r197449 - in /branches/gcc-4_6-branch/gcc: Chan...

[jakub@gcc.gnu.org]

Author: jakub
Date: Wed Apr  3 18:02:57 2013
New Revision: 197449

URL: http://gcc.gnu.org/viewcvs?rev=197449&root=gcc&view=rev
Log:
	Backported from mainline
	2013-01-25  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/56098
	* tree-ssa-phiopt.c (nt_init_block): Don't call add_or_mark_expr
	for stmts with volatile ops.
	(cond_store_replacement): Don't optimize if assign has volatile ops.
	(cond_if_else_store_replacement_1): Don't optimize if either
	then_assign or else_assign have volatile ops.

	* gcc.dg/pr56098-1.c: New test.

Added:
    branches/gcc-4_6-branch/gcc/testsuite/gcc.dg/pr56098-1.c
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_6-branch/gcc/tree-ssa-phiopt.c