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[Bug tree-optimization/83075] [8 Regression] Invalid strncpy optimization
- 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, 06 Dec 2017 17:48:17 +0000
- Subject: [Bug tree-optimization/83075] [8 Regression] Invalid strncpy optimization
- Auto-submitted: auto-generated
- References: <bug-83075-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83075
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed Dec 6 17:47:45 2017
New Revision: 255446
URL: https://gcc.gnu.org/viewcvs?rev=255446&root=gcc&view=rev
Log:
PR tree-optimization/83075 - Invalid strncpy optimization
gcc/ChangeLog:
PR tree-optimization/83075
* tree-ssa-strlen.c (handle_builtin_stxncpy): Avoid assuming
strncat/strncpy don't change length of source string.
gcc/testsuite/ChangeLog:
PR tree-optimization/83075
* gcc.dg/tree-ssa/strncat.c: New test.
* gcc.dg/tree-ssa/strncpy-2.c: Same.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/strncat.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/strncpy-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-strlen.c