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from 2b37969 Fix gcc.dg/torture/pr77937-[12].c for real. new ff16a80 PR65122 extended alignment support in allocators new ac8a4f8 Fold __builtin_str{n}{case}cmp functions new 507a998 Fold __builtin_memchr function new 3b7a15a Test folding of str{n}{case}cmp and memchr

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Summary of changes: gcc/ChangeLog | 23 ++ gcc/builtins.c | 197 ++------------- gcc/builtins.h | 1 + gcc/fold-const-call.c | 76 +++++- gcc/fold-const-call.h | 1 + gcc/gimple-fold.c | 266 +++++++++++++++++++-- gcc/testsuite/ChangeLog | 6 + .../gcc.dg/tree-ssa/builtins-folding-generic.c | 76 ++++++ .../gcc.dg/tree-ssa/builtins-folding-gimple-ub.c | 23 ++ .../gcc.dg/tree-ssa/builtins-folding-gimple.c | 161 +++++++++++++ libstdc++-v3/ChangeLog | 25 +- libstdc++-v3/include/ext/bitmap_allocator.h | 18 ++ libstdc++-v3/include/ext/malloc_allocator.h | 25 +- libstdc++-v3/include/ext/mt_allocator.h | 18 ++ libstdc++-v3/include/ext/new_allocator.h | 18 +- libstdc++-v3/include/ext/pool_allocator.h | 18 +- .../dr2127.cc => allocator/overaligned.cc} | 26 +- .../bitmap_allocator/overaligned.cc} | 28 ++- .../testsuite/ext/malloc_allocator/overaligned.cc | 68 ++++++ .../dr2127.cc => ext/mt_allocator/overaligned.cc} | 28 ++- .../dr2127.cc => ext/new_allocator/overaligned.cc} | 28 ++- .../pool_allocator/overaligned.cc} | 28 ++- 22 files changed, 884 insertions(+), 274 deletions(-) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/builtins-folding-generic.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/builtins-folding-gimple-ub.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/builtins-folding-gimple.c copy libstdc++-v3/testsuite/20_util/{raw_storage_iterator/dr2127.cc => allocator/o [...] copy libstdc++-v3/testsuite/{20_util/raw_storage_iterator/dr2127.cc => ext/bitmap_ [...] create mode 100644 libstdc++-v3/testsuite/ext/malloc_allocator/overaligned.cc copy libstdc++-v3/testsuite/{20_util/raw_storage_iterator/dr2127.cc => ext/mt_allo [...] copy libstdc++-v3/testsuite/{20_util/raw_storage_iterator/dr2127.cc => ext/new_all [...] copy libstdc++-v3/testsuite/{20_util/raw_storage_iterator/dr2127.cc => ext/pool_al [...]