[Bug tree-optimization/92157] [10 Regression] incorrect strcmp() == 0 result for unknown strings
msebor at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Fri Oct 18 22:27:00 GMT 2019
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92157
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Oct 18 22:26:39 2019
New Revision: 277194
URL: https://gcc.gnu.org/viewcvs?rev=277194&root=gcc&view=rev
Log:
PR tree-optimization/92157 - incorrect strcmp() == 0 result for unknown strings
gcc/testsuite/ChangeLog:
PR tree-optimization/92157
* gcc.dg/strlenopt-69.c: Disable test failing due to PR 92155.
* gcc.dg/strlenopt-87.c: New test.
gcc/ChangeLog:
PR tree-optimization/92157
* tree-ssa-strlen.c (handle_builtin_string_cmp): Be prepared for
compute_string_length to return a negative result.
Added:
trunk/gcc/testsuite/gcc.dg/strlenopt-87.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/strlenopt-69.c
trunk/gcc/tree-ssa-strlen.c
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