r173948 - in /trunk/gcc: ChangeLog gimple-fold....

[jakub@gcc.gnu.org]

Author: jakub
Date: Fri May 20 14:19:05 2011
New Revision: 173948

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173948
Log:
	PR tree-optimization/49073
	* gimple-fold.c (and_comparisons_1, or_comparisons_1): Return
	NULL if PHI argument is SSA_NAME, whose def_stmt is dominated
	by the PHI.
	* tree-ssa-ifcombine.c (tree_ssa_ifcombine): Calculate dominators.

	* gcc.c-torture/execute/pr49073.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr49073.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ifcombine.c