re PR tree-optimization/60902 (ffmpeg built with gcc 4.9 RC produces incorrect flac...

	PR tree-optimization/60902
	* tree-ssa-threadedge.c
	(record_temporary_equivalences_from_stmts_at_dest): Only iterate
	over real defs when invalidating outputs from statements that do not
	produce useful outputs for threading.

From-SVN: r209860

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 61fd558d29de79ec0b6becba22c87b9a73278116..89930b0042c246fb044bdc0b45d72842fd7da515 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2014-04-28  Jeff Law  <law@redhat.com>
+
+       PR tree-optimization/60902
+       * tree-ssa-threadedge.c
+       (record_temporary_equivalences_from_stmts_at_dest): Only iterate
+       over real defs when invalidating outputs from statements that do not
+       produce useful outputs for threading.
+
 2014-04-28  Richard Biener  <rguenther@suse.de>
 
        PR tree-optimization/60979

diff --git a/gcc/tree-ssa-threadedge.c b/gcc/tree-ssa-threadedge.c
index 8a0103b1637fae9bced979223972426e0c08bc8e..7621348944f3e38a37599678b48f9bffd5dc5da6 100644 (file)
--- a/gcc/tree-ssa-threadedge.c
+++ b/gcc/tree-ssa-threadedge.c
@@ -398,7 +398,7 @@ record_temporary_equivalences_from_stmts_at_dest (edge e,
          ssa_op_iter iter;
 
          if (backedge_seen)
-           FOR_EACH_SSA_TREE_OPERAND (op, stmt, iter, SSA_OP_ALL_DEFS)
+           FOR_EACH_SSA_TREE_OPERAND (op, stmt, iter, SSA_OP_DEF)
              {
                /* This call only invalidates equivalences created by
                   PHI nodes.  This is by design to keep the cost of