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[Bug tree-optimization/80934] bzero should be assumed not to escape pointer argument
- 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: Fri, 16 Jun 2017 20:52:35 +0000
- Subject: [Bug tree-optimization/80934] bzero should be assumed not to escape pointer argument
- Auto-submitted: auto-generated
- References: <bug-80934-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80934
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Jun 16 20:52:03 2017
New Revision: 249278
URL: https://gcc.gnu.org/viewcvs?rev=249278&root=gcc&view=rev
Log:
PR tree-optimization/80934 - bzero should be assumed not to escape pointer
argument
PR tree-optimization/80933 - redundant bzero/bcopy calls not eliminated
gcc/ChangeLog:
PR tree-optimization/80933
PR tree-optimization/80934
* builtins.c (fold_builtin_3): Do not handle bcmp here.
* gimple-fold.c (gimple_fold_builtin_bcmp): New function.
(gimple_fold_builtin_bcopy, gimple_fold_builtin_bzero): Likewise.
(gimple_fold_builtin): Call them.
gcc/testsuite/ChangeLog:
PR tree-optimization/80933
PR tree-optimization/80934
* gcc.dg/fold-bcopy.c: New test.
* gcc.dg/tree-ssa/ssa-dse-30.c: Likewise..
* gcc.dg/tree-ssa/alias-36.c: Likewise.
* gcc/testsuite/gcc.dg/pr79214.c: Adjust.
* gcc.dg/tree-prof/val-prof-7.c: Likewise.
* gcc.dg/Wsizeof-pointer-memaccess1.c: Likewise.
* gcc.dg/builtins-nonnull.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/fold-bcopy.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/alias-36.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-30.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/gimple-fold.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/Wsizeof-pointer-memaccess1.c
trunk/gcc/testsuite/gcc.dg/builtins-nonnull.c
trunk/gcc/testsuite/gcc.dg/pr79214.c
trunk/gcc/testsuite/gcc.dg/tree-prof/val-prof-7.c