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from 0d344b55760 aarch64: Fix pac-ret with unusual dwarf in libgcc unwinder [...] new a1c9f779f75 Add GIMPLE switch support to loop unswitching

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Summary of changes: gcc/dbgcnt.def | 1 + gcc/doc/invoke.texi | 3 - gcc/params.opt | 4 - gcc/testsuite/gcc.dg/alias-10.c | 2 +- gcc/testsuite/gcc.dg/loop-unswitch-1.c | 2 +- gcc/testsuite/gcc.dg/loop-unswitch-10.c | 56 ++ gcc/testsuite/gcc.dg/loop-unswitch-11.c | 45 ++ gcc/testsuite/gcc.dg/loop-unswitch-12.c | 28 + gcc/testsuite/gcc.dg/loop-unswitch-13.c | 35 + gcc/testsuite/gcc.dg/loop-unswitch-14.c | 60 ++ gcc/testsuite/gcc.dg/loop-unswitch-15.c | 15 + gcc/testsuite/gcc.dg/loop-unswitch-16.c | 22 + gcc/testsuite/gcc.dg/loop-unswitch-17.c | 24 + gcc/testsuite/gcc.dg/loop-unswitch-7.c | 28 + gcc/testsuite/gcc.dg/loop-unswitch-8.c | 31 + gcc/testsuite/gcc.dg/loop-unswitch-9.c | 27 + gcc/testsuite/gcc.dg/torture/20220518-1.c | 39 ++ gcc/testsuite/gcc.dg/torture/20220518-2.c | 14 + gcc/testsuite/gcc.dg/torture/20220525-1.c | 33 + gcc/testsuite/gcc.dg/tree-ssa/loop-6.c | 2 +- gcc/tree-cfg.cc | 7 +- gcc/tree-ssa-loop-unswitch.cc | 1062 ++++++++++++++++++++++------- 22 files changed, 1288 insertions(+), 252 deletions(-) create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-10.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-11.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-12.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-13.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-14.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-15.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-16.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-17.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-7.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-8.c create mode 100644 gcc/testsuite/gcc.dg/loop-unswitch-9.c create mode 100644 gcc/testsuite/gcc.dg/torture/20220518-1.c create mode 100644 gcc/testsuite/gcc.dg/torture/20220518-2.c create mode 100644 gcc/testsuite/gcc.dg/torture/20220525-1.c