re PR middle-end/67133 (ICE at -Os and above on x86_64-linux-gnu in gimple_op, at gimple.h:2274)

	PR middle-end/67133
	* gimple.c (infer_nonnull_range_by_attribute): Check that the
	nonnull argument position is not outside function arguments.

	* gcc.dg/torture/pr67133.c: New test.

From-SVN: r226896

gcc/ChangeLog

+2015-08-14  Marek Polacek  <polacek@redhat.com>
+
+	PR middle-end/67133
+	* gimple.c (infer_nonnull_range_by_attribute): Check that the
+	nonnull argument position is not outside function arguments.
+
 2015-08-14  Matthew Wahab  <matthew.wahab@arm.com>
 
 	PR target/67143

gcc/gimple.c

@@ -2694,10 +2694,13 @@ infer_nonnull_range_by_attribute (gimple stmt, tree op)
 	  /* Now see if op appears in the nonnull list.  */
 	  for (tree t = TREE_VALUE (attrs); t; t = TREE_CHAIN (t))
 	    {
-	      int idx = TREE_INT_CST_LOW (TREE_VALUE (t)) - 1;
-	      tree arg = gimple_call_arg (stmt, idx);
-	      if (operand_equal_p (op, arg, 0))
-		return true;
+	      unsigned int idx = TREE_INT_CST_LOW (TREE_VALUE (t)) - 1;
+	      if (idx < gimple_call_num_args (stmt))
+		{
+		  tree arg = gimple_call_arg (stmt, idx);
+		  if (operand_equal_p (op, arg, 0))
+		    return true;
+		}
 	    }
 	}
     }

gcc/testsuite/ChangeLog

+2015-08-14  Marek Polacek  <polacek@redhat.com>
+
+	PR middle-end/67133
+	* gcc.dg/torture/pr67133.c: New test.
+
 2015-08-14  Matthew Wahab  <matthew.wahab@arm.com>
 	    Matthias Klose  <doko@debian.org>
 

gcc/testsuite/gcc.dg/torture/pr67133.c

+/* { dg-do compile } */
+/* { dg-additional-options "-fisolate-erroneous-paths-attribute" } */
+
+int printf (const char *, ...);
+int foo (int);
+
+int a, *b, c;
+
+static int
+fn1 ()
+{ 
+  if (a)
+    return (a = 0);
+  for (; a; )
+    a = 0;
+  return 0;
+}
+
+static int
+fn2 (int p)
+{ 
+  fn1 ();
+  c = 0;
+  if (p)
+    printf ("%d", 0);
+  foo (b != &p);
+  return 0;
+}
+
+void
+fn3 ()
+{ 
+  fn2 (0);
+}