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[Bug tree-optimization/83698] bogus offset in -Wrestrict messages for strcat of unknown strings
- From: "msebor at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 14 Feb 2018 23:22:47 +0000
- Subject: [Bug tree-optimization/83698] bogus offset in -Wrestrict messages for strcat of unknown strings
- Auto-submitted: auto-generated
- References: <bug-83698-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83698
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Feb 14 23:22:15 2018
New Revision: 257676
URL: https://gcc.gnu.org/viewcvs?rev=257676&root=gcc&view=rev
Log:
PR tree-optimization/83698 - bogus offset in -Wrestrict messages for strcat of
unknown strings
gcc/ChangeLog:
PR tree-optimization/83698
* gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): For
arrays constrain the offset range to their bounds.
(builtin_access::strcat_overlap): Adjust the bounds of overlap offset.
(builtin_access::overlap): Avoid setting the size of overlap if it's
already been set.
(maybe_diag_overlap): Also consider arrays when deciding what values
of offsets to include in diagnostics.
gcc/testsuite/ChangeLog:
PR tree-optimization/83698
* gcc.dg/Wrestrict-7.c: New test.
* c-c++-common/Wrestrict.c: Adjust expected values for strcat.
* gcc.target/i386/chkp-stropt-17.c: Same.
Added:
trunk/gcc/testsuite/gcc.dg/Wrestrict-7.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-warn-restrict.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/Wrestrict.c
trunk/gcc/testsuite/gcc.target/i386/chkp-stropt-17.c