r249278 - in /trunk/gcc: ChangeLog builtins.c g...

[msebor@gcc.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