From: Richard Biener <rguenther@suse.de>
Date: Mon, 8 Jan 2018 13:22:56 +0000 (+0000)
Subject: re PR tree-optimization/83685 (ICE: SSA corruption)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e207c07997748ec104a1caf295e66abb75f0eb3f;p=gcc.git

re PR tree-optimization/83685 (ICE: SSA corruption)

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.

From-SVN: r256339
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0c9d6947d68..cbd431aed83 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+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.
+
 2018-01-08  Richard Biener  <rguenther@suse.de>
 
 	PR lto/83719
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ccc94d1b2a6..25f82aea1f6 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-01-08  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/83685
+	* gcc.dg/torture/pr83685.c: New testcase.
+
 2018-01-08  Richard Biener  <rguenther@suse.de>
 
 	PR lto/83719
diff --git a/gcc/testsuite/gcc.dg/torture/pr83685.c b/gcc/testsuite/gcc.dg/torture/pr83685.c
new file mode 100644
index 00000000000..062f75d23e9
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr83685.c
@@ -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++;
+    }
+}
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c
index 63c2a6a209b..55295e171e9 100644
--- a/gcc/tree-ssa-pre.c
+++ b/gcc/tree-ssa-pre.c
@@ -2697,6 +2697,8 @@ create_expression_by_pieces (basic_block block, pre_expr expr,
        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;