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from 4911609fbe4 middle-end/103851 - ensure SSA names are released during OM [...] new 6362627b27f i386, fab: Optimize __atomic_{add,sub,and,or,xor}_fetch (x, [...]

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Summary of changes: gcc/builtins.c | 87 ++++++++ gcc/builtins.h | 1 + gcc/config/i386/sync.md | 104 +++++++++ gcc/doc/md.texi | 24 ++ gcc/internal-fn.c | 40 ++++ gcc/internal-fn.def | 5 + gcc/internal-fn.h | 9 + gcc/optabs.def | 5 + gcc/testsuite/gcc.target/i386/pr98737-1.c | 207 ++++++++++++++++++ gcc/testsuite/gcc.target/i386/pr98737-2.c | 111 ++++++++++ gcc/testsuite/gcc.target/i386/pr98737-3.c | 207 ++++++++++++++++++ gcc/testsuite/gcc.target/i386/pr98737-4.c | 111 ++++++++++ gcc/testsuite/gcc.target/i386/pr98737-5.c | 303 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/i386/pr98737-6.c | 303 ++++++++++++++++++++++++++ gcc/testsuite/gcc.target/i386/pr98737-7.c | 303 ++++++++++++++++++++++++++ gcc/tree-ssa-ccp.c | 349 +++++++++++++++++++++++++++--- 16 files changed, 2133 insertions(+), 36 deletions(-) create mode 100644 gcc/testsuite/gcc.target/i386/pr98737-1.c create mode 100644 gcc/testsuite/gcc.target/i386/pr98737-2.c create mode 100644 gcc/testsuite/gcc.target/i386/pr98737-3.c create mode 100644 gcc/testsuite/gcc.target/i386/pr98737-4.c create mode 100644 gcc/testsuite/gcc.target/i386/pr98737-5.c create mode 100644 gcc/testsuite/gcc.target/i386/pr98737-6.c create mode 100644 gcc/testsuite/gcc.target/i386/pr98737-7.c