From: vries <vries@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 2 May 2016 07:42:06 +0000 (+0000)
Subject: Fix ICE in dump_pred_graph
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=773d09b9806434d1b85ad83aeff110aac6ea888a;p=thirdparty%2Fgcc.git

Fix ICE in dump_pred_graph

2016-05-02  Marek Polacek  <polacek@redhat.com>
	    Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/70700
	* tree-ssa-structalias.c (dump_pred_graph): Fix getting varinfo for ids
	bigger than FIRST_REF_NODE.

	* gcc.dg/pr70700.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@235700 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e88ca467c596..b2a7a2389181 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2016-05-02  Marek Polacek  <polacek@redhat.com>
+	    Tom de Vries  <tom@codesourcery.com>
+
+	PR tree-optimization/70700
+	* tree-ssa-structalias.c (dump_pred_graph): Fix getting varinfo for ids
+	bigger than FIRST_REF_NODE.
+
 2016-05-02  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	PR target/52898
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index cee09bc12510..c4f45fa8b6c2 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2016-05-02  Marek Polacek  <polacek@redhat.com>
+	    Tom de Vries  <tom@codesourcery.com>
+
+	PR tree-optimization/70700
+	* gcc.dg/pr70700.c: New test.
+
 2016-05-01  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.target/i386/avx256-unaligned-load-1.c: Update scan strings.
diff --git a/gcc/testsuite/gcc.dg/pr70700.c b/gcc/testsuite/gcc.dg/pr70700.c
new file mode 100644
index 000000000000..613cd29fc1f1
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr70700.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O3 -fdump-tree-ealias-graph" } */
+
+struct S
+{
+  long m;
+};
+
+struct S
+fn1 (struct S *a)
+{
+  if (a->m)
+    a->m |= 2;
+  return *a;
+}
diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c
index 0a4149489a9e..d66bdfa94ce5 100644
--- a/gcc/tree-ssa-structalias.c
+++ b/gcc/tree-ssa-structalias.c
@@ -2241,7 +2241,11 @@ dump_pred_graph (struct scc_info *si, FILE *file)
       if (graph->points_to[i]
 	  && !bitmap_empty_p (graph->points_to[i]))
 	{
-	  fprintf (file, "[label=\"%s = {", get_varinfo (i)->name);
+	  if (i < FIRST_REF_NODE)
+	    fprintf (file, "[label=\"%s = {", get_varinfo (i)->name);
+	  else
+	    fprintf (file, "[label=\"*%s = {",
+		     get_varinfo (i - FIRST_REF_NODE)->name);
 	  unsigned j;
 	  bitmap_iterator bi;
 	  EXECUTE_IF_SET_IN_BITMAP (graph->points_to[i], 0, j, bi)