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from e12cf2ce124 PR driver/80545 - option -Wstringop-overflow not recognized [...] new 3b96aff0edd PR tree-optimization/91457 - inconsistent warning for writi [...]

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Summary of changes: gcc/ChangeLog | 12 + gcc/builtins.c | 113 ++++++- gcc/builtins.h | 2 +- gcc/testsuite/ChangeLog | 8 + gcc/testsuite/c-c++-common/Wstringop-overflow-2.c | 348 +++++++++++++++++++ gcc/testsuite/g++.dg/warn/Warray-bounds-8.C | 388 ++++++++++++++++++++++ gcc/testsuite/g++.dg/warn/Wstringop-overflow-3.C | 386 +++++++++++++++++++++ gcc/testsuite/gcc.dg/Wstringop-overflow-15.c | 62 ++++ gcc/tree-ssa-strlen.c | 34 +- gcc/tree-vrp.c | 57 ++-- 10 files changed, 1365 insertions(+), 45 deletions(-) create mode 100644 gcc/testsuite/c-c++-common/Wstringop-overflow-2.c create mode 100644 gcc/testsuite/g++.dg/warn/Warray-bounds-8.C create mode 100644 gcc/testsuite/g++.dg/warn/Wstringop-overflow-3.C create mode 100644 gcc/testsuite/gcc.dg/Wstringop-overflow-15.c