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Summary of changes: gcc/ChangeLog | 40 + gcc/builtins.c | 259 ++++--- gcc/builtins.h | 8 +- gcc/testsuite/ChangeLog | 19 + gcc/testsuite/c-c++-common/Wrestrict.c | 10 +- .../c-c++-common/Wstringop-truncation-4.c | 18 +- gcc/testsuite/c-c++-common/Wstringop-truncation.c | 3 +- gcc/testsuite/g++.dg/warn/Wstringop-overflow-3.C | 18 +- gcc/testsuite/gcc.dg/Warray-bounds-46.c | 2 +- gcc/testsuite/gcc.dg/Warray-bounds-47.c | 2 +- .../{Warray-bounds-53.c => Warray-bounds-52.c} | 6 +- gcc/testsuite/gcc.dg/Wstringop-overflow-27.c | 293 ++++++++ gcc/testsuite/gcc.dg/Wstringop-overflow-28.c | 236 ++++++ gcc/testsuite/gcc.dg/Wstringop-overflow-29.c | 66 ++ gcc/testsuite/gcc.dg/attr-alloc_size.c | 8 +- gcc/testsuite/gcc.dg/attr-copy-2.c | 4 +- gcc/testsuite/gcc.dg/builtin-stringop-chk-5.c | 4 +- gcc/testsuite/gcc.dg/strlenopt-86.c | 12 +- gcc/testsuite/gcc.target/i386/pr82002-1.c | 2 + gcc/tree-ssa-strlen.c | 822 ++++++++++++++------- gcc/tree-ssa-strlen.h | 4 +- gcc/tree.c | 8 +- 22 files changed, 1449 insertions(+), 395 deletions(-) copy gcc/testsuite/gcc.dg/{Warray-bounds-53.c => Warray-bounds-52.c} (92%) create mode 100644 gcc/testsuite/gcc.dg/Wstringop-overflow-27.c create mode 100644 gcc/testsuite/gcc.dg/Wstringop-overflow-28.c create mode 100644 gcc/testsuite/gcc.dg/Wstringop-overflow-29.c