r184061 - in /branches/gcc-4_6-branch/gcc: Chan...

[jakub@gcc.gnu.org]

Author: jakub
Date: Thu Feb  9 17:29:38 2012
New Revision: 184061

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184061
Log:
	Backported from mainline
	2012-02-07  Jakub Jelinek  <jakub@redhat.com>

	PR rtl-optimization/52060
	* combine.c (try_combine): Add i0src_copy and i0src_copy2 variables,
	copy i1src to i1src_copy whenever added_sets_2 && i1_feeds_i2_n already
	before i1dest -> i1src substitution in newpat, copy i0src to i0src_copy
	and/or i0src_copy2 when needed.

	* gcc.dg/torture/pr52060.c: New test.

Added:
    branches/gcc-4_6-branch/gcc/testsuite/gcc.dg/torture/pr52060.c
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/combine.c
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog