re PR tree-optimization/77677 (ICE at -O1 and above in both 32-bit and 64-bit…

re PR tree-optimization/77677 (ICE at -O1 and above in both 32-bit and 64-bit modes on x86_64-linux-gnu (internal compiler error: in set_value_range, at tree-vrp.c:361))

2016-09-22  Richard Biener  <rguenther@suse.de>

	PR middle-end/77677
	* gimple-match-head.c (gimple_resimplify1): Drop TREE_OVERFLOW
	from constant folding results.
	(gimple_resimplify2): Likewise.
	(gimple_resimplify3): Likewise.

From-SVN: r240352

gcc/ChangeLog

 2016-09-22  Richard Biener  <rguenther@suse.de>
 
+	PR middle-end/77677
+	* gimple-match-head.c (gimple_resimplify1): Drop TREE_OVERFLOW
+	from constant folding results.
+	(gimple_resimplify2): Likewise.
+	(gimple_resimplify3): Likewise.
+
+2016-09-22  Richard Biener  <rguenther@suse.de>
+
 	PR middle-end/77678
 	* expr.c (expand_expr_real_1): Guard array access against negative
 	offset.

gcc/gimple-match-head.c

@@ -89,6 +89,8 @@ gimple_resimplify1 (gimple_seq *seq,
       if (tem != NULL_TREE
 	  && CONSTANT_CLASS_P (tem))
 	{
+	  if (TREE_OVERFLOW_P (tem))
+	    tem = drop_tree_overflow (tem);
 	  res_ops[0] = tem;
 	  res_ops[1] = NULL_TREE;
 	  res_ops[2] = NULL_TREE;
@@ -134,6 +136,8 @@ gimple_resimplify2 (gimple_seq *seq,
       if (tem != NULL_TREE
 	  && CONSTANT_CLASS_P (tem))
 	{
+	  if (TREE_OVERFLOW_P (tem))
+	    tem = drop_tree_overflow (tem);
 	  res_ops[0] = tem;
 	  res_ops[1] = NULL_TREE;
 	  res_ops[2] = NULL_TREE;
@@ -194,6 +198,8 @@ gimple_resimplify3 (gimple_seq *seq,
       if (tem != NULL_TREE
 	  && CONSTANT_CLASS_P (tem))
 	{
+	  if (TREE_OVERFLOW_P (tem))
+	    tem = drop_tree_overflow (tem);
 	  res_ops[0] = tem;
 	  res_ops[1] = NULL_TREE;
 	  res_ops[2] = NULL_TREE;