diff mbox series

Fix PR83685

Message ID alpine.LSU.2.20.1801081419540.32271@zhemvz.fhfr.qr
State New
Headers show
Series Fix PR83685 | expand

Commit Message

Richard Biener Jan. 8, 2018, 1:20 p.m. UTC 
Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

2018-01-08  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83685
	* tree-ssa-pre.c (create_expression_by_pieces): Do not insert
	references to abnormals.

	* gcc.dg/torture/pr83685.c: New testcase.
diff mbox series

Patch

Index: gcc/tree-ssa-pre.c
===================================================================
--- gcc/tree-ssa-pre.c	(revision 256329)
+++ gcc/tree-ssa-pre.c	(working copy)
@@ -2697,6 +2697,8 @@  create_expression_by_pieces (basic_block
        that value numbering saw through.  */
     case NAME:
       folded = PRE_EXPR_NAME (expr);
+      if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (folded))
+	return NULL_TREE;
       if (useless_type_conversion_p (exprtype, TREE_TYPE (folded)))
 	return folded;
       break;
Index: gcc/testsuite/gcc.dg/torture/pr83685.c
===================================================================
--- gcc/testsuite/gcc.dg/torture/pr83685.c	(nonexistent)
+++ gcc/testsuite/gcc.dg/torture/pr83685.c	(working copy)
@@ -0,0 +1,20 @@ 
+/* { dg-do compile }  */
+
+int _setjmp (void *);
+void foo (int);
+
+void
+bar (int e, int b, char c, void *d)
+{
+  while (b)
+    {
+      if (_setjmp (d))
+	foo (e);
+      if (c)
+	{
+	  e--;
+	  foo (0);
+	}
+      e++;
+    }
+}