r190561 - in /trunk/gcc: ChangeLog fold-const.c...

[glisse@gcc.gnu.org]

Author: glisse
Date: Tue Aug 21 13:27:00 2012
New Revision: 190561

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190561
Log:
2012-08-21  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* fold-const.c (fold_ternary_loc): Detect identity permutations.
	Canonicalize permutations more.
	* tree-ssa-forwprop.c (is_combined_permutation_identity): New function.
	(simplify_permutation): Likewise.
	(ssa_forward_propagate_and_combine): Call it.

gcc/testsuite/
	* gcc.dg/tree-ssa/forwprop-19.c: New testcase.
	* gcc.dg/fold-perm.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/fold-perm.c   (with props)
    trunk/gcc/testsuite/gcc.dg/tree-ssa/forwprop-19.c   (with props)
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-forwprop.c

Propchange: trunk/gcc/testsuite/gcc.dg/fold-perm.c
            ('svn:eol-style' added)

Propchange: trunk/gcc/testsuite/gcc.dg/fold-perm.c
            ('svn:keywords' added)

Propchange: trunk/gcc/testsuite/gcc.dg/tree-ssa/forwprop-19.c
            ('svn:eol-style' added)

Propchange: trunk/gcc/testsuite/gcc.dg/tree-ssa/forwprop-19.c
            ('svn:keywords' added)