re PR tree-optimization/55687 (ICE in hide_evolution_in_other_loops_than_loop, at tree-chrec.c:716)

2012-12-14  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/55687
	* tree-chrec.h (no_evolution_in_loop_p): Properly use
	tree_contains_chrecs.

	* gcc.dg/torture/pr55687.c: New testcase.

From-SVN: r194498

gcc/ChangeLog

+2012-12-14  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/55687
+	* tree-chrec.h (no_evolution_in_loop_p): Properly use
+	tree_contains_chrecs.
+
 2012-12-13  Richard Henderson  <rth@redhat.com>
 
 	PR middle-end/55492

gcc/testsuite/ChangeLog

+2012-12-14  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/55687
+	* gcc.dg/torture/pr55687.c: New testcase.
+
 2012-12-13  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/55652

gcc/testsuite/gcc.dg/torture/pr55687.c

+/* { dg-do compile } */
+
+typedef struct _IO_FILE FILE;
+typedef short gshort;
+typedef struct _GString GString;
+
+extern char *fgets(char *, int, FILE *);
+
+void verbose_text_loop (void *data)
+{
+  FILE *dev_vcs;
+  char buf[81];
+  GString *buf_str;
+  gshort i, j;
+  while (1)      
+    {
+      for (i = 1; i <= 7; i++)
+	{
+	  while (fgets (buf, 81, dev_vcs))
+	    {
+	      for (j = 0;   j < __builtin_strlen (buf);   j++)
+		if (buf[j] != ' ')    
+		  break;   
+	      for (;   j < __builtin_strlen (buf);   j++)
+		g_string_append_c_inline (buf_str, buf[j]); 
+	    }
+	}
+    }
+}

gcc/tree-chrec.h

@@ -117,7 +117,7 @@ no_evolution_in_loop_p (tree chrec, unsigned loop_num, bool *res)
 
   STRIP_NOPS (chrec);
   scev = hide_evolution_in_other_loops_than_loop (chrec, loop_num);
-  *res = !tree_is_chrec (scev);
+  *res = !tree_contains_chrecs (scev, NULL);
   return true;
 }