTER_TYPE_P (TREE_TYPE (var))) + continue; + decl = TREE_OPERAND (rhs, 0); + } + else + { + /* For other expressions, check the base DECL to see + if it's been clobbered, most likely as a result of </cut>

4 years, 1 month

[ACTIVITY] week ending Jan. 16 2022

by Alex Bennée

Project Stratos =============== - reviewed Peter's virtio-video patches for QEMU [PR to clean up some typos in EDK2] <https://github.com/tianocore/edk2-platforms/pull/34> vhost-device maintainer effort ([UM-196]) - started reviewing https://github.com/rust-vmm/vhost-device/pull/7 - looking pretty good, see how https://github.com/rust-vmm/vm-virtio/commit/463dd20552fc32139bbbb56e9152df… would work with it [UM-196] <https://linaro.atlassian.net/browse/UM-196> QEMU Upstream Work ([UM-2]) =========================== - posted [RFC PATCH 0/6] Basic skeleton of RP2040 Raspbery Pi Pico Message-Id: <20220110175104.2908956-1-alex.bennee(a)linaro.org> - posted [PATCH v1 00/34] testing/next and other misc fixes Message-Id: <20220105135009.1584676-1-alex.bennee(a)linaro.org> - and the eventual [PULL 00/31] testing/next and other misc fixes Message-Id: <20220112112722.3641051-1-alex.bennee(a)linaro.org> - and the inevitable fixup [RFC PATCH] linux-user: expand reserved brk space for 64bit guests Message-Id: <20220113165550.4184455-1-alex.bennee(a)linaro.org> [UM-2] <https://linaro.atlassian.net/browse/UM-2> Upstream MTTCG tests ([QEMU-52]) - still waiting final review of [kvm-unit-tests PATCH v9 0/9] MTTCG sanity tests for ARM Message-Id: <20211202115352.951548-1-alex.bennee(a)linaro.org> [QEMU-52] <https://linaro.atlassian.net/browse/QEMU-52> Completed Reviews [6/6] ======================= [PATCH] tests/docker: Add gentoo-loongarch64-cross image and run cross builds in GitLab Message-Id: <20211229062204.3726981-1-git(a)xen0n.name> [PATCH 0/2] tests/tcg: Fix float_{convs,madds} Message-Id: <20211224035541.2159966-1-richard.henderson(a)linaro.org> [PATCH v5 00/18] tests/docker: start using libvirt-ci's "lcitool" for dockerfiles Message-Id: <20211215141949.3512719-1-berrange(a)redhat.com> [PATCH] tests/tcg: Unconditionally use 90 second timeout Message-Id: <20211230235424.49155-1-richard.henderson(a)linaro.org> [PATCH] gitlab-ci: Speed up the msys2-64bit job by using --without-default-devices Message-Id: <20211216082253.43899-1-thuth(a)redhat.com> [PATCH 0/8] virtio: Add vhost-user based Video decode Message-Id: <20211209145601.331477-1-peter.griffin(a)linaro.org> Absences ======== Current Review Queue ==================== TODO [PATCH v2 00/11] Atomic cleanup + clang-12 build fix Message-Id: <20210717014121.1784956-1-richard.henderson(a)linaro.org> ============================================================================================================================ TODO [PATCH 0/7] tcg: some small towards more modular tcg Message-Id: <20210804143826.3402872-1-kraxel(a)redhat.com> ================================================================================================================= TODO [PATCH 0/6] Introduce CanoKey QEMU Message-Id: <YcSupUSXWDXOAkas@Sun> ========================================================================= TODO [PATCH] target/arm: Add missing FEAT_TLBIOS instructions Message-Id: <20211231103928.1455657-1-idan.horowitz(a)gmail.com> =========================================================================================================================== -- Alex Bennée

4 years, 1 month

[ACTIVITY] week ending Jan. 16 2022

by Alex Bennée

Project Stratos =============== - reviewed Peter's virtio-video patches for QEMU [PR to clean up some typos in EDK2] <https://github.com/tianocore/edk2-platforms/pull/34> vhost-device maintainer effort ([UM-196]) - started reviewing https://github.com/rust-vmm/vhost-device/pull/7 - looking pretty good, see how https://github.com/rust-vmm/vm-virtio/commit/463dd20552fc32139bbbb56e9152df… would work with it [UM-196] <https://linaro.atlassian.net/browse/UM-196> QEMU Upstream Work ([UM-2]) =========================== - posted [RFC PATCH 0/6] Basic skeleton of RP2040 Raspbery Pi Pico Message-Id: <20220110175104.2908956-1-alex.bennee(a)linaro.org> - posted [PATCH v1 00/34] testing/next and other misc fixes Message-Id: <20220105135009.1584676-1-alex.bennee(a)linaro.org> - and the eventual [PULL 00/31] testing/next and other misc fixes Message-Id: <20220112112722.3641051-1-alex.bennee(a)linaro.org> - and the inevitable fixup [RFC PATCH] linux-user: expand reserved brk space for 64bit guests Message-Id: <20220113165550.4184455-1-alex.bennee(a)linaro.org> [UM-2] <https://linaro.atlassian.net/browse/UM-2> Upstream MTTCG tests ([QEMU-52]) - still waiting final review of [kvm-unit-tests PATCH v9 0/9] MTTCG sanity tests for ARM Message-Id: <20211202115352.951548-1-alex.bennee(a)linaro.org> [QEMU-52] <https://linaro.atlassian.net/browse/QEMU-52> Completed Reviews [6/6] ======================= [PATCH] tests/docker: Add gentoo-loongarch64-cross image and run cross builds in GitLab Message-Id: <20211229062204.3726981-1-git(a)xen0n.name> [PATCH 0/2] tests/tcg: Fix float_{convs,madds} Message-Id: <20211224035541.2159966-1-richard.henderson(a)linaro.org> [PATCH v5 00/18] tests/docker: start using libvirt-ci's "lcitool" for dockerfiles Message-Id: <20211215141949.3512719-1-berrange(a)redhat.com> [PATCH] tests/tcg: Unconditionally use 90 second timeout Message-Id: <20211230235424.49155-1-richard.henderson(a)linaro.org> [PATCH] gitlab-ci: Speed up the msys2-64bit job by using --without-default-devices Message-Id: <20211216082253.43899-1-thuth(a)redhat.com> [PATCH 0/8] virtio: Add vhost-user based Video decode Message-Id: <20211209145601.331477-1-peter.griffin(a)linaro.org> Absences ======== Current Review Queue ==================== TODO [PATCH 0/6] Introduce CanoKey QEMU Message-Id: <YcSupUSXWDXOAkas@Sun> ========================================================================= TODO [PATCH] target/arm: Add missing FEAT_TLBIOS instructions Message-Id: <20211231103928.1455657-1-idan.horowitz(a)gmail.com> ======================================================================================================================== TODO [PATCH-4.16 v2] xen/efi: Fix Grub2 boot on arm64 Message-Id: <20211104141206.25153-1-luca.fancellu(a)arm.com> =============================================================================================================== -- Alex Bennée

4 years, 1 month

[ACTIVITY] report week ending 14 Jan

by Peter Maydell

Progress: * UM-2 [QEMU upstream maintainership] - Most of this week was spent on continuing to work through my code-review queue :-/ - Sent a few minor cleanup patches for linux-user nits I noticed while reading the code as part of reviewing a big bsd-user patchset * QEMU-420 [GICv4 emulation] - got some reviewed ITS cleanup patches upstream - rerolled and sent v2 patchset for the rest of the cleanup patches - got back up to speed with where I left my GICv4 ITS patches before Christmas, and dealt with some minor loose ends I'd left in the last patch or two I was working on. -- PMM

4 years, 1 month

On holiday through 22 Jan

by Richard Henderson

Hi Peter, Welcome back, hope you had a good Christmas break. I'm off oh holiday myself for the next two weeks, so this would be an ideal time to pass back merge control to you. The board is mostly green now, with occasional allowed failures for centos-stream and freebsd for upstream package manager failures. See yall in a couple of weeks. r~

4 years, 2 months

[ACTIVITY] week ending 9 Jan 2022

by Richard Henderson

[UM-2] * Re-greening of gitlab-ci. - There are continuing issues with cross-i386-tci. Occasionally I see *really* long test times: https://gitlab.com/qemu-project/qemu/-/jobs/1941996332 with qtest-aarch64/qom-test taking 1738s, or 28 of the 60 minute budget. More often it's merely slow: https://gitlab.com/qemu-project/qemu/-/jobs/1954634840 with qtest-aarch64/qom-test taking 538s. Note that locally this test runs in about 100s, and I have been unable to determine why it runs so much slower on gitlab. - Worked on a ppc64-softmmu slowdown leading to timeouts. - Fixes for meson regressions affecting testing. * Refresh tcg unaligned user patch sets. r~

4 years, 2 months

[ACTIVITY] report week ending 7 Jan

by Peter Maydell

Progress (short week, 2 days): * UM-2 [QEMU upstream maintainership] - Catching up with email and codereview backlog from 3 weeks holiday :-) (Have got the codereview queue down to less than a dozen things so should be able to do some more GICv4 development next week.) -- PMM

4 years, 2 months

[ACTIVITY] week ending Dec. 19 2021

by Alex Bennée

Project Stratos =============== - got Xen working on the MachiatoBin - posted Configuring the host GIC for guest to guest IPI Message-Id: <87fsqwn2sd.fsf(a)linaro.org> QEMU Upstream Work ([UM-2]) =========================== - posted [RFC PATCH] linux-user: don't adjust base of found hole Message-Id: <20211216144442.2270605-1-alex.bennee(a)linaro.org> - posted [PATCH] hw/arm: add control knob to disable kaslr_seed via DTB Message-Id: <20211215120926.1696302-1-alex.bennee(a)linaro.org> Completed Reviews [3/3] ======================= [PATCH 00/26] arm gicv3 ITS: Various bug fixes and refactorings Message-Id: <20211211191135.1764649-1-peter.maydell(a)linaro.org> [PATCH for-7.0 0/6] target/arm: Implement LVA, LPA, LPA2 features Message-Id: <20211208231154.392029-1-richard.henderson(a)linaro.org> [PATCH-for-6.2? v2 0/5] docs/devel/style: Improve rST rendering Message-Id: <20211118145716.4116731-1-philmd(a)redhat.com> Absences ======== Off for holidays, back in the new year. Merry Christmas everyone! -- Alex Bennée

4 years, 2 months

[TCWG CI] Regression caused by gcc: tree-object-size: Use trees and support negative offsets

by ci_notify＠linaro.org

[TCWG CI] Regression caused by gcc: tree-object-size: Use trees and support negative offsets: commit 422f9eb7011b76c12ff00ffaee2bcc9cdddf16d5 Author: Siddhesh Poyarekar <siddhesh(a)gotplt.org> tree-object-size: Use trees and support negative offsets Results regressed to # reset_artifacts: -10 # build_abe binutils: -9 # build_abe stage1: -5 # build_abe qemu: -2 # linux_n_obj: 550 # First few build errors in logs: # 00:01:37 ./include/linux/thread_info.h:213:25: error: call to ‘__bad_copy_to’ declared with attribute error: copy destination size is too small # 00:01:37 ./include/linux/thread_info.h:213:25: error: call to ‘__bad_copy_to’ declared with attribute error: copy destination size is too small # 00:01:37 make[1]: *** [scripts/Makefile.build:287: fs/io_uring.o] Error 1 # 00:01:37 make: *** [Makefile:1846: fs] Error 2 from # reset_artifacts: -10 # build_abe binutils: -9 # build_abe stage1: -5 # build_abe qemu: -2 # linux_n_obj: 567 # linux build successful: all THIS IS THE END OF INTERESTING STUFF. BELOW ARE LINKS TO BUILDS, REPRODUCTION INSTRUCTIONS, AND THE RAW COMMIT. This commit has regressed these CI configurations: - tcwg_kernel/gnu-master-arm-mainline-allnoconfig First_bad build: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-arm-mainline-al… Last_good build: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-arm-mainline-al… Baseline build: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-arm-mainline-al… Even more details: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-arm-mainline-al… Reproduce builds: <cut> mkdir investigate-gcc-422f9eb7011b76c12ff00ffaee2bcc9cdddf16d5 cd investigate-gcc-422f9eb7011b76c12ff00ffaee2bcc9cdddf16d5 # Fetch scripts git clone https://git.linaro.org/toolchain/jenkins-scripts # Fetch manifests and test.sh script mkdir -p artifacts/manifests curl -o artifacts/manifests/build-baseline.sh https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-arm-mainline-al… --fail curl -o artifacts/manifests/build-parameters.sh https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-arm-mainline-al… --fail curl -o artifacts/test.sh https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-master-arm-mainline-al… --fail chmod +x artifacts/test.sh # Reproduce the baseline build (build all pre-requisites) ./jenkins-scripts/tcwg_kernel-build.sh @@ artifacts/manifests/build-baseline.sh # Save baseline build state (which is then restored in artifacts/test.sh) mkdir -p ./bisect rsync -a --del --delete-excluded --exclude /bisect/ --exclude /artifacts/ --exclude /gcc/ ./ ./bisect/baseline/ cd gcc # Reproduce first_bad build git checkout --detach 422f9eb7011b76c12ff00ffaee2bcc9cdddf16d5 ../artifacts/test.sh # Reproduce last_good build git checkout --detach 871504b0dd5cd023d3a28cf9e5ccbda75928b102 ../artifacts/test.sh cd .. </cut> Full commit (up to 1000 lines): <cut> commit 422f9eb7011b76c12ff00ffaee2bcc9cdddf16d5 Author: Siddhesh Poyarekar <siddhesh(a)gotplt.org> Date: Fri Dec 17 07:07:18 2021 +0530 tree-object-size: Use trees and support negative offsets Transform tree-object-size to operate on tree objects instead of host wide integers. This makes it easier to extend to dynamic expressions for object sizes. The compute_builtin_object_size interface also now returns a tree expression instead of HOST_WIDE_INT, so callers have been adjusted to account for that. The trees in object_sizes are each an object_size object with members size (the bytes from the pointer to the end of the object) and wholesize (the size of the whole object). This allows analysis of negative offsets, which can now be allowed to the extent of the object bounds. Tests have been added to verify that it actually works. gcc/ChangeLog: * tree-object-size.h (compute_builtin_object_size): Return tree instead of HOST_WIDE_INT. * builtins.c (fold_builtin_object_size): Adjust. * gimple-fold.c (gimple_fold_builtin_strncat): Likewise. * ubsan.c (instrument_object_size): Likewise. * tree-object-size.c (object_size): New structure. (object_sizes): Change type to vec<object_size>. (initval): New function. (unknown): Use it. (size_unknown_p, size_initval, size_unknown): New functions. (object_sizes_unknown_p): Use it. (object_sizes_get): Return tree. (object_sizes_initialize): Rename from object_sizes_set_force and set VAL parameter type as tree. Add new parameter WHOLEVAL. (object_sizes_set): Set VAL parameter type as tree and adjust implementation. Add new parameter WHOLEVAL. (size_for_offset): New function. (decl_init_size): Adjust comment. (addr_object_size): Change PSIZE parameter to tree and adjust implementation. Add new parameter PWHOLESIZE. (alloc_object_size): Return tree. (compute_builtin_object_size): Return tree in PSIZE. (expr_object_size, call_object_size, unknown_object_size): Adjust for object_sizes_set change. (merge_object_sizes): Drop OFFSET parameter and adjust implementation for tree change. (plus_stmt_object_size): Call collect_object_sizes_for directly instead of merge_object_size and call size_for_offset to get net size. (cond_expr_object_size, collect_object_sizes_for, object_sizes_execute): Adjust for change of type from HOST_WIDE_INT to tree. (check_for_plus_in_loops_1): Likewise and skip non-positive offsets. gcc/testsuite/ChangeLog: * gcc.dg/builtin-object-size-1.c (test9): New test. (main): Call it. * gcc.dg/builtin-object-size-2.c (test8): New test. (main): Call it. * gcc.dg/builtin-object-size-3.c (test9): New test. (main): Call it. * gcc.dg/builtin-object-size-4.c (test8): New test. (main): Call it. * gcc.dg/builtin-object-size-5.c (test5, test6, test7): New tests. Signed-off-by: Siddhesh Poyarekar <siddhesh(a)gotplt.org> --- gcc/builtins.c | 10 +- gcc/gimple-fold.c | 11 +- gcc/testsuite/gcc.dg/builtin-object-size-1.c | 30 ++ gcc/testsuite/gcc.dg/builtin-object-size-2.c | 30 ++ gcc/testsuite/gcc.dg/builtin-object-size-3.c | 31 +++ gcc/testsuite/gcc.dg/builtin-object-size-4.c | 30 ++ gcc/testsuite/gcc.dg/builtin-object-size-5.c | 25 ++ gcc/tree-object-size.c | 394 +++++++++++++++++---------- gcc/tree-object-size.h | 2 +- gcc/ubsan.c | 5 +- 10 files changed, 409 insertions(+), 159 deletions(-) diff --git a/gcc/builtins.c b/gcc/builtins.c index cd8947b4de2..abe342e111d 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -10255,7 +10255,7 @@ maybe_emit_sprintf_chk_warning (tree exp, enum built_in_function fcode) static tree fold_builtin_object_size (tree ptr, tree ost) { - unsigned HOST_WIDE_INT bytes; + tree bytes; int object_size_type; if (!validate_arg (ptr, POINTER_TYPE) @@ -10280,8 +10280,8 @@ fold_builtin_object_size (tree ptr, tree ost) if (TREE_CODE (ptr) == ADDR_EXPR) { compute_builtin_object_size (ptr, object_size_type, &bytes); - if (wi::fits_to_tree_p (bytes, size_type_node)) - return build_int_cstu (size_type_node, bytes); + if (int_fits_type_p (bytes, size_type_node)) + return fold_convert (size_type_node, bytes); } else if (TREE_CODE (ptr) == SSA_NAME) { @@ -10289,8 +10289,8 @@ fold_builtin_object_size (tree ptr, tree ost) later. Maybe subsequent passes will help determining it. */ if (compute_builtin_object_size (ptr, object_size_type, &bytes) - && wi::fits_to_tree_p (bytes, size_type_node)) - return build_int_cstu (size_type_node, bytes); + && int_fits_type_p (bytes, size_type_node)) + return fold_convert (size_type_node, bytes); } return NULL_TREE; diff --git a/gcc/gimple-fold.c b/gcc/gimple-fold.c index 1d8fd74f72c..64515aabc04 100644 --- a/gcc/gimple-fold.c +++ b/gcc/gimple-fold.c @@ -2493,17 +2493,16 @@ gimple_fold_builtin_strncat (gimple_stmt_iterator *gsi) if (!src_len || known_lower (stmt, len, src_len, true)) return false; - unsigned HOST_WIDE_INT dstsize; - bool found_dstsize = compute_builtin_object_size (dst, 1, &dstsize); - /* Warn on constant LEN. */ if (TREE_CODE (len) == INTEGER_CST) { bool nowarn = warning_suppressed_p (stmt, OPT_Wstringop_overflow_); + tree dstsize; - if (!nowarn && found_dstsize) + if (!nowarn && compute_builtin_object_size (dst, 1, &dstsize) + && TREE_CODE (dstsize) == INTEGER_CST) { - int cmpdst = compare_tree_int (len, dstsize); + int cmpdst = tree_int_cst_compare (len, dstsize); if (cmpdst >= 0) { @@ -2519,7 +2518,7 @@ gimple_fold_builtin_strncat (gimple_stmt_iterator *gsi) ? G_("%qD specified bound %E equals " "destination size") : G_("%qD specified bound %E exceeds " - "destination size %wu"), + "destination size %E"), fndecl, len, dstsize); if (nowarn) suppress_warning (stmt, OPT_Wstringop_overflow_); diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-1.c b/gcc/testsuite/gcc.dg/builtin-object-size-1.c index 8cdae49a6b1..0154f4e9695 100644 --- a/gcc/testsuite/gcc.dg/builtin-object-size-1.c +++ b/gcc/testsuite/gcc.dg/builtin-object-size-1.c @@ -424,6 +424,35 @@ test8 (void) abort (); } +void +__attribute__ ((noinline)) +test9 (unsigned cond) +{ + char *buf2 = malloc (10); + char *p; + + if (cond) + p = &buf2[8]; + else + p = &buf2[4]; + + if (__builtin_object_size (&p[-4], 0) != 10) + abort (); + + for (unsigned i = cond; i > 0; i--) + p--; + + if (__builtin_object_size (p, 0) != 10) + abort (); + + p = &y.c[8]; + for (unsigned i = cond; i > 0; i--) + p--; + + if (__builtin_object_size (p, 0) != sizeof (y)) + abort (); +} + int main (void) { @@ -437,5 +466,6 @@ main (void) test6 (4); test7 (); test8 (); + test9 (1); exit (0); } diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-2.c b/gcc/testsuite/gcc.dg/builtin-object-size-2.c index ad2dd296a9a..5cf29291aff 100644 --- a/gcc/testsuite/gcc.dg/builtin-object-size-2.c +++ b/gcc/testsuite/gcc.dg/builtin-object-size-2.c @@ -382,6 +382,35 @@ test7 (void) abort (); } +void +__attribute__ ((noinline)) +test8 (unsigned cond) +{ + char *buf2 = malloc (10); + char *p; + + if (cond) + p = &buf2[8]; + else + p = &buf2[4]; + + if (__builtin_object_size (&p[-4], 1) != 10) + abort (); + + for (unsigned i = cond; i > 0; i--) + p--; + + if (__builtin_object_size (p, 1) != 10) + abort (); + + p = &y.c[8]; + for (unsigned i = cond; i > 0; i--) + p--; + + if (__builtin_object_size (p, 1) != sizeof (y.c)) + abort (); +} + int main (void) { @@ -394,5 +423,6 @@ main (void) test5 (4); test6 (); test7 (); + test8 (1); exit (0); } diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-3.c b/gcc/testsuite/gcc.dg/builtin-object-size-3.c index d5ca5047ee9..3a692c4e3d2 100644 --- a/gcc/testsuite/gcc.dg/builtin-object-size-3.c +++ b/gcc/testsuite/gcc.dg/builtin-object-size-3.c @@ -430,6 +430,36 @@ test8 (void) abort (); } +void +__attribute__ ((noinline)) +test9 (unsigned cond) +{ + char *buf2 = malloc (10); + char *p; + + if (cond) + p = &buf2[8]; + else + p = &buf2[4]; + + if (__builtin_object_size (&p[-4], 2) != 6) + abort (); + + for (unsigned i = cond; i > 0; i--) + p--; + + if (__builtin_object_size (p, 2) != 2) + abort (); + + p = &y.c[8]; + for (unsigned i = cond; i > 0; i--) + p--; + + if (__builtin_object_size (p, 2) + != sizeof (y) - __builtin_offsetof (struct A, c) - 8) + abort (); +} + int main (void) { @@ -443,5 +473,6 @@ main (void) test6 (4); test7 (); test8 (); + test9 (1); exit (0); } diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-4.c b/gcc/testsuite/gcc.dg/builtin-object-size-4.c index 9f159e36a0f..87381620cc9 100644 --- a/gcc/testsuite/gcc.dg/builtin-object-size-4.c +++ b/gcc/testsuite/gcc.dg/builtin-object-size-4.c @@ -395,6 +395,35 @@ test7 (void) abort (); } +void +__attribute__ ((noinline)) +test8 (unsigned cond) +{ + char *buf2 = malloc (10); + char *p; + + if (cond) + p = &buf2[8]; + else + p = &buf2[4]; + + if (__builtin_object_size (&p[-4], 3) != 6) + abort (); + + for (unsigned i = cond; i > 0; i--) + p--; + + if (__builtin_object_size (p, 3) != 2) + abort (); + + p = &y.c[8]; + for (unsigned i = cond; i > 0; i--) + p--; + + if (__builtin_object_size (p, 3) != sizeof (y.c) - 8) + abort (); +} + int main (void) { @@ -407,5 +436,6 @@ main (void) test5 (4); test6 (); test7 (); + test8 (1); exit (0); } diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-5.c b/gcc/testsuite/gcc.dg/builtin-object-size-5.c index 7c274cdfd42..8e63d9c7a5e 100644 --- a/gcc/testsuite/gcc.dg/builtin-object-size-5.c +++ b/gcc/testsuite/gcc.dg/builtin-object-size-5.c @@ -53,4 +53,29 @@ test4 (size_t x) abort (); } +void +test5 (void) +{ + char *p = &buf[0x90000004]; + if (__builtin_object_size (p + 2, 0) != 0) + abort (); +} + +void +test6 (void) +{ + char *p = &buf[-4]; + if (__builtin_object_size (p + 2, 0) != 0) + abort (); +} + +void +test7 (void) +{ + char *buf2 = __builtin_malloc (8); + char *p = &buf2[0x90000004]; + if (__builtin_object_size (p + 2, 0) != 0) + abort (); +} + /* { dg-final { scan-assembler-not "abort" } } */ diff --git a/gcc/tree-object-size.c b/gcc/tree-object-size.c index b4881ef198f..32ef6dd5133 100644 --- a/gcc/tree-object-size.c +++ b/gcc/tree-object-size.c @@ -45,6 +45,14 @@ struct object_size_info unsigned int *stack, *tos; }; +struct GTY(()) object_size +{ + /* Estimate of bytes till the end of the object. */ + tree size; + /* Estimate of the size of the whole object. */ + tree wholesize; +}; + enum { OST_SUBOBJECT = 1, @@ -54,13 +62,12 @@ enum static tree compute_object_offset (const_tree, const_tree); static bool addr_object_size (struct object_size_info *, - const_tree, int, unsigned HOST_WIDE_INT *); -static unsigned HOST_WIDE_INT alloc_object_size (const gcall *, int); + const_tree, int, tree *, tree *t = NULL); +static tree alloc_object_size (const gcall *, int); static tree pass_through_call (const gcall *); static void collect_object_sizes_for (struct object_size_info *, tree); static void expr_object_size (struct object_size_info *, tree, tree); -static bool merge_object_sizes (struct object_size_info *, tree, tree, - unsigned HOST_WIDE_INT); +static bool merge_object_sizes (struct object_size_info *, tree, tree); static bool plus_stmt_object_size (struct object_size_info *, tree, gimple *); static bool cond_expr_object_size (struct object_size_info *, tree, gimple *); static void init_offset_limit (void); @@ -68,13 +75,13 @@ static void check_for_plus_in_loops (struct object_size_info *, tree); static void check_for_plus_in_loops_1 (struct object_size_info *, tree, unsigned int); -/* object_sizes[0] is upper bound for number of bytes till the end of - the object. - object_sizes[1] is upper bound for number of bytes till the end of - the subobject (innermost array or field with address taken). - object_sizes[2] is lower bound for number of bytes till the end of - the object and object_sizes[3] lower bound for subobject. */ -static vec<unsigned HOST_WIDE_INT> object_sizes[OST_END]; +/* object_sizes[0] is upper bound for the object size and number of bytes till + the end of the object. + object_sizes[1] is upper bound for the object size and number of bytes till + the end of the subobject (innermost array or field with address taken). + object_sizes[2] is lower bound for the object size and number of bytes till + the end of the object and object_sizes[3] lower bound for subobject. */ +static vec<object_size> object_sizes[OST_END]; /* Bitmaps what object sizes have been computed already. */ static bitmap computed[OST_END]; @@ -82,10 +89,46 @@ static bitmap computed[OST_END]; /* Maximum value of offset we consider to be addition. */ static unsigned HOST_WIDE_INT offset_limit; +/* Initial value of object sizes; zero for maximum and SIZE_MAX for minimum + object size. */ + +static inline unsigned HOST_WIDE_INT +initval (int object_size_type) +{ + return (object_size_type & OST_MINIMUM) ? HOST_WIDE_INT_M1U : 0; +} + +/* Unknown object size value; it's the opposite of initval. */ + static inline unsigned HOST_WIDE_INT unknown (int object_size_type) { - return ((unsigned HOST_WIDE_INT) -((object_size_type >> 1) ^ 1)); + return ~initval (object_size_type); +} + +/* Return true if VAL is represents an unknown size for OBJECT_SIZE_TYPE. */ + +static inline bool +size_unknown_p (tree val, int object_size_type) +{ + return (tree_fits_uhwi_p (val) + && tree_to_uhwi (val) == unknown (object_size_type)); +} + +/* Return a tree with initial value for OBJECT_SIZE_TYPE. */ + +static inline tree +size_initval (int object_size_type) +{ + return size_int (initval (object_size_type)); +} + +/* Return a tree with unknown value for OBJECT_SIZE_TYPE. */ + +static inline tree +size_unknown (int object_size_type) +{ + return size_int (unknown (object_size_type)); } /* Grow object_sizes[OBJECT_SIZE_TYPE] to num_ssa_names. */ @@ -110,47 +153,57 @@ object_sizes_release (int object_size_type) static inline bool object_sizes_unknown_p (int object_size_type, unsigned varno) { - return (object_sizes[object_size_type][varno] - == unknown (object_size_type)); + return size_unknown_p (object_sizes[object_size_type][varno].size, + object_size_type); } -/* Return size for VARNO corresponding to OSI. */ +/* Return size for VARNO corresponding to OSI. If WHOLE is true, return the + whole object size. */ -static inline unsigned HOST_WIDE_INT -object_sizes_get (struct object_size_info *osi, unsigned varno) +static inline tree +object_sizes_get (struct object_size_info *osi, unsigned varno, + bool whole = false) { - return object_sizes[osi->object_size_type][varno]; + if (whole) + return object_sizes[osi->object_size_type][varno].wholesize; + else + return object_sizes[osi->object_size_type][varno].size; } /* Set size for VARNO corresponding to OSI to VAL. */ -static inline bool -object_sizes_set_force (struct object_size_info *osi, unsigned varno, - unsigned HOST_WIDE_INT val) +static inline void +object_sizes_initialize (struct object_size_info *osi, unsigned varno, + tree val, tree wholeval) { - object_sizes[osi->object_size_type][varno] = val; - return true; + int object_size_type = osi->object_size_type; + + object_sizes[object_size_type][varno].size = val; + object_sizes[object_size_type][varno].wholesize = wholeval; } /* Set size for VARNO corresponding to OSI to VAL if it is the new minimum or maximum. */ static inline bool -object_sizes_set (struct object_size_info *osi, unsigned varno, - unsigned HOST_WIDE_INT val) +object_sizes_set (struct object_size_info *osi, unsigned varno, tree val, + tree wholeval) { int object_size_type = osi->object_size_type; - if ((object_size_type & OST_MINIMUM) == 0) - { - if (object_sizes[object_size_type][varno] < val) - return object_sizes_set_force (osi, varno, val); - } - else - { - if (object_sizes[object_size_type][varno] > val) - return object_sizes_set_force (osi, varno, val); - } - return false; + object_size osize = object_sizes[object_size_type][varno]; + + tree oldval = osize.size; + tree old_wholeval = osize.wholesize; + + enum tree_code code = object_size_type & OST_MINIMUM ? MIN_EXPR : MAX_EXPR; + + val = size_binop (code, val, oldval); + wholeval = size_binop (code, wholeval, old_wholeval); + + object_sizes[object_size_type][varno].size = val; + object_sizes[object_size_type][varno].wholesize = wholeval; + return (tree_int_cst_compare (oldval, val) != 0 + || tree_int_cst_compare (old_wholeval, wholeval) != 0); } /* Initialize OFFSET_LIMIT variable. */ @@ -164,6 +217,48 @@ init_offset_limit (void) offset_limit /= 2; } +/* Bytes at end of the object with SZ from offset OFFSET. If WHOLESIZE is not + NULL_TREE, use it to get the net offset of the pointer, which should always + be positive and hence, be within OFFSET_LIMIT for valid offsets. */ + +static tree +size_for_offset (tree sz, tree offset, tree wholesize = NULL_TREE) +{ + gcc_checking_assert (TREE_CODE (offset) == INTEGER_CST); + gcc_checking_assert (TREE_CODE (sz) == INTEGER_CST); + gcc_checking_assert (types_compatible_p (TREE_TYPE (sz), sizetype)); + + /* For negative offsets, if we have a distinct WHOLESIZE, use it to get a net + offset from the whole object. */ + if (wholesize && tree_int_cst_compare (sz, wholesize)) + { + gcc_checking_assert (TREE_CODE (wholesize) == INTEGER_CST); + gcc_checking_assert (types_compatible_p (TREE_TYPE (wholesize), + sizetype)); + + /* Restructure SZ - OFFSET as + WHOLESIZE - (WHOLESIZE + OFFSET - SZ) so that the offset part, i.e. + WHOLESIZE + OFFSET - SZ is only allowed to be positive. */ + tree tmp = size_binop (MAX_EXPR, wholesize, sz); + offset = fold_build2 (PLUS_EXPR, sizetype, tmp, offset); + offset = fold_build2 (MINUS_EXPR, sizetype, offset, sz); + sz = tmp; + } + + /* Safe to convert now, since a valid net offset should be non-negative. */ + if (!types_compatible_p (TREE_TYPE (offset), sizetype)) + fold_convert (sizetype, offset); + + if (integer_zerop (offset)) + return sz; + + /* Negative or too large offset even after adjustment, cannot be within + bounds of an object. */ + if (compare_tree_int (offset, offset_limit) > 0) + return size_zero_node; + + return size_binop (MINUS_EXPR, size_binop (MAX_EXPR, sz, offset), offset); +} /* Compute offset of EXPR within VAR. Return error_mark_node if unknown. */ @@ -274,19 +369,22 @@ decl_init_size (tree decl, bool min) /* Compute __builtin_object_size for PTR, which is a ADDR_EXPR. OBJECT_SIZE_TYPE is the second argument from __builtin_object_size. - If unknown, return unknown (object_size_type). */ + If unknown, return size_unknown (object_size_type). */ static bool addr_object_size (struct object_size_info *osi, const_tree ptr, - int object_size_type, unsigned HOST_WIDE_INT *psize) + int object_size_type, tree *psize, tree *pwholesize) { - tree pt_var, pt_var_size = NULL_TREE, var_size, bytes; + tree pt_var, pt_var_size = NULL_TREE, pt_var_wholesize = NULL_TREE; + tree var_size, bytes, wholebytes; gcc_assert (TREE_CODE (ptr) == ADDR_EXPR); /* Set to unknown and overwrite just before returning if the size could be determined. */ - *psize = unknown (object_size_type); + *psize = size_unknown (object_size_type); + if (pwholesize) + *pwholesize = size_unknown (object_size_type); pt_var = TREE_OPERAND (ptr, 0); while (handled_component_p (pt_var)) @@ -297,13 +395,14 @@ addr_object_size (struct object_size_info *osi, const_tree ptr, if (TREE_CODE (pt_var) == MEM_REF) { - unsigned HOST_WIDE_INT sz; + tree sz, wholesize; if (!osi || (object_size_type & OST_SUBOBJECT) != 0 || TREE_CODE (TREE_OPERAND (pt_var, 0)) != SSA_NAME) { compute_builtin_object_size (TREE_OPERAND (pt_var, 0), object_size_type & ~OST_SUBOBJECT, &sz); + wholesize = sz; } else { @@ -312,46 +411,47 @@ addr_object_size (struct object_size_info *osi, const_tree ptr, collect_object_sizes_for (osi, var); if (bitmap_bit_p (computed[object_size_type], SSA_NAME_VERSION (var))) - sz = object_sizes_get (osi, SSA_NAME_VERSION (var)); + { + sz = object_sizes_get (osi, SSA_NAME_VERSION (var)); + wholesize = object_sizes_get (osi, SSA_NAME_VERSION (var), true); + } else - sz = unknown (object_size_type); + sz = wholesize = size_unknown (object_size_type); } - if (sz != unknown (object_size_type)) + if (!size_unknown_p (sz, object_size_type)) { - offset_int mem_offset; - if (mem_ref_offset (pt_var).is_constant (&mem_offset)) - { - offset_int dsz = wi::sub (sz, mem_offset); - if (wi::neg_p (dsz)) - sz = 0; - else if (wi::fits_uhwi_p (dsz)) - sz = dsz.to_uhwi (); - else - sz = unknown (object_size_type); - } + tree offset = TREE_OPERAND (pt_var, 1); + if (TREE_CODE (offset) != INTEGER_CST + || TREE_CODE (sz) != INTEGER_CST) + sz = wholesize = size_unknown (object_size_type); else - sz = unknown (object_size_type); + sz = size_for_offset (sz, offset, wholesize); } - if (sz != unknown (object_size_type) && sz < offset_limit) - pt_var_size = size_int (sz); + if (!size_unknown_p (sz, object_size_type) + && TREE_CODE (sz) == INTEGER_CST + && compare_tree_int (sz, offset_limit) < 0) + { + pt_var_size = sz; + pt_var_wholesize = wholesize; + } } else if (DECL_P (pt_var)) { - pt_var_size = decl_init_size (pt_var, object_size_type & OST_MINIMUM); + pt_var_size = pt_var_wholesize + = decl_init_size (pt_var, object_size_type & OST_MINIMUM); if (!pt_var_size) return false; } else if (TREE_CODE (pt_var) == STRING_CST) - pt_var_size = TYPE_SIZE_UNIT (TREE_TYPE (pt_var)); + pt_var_size = pt_var_wholesize = TYPE_SIZE_UNIT (TREE_TYPE (pt_var)); else return false; if (pt_var_size) { /* Validate the size determined above. */ - if (!tree_fits_uhwi_p (pt_var_size) - || tree_to_uhwi (pt_var_size) >= offset_limit) + if (compare_tree_int (pt_var_size, offset_limit) >= 0) return false; } @@ -496,28 +596,35 @@ addr_object_size (struct object_size_info *osi, const_tree ptr, bytes = size_binop (MIN_EXPR, bytes, bytes2); } } + + wholebytes + = object_size_type & OST_SUBOBJECT ? var_size : pt_var_wholesize; } else if (!pt_var_size) return false; else - bytes = pt_var_size; - - if (tree_fits_uhwi_p (bytes)) { - *psize = tree_to_uhwi (bytes); - return true; + bytes = pt_var_size; + wholebytes = pt_var_wholesize; } - return false; + if (TREE_CODE (bytes) != INTEGER_CST + || TREE_CODE (wholebytes) != INTEGER_CST) + return false; + + *psize = bytes; + if (pwholesize) + *pwholesize = wholebytes; + return true; } /* Compute __builtin_object_size for CALL, which is a GIMPLE_CALL. Handles calls to functions declared with attribute alloc_size. OBJECT_SIZE_TYPE is the second argument from __builtin_object_size. - If unknown, return unknown (object_size_type). */ + If unknown, return size_unknown (object_size_type). */ -static unsigned HOST_WIDE_INT +static tree alloc_object_size (const gcall *call, int object_size_type) { gcc_assert (is_gimple_call (call)); @@ -529,7 +636,7 @@ alloc_object_size (const gcall *call, int object_size_type) calltype = gimple_call_fntype (call); if (!calltype) - return unknown (object_size_type); + return size_unknown (object_size_type); /* Set to positions of alloc_size arguments. */ int arg1 = -1, arg2 = -1; @@ -549,7 +656,7 @@ alloc_object_size (const gcall *call, int object_size_type) || (arg2 >= 0 && (arg2 >= (int)gimple_call_num_args (call) || TREE_CODE (gimple_call_arg (call, arg2)) != INTEGER_CST))) - return unknown (object_size_type); + return size_unknown (object_size_type); tree bytes = NULL_TREE; if (arg2 >= 0) @@ -559,10 +666,7 @@ alloc_object_size (const gcall *call, int object_size_type) else if (arg1 >= 0) bytes = fold_convert (sizetype, gimple_call_arg (call, arg1)); - if (bytes && tree_fits_uhwi_p (bytes)) - return tree_to_uhwi (bytes); - - return unknown (object_size_type); + return bytes; } @@ -598,13 +702,13 @@ pass_through_call (const gcall *call) bool compute_builtin_object_size (tree ptr, int object_size_type, - unsigned HOST_WIDE_INT *psize) + tree *psize) { gcc_assert (object_size_type >= 0 && object_size_type < OST_END); /* Set to unknown and overwrite just before returning if the size could be determined. */ - *psize = unknown (object_size_type); + *psize = size_unknown (object_size_type); if (! offset_limit) init_offset_limit (); @@ -638,8 +742,7 @@ compute_builtin_object_size (tree ptr, int object_size_type, psize)) { /* Return zero when the offset is out of bounds. */ - unsigned HOST_WIDE_INT off = tree_to_shwi (offset); - *psize = off < *psize ? *psize - off : 0; + *psize = size_for_offset (*psize, offset); return true; } } @@ -747,12 +850,13 @@ compute_builtin_object_size (tree ptr, int object_size_type, print_generic_expr (dump_file, ssa_name (i), dump_flags); fprintf (dump_file, - ": %s %sobject size " - HOST_WIDE_INT_PRINT_UNSIGNED "\n", + ": %s %sobject size ", ((object_size_type & OST_MINIMUM) ? "minimum" : "maximum"), - (object_size_type & OST_SUBOBJECT) ? "sub" : "", - object_sizes_get (&osi, i)); + (object_size_type & OST_SUBOBJECT) ? "sub" : ""); + print_generic_expr (dump_file, object_sizes_get (&osi, i), + dump_flags); + fprintf (dump_file, "\n"); } } @@ -761,7 +865,7 @@ compute_builtin_object_size (tree ptr, int object_size_type, } *psize = object_sizes_get (&osi, SSA_NAME_VERSION (ptr)); - return *psize != unknown (object_size_type); + return !size_unknown_p (*psize, object_size_type); } /* Compute object_sizes for PTR, defined to VALUE, which is not an SSA_NAME. */ @@ -771,7 +875,7 @@ expr_object_size (struct object_size_info *osi, tree ptr, tree value) { int object_size_type = osi->object_size_type; unsigned int varno = SSA_NAME_VERSION (ptr); - unsigned HOST_WIDE_INT bytes; + tree bytes, wholesize; gcc_assert (!object_sizes_unknown_p (object_size_type, varno)); gcc_assert (osi->pass == 0); @@ -784,11 +888,11 @@ expr_object_size (struct object_size_info *osi, tree ptr, tree value) || !POINTER_TYPE_P (TREE_TYPE (value))); if (TREE_CODE (value) == ADDR_EXPR) - addr_object_size (osi, value, object_size_type, &bytes); + addr_object_size (osi, value, object_size_type, &bytes, &wholesize); else - bytes = unknown (object_size_type); + bytes = wholesize = size_unknown (object_size_type); - object_sizes_set (osi, varno, bytes); + object_sizes_set (osi, varno, bytes, wholesize); } @@ -799,16 +903,14 @@ call_object_size (struct object_size_info *osi, tree ptr, gcall *call) { int object_size_type = osi->object_size_type; unsigned int varno = SSA_NAME_VERSION (ptr); - unsigned HOST_WIDE_INT bytes; gcc_assert (is_gimple_call (call)); gcc_assert (!object_sizes_unknown_p (object_size_type, varno)); gcc_assert (osi->pass == 0); + tree bytes = alloc_object_size (call, object_size_type); - bytes = alloc_object_size (call, object_size_type); - - object_sizes_set (osi, varno, bytes); + object_sizes_set (osi, varno, bytes, bytes); } @@ -822,8 +924,9 @@ unknown_object_size (struct object_size_info *osi, tree ptr) gcc_checking_assert (!object_sizes_unknown_p (object_size_type, varno)); gcc_checking_assert (osi->pass == 0); + tree bytes = size_unknown (object_size_type); - object_sizes_set (osi, varno, unknown (object_size_type)); + object_sizes_set (osi, varno, bytes, bytes); } @@ -831,30 +934,22 @@ unknown_object_size (struct object_size_info *osi, tree ptr) the object size might need reexamination later. */ static bool -merge_object_sizes (struct object_size_info *osi, tree dest, tree orig, - unsigned HOST_WIDE_INT offset) +merge_object_sizes (struct object_size_info *osi, tree dest, tree orig) { int object_size_type = osi->object_size_type; unsigned int varno = SSA_NAME_VERSION (dest); - unsigned HOST_WIDE_INT orig_bytes; + tree orig_bytes, wholesize; if (object_sizes_unknown_p (object_size_type, varno)) return false; - if (offset >= offset_limit) - { - object_sizes_set (osi, varno, unknown (object_size_type)); - return false; - } if (osi->pass == 0) collect_object_sizes_for (osi, orig); orig_bytes = object_sizes_get (osi, SSA_NAME_VERSION (orig)); - if (orig_bytes != unknown (object_size_type)) - orig_bytes = (offset > orig_bytes) - ? HOST_WIDE_INT_0U : orig_bytes - offset; + wholesize = object_sizes_get (osi, SSA_NAME_VERSION (orig), true); - if (object_sizes_set (osi, varno, orig_bytes)) + if (object_sizes_set (osi, varno, orig_bytes, wholesize)) osi->changed = true; return bitmap_bit_p (osi->reexamine, SSA_NAME_VERSION (orig)); @@ -870,8 +965,9 @@ plus_stmt_object_size (struct object_size_info *osi, tree var, gimple *stmt) { int object_size_type = osi->object_size_type; unsigned int varno = SSA_NAME_VERSION (var); - unsigned HOST_WIDE_INT bytes; + tree bytes, wholesize; tree op0, op1; + bool reexamine = false; if (gimple_assign_rhs_code (stmt) == POINTER_PLUS_EXPR) { @@ -896,31 +992,38 @@ plus_stmt_object_size (struct object_size_info *osi, tree var, gimple *stmt) && (TREE_CODE (op0) == SSA_NAME || TREE_CODE (op0) == ADDR_EXPR)) { - if (! tree_fits_uhwi_p (op1)) - bytes = unknown (object_size_type); - else if (TREE_CODE (op0) == SSA_NAME) - return merge_object_sizes (osi, var, op0, tree_to_uhwi (op1)); + if (TREE_CODE (op0) == SSA_NAME) + { + if (osi->pass == 0) + collect_object_sizes_for (osi, op0); + + bytes = object_sizes_get (osi, SSA_NAME_VERSION (op0)); + wholesize = object_sizes_get (osi, SSA_NAME_VERSION (op0), true); + reexamine = bitmap_bit_p (osi->reexamine, SSA_NAME_VERSION (op0)); + } else { - unsigned HOST_WIDE_INT off = tree_to_uhwi (op1); - - /* op0 will be ADDR_EXPR here. */ - addr_object_size (osi, op0, object_size_type, &bytes); - if (bytes == unknown (object_size_type)) - ; - else if (off > offset_limit) - bytes = unknown (object_size_type); - else if (off > bytes) - bytes = 0; - else - bytes -= off; + /* op0 will be ADDR_EXPR here. We should never come here during + reexamination. */ + gcc_checking_assert (osi->pass == 0); + addr_object_size (osi, op0, object_size_type, &bytes, &wholesize); } + + /* In the first pass, do not compute size for offset if either the + maximum size is unknown or the minimum size is not initialized yet; + the latter indicates a dependency loop and will be resolved in + subsequent passes. We attempt to compute offset for 0 minimum size + too because a negative offset could be within bounds of WHOLESIZE, + giving a non-zero result for VAR. */ + if (osi->pass != 0 || !size_unknown_p (bytes, 0)) + bytes = size_for_offset (bytes, op1, wholesize); } else - bytes = unknown (object_size_type); </cut>

4 years, 2 months

[TCWG CI] 464.h264ref slowed down by 4% after llvm: [SLP]Improve multinode analysis.

by ci_notify＠linaro.org

After llvm commit bd053769867f988500dc1b451c6439eefcf7643f Author: Alexey Bataev <a.bataev(a)outlook.com> [SLP]Improve multinode analysis. the following benchmarks slowed down by more than 2%: - 464.h264ref slowed down by 4% from 11205 to 11640 perf samples Below reproducer instructions can be used to re-build both "first_bad" and "last_good" cross-toolchains used in this bisection. Naturally, the scripts will fail when triggerring benchmarking jobs if you don't have access to Linaro TCWG CI. For your convenience, we have uploaded tarballs with pre-processed source and assembly files at: - First_bad save-temps: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… - Last_good save-temps: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… - Baseline save-temps: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… Configuration: - Benchmark: SPEC CPU2006 - Toolchain: Clang + Glibc + LLVM Linker - Version: all components were built from their tip of trunk - Target: aarch64-linux-gnu - Compiler flags: -O3 -flto - Hardware: NVidia TX1 4x Cortex-A57 This benchmarking CI is work-in-progress, and we welcome feedback and suggestions at linaro-toolchain(a)lists.linaro.org . In our improvement plans is to add support for SPEC CPU2017 benchmarks and provide "perf report/annotate" data behind these reports. THIS IS THE END OF INTERESTING STUFF. BELOW ARE LINKS TO BUILDS, REPRODUCTION INSTRUCTIONS, AND THE RAW COMMIT. This commit has regressed these CI configurations: - tcwg_bmk_llvm_tx1/llvm-master-aarch64-spec2k6-O3_LTO First_bad build: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… Last_good build: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… Baseline build: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… Even more details: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… Reproduce builds: <cut> mkdir investigate-llvm-bd053769867f988500dc1b451c6439eefcf7643f cd investigate-llvm-bd053769867f988500dc1b451c6439eefcf7643f # Fetch scripts git clone https://git.linaro.org/toolchain/jenkins-scripts # Fetch manifests and test.sh script mkdir -p artifacts/manifests curl -o artifacts/manifests/build-baseline.sh https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… --fail curl -o artifacts/manifests/build-parameters.sh https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… --fail curl -o artifacts/test.sh https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-… --fail chmod +x artifacts/test.sh # Reproduce the baseline build (build all pre-requisites) ./jenkins-scripts/tcwg_bmk-build.sh @@ artifacts/manifests/build-baseline.sh # Save baseline build state (which is then restored in artifacts/test.sh) mkdir -p ./bisect rsync -a --del --delete-excluded --exclude /bisect/ --exclude /artifacts/ --exclude /llvm/ ./ ./bisect/baseline/ cd llvm # Reproduce first_bad build git checkout --detach bd053769867f988500dc1b451c6439eefcf7643f ../artifacts/test.sh # Reproduce last_good build git checkout --detach 135d5d4a6d37f30173c1b9ea85a3a969c364b241 ../artifacts/test.sh cd .. </cut> Full commit (up to 1000 lines): <cut> commit bd053769867f988500dc1b451c6439eefcf7643f Author: Alexey Bataev <a.bataev(a)outlook.com> Date: Tue Apr 6 08:35:52 2021 -0700 [SLP]Improve multinode analysis. Changes the preliminary multinode analysis: 1. Introduced scores for reversed loads/extractelements. 2. Improved shallow score calculation. 3. Lowered the cost of external uses (no need to consider it several times, just ones). 4. The initial lane for analysis is the one with the minimal possible reorderings. These changes in general shall reduce compile time and improve the reordering in many cases. Part of D57059. Differential Revision: https://reviews.llvm.org/D101109 --- llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp | 253 ++++++++++++++++----- .../AArch64/transpose-inseltpoison.ll | 30 +-- .../Transforms/SLPVectorizer/AArch64/transpose.ll | 30 +-- .../AArch64/vectorize-free-extracts-inserts.ll | 20 +- llvm/test/Transforms/SLPVectorizer/X86/PR39774.ll | 2 +- llvm/test/Transforms/SLPVectorizer/X86/addsub.ll | 24 +- .../Transforms/SLPVectorizer/X86/commutativity.ll | 20 +- .../SLPVectorizer/X86/crash_exceed_scheduling.ll | 6 +- .../Transforms/SLPVectorizer/X86/crash_smallpt.ll | 18 +- .../Transforms/SLPVectorizer/X86/extractelement.ll | 4 +- .../Transforms/SLPVectorizer/X86/insert-shuffle.ll | 34 ++- .../test/Transforms/SLPVectorizer/X86/lookahead.ll | 35 +-- .../Transforms/SLPVectorizer/X86/operandorder.ll | 44 ++-- .../Transforms/SLPVectorizer/X86/store-jumbled.ll | 4 +- .../SLPVectorizer/X86/stores_vectorize.ll | 6 +- .../test/Transforms/SLPVectorizer/X86/supernode.ll | 2 +- 16 files changed, 328 insertions(+), 204 deletions(-) diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp index d145b04c0694..c685432ae28e 100644 --- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp +++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp @@ -1016,18 +1016,25 @@ public: std::swap(OpsVec[OpIdx1][Lane], OpsVec[OpIdx2][Lane]); } - // The hard-coded scores listed here are not very important. When computing - // the scores of matching one sub-tree with another, we are basically - // counting the number of values that are matching. So even if all scores - // are set to 1, we would still get a decent matching result. + // The hard-coded scores listed here are not very important, though it shall + // be higher for better matches to improve the resulting cost. When + // computing the scores of matching one sub-tree with another, we are + // basically counting the number of values that are matching. So even if all + // scores are set to 1, we would still get a decent matching result. // However, sometimes we have to break ties. For example we may have to // choose between matching loads vs matching opcodes. This is what these - // scores are helping us with: they provide the order of preference. + // scores are helping us with: they provide the order of preference. Also, + // this is important if the scalar is externally used or used in another + // tree entry node in the different lane. /// Loads from consecutive memory addresses, e.g. load(A[i]), load(A[i+1]). - static const int ScoreConsecutiveLoads = 3; + static const int ScoreConsecutiveLoads = 4; + /// Loads from reversed memory addresses, e.g. load(A[i+1]), load(A[i]). + static const int ScoreReversedLoads = 3; /// ExtractElementInst from same vector and consecutive indexes. - static const int ScoreConsecutiveExtracts = 3; + static const int ScoreConsecutiveExtracts = 4; + /// ExtractElementInst from same vector and reversed indices. + static const int ScoreReversedExtracts = 3; /// Constants. static const int ScoreConstants = 2; /// Instructions with the same opcode. @@ -1047,7 +1054,10 @@ public: /// \returns the score of placing \p V1 and \p V2 in consecutive lanes. static int getShallowScore(Value *V1, Value *V2, const DataLayout &DL, - ScalarEvolution &SE) { + ScalarEvolution &SE, int NumLanes) { + if (V1 == V2) + return VLOperands::ScoreSplat; + auto *LI1 = dyn_cast<LoadInst>(V1); auto *LI2 = dyn_cast<LoadInst>(V2); if (LI1 && LI2) { @@ -1057,8 +1067,17 @@ public: Optional<int> Dist = getPointersDiff( LI1->getType(), LI1->getPointerOperand(), LI2->getType(), LI2->getPointerOperand(), DL, SE, /*StrictCheck=*/true); - return (Dist && *Dist == 1) ? VLOperands::ScoreConsecutiveLoads - : VLOperands::ScoreFail; + if (!Dist) + return VLOperands::ScoreFail; + // The distance is too large - still may be profitable to use masked + // loads/gathers. + if (std::abs(*Dist) > NumLanes / 2) + return VLOperands::ScoreAltOpcodes; + // This still will detect consecutive loads, but we might have "holes" + // in some cases. It is ok for non-power-2 vectorization and may produce + // better results. It should not affect current vectorization. + return (*Dist > 0) ? VLOperands::ScoreConsecutiveLoads + : VLOperands::ScoreReversedLoads; } auto *C1 = dyn_cast<Constant>(V1); @@ -1068,18 +1087,41 @@ public: // Extracts from consecutive indexes of the same vector better score as // the extracts could be optimized away. - Value *EV; - ConstantInt *Ex1Idx, *Ex2Idx; - if (match(V1, m_ExtractElt(m_Value(EV), m_ConstantInt(Ex1Idx))) && - match(V2, m_ExtractElt(m_Deferred(EV), m_ConstantInt(Ex2Idx))) && - Ex1Idx->getZExtValue() + 1 == Ex2Idx->getZExtValue()) - return VLOperands::ScoreConsecutiveExtracts; + Value *EV1; + ConstantInt *Ex1Idx; + if (match(V1, m_ExtractElt(m_Value(EV1), m_ConstantInt(Ex1Idx)))) { + // Undefs are always profitable for extractelements. + if (isa<UndefValue>(V2)) + return VLOperands::ScoreConsecutiveExtracts; + Value *EV2 = nullptr; + ConstantInt *Ex2Idx = nullptr; + if (match(V2, + m_ExtractElt(m_Value(EV2), m_CombineOr(m_ConstantInt(Ex2Idx), + m_Undef())))) { + // Undefs are always profitable for extractelements. + if (!Ex2Idx) + return VLOperands::ScoreConsecutiveExtracts; + if (isUndefVector(EV2) && EV2->getType() == EV1->getType()) + return VLOperands::ScoreConsecutiveExtracts; + if (EV2 == EV1) { + int Idx1 = Ex1Idx->getZExtValue(); + int Idx2 = Ex2Idx->getZExtValue(); + int Dist = Idx2 - Idx1; + // The distance is too large - still may be profitable to use + // shuffles. + if (std::abs(Dist) > NumLanes / 2) + return VLOperands::ScoreAltOpcodes; + return (Dist > 0) ? VLOperands::ScoreConsecutiveExtracts + : VLOperands::ScoreReversedExtracts; + } + } + } auto *I1 = dyn_cast<Instruction>(V1); auto *I2 = dyn_cast<Instruction>(V2); if (I1 && I2) { - if (I1 == I2) - return VLOperands::ScoreSplat; + if (I1->getParent() != I2->getParent()) + return VLOperands::ScoreFail; InstructionsState S = getSameOpcode({I1, I2}); // Note: Only consider instructions with <= 2 operands to avoid // complexity explosion. @@ -1094,11 +1136,13 @@ public: return VLOperands::ScoreFail; } - /// Holds the values and their lane that are taking part in the look-ahead + /// Holds the values and their lanes that are taking part in the look-ahead /// score calculation. This is used in the external uses cost calculation. - SmallDenseMap<Value *, int> InLookAheadValues; + /// Need to hold all the lanes in case of splat/broadcast at least to + /// correctly check for the use in the different lane. + SmallDenseMap<Value *, SmallSet<int, 4>> InLookAheadValues; - /// \Returns the additinal cost due to uses of \p LHS and \p RHS that are + /// \returns the additional cost due to uses of \p LHS and \p RHS that are /// either external to the vectorized code, or require shuffling. int getExternalUsesCost(const std::pair<Value *, int> &LHS, const std::pair<Value *, int> &RHS) { @@ -1122,22 +1166,30 @@ public: for (User *U : V->users()) { if (const TreeEntry *UserTE = R.getTreeEntry(U)) { // The user is in the VectorizableTree. Check if we need to insert. - auto It = llvm::find(UserTE->Scalars, U); - assert(It != UserTE->Scalars.end() && "U is in UserTE"); - int UserLn = std::distance(UserTE->Scalars.begin(), It); + int UserLn = UserTE->findLaneForValue(U); assert(UserLn >= 0 && "Bad lane"); - if (UserLn != Ln) + // If the values are different, check just the line of the current + // value. If the values are the same, need to add UserInDiffLaneCost + // only if UserLn does not match both line numbers. + if ((LHS.first != RHS.first && UserLn != Ln) || + (LHS.first == RHS.first && UserLn != LHS.second && + UserLn != RHS.second)) { Cost += UserInDiffLaneCost; + break; + } } else { // Check if the user is in the look-ahead code. auto It2 = InLookAheadValues.find(U); if (It2 != InLookAheadValues.end()) { // The user is in the look-ahead code. Check the lane. - if (It2->second != Ln) + if (!It2->getSecond().contains(Ln)) { Cost += UserInDiffLaneCost; + break; + } } else { // The user is neither in SLP tree nor in the look-ahead code. Cost += ExternalUseCost; + break; } } // Limit the number of visited uses to cap compilation time. @@ -1176,32 +1228,36 @@ public: Value *V1 = LHS.first; Value *V2 = RHS.first; // Get the shallow score of V1 and V2. - int ShallowScoreAtThisLevel = - std::max((int)ScoreFail, getShallowScore(V1, V2, DL, SE) - - getExternalUsesCost(LHS, RHS)); + int ShallowScoreAtThisLevel = std::max( + (int)ScoreFail, getShallowScore(V1, V2, DL, SE, getNumLanes()) - + getExternalUsesCost(LHS, RHS)); int Lane1 = LHS.second; int Lane2 = RHS.second; // If reached MaxLevel, // or if V1 and V2 are not instructions, // or if they are SPLAT, - // or if they are not consecutive, early return the current cost. + // or if they are not consecutive, + // or if profitable to vectorize loads or extractelements, early return + // the current cost. auto *I1 = dyn_cast<Instruction>(V1); auto *I2 = dyn_cast<Instruction>(V2); if (CurrLevel == MaxLevel || !(I1 && I2) || I1 == I2 || ShallowScoreAtThisLevel == VLOperands::ScoreFail || - (isa<LoadInst>(I1) && isa<LoadInst>(I2) && ShallowScoreAtThisLevel)) + (((isa<LoadInst>(I1) && isa<LoadInst>(I2)) || + (isa<ExtractElementInst>(I1) && isa<ExtractElementInst>(I2))) && + ShallowScoreAtThisLevel)) return ShallowScoreAtThisLevel; assert(I1 && I2 && "Should have early exited."); // Keep track of in-tree values for determining the external-use cost. - InLookAheadValues[V1] = Lane1; - InLookAheadValues[V2] = Lane2; + InLookAheadValues[V1].insert(Lane1); + InLookAheadValues[V2].insert(Lane2); // Contains the I2 operand indexes that got matched with I1 operands. SmallSet<unsigned, 4> Op2Used; - // Recursion towards the operands of I1 and I2. We are trying all possbile + // Recursion towards the operands of I1 and I2. We are trying all possible // operand pairs, and keeping track of the best score. for (unsigned OpIdx1 = 0, NumOperands1 = I1->getNumOperands(); OpIdx1 != NumOperands1; ++OpIdx1) { @@ -1325,27 +1381,79 @@ public: return None; } - /// Helper for reorderOperandVecs. \Returns the lane that we should start - /// reordering from. This is the one which has the least number of operands - /// that can freely move about. + /// Helper for reorderOperandVecs. + /// \returns the lane that we should start reordering from. This is the one + /// which has the least number of operands that can freely move about or + /// less profitable because it already has the most optimal set of operands. unsigned getBestLaneToStartReordering() const { - unsigned BestLane = 0; unsigned Min = UINT_MAX; - for (unsigned Lane = 0, NumLanes = getNumLanes(); Lane != NumLanes; - ++Lane) { - unsigned NumFreeOps = getMaxNumOperandsThatCanBeReordered(Lane); - if (NumFreeOps < Min) { - Min = NumFreeOps; - BestLane = Lane; + unsigned SameOpNumber = 0; + // std::pair<unsigned, unsigned> is used to implement a simple voting + // algorithm and choose the lane with the least number of operands that + // can freely move about or less profitable because it already has the + // most optimal set of operands. The first unsigned is a counter for + // voting, the second unsigned is the counter of lanes with instructions + // with same/alternate opcodes and same parent basic block. + MapVector<unsigned, std::pair<unsigned, unsigned>> HashMap; + // Try to be closer to the original results, if we have multiple lanes + // with same cost. If 2 lanes have the same cost, use the one with the + // lowest index. + for (int I = getNumLanes(); I > 0; --I) { + unsigned Lane = I - 1; + OperandsOrderData NumFreeOpsHash = + getMaxNumOperandsThatCanBeReordered(Lane); + // Compare the number of operands that can move and choose the one with + // the least number. + if (NumFreeOpsHash.NumOfAPOs < Min) { + Min = NumFreeOpsHash.NumOfAPOs; + SameOpNumber = NumFreeOpsHash.NumOpsWithSameOpcodeParent; + HashMap.clear(); + HashMap[NumFreeOpsHash.Hash] = std::make_pair(1, Lane); + } else if (NumFreeOpsHash.NumOfAPOs == Min && + NumFreeOpsHash.NumOpsWithSameOpcodeParent < SameOpNumber) { + // Select the most optimal lane in terms of number of operands that + // should be moved around. + SameOpNumber = NumFreeOpsHash.NumOpsWithSameOpcodeParent; + HashMap[NumFreeOpsHash.Hash] = std::make_pair(1, Lane); + } else if (NumFreeOpsHash.NumOfAPOs == Min && + NumFreeOpsHash.NumOpsWithSameOpcodeParent == SameOpNumber) { + ++HashMap[NumFreeOpsHash.Hash].first; + } + } + // Select the lane with the minimum counter. + unsigned BestLane = 0; + unsigned CntMin = UINT_MAX; + for (const auto &Data : reverse(HashMap)) { + if (Data.second.first < CntMin) { + CntMin = Data.second.first; + BestLane = Data.second.second; } } return BestLane; } - /// \Returns the maximum number of operands that are allowed to be reordered - /// for \p Lane. This is used as a heuristic for selecting the first lane to - /// start operand reordering. - unsigned getMaxNumOperandsThatCanBeReordered(unsigned Lane) const { + /// Data structure that helps to reorder operands. + struct OperandsOrderData { + /// The best number of operands with the same APOs, which can be + /// reordered. + unsigned NumOfAPOs = UINT_MAX; + /// Number of operands with the same/alternate instruction opcode and + /// parent. + unsigned NumOpsWithSameOpcodeParent = 0; + /// Hash for the actual operands ordering. + /// Used to count operands, actually their position id and opcode + /// value. It is used in the voting mechanism to find the lane with the + /// least number of operands that can freely move about or less profitable + /// because it already has the most optimal set of operands. Can be + /// replaced with SmallVector<unsigned> instead but hash code is faster + /// and requires less memory. + unsigned Hash = 0; + }; + /// \returns the maximum number of operands that are allowed to be reordered + /// for \p Lane and the number of compatible instructions(with the same + /// parent/opcode). This is used as a heuristic for selecting the first lane + /// to start operand reordering. + OperandsOrderData getMaxNumOperandsThatCanBeReordered(unsigned Lane) const { unsigned CntTrue = 0; unsigned NumOperands = getNumOperands(); // Operands with the same APO can be reordered. We therefore need to count @@ -1354,11 +1462,45 @@ public: // a map. Instead we can simply count the number of operands that // correspond to one of them (in this case the 'true' APO), and calculate // the other by subtracting it from the total number of operands. - for (unsigned OpIdx = 0; OpIdx != NumOperands; ++OpIdx) - if (getData(OpIdx, Lane).APO) + // Operands with the same instruction opcode and parent are more + // profitable since we don't need to move them in many cases, with a high + // probability such lane already can be vectorized effectively. + bool AllUndefs = true; + unsigned NumOpsWithSameOpcodeParent = 0; + Instruction *OpcodeI = nullptr; + BasicBlock *Parent = nullptr; + unsigned Hash = 0; + for (unsigned OpIdx = 0; OpIdx != NumOperands; ++OpIdx) { + const OperandData &OpData = getData(OpIdx, Lane); + if (OpData.APO) ++CntTrue; - unsigned CntFalse = NumOperands - CntTrue; - return std::max(CntTrue, CntFalse); + // Use Boyer-Moore majority voting for finding the majority opcode and + // the number of times it occurs. + if (auto *I = dyn_cast<Instruction>(OpData.V)) { + if (!OpcodeI || !getSameOpcode({OpcodeI, I}).getOpcode() || + I->getParent() != Parent) { + if (NumOpsWithSameOpcodeParent == 0) { + NumOpsWithSameOpcodeParent = 1; + OpcodeI = I; + Parent = I->getParent(); + } else { + --NumOpsWithSameOpcodeParent; + } + } else { + ++NumOpsWithSameOpcodeParent; + } + } + Hash = hash_combine( + Hash, hash_value((OpIdx + 1) * (OpData.V->getValueID() + 1))); + AllUndefs = AllUndefs && isa<UndefValue>(OpData.V); + } + if (AllUndefs) + return {}; + OperandsOrderData Data; + Data.NumOfAPOs = std::max(CntTrue, NumOperands - CntTrue); + Data.NumOpsWithSameOpcodeParent = NumOpsWithSameOpcodeParent; + Data.Hash = Hash; + return Data; } /// Go through the instructions in VL and append their operands. @@ -2876,7 +3018,8 @@ void BoUpSLP::reorderTopToBottom() { // their ordering. DenseMap<const TreeEntry *, OrdersType> GathersToOrders; // Find all reorderable nodes with the given VF. - // Currently the are vectorized loads,extracts + some gathering of extracts. + // Currently the are vectorized stores,loads,extracts + some gathering of + // extracts. for_each(VectorizableTree, [this, &VFToOrderedEntries, &GathersToOrders]( const std::unique_ptr<TreeEntry> &TE) { if (Optional<OrdersType> CurrentOrder = @@ -3497,11 +3640,9 @@ void BoUpSLP::buildTree_rec(ArrayRef<Value *> VL, unsigned Depth, } } - // If any of the scalars is marked as a value that needs to stay scalar, then - // we need to gather the scalars. // The reduction nodes (stored in UserIgnoreList) also should stay scalar. for (Value *V : VL) { - if (MustGather.count(V) || is_contained(UserIgnoreList, V)) { + if (is_contained(UserIgnoreList, V)) { LLVM_DEBUG(dbgs() << "SLP: Gathering due to gathered scalar.\n"); if (TryToFindDuplicates(S)) newTreeEntry(VL, None /*not vectorized*/, S, UserTreeIdx, diff --git a/llvm/test/Transforms/SLPVectorizer/AArch64/transpose-inseltpoison.ll b/llvm/test/Transforms/SLPVectorizer/AArch64/transpose-inseltpoison.ll index fa95ec7357aa..c8aa06677f8f 100644 --- a/llvm/test/Transforms/SLPVectorizer/AArch64/transpose-inseltpoison.ll +++ b/llvm/test/Transforms/SLPVectorizer/AArch64/transpose-inseltpoison.ll @@ -167,25 +167,17 @@ define <4 x i32> @build_vec_v4i32_reuse_1(<2 x i32> %v0, <2 x i32> %v1) { define <4 x i32> @build_vec_v4i32_3_binops(<2 x i32> %v0, <2 x i32> %v1) { ; CHECK-LABEL: @build_vec_v4i32_3_binops( -; CHECK-NEXT: [[V0_0:%.*]] = extractelement <2 x i32> [[V0:%.*]], i64 0 -; CHECK-NEXT: [[V0_1:%.*]] = extractelement <2 x i32> [[V0]], i64 1 -; CHECK-NEXT: [[V1_0:%.*]] = extractelement <2 x i32> [[V1:%.*]], i64 0 -; CHECK-NEXT: [[V1_1:%.*]] = extractelement <2 x i32> [[V1]], i64 1 -; CHECK-NEXT: [[TMP0_0:%.*]] = add i32 [[V0_0]], [[V1_0]] -; CHECK-NEXT: [[TMP0_1:%.*]] = add i32 [[V0_1]], [[V1_1]] -; CHECK-NEXT: [[TMP1_0:%.*]] = mul i32 [[V0_0]], [[V1_0]] -; CHECK-NEXT: [[TMP1_1:%.*]] = mul i32 [[V0_1]], [[V1_1]] -; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i32> [[V0]], [[V1]] -; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <2 x i32> [[TMP1]], <2 x i32> poison, <2 x i32> zeroinitializer -; CHECK-NEXT: [[TMP3:%.*]] = xor <2 x i32> [[V0]], [[V1]] -; CHECK-NEXT: [[TMP4:%.*]] = shufflevector <2 x i32> [[TMP3]], <2 x i32> poison, <2 x i32> <i32 1, i32 1> -; CHECK-NEXT: [[TMP2_0:%.*]] = add i32 [[TMP0_0]], [[TMP0_1]] -; CHECK-NEXT: [[TMP2_1:%.*]] = add i32 [[TMP1_0]], [[TMP1_1]] -; CHECK-NEXT: [[TMP5:%.*]] = add <2 x i32> [[TMP2]], [[TMP4]] -; CHECK-NEXT: [[TMP3_0:%.*]] = insertelement <4 x i32> poison, i32 [[TMP2_0]], i64 0 -; CHECK-NEXT: [[TMP3_1:%.*]] = insertelement <4 x i32> [[TMP3_0]], i32 [[TMP2_1]], i64 1 -; CHECK-NEXT: [[TMP6:%.*]] = shufflevector <2 x i32> [[TMP5]], <2 x i32> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef> -; CHECK-NEXT: [[TMP3_31:%.*]] = shufflevector <4 x i32> [[TMP3_1]], <4 x i32> [[TMP6]], <4 x i32> <i32 0, i32 1, i32 4, i32 5> +; CHECK-NEXT: [[TMP1:%.*]] = add <2 x i32> [[V0:%.*]], [[V1:%.*]] +; CHECK-NEXT: [[TMP2:%.*]] = mul <2 x i32> [[V0]], [[V1]] +; CHECK-NEXT: [[TMP3:%.*]] = shufflevector <2 x i32> [[TMP1]], <2 x i32> [[TMP2]], <2 x i32> <i32 1, i32 2> +; CHECK-NEXT: [[TMP4:%.*]] = shufflevector <2 x i32> [[TMP1]], <2 x i32> [[TMP2]], <2 x i32> <i32 0, i32 3> +; CHECK-NEXT: [[TMP5:%.*]] = xor <2 x i32> [[V0]], [[V1]] +; CHECK-NEXT: [[TMP6:%.*]] = shufflevector <2 x i32> [[TMP5]], <2 x i32> poison, <2 x i32> zeroinitializer +; CHECK-NEXT: [[TMP7:%.*]] = xor <2 x i32> [[V0]], [[V1]] +; CHECK-NEXT: [[TMP8:%.*]] = shufflevector <2 x i32> [[TMP7]], <2 x i32> poison, <2 x i32> <i32 1, i32 1> +; CHECK-NEXT: [[TMP9:%.*]] = add <2 x i32> [[TMP4]], [[TMP3]] +; CHECK-NEXT: [[TMP10:%.*]] = add <2 x i32> [[TMP6]], [[TMP8]] +; CHECK-NEXT: [[TMP3_31:%.*]] = shufflevector <2 x i32> [[TMP9]], <2 x i32> [[TMP10]], <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; CHECK-NEXT: ret <4 x i32> [[TMP3_31]] ; %v0.0 = extractelement <2 x i32> %v0, i32 0 diff --git a/llvm/test/Transforms/SLPVectorizer/AArch64/transpose.ll b/llvm/test/Transforms/SLPVectorizer/AArch64/transpose.ll index dcfdbee9bc5f..307480ce8018 100644 --- a/llvm/test/Transforms/SLPVectorizer/AArch64/transpose.ll +++ b/llvm/test/Transforms/SLPVectorizer/AArch64/transpose.ll @@ -167,25 +167,17 @@ define <4 x i32> @build_vec_v4i32_reuse_1(<2 x i32> %v0, <2 x i32> %v1) { define <4 x i32> @build_vec_v4i32_3_binops(<2 x i32> %v0, <2 x i32> %v1) { ; CHECK-LABEL: @build_vec_v4i32_3_binops( -; CHECK-NEXT: [[V0_0:%.*]] = extractelement <2 x i32> [[V0:%.*]], i64 0 -; CHECK-NEXT: [[V0_1:%.*]] = extractelement <2 x i32> [[V0]], i64 1 -; CHECK-NEXT: [[V1_0:%.*]] = extractelement <2 x i32> [[V1:%.*]], i64 0 -; CHECK-NEXT: [[V1_1:%.*]] = extractelement <2 x i32> [[V1]], i64 1 -; CHECK-NEXT: [[TMP0_0:%.*]] = add i32 [[V0_0]], [[V1_0]] -; CHECK-NEXT: [[TMP0_1:%.*]] = add i32 [[V0_1]], [[V1_1]] -; CHECK-NEXT: [[TMP1_0:%.*]] = mul i32 [[V0_0]], [[V1_0]] -; CHECK-NEXT: [[TMP1_1:%.*]] = mul i32 [[V0_1]], [[V1_1]] -; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i32> [[V0]], [[V1]] -; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <2 x i32> [[TMP1]], <2 x i32> poison, <2 x i32> zeroinitializer -; CHECK-NEXT: [[TMP3:%.*]] = xor <2 x i32> [[V0]], [[V1]] -; CHECK-NEXT: [[TMP4:%.*]] = shufflevector <2 x i32> [[TMP3]], <2 x i32> poison, <2 x i32> <i32 1, i32 1> -; CHECK-NEXT: [[TMP2_0:%.*]] = add i32 [[TMP0_0]], [[TMP0_1]] -; CHECK-NEXT: [[TMP2_1:%.*]] = add i32 [[TMP1_0]], [[TMP1_1]] -; CHECK-NEXT: [[TMP5:%.*]] = add <2 x i32> [[TMP2]], [[TMP4]] -; CHECK-NEXT: [[TMP3_0:%.*]] = insertelement <4 x i32> undef, i32 [[TMP2_0]], i64 0 -; CHECK-NEXT: [[TMP3_1:%.*]] = insertelement <4 x i32> [[TMP3_0]], i32 [[TMP2_1]], i64 1 -; CHECK-NEXT: [[TMP6:%.*]] = shufflevector <2 x i32> [[TMP5]], <2 x i32> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef> -; CHECK-NEXT: [[TMP3_31:%.*]] = shufflevector <4 x i32> [[TMP3_1]], <4 x i32> [[TMP6]], <4 x i32> <i32 0, i32 1, i32 4, i32 5> +; CHECK-NEXT: [[TMP1:%.*]] = add <2 x i32> [[V0:%.*]], [[V1:%.*]] +; CHECK-NEXT: [[TMP2:%.*]] = mul <2 x i32> [[V0]], [[V1]] +; CHECK-NEXT: [[TMP3:%.*]] = shufflevector <2 x i32> [[TMP1]], <2 x i32> [[TMP2]], <2 x i32> <i32 1, i32 2> +; CHECK-NEXT: [[TMP4:%.*]] = shufflevector <2 x i32> [[TMP1]], <2 x i32> [[TMP2]], <2 x i32> <i32 0, i32 3> +; CHECK-NEXT: [[TMP5:%.*]] = xor <2 x i32> [[V0]], [[V1]] +; CHECK-NEXT: [[TMP6:%.*]] = shufflevector <2 x i32> [[TMP5]], <2 x i32> poison, <2 x i32> zeroinitializer +; CHECK-NEXT: [[TMP7:%.*]] = xor <2 x i32> [[V0]], [[V1]] +; CHECK-NEXT: [[TMP8:%.*]] = shufflevector <2 x i32> [[TMP7]], <2 x i32> poison, <2 x i32> <i32 1, i32 1> +; CHECK-NEXT: [[TMP9:%.*]] = add <2 x i32> [[TMP4]], [[TMP3]] +; CHECK-NEXT: [[TMP10:%.*]] = add <2 x i32> [[TMP6]], [[TMP8]] +; CHECK-NEXT: [[TMP3_31:%.*]] = shufflevector <2 x i32> [[TMP9]], <2 x i32> [[TMP10]], <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; CHECK-NEXT: ret <4 x i32> [[TMP3_31]] ; %v0.0 = extractelement <2 x i32> %v0, i32 0 diff --git a/llvm/test/Transforms/SLPVectorizer/AArch64/vectorize-free-extracts-inserts.ll b/llvm/test/Transforms/SLPVectorizer/AArch64/vectorize-free-extracts-inserts.ll index d7ef813d6b72..b79d2d494aa4 100644 --- a/llvm/test/Transforms/SLPVectorizer/AArch64/vectorize-free-extracts-inserts.ll +++ b/llvm/test/Transforms/SLPVectorizer/AArch64/vectorize-free-extracts-inserts.ll @@ -282,19 +282,21 @@ define void @extracts_jumbled_4_lanes(<9 x double>* %ptr.1, <4 x double>* %ptr.2 ; CHECK-NEXT: [[V2_LANE_0:%.*]] = extractelement <4 x double> [[V_2]], i32 0 ; CHECK-NEXT: [[V2_LANE_1:%.*]] = extractelement <4 x double> [[V_2]], i32 1 ; CHECK-NEXT: [[V2_LANE_2:%.*]] = extractelement <4 x double> [[V_2]], i32 2 -; CHECK-NEXT: [[A_LANE_0:%.*]] = fmul double [[V1_LANE_0]], [[V2_LANE_2]] -; CHECK-NEXT: [[A_LANE_1:%.*]] = fmul double [[V1_LANE_2]], [[V2_LANE_1]] -; CHECK-NEXT: [[A_LANE_2:%.*]] = fmul double [[V1_LANE_1]], [[V2_LANE_2]] -; CHECK-NEXT: [[A_LANE_3:%.*]] = fmul double [[V1_LANE_3]], [[V2_LANE_0]] -; CHECK-NEXT: [[A_INS_0:%.*]] = insertelement <9 x double> undef, double [[A_LANE_0]], i32 0 -; CHECK-NEXT: [[A_INS_1:%.*]] = insertelement <9 x double> [[A_INS_0]], double [[A_LANE_1]], i32 1 -; CHECK-NEXT: [[A_INS_2:%.*]] = insertelement <9 x double> [[A_INS_1]], double [[A_LANE_2]], i32 2 -; CHECK-NEXT: [[A_INS_3:%.*]] = insertelement <9 x double> [[A_INS_2]], double [[A_LANE_3]], i32 3 +; CHECK-NEXT: [[TMP0:%.*]] = insertelement <4 x double> poison, double [[V1_LANE_0]], i32 0 +; CHECK-NEXT: [[TMP1:%.*]] = insertelement <4 x double> [[TMP0]], double [[V1_LANE_2]], i32 1 +; CHECK-NEXT: [[TMP2:%.*]] = insertelement <4 x double> [[TMP1]], double [[V1_LANE_1]], i32 2 +; CHECK-NEXT: [[TMP3:%.*]] = insertelement <4 x double> [[TMP2]], double [[V1_LANE_3]], i32 3 +; CHECK-NEXT: [[TMP4:%.*]] = insertelement <4 x double> poison, double [[V2_LANE_2]], i32 0 +; CHECK-NEXT: [[TMP5:%.*]] = insertelement <4 x double> [[TMP4]], double [[V2_LANE_1]], i32 1 +; CHECK-NEXT: [[TMP6:%.*]] = insertelement <4 x double> [[TMP5]], double [[V2_LANE_2]], i32 2 +; CHECK-NEXT: [[TMP7:%.*]] = insertelement <4 x double> [[TMP6]], double [[V2_LANE_0]], i32 3 +; CHECK-NEXT: [[TMP8:%.*]] = fmul <4 x double> [[TMP3]], [[TMP7]] +; CHECK-NEXT: [[TMP9:%.*]] = shufflevector <4 x double> [[TMP8]], <4 x double> poison, <9 x i32> <i32 0, i32 1, i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef> ; CHECK-NEXT: call void @use(double [[V1_LANE_0]]) ; CHECK-NEXT: call void @use(double [[V1_LANE_1]]) ; CHECK-NEXT: call void @use(double [[V1_LANE_2]]) ; CHECK-NEXT: call void @use(double [[V1_LANE_3]]) -; CHECK-NEXT: store <9 x double> [[A_INS_3]], <9 x double>* [[PTR_1]], align 8 +; CHECK-NEXT: store <9 x double> [[TMP9]], <9 x double>* [[PTR_1]], align 8 ; CHECK-NEXT: ret void ; bb: diff --git a/llvm/test/Transforms/SLPVectorizer/X86/PR39774.ll b/llvm/test/Transforms/SLPVectorizer/X86/PR39774.ll index 51a6e1ed81b1..7668747a75ac 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/PR39774.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/PR39774.ll @@ -1,6 +1,6 @@ ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -slp-vectorizer -S < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake -slp-threshold=-6 | FileCheck %s --check-prefix=CHECK -; RUN: opt -slp-vectorizer -S < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake -slp-threshold=-8 -slp-min-tree-size=6 | FileCheck %s --check-prefix=FORCE_REDUCTION +; RUN: opt -slp-vectorizer -S < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake -slp-threshold=-7 -slp-min-tree-size=6 | FileCheck %s --check-prefix=FORCE_REDUCTION define void @Test(i32) { ; CHECK-LABEL: @Test( diff --git a/llvm/test/Transforms/SLPVectorizer/X86/addsub.ll b/llvm/test/Transforms/SLPVectorizer/X86/addsub.ll index c9cb8951e882..ebbbefc9f81f 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/addsub.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/addsub.ll @@ -342,18 +342,18 @@ define void @vec_shuff_reorder() #0 { ; CHECK-LABEL: @vec_shuff_reorder( ; CHECK-NEXT: [[TMP1:%.*]] = load float, float* getelementptr inbounds ([4 x float], [4 x float]* @fb, i32 0, i64 0), align 4 ; CHECK-NEXT: [[TMP2:%.*]] = load float, float* getelementptr inbounds ([4 x float], [4 x float]* @fa, i32 0, i64 0), align 4 -; CHECK-NEXT: [[TMP3:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([4 x float], [4 x float]* @fa, i32 0, i64 1) to <2 x float>*), align 4 -; CHECK-NEXT: [[TMP4:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([4 x float], [4 x float]* @fb, i32 0, i64 1) to <2 x float>*), align 4 -; CHECK-NEXT: [[TMP5:%.*]] = load float, float* getelementptr inbounds ([4 x float], [4 x float]* @fb, i32 0, i64 3), align 4 -; CHECK-NEXT: [[TMP6:%.*]] = load float, float* getelementptr inbounds ([4 x float], [4 x float]* @fa, i32 0, i64 3), align 4 -; CHECK-NEXT: [[TMP7:%.*]] = insertelement <4 x float> poison, float [[TMP2]], i32 0 -; CHECK-NEXT: [[TMP8:%.*]] = shufflevector <2 x float> [[TMP3]], <2 x float> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef> -; CHECK-NEXT: [[TMP9:%.*]] = shufflevector <4 x float> [[TMP7]], <4 x float> [[TMP8]], <4 x i32> <i32 0, i32 4, i32 5, i32 3> -; CHECK-NEXT: [[TMP10:%.*]] = insertelement <4 x float> [[TMP9]], float [[TMP5]], i32 3 -; CHECK-NEXT: [[TMP11:%.*]] = insertelement <4 x float> poison, float [[TMP1]], i32 0 -; CHECK-NEXT: [[TMP12:%.*]] = shufflevector <2 x float> [[TMP4]], <2 x float> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef> -; CHECK-NEXT: [[TMP13:%.*]] = shufflevector <4 x float> [[TMP11]], <4 x float> [[TMP12]], <4 x i32> <i32 0, i32 4, i32 5, i32 3> -; CHECK-NEXT: [[TMP14:%.*]] = insertelement <4 x float> [[TMP13]], float [[TMP6]], i32 3 +; CHECK-NEXT: [[TMP3:%.*]] = load float, float* getelementptr inbounds ([4 x float], [4 x float]* @fa, i32 0, i64 1), align 4 +; CHECK-NEXT: [[TMP4:%.*]] = load float, float* getelementptr inbounds ([4 x float], [4 x float]* @fb, i32 0, i64 1), align 4 +; CHECK-NEXT: [[TMP5:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([4 x float], [4 x float]* @fb, i32 0, i64 2) to <2 x float>*), align 4 +; CHECK-NEXT: [[TMP6:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([4 x float], [4 x float]* @fa, i32 0, i64 2) to <2 x float>*), align 4 +; CHECK-NEXT: [[TMP7:%.*]] = insertelement <4 x float> poison, float [[TMP1]], i32 0 +; CHECK-NEXT: [[TMP8:%.*]] = insertelement <4 x float> [[TMP7]], float [[TMP3]], i32 1 +; CHECK-NEXT: [[TMP9:%.*]] = shufflevector <2 x float> [[TMP5]], <2 x float> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef> +; CHECK-NEXT: [[TMP10:%.*]] = shufflevector <4 x float> [[TMP8]], <4 x float> [[TMP9]], <4 x i32> <i32 0, i32 1, i32 4, i32 5> +; CHECK-NEXT: [[TMP11:%.*]] = insertelement <4 x float> poison, float [[TMP2]], i32 0 +; CHECK-NEXT: [[TMP12:%.*]] = insertelement <4 x float> [[TMP11]], float [[TMP4]], i32 1 +; CHECK-NEXT: [[TMP13:%.*]] = shufflevector <2 x float> [[TMP6]], <2 x float> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef> +; CHECK-NEXT: [[TMP14:%.*]] = shufflevector <4 x float> [[TMP12]], <4 x float> [[TMP13]], <4 x i32> <i32 0, i32 1, i32 4, i32 5> ; CHECK-NEXT: [[TMP15:%.*]] = fadd <4 x float> [[TMP10]], [[TMP14]] ; CHECK-NEXT: [[TMP16:%.*]] = fsub <4 x float> [[TMP10]], [[TMP14]] ; CHECK-NEXT: [[TMP17:%.*]] = shufflevector <4 x float> [[TMP15]], <4 x float> [[TMP16]], <4 x i32> <i32 0, i32 5, i32 2, i32 7> diff --git a/llvm/test/Transforms/SLPVectorizer/X86/commutativity.ll b/llvm/test/Transforms/SLPVectorizer/X86/commutativity.ll index d23dc9b1d822..1a218ae02aef 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/commutativity.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/commutativity.ll @@ -16,21 +16,21 @@ define void @splat(i8 %a, i8 %b, i8 %c) { ; SSE-LABEL: @splat( -; SSE-NEXT: [[TMP1:%.*]] = insertelement <16 x i8> poison, i8 [[C:%.*]], i32 0 -; SSE-NEXT: [[SHUFFLE:%.*]] = shufflevector <16 x i8> [[TMP1]], <16 x i8> poison, <16 x i32> zeroinitializer -; SSE-NEXT: [[TMP2:%.*]] = insertelement <16 x i8> poison, i8 [[A:%.*]], i32 0 -; SSE-NEXT: [[TMP3:%.*]] = insertelement <16 x i8> [[TMP2]], i8 [[B:%.*]], i32 1 -; SSE-NEXT: [[SHUFFLE1:%.*]] = shufflevector <16 x i8> [[TMP3]], <16 x i8> poison, <16 x i32> <i32 0, i32 0, i32 0, i32 0, i32 0, i32 1, i32 0, i32 1, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0> +; SSE-NEXT: [[TMP1:%.*]] = insertelement <16 x i8> poison, i8 [[A:%.*]], i32 0 +; SSE-NEXT: [[TMP2:%.*]] = insertelement <16 x i8> [[TMP1]], i8 [[B:%.*]], i32 1 +; SSE-NEXT: [[SHUFFLE:%.*]] = shufflevector <16 x i8> [[TMP2]], <16 x i8> poison, <16 x i32> <i32 0, i32 0, i32 0, i32 0, i32 0, i32 1, i32 0, i32 1, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0> +; SSE-NEXT: [[TMP3:%.*]] = insertelement <16 x i8> poison, i8 [[C:%.*]], i32 0 +; SSE-NEXT: [[SHUFFLE1:%.*]] = shufflevector <16 x i8> [[TMP3]], <16 x i8> poison, <16 x i32> zeroinitializer ; SSE-NEXT: [[TMP4:%.*]] = xor <16 x i8> [[SHUFFLE]], [[SHUFFLE1]] ; SSE-NEXT: store <16 x i8> [[TMP4]], <16 x i8>* bitcast ([32 x i8]* @cle to <16 x i8>*), align 16 ; SSE-NEXT: ret void ; ; AVX-LABEL: @splat( -; AVX-NEXT: [[TMP1:%.*]] = insertelement <16 x i8> poison, i8 [[C:%.*]], i32 0 -; AVX-NEXT: [[SHUFFLE:%.*]] = shufflevector <16 x i8> [[TMP1]], <16 x i8> poison, <16 x i32> zeroinitializer -; AVX-NEXT: [[TMP2:%.*]] = insertelement <16 x i8> poison, i8 [[A:%.*]], i32 0 -; AVX-NEXT: [[TMP3:%.*]] = insertelement <16 x i8> [[TMP2]], i8 [[B:%.*]], i32 1 -; AVX-NEXT: [[SHUFFLE1:%.*]] = shufflevector <16 x i8> [[TMP3]], <16 x i8> poison, <16 x i32> <i32 0, i32 0, i32 0, i32 0, i32 0, i32 1, i32 0, i32 1, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0> +; AVX-NEXT: [[TMP1:%.*]] = insertelement <16 x i8> poison, i8 [[A:%.*]], i32 0 +; AVX-NEXT: [[TMP2:%.*]] = insertelement <16 x i8> [[TMP1]], i8 [[B:%.*]], i32 1 +; AVX-NEXT: [[SHUFFLE:%.*]] = shufflevector <16 x i8> [[TMP2]], <16 x i8> poison, <16 x i32> <i32 0, i32 0, i32 0, i32 0, i32 0, i32 1, i32 0, i32 1, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0> +; AVX-NEXT: [[TMP3:%.*]] = insertelement <16 x i8> poison, i8 [[C:%.*]], i32 0 +; AVX-NEXT: [[SHUFFLE1:%.*]] = shufflevector <16 x i8> [[TMP3]], <16 x i8> poison, <16 x i32> zeroinitializer ; AVX-NEXT: [[TMP4:%.*]] = xor <16 x i8> [[SHUFFLE]], [[SHUFFLE1]] ; AVX-NEXT: store <16 x i8> [[TMP4]], <16 x i8>* bitcast ([32 x i8]* @cle to <16 x i8>*), align 16 ; AVX-NEXT: ret void diff --git a/llvm/test/Transforms/SLPVectorizer/X86/crash_exceed_scheduling.ll b/llvm/test/Transforms/SLPVectorizer/X86/crash_exceed_scheduling.ll index 6be7dda2375d..098b83bb0259 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/crash_exceed_scheduling.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/crash_exceed_scheduling.ll @@ -34,9 +34,9 @@ define void @exceed(double %0, double %1) { ; CHECK-NEXT: [[TMP11:%.*]] = fadd fast <2 x double> [[TMP3]], [[TMP5]] ; CHECK-NEXT: [[TMP12:%.*]] = fmul fast <2 x double> [[TMP10]], [[TMP11]] ; CHECK-NEXT: [[IXX101:%.*]] = fsub double undef, undef -; CHECK-NEXT: [[TMP13:%.*]] = insertelement <2 x double> <double poison, double undef>, double [[TMP7]], i32 0 -; CHECK-NEXT: [[TMP14:%.*]] = insertelement <2 x double> <double undef, double poison>, double [[TMP1]], i32 1 -; CHECK-NEXT: [[TMP15:%.*]] = fmul fast <2 x double> [[TMP13]], [[TMP14]] +; CHECK-NEXT: [[TMP13:%.*]] = insertelement <2 x double> poison, double [[TMP1]], i32 1 +; CHECK-NEXT: [[TMP14:%.*]] = insertelement <2 x double> [[TMP13]], double [[TMP7]], i32 0 +; CHECK-NEXT: [[TMP15:%.*]] = fmul fast <2 x double> [[TMP14]], undef ; CHECK-NEXT: switch i32 undef, label [[BB1:%.*]] [ ; CHECK-NEXT: i32 0, label [[BB2:%.*]] ; CHECK-NEXT: ] diff --git a/llvm/test/Transforms/SLPVectorizer/X86/crash_smallpt.ll b/llvm/test/Transforms/SLPVectorizer/X86/crash_smallpt.ll index c8beac34fc90..9c8fbf8a2ed9 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/crash_smallpt.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/crash_smallpt.ll @@ -30,15 +30,19 @@ define void @main() #0 { ; CHECK-NEXT: br i1 undef, label [[COND_TRUE63_US:%.*]], label [[COND_FALSE66_US:%.*]] ; CHECK: cond.false66.us: ; CHECK-NEXT: [[ADD_I276_US:%.*]] = fadd double 0.000000e+00, undef -; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x double> <double poison, double undef>, double [[ADD_I276_US]], i32 0 -; CHECK-NEXT: [[TMP1:%.*]] = fadd <2 x double> [[TMP0]], <double 0.000000e+00, double 0xBFA5CC2D1960285F> +; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x double> <double poison, double 0xBFA5CC2D1960285F>, double [[ADD_I276_US]], i32 0 +; CHECK-NEXT: [[TMP1:%.*]] = fadd <2 x double> <double 0.000000e+00, double undef>, [[TMP0]] ; CHECK-NEXT: [[TMP2:%.*]] = fmul <2 x double> [[TMP1]], <double 1.400000e+02, double 1.400000e+02> ; CHECK-NEXT: [[TMP3:%.*]] = fadd <2 x double> [[TMP2]], <double 5.000000e+01, double 5.200000e+01> -; CHECK-NEXT: [[TMP4:%.*]] = fmul <2 x double> undef, [[TMP1]] -; CHECK-NEXT: [[TMP5:%.*]] = bitcast double* [[AGG_TMP99208_SROA_0_0_IDX]] to <2 x double>* -; CHECK-NEXT: store <2 x double> [[TMP3]], <2 x double>* [[TMP5]], align 8 -; CHECK-NEXT: [[TMP6:%.*]] = bitcast double* [[AGG_TMP101211_SROA_0_0_IDX]] to <2 x double>* -; CHECK-NEXT: store <2 x double> [[TMP4]], <2 x double>* [[TMP6]], align 8 +; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x double> [[TMP1]], i32 0 +; CHECK-NEXT: [[TMP5:%.*]] = extractelement <2 x double> [[TMP1]], i32 1 +; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x double> <double poison, double undef>, double [[TMP4]], i32 0 +; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x double> <double undef, double poison>, double [[TMP5]], i32 1 +; CHECK-NEXT: [[TMP8:%.*]] = fmul <2 x double> [[TMP6]], [[TMP7]] +; CHECK-NEXT: [[TMP9:%.*]] = bitcast double* [[AGG_TMP99208_SROA_0_0_IDX]] to <2 x double>* +; CHECK-NEXT: store <2 x double> [[TMP3]], <2 x double>* [[TMP9]], align 8 +; CHECK-NEXT: [[TMP10:%.*]] = bitcast double* [[AGG_TMP101211_SROA_0_0_IDX]] to <2 x double>* +; CHECK-NEXT: store <2 x double> [[TMP8]], <2 x double>* [[TMP10]], align 8 ; CHECK-NEXT: unreachable ; CHECK: cond.true63.us: ; CHECK-NEXT: unreachable diff --git a/llvm/test/Transforms/SLPVectorizer/X86/extractelement.ll b/llvm/test/Transforms/SLPVectorizer/X86/extractelement.ll index 0a0c0e6763fd..1fff6841a538 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/extractelement.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/extractelement.ll @@ -85,7 +85,7 @@ define float @f_used_twice_in_tree(<2 x float> %x) { ; THRESH1-NEXT: [[TMP1:%.*]] = extractelement <2 x float> [[X:%.*]], i32 1 ; THRESH1-NEXT: [[TMP2:%.*]] = insertelement <2 x float> poison, float [[TMP1]], i32 0 ; THRESH1-NEXT: [[TMP3:%.*]] = insertelement <2 x float> [[TMP2]], float [[TMP1]], i32 1 -; THRESH1-NEXT: [[TMP4:%.*]] = fmul <2 x float> [[X]], [[TMP3]] +; THRESH1-NEXT: [[TMP4:%.*]] = fmul <2 x float> [[TMP3]], [[X]] ; THRESH1-NEXT: [[TMP5:%.*]] = extractelement <2 x float> [[TMP4]], i32 0 ; THRESH1-NEXT: [[TMP6:%.*]] = extractelement <2 x float> [[TMP4]], i32 1 ; THRESH1-NEXT: [[ADD:%.*]] = fadd float [[TMP5]], [[TMP6]] @@ -95,7 +95,7 @@ define float @f_used_twice_in_tree(<2 x float> %x) { ; THRESH2-NEXT: [[TMP1:%.*]] = extractelement <2 x float> [[X:%.*]], i32 1 ; THRESH2-NEXT: [[TMP2:%.*]] = insertelement <2 x float> poison, float [[TMP1]], i32 0 ; THRESH2-NEXT: [[TMP3:%.*]] = insertelement <2 x float> [[TMP2]], float [[TMP1]], i32 1 -; THRESH2-NEXT: [[TMP4:%.*]] = fmul <2 x float> [[X]], [[TMP3]] +; THRESH2-NEXT: [[TMP4:%.*]] = fmul <2 x float> [[TMP3]], [[X]] ; THRESH2-NEXT: [[TMP5:%.*]] = extractelement <2 x float> [[TMP4]], i32 0 ; THRESH2-NEXT: [[TMP6:%.*]] = extractelement <2 x float> [[TMP4]], i32 1 ; THRESH2-NEXT: [[ADD:%.*]] = fadd float [[TMP5]], [[TMP6]] diff --git a/llvm/test/Transforms/SLPVectorizer/X86/insert-shuffle.ll b/llvm/test/Transforms/SLPVectorizer/X86/insert-shuffle.ll index 2c983a353623..7d43465eecf8 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/insert-shuffle.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/insert-shuffle.ll @@ -11,25 +11,23 @@ define { <2 x float>, <2 x float> } @foo(%struct.sw* %v) { ; CHECK-NEXT: [[Y:%.*]] = getelementptr inbounds [[STRUCT_SW]], %struct.sw* [[V]], i64 0, i32 1 ; CHECK-NEXT: [[TMP1:%.*]] = bitcast float* [[X]] to <2 x float>* ; CHECK-NEXT: [[TMP2:%.*]] = load <2 x float>, <2 x float>* [[TMP1]], align 16 +; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x float> [[TMP2]], <2 x float> poison, <4 x i32> <i32 1, i32 0, i32 0, i32 1> ; CHECK-NEXT: [[TMP3:%.*]] = load float, float* undef, align 4 -; CHECK-NEXT: [[TMP4:%.*]] = insertelement <4 x float> <float poison, float undef, float poison, float poison>, float [[TMP0]], i32 0 -; CHECK-NEXT: [[TMP5:%.*]] = shufflevector <2 x float> [[TMP2]], <2 x float> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef> -; CHECK-NEXT: [[TMP6:%.*]] = shufflevector <4 x float> [[TMP4]], <4 x float> [[TMP5]], <4 x i32> <i32 0, i32 1, i32 4, i32 5> -; CHECK-NEXT: [[TMP7:%.*]] = shufflevector <2 x float> [[TMP2]], <2 x float> poison, <4 x i32> <i32 1, i32 0, i32 undef, i32 undef> -; CHECK-NEXT: [[TMP8:%.*]] = shufflevector <4 x float> poison, <4 x float> [[TMP7]], <4 x i32> <i32 4, i32 5, i32 2, i32 3> -; CHECK-NEXT: [[TMP9:%.*]] = insertelement <4 x float> [[TMP8]], float [[TMP3]], i32 2 -; CHECK-NEXT: [[TMP10:%.*]] = fmul <4 x float> [[TMP6]], [[TMP9]] -; CHECK-NEXT: [[TMP11:%.*]] = fadd <4 x float> poison, [[TMP10]] -; CHECK-NEXT: [[TMP12:%.*]] = fadd <4 x float> [[TMP11]], poison -; CHECK-NEXT: [[TMP13:%.*]] = fadd <4 x float> [[TMP12]], poison -; CHECK-NEXT: [[TMP14:%.*]] = extractelement <4 x float> [[TMP13]], i32 0 -; CHECK-NEXT: [[VEC1:%.*]] = insertelement <2 x float> undef, float [[TMP14]], i32 0 -; CHECK-NEXT: [[TMP15:%.*]] = extractelement <4 x float> [[TMP13]], i32 1 -; CHECK-NEXT: [[VEC2:%.*]] = insertelement <2 x float> [[VEC1]], float [[TMP15]], i32 1 -; CHECK-NEXT: [[TMP16:%.*]] = extractelement <4 x float> [[TMP13]], i32 2 -; CHECK-NEXT: [[VEC3:%.*]] = insertelement <2 x float> undef, float [[TMP16]], i32 0 -; CHECK-NEXT: [[TMP17:%.*]] = extractelement <4 x float> [[TMP13]], i32 3 -; CHECK-NEXT: [[VEC4:%.*]] = insertelement <2 x float> [[VEC3]], float [[TMP17]], i32 1 +; CHECK-NEXT: [[TMP4:%.*]] = insertelement <4 x float> poison, float [[TMP0]], i32 0 +; CHECK-NEXT: [[TMP5:%.*]] = insertelement <4 x float> [[TMP4]], float [[TMP3]], i32 1 +; CHECK-NEXT: [[SHUFFLE1:%.*]] = shufflevector <4 x float> [[TMP5]], <4 x float> poison, <4 x i32> <i32 0, i32 undef, i32 1, i32 undef> +; CHECK-NEXT: [[TMP6:%.*]] = fmul <4 x float> [[SHUFFLE]], [[SHUFFLE1]] +; CHECK-NEXT: [[TMP7:%.*]] = fadd <4 x float> poison, [[TMP6]] +; CHECK-NEXT: [[TMP8:%.*]] = fadd <4 x float> [[TMP7]], poison +; CHECK-NEXT: [[TMP9:%.*]] = fadd <4 x float> [[TMP8]], poison +; CHECK-NEXT: [[TMP10:%.*]] = extractelement <4 x float> [[TMP9]], i32 0 +; CHECK-NEXT: [[VEC1:%.*]] = insertelement <2 x float> undef, float [[TMP10]], i32 0 +; CHECK-NEXT: [[TMP11:%.*]] = extractelement <4 x float> [[TMP9]], i32 1 +; CHECK-NEXT: [[VEC2:%.*]] = insertelement <2 x float> [[VEC1]], float [[TMP11]], i32 1 +; CHECK-NEXT: [[TMP12:%.*]] = extractelement <4 x float> [[TMP9]], i32 2 +; CHECK-NEXT: [[VEC3:%.*]] = insertelement <2 x float> undef, float [[TMP12]], i32 0 +; CHECK-NEXT: [[TMP13:%.*]] = extractelement <4 x float> [[TMP9]], i32 3 +; CHECK-NEXT: [[VEC4:%.*]] = insertelement <2 x float> [[VEC3]], float [[TMP13]], i32 1 ; CHECK-NEXT: [[INS1:%.*]] = insertvalue { <2 x float>, <2 x float> } undef, <2 x float> [[VEC2]], 0 ; CHECK-NEXT: [[INS2:%.*]] = insertvalue { <2 x float>, <2 x float> } [[INS1]], <2 x float> [[VEC4]], 1 ; CHECK-NEXT: ret { <2 x float>, <2 x float> } [[INS2]] diff --git a/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll b/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll index 96502d44acee..ba3bd26d3861 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll @@ -37,7 +37,7 @@ define void @lookahead_basic(double* %array) { ; CHECK-NEXT: [[TMP7:%.*]] = load <2 x double>, <2 x double>* [[TMP6]], align 8 ; CHECK-NEXT: [[TMP8:%.*]] = fsub fast <2 x double> [[TMP1]], [[TMP3]] ; CHECK-NEXT: [[TMP9:%.*]] = fsub fast <2 x double> [[TMP5]], [[TMP7]] -; CHECK-NEXT: [[TMP10:%.*]] = fadd fast <2 x double> [[TMP8]], [[TMP9]] +; CHECK-NEXT: [[TMP10:%.*]] = fadd fast <2 x double> [[TMP9]], [[TMP8]] ; CHECK-NEXT: [[TMP11:%.*]] = bitcast double* [[IDX0]] to <2 x double>* ; CHECK-NEXT: store <2 x double> [[TMP10]], <2 x double>* [[TMP11]], align 8 ; CHECK-NEXT: ret void @@ -175,7 +175,7 @@ define void @lookahead_alt2(double* %array) { ; CHECK-NEXT: [[TMP11:%.*]] = fadd fast <2 x double> [[TMP1]], [[TMP3]] ; CHECK-NEXT: [[TMP12:%.*]] = fsub fast <2 x double> [[TMP1]], [[TMP3]] ; CHECK-NEXT: [[TMP13:%.*]] = shufflevector <2 x double> [[TMP11]], <2 x double> [[TMP12]], <2 x i32> <i32 0, i32 3> -; CHECK-NEXT: [[TMP14:%.*]] = fadd fast <2 x double> [[TMP13]], [[TMP10]] +; CHECK-NEXT: [[TMP14:%.*]] = fadd fast <2 x double> [[TMP10]], [[TMP13]] ; CHECK-NEXT: [[TMP15:%.*]] = bitcast double* [[IDX0]] to <2 x double>* ; CHECK-NEXT: store <2 x double> [[TMP14]], <2 x double>* [[TMP15]], align 8 ; CHECK-NEXT: ret void @@ -237,28 +237,29 @@ define void @lookahead_external_uses(double* %A, double *%B, double *%C, double ; CHECK-NEXT: [[IDXB2:%.*]] = getelementptr inbounds double, double* [[B]], i64 2 ; CHECK-NEXT: [[IDXA2:%.*]] = getelementptr inbounds double, double* [[A]], i64 2 ; CHECK-NEXT: [[IDXB1:%.*]] = getelementptr inbounds double, double* [[B]], i64 1 -; CHECK-NEXT: [[A0:%.*]] = load double, double* [[IDXA0]], align 8 +; CHECK-NEXT: [[B0:%.*]] = load double, double* [[IDXB0]], align 8 ; CHECK-NEXT: [[C0:%.*]] = load double, double* [[IDXC0]], align 8 ; CHECK-NEXT: [[D0:%.*]] = load double, double* [[IDXD0]], align 8 -; CHECK-NEXT: [[A1:%.*]] = load double, double* [[IDXA1]], align 8 +; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[IDXA0]] to <2 x double>* +; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 8 ; CHECK-NEXT: [[B2:%.*]] = load double, double* [[IDXB2]], align 8 ; CHECK-NEXT: [[A2:%.*]] = load double, double* [[IDXA2]], align 8 -; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[IDXB0]] to <2 x double>* -; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 8 -; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[C0]], i32 0 -; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> [[TMP2]], double [[A1]], i32 1 -; CHECK-NEXT: [[TMP4:%.*]] = insertelement <2 x double> poison, double [[D0]], i32 0 -; CHECK-NEXT: [[TMP5:%.*]] = insertelement <2 x double> [[TMP4]], double [[B2]], i32 1 -; CHECK-NEXT: [[TMP6:%.*]] = fsub fast <2 x double> [[TMP3]], [[TMP5]] -; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x double> poison, double [[A0]], i32 0 -; CHECK-NEXT: [[TMP8:%.*]] = insertelement <2 x double> [[TMP7]], double [[A2]], i32 1 -; CHECK-NEXT: [[TMP9:%.*]] = fsub fast <2 x double> [[TMP8]], [[TMP1]] -; CHECK-NEXT: [[TMP10:%.*]] = fadd fast <2 x double> [[TMP9]], [[TMP6]] +; CHECK-NEXT: [[B1:%.*]] = load double, double* [[IDXB1]], align 8 +; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[B0]], i32 0 +; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> [[TMP2]], double [[B2]], i32 1 +; CHECK-NEXT: [[TMP4:%.*]] = fsub fast <2 x double> [[TMP1]], [[TMP3]] +; CHECK-NEXT: [[TMP5:%.*]] = insertelement <2 x double> poison, double [[C0]], i32 0 +; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x double> [[TMP5]], double [[A2]], i32 1 +; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x double> poison, double [[D0]], i32 0 +; CHECK-NEXT: [[TMP8:%.*]] = insertelement <2 x double> [[TMP7]], double [[B1]], i32 1 +; CHECK-NEXT: [[TMP9:%.*]] = fsub fast <2 x double> [[TMP6]], [[TMP8]] +; CHECK-NEXT: [[TMP10:%.*]] = fadd fast <2 x double> [[TMP4]], [[TMP9]] ; CHECK-NEXT: [[IDXS0:%.*]] = getelementptr inbounds double, double* [[S:%.*]], i64 0 ; CHECK-NEXT: [[IDXS1:%.*]] = getelementptr inbounds double, double* [[S]], i64 1 ; CHECK-NEXT: [[TMP11:%.*]] = bitcast double* [[IDXS0]] to <2 x double>* ; CHECK-NEXT: store <2 x double> [[TMP10]], <2 x double>* [[TMP11]], align 8 -; CHECK-NEXT: store double [[A1]], double* [[EXT1:%.*]], align 8 +; CHECK-NEXT: [[TMP12:%.*]] = extractelement <2 x double> [[TMP1]], i32 1 +; CHECK-NEXT: store double [[TMP12]], double* [[EXT1:%.*]], align 8 ; CHECK-NEXT: ret void ; entry: @@ -607,7 +608,7 @@ define void @ChecksExtractScores_different_vectors(double* %storeArray, double* ; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x double> poison, double [[EXTRA0]], i32 0 ; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x double> [[TMP6]], double [[EXTRB1]], i32 1 ; CHECK-NEXT: [[TMP8:%.*]] = fmul <2 x double> [[TMP7]], [[TMP2]] -; CHECK-NEXT: [[TMP9:%.*]] = fadd <2 x double> [[TMP8]], [[SHUFFLE]] +; CHECK-NEXT: [[TMP9:%.*]] = fadd <2 x double> [[SHUFFLE]], [[TMP8]] ; CHECK-NEXT: [[SIDX0:%.*]] = getelementptr inbounds double, double* [[STOREARRAY:%.*]], i64 0 ; CHECK-NEXT: [[SIDX1:%.*]] = getelementptr inbounds double, double* [[STOREARRAY]], i64 1 ; CHECK-NEXT: [[TMP10:%.*]] = bitcast double* [[SIDX0]] to <2 x double>* diff --git a/llvm/test/Transforms/SLPVectorizer/X86/operandorder.ll b/llvm/test/Transforms/SLPVectorizer/X86/operandorder.ll index a0554d7c5a81..125cd23d0140 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/operandorder.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/operandorder.ll @@ -142,16 +142,13 @@ define void @shuffle_nodes_match1(double * noalias %from, double * noalias %to, ; CHECK-NEXT: br label [[LP:%.*]] ; CHECK: lp: ; CHECK-NEXT: [[P:%.*]] = phi double [ 1.000000e+00, [[LP]] ], [ 0.000000e+00, [[ENTRY:%.*]] ] -; CHECK-NEXT: [[FROM_1:%.*]] = getelementptr double, double* [[FROM:%.*]], i32 1 -; CHECK-NEXT: [[V0_1:%.*]] = load double, double* [[FROM]], align 4 -; CHECK-NEXT: [[V0_2:%.*]] = load double, double* [[FROM_1]], align 4 -; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x double> poison, double [[V0_2]], i64 0 -; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x double> [[TMP0]], double [[P]], i64 1 -; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[V0_1]], i64 0 -; CHECK-NEXT: [[TMP3:%.*]] = shufflevector <2 x double> [[TMP2]], <2 x double> poison, <2 x i32> zeroinitializer -; CHECK-NEXT: [[TMP4:%.*]] = fadd <2 x double> [[TMP1]], [[TMP3]] -; CHECK-NEXT: [[TMP5:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* -; CHECK-NEXT: store <2 x double> [[TMP4]], <2 x double>* [[TMP5]], align 4 +; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[FROM:%.*]] to <2 x double>* +; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 4 +; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x double> [[TMP1]], <2 x double> poison, <2 x i32> <i32 1, i32 0> +; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> [[TMP1]], double [[P]], i64 1 +; CHECK-NEXT: [[TMP3:%.*]] = fadd <2 x double> [[TMP2]], [[SHUFFLE]] +; CHECK-NEXT: [[TMP4:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* +; CHECK-NEXT: store <2 x double> [[TMP3]], <2 x double>* [[TMP4]], align 4 ; CHECK-NEXT: br i1 undef, label [[LP]], label [[EXT:%.*]] ; CHECK: ext: ; CHECK-NEXT: ret void @@ -183,11 +180,11 @@ define void @vecload_vs_broadcast4(double * noalias %from, double * noalias %to, ; CHECK-NEXT: [[P:%.*]] = phi double [ 1.000000e+00, [[LP]] ], [ 0.000000e+00, [[ENTRY:%.*]] ] ; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[FROM:%.*]] to <2 x double>* ; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 4 +; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x double> [[TMP1]], <2 x double> poison, <2 x i32> <i32 1, i32 0> ; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> [[TMP1]], double [[P]], i64 1 -; CHECK-NEXT: [[TMP3:%.*]] = shufflevector <2 x double> [[TMP1]], <2 x double> poison, <2 x i32> <i32 1, i32 0> -; CHECK-NEXT: [[TMP4:%.*]] = fadd <2 x double> [[TMP2]], [[TMP3]] -; CHECK-NEXT: [[TMP5:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* -; CHECK-NEXT: store <2 x double> [[TMP4]], <2 x double>* [[TMP5]], align 4 +; CHECK-NEXT: [[TMP3:%.*]] = fadd <2 x double> [[TMP2]], [[SHUFFLE]] +; CHECK-NEXT: [[TMP4:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* +; CHECK-NEXT: store <2 x double> [[TMP3]], <2 x double>* [[TMP4]], align 4 ; CHECK-NEXT: br i1 undef, label [[LP]], label [[EXT:%.*]] ; CHECK: ext: ; CHECK-NEXT: ret void @@ -218,16 +215,13 @@ define void @shuffle_nodes_match2(double * noalias %from, double * noalias %to, ; CHECK-NEXT: br label [[LP:%.*]] ; CHECK: lp: ; CHECK-NEXT: [[P:%.*]] = phi double [ 1.000000e+00, [[LP]] ], [ 0.000000e+00, [[ENTRY:%.*]] ] -; CHECK-NEXT: [[FROM_1:%.*]] = getelementptr double, double* [[FROM:%.*]], i32 1 -; CHECK-NEXT: [[V0_1:%.*]] = load double, double* [[FROM]], align 4 -; CHECK-NEXT: [[V0_2:%.*]] = load double, double* [[FROM_1]], align 4 -; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x double> poison, double [[V0_1]], i64 0 -; CHECK-NEXT: [[TMP1:%.*]] = shufflevector <2 x double> [[TMP0]], <2 x double> poison, <2 x i32> zeroinitializer -; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[V0_2]], i64 0 -; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> [[TMP2]], double [[P]], i64 1 -; CHECK-NEXT: [[TMP4:%.*]] = fadd <2 x double> [[TMP1]], [[TMP3]] -; CHECK-NEXT: [[TMP5:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* -; CHECK-NEXT: store <2 x double> [[TMP4]], <2 x double>* [[TMP5]], align 4 +; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[FROM:%.*]] to <2 x double>* +; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 4 +; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x double> [[TMP1]], <2 x double> poison, <2 x i32> <i32 1, i32 0> +; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> [[TMP1]], double [[P]], i64 1 +; CHECK-NEXT: [[TMP3:%.*]] = fadd <2 x double> [[SHUFFLE]], [[TMP2]] +; CHECK-NEXT: [[TMP4:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* +; CHECK-NEXT: store <2 x double> [[TMP3]], <2 x double>* [[TMP4]], align 4 ; CHECK-NEXT: br i1 undef, label [[LP]], label [[EXT:%.*]] ; CHECK: ext: ; CHECK-NEXT: ret void @@ -348,7 +342,7 @@ define void @load_reorder_double(double* nocapture %c, double* noalias nocapture ; CHECK-NEXT: [[TMP2:%.*]] = load <2 x double>, <2 x double>* [[TMP1]], align 4 ; CHECK-NEXT: [[TMP3:%.*]] = bitcast double* [[A:%.*]] to <2 x double>* ; CHECK-NEXT: [[TMP4:%.*]] = load <2 x double>, <2 x double>* [[TMP3]], align 4 -; CHECK-NEXT: [[TMP5:%.*]] = fadd <2 x double> [[TMP4]], [[TMP2]] +; CHECK-NEXT: [[TMP5:%.*]] = fadd <2 x double> [[TMP2]], [[TMP4]] ; CHECK-NEXT: [[TMP6:%.*]] = bitcast double* [[C:%.*]] to <2 x double>* ; CHECK-NEXT: store <2 x double> [[TMP5]], <2 x double>* [[TMP6]], align 4 ; CHECK-NEXT: ret void diff --git a/llvm/test/Transforms/SLPVectorizer/X86/store-jumbled.ll b/llvm/test/Transforms/SLPVectorizer/X86/store-jumbled.ll index ced403ae5375..19f654e5a4f8 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/store-jumbled.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/store-jumbled.ll @@ -22,9 +22,9 @@ define i32 @jumbled-load(i32* noalias nocapture %in, i32* noalias nocapture %inn ; CHECK-NEXT: [[GEP_8:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 1 ; CHECK-NEXT: [[GEP_9:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 2 ; CHECK-NEXT: [[GEP_10:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 3 -; CHECK-NEXT: [[REORDER_SHUFFLE:%.*]] = shufflevector <4 x i32> [[TMP5]], <4 x i32> poison, <4 x i32> <i32 1, i32 3, i32 0, i32 2> +; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <4 x i32> [[TMP5]], <4 x i32> poison, <4 x i32> <i32 1, i32 3, i32 0, i32 2> ; CHECK-NEXT: [[TMP6:%.*]] = bitcast i32* [[GEP_7]] to <4 x i32>* -; CHECK-NEXT: store <4 x i32> [[REORDER_SHUFFLE]], <4 x i32>* [[TMP6]], align 4 +; CHECK-NEXT: store <4 x i32> [[SHUFFLE]], <4 x i32>* [[TMP6]], align 4 ; CHECK-NEXT: ret i32 undef ; %in.addr = getelementptr inbounds i32, i32* %in, i64 0 diff --git a/llvm/test/Transforms/SLPVectorizer/X86/stores_vectorize.ll b/llvm/test/Transforms/SLPVectorizer/X86/stores_vectorize.ll index 9983578a7058..65d1fce9e130 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/stores_vectorize.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/stores_vectorize.ll @@ -97,9 +97,9 @@ define void @store_reverse(i64* %p3) { ; CHECK-NEXT: [[TMP3:%.*]] = load <4 x i64>, <4 x i64>* [[TMP2]], align 8 ; CHECK-NEXT: [[TMP4:%.*]] = shl <4 x i64> [[TMP1]], [[TMP3]] ; CHECK-NEXT: [[ARRAYIDX14:%.*]] = getelementptr inbounds i64, i64* [[P3]], i64 4 -; CHECK-NEXT: [[TMP5:%.*]] = shufflevector <4 x i64> [[TMP4]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0> -; CHECK-NEXT: [[TMP6:%.*]] = bitcast i64* [[ARRAYIDX14]] to <4 x i64>* -; CHECK-NEXT: store <4 x i64> [[TMP5]], <4 x i64>* [[TMP6]], align 8 +; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <4 x i64> [[TMP4]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0> +; CHECK-NEXT: [[TMP5:%.*]] = bitcast i64* [[ARRAYIDX14]] to <4 x i64>* +; CHECK-NEXT: store <4 x i64> [[SHUFFLE]], <4 x i64>* [[TMP5]], align 8 ; CHECK-NEXT: ret void ; entry: diff --git a/llvm/test/Transforms/SLPVectorizer/X86/supernode.ll b/llvm/test/Transforms/SLPVectorizer/X86/supernode.ll index bf98a148e9dc..f1ff95b51f8b 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/supernode.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/supernode.ll @@ -23,7 +23,7 @@ define void @test_supernode_add(double* %Aarray, double* %Barray, double *%Carra ; ENABLED-NEXT: [[C1:%.*]] = load double, double* [[IDXC1]], align 8 ; ENABLED-NEXT: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[A0]], i32 0 ; ENABLED-NEXT: [[TMP3:%.*]] = insertelement <2 x double> [[TMP2]], double [[C1]], i32 1 -; ENABLED-NEXT: [[TMP4:%.*]] = fadd fast <2 x double> [[TMP3]], [[TMP1]] +; ENABLED-NEXT: [[TMP4:%.*]] = fadd fast <2 x double> [[TMP1]], [[TMP3]] ; ENABLED-NEXT: [[TMP5:%.*]] = insertelement <2 x double> poison, double [[C0]], i32 0 ; ENABLED-NEXT: [[TMP6:%.*]] = insertelement <2 x double> [[TMP5]], double [[A1]], i32 1 ; ENABLED-NEXT: [[TMP7:%.*]] = fadd fast <2 x double> [[TMP4]], [[TMP6]] </cut>

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