diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a3412c90029..50d13cb2fe3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-04-21  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/70747
+	* fold-const.c (fold_comparison): Return properly typed
+	constant boolean.
+
 2016-04-21  Bin Cheng  <bin.cheng@arm.com>
 
 	PR tree-optimization/70715
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 0f4bf7eca6b..9514c71c629 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -8676,11 +8676,11 @@ fold_comparison (location_t loc, enum tree_code code, tree type,
 	    case EQ_EXPR:
 	    case LE_EXPR:
 	    case LT_EXPR:
-	      return boolean_false_node;
+	      return constant_boolean_node (false, type);
 	    case GE_EXPR:
 	    case GT_EXPR:
 	    case NE_EXPR:
-	      return boolean_true_node;
+	      return constant_boolean_node (true, type);
 	    default:
 	      gcc_unreachable ();
 	    }
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7a17aa2ebb6..2af83c29205 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2016-04-21  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/70747
+	* gcc.dg/pr70747.c: New testcase.
+
 2016-04-21  Bin Cheng  <bin.cheng@arm.com>
 
 	PR tree-optimization/70715
diff --git a/gcc/testsuite/gcc.dg/pr70747.c b/gcc/testsuite/gcc.dg/pr70747.c
new file mode 100644
index 00000000000..0fca7ebd97f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr70747.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-pedantic" } */
+
+int *a, b;
+
+void fn1 ()
+{
+  a = __builtin_malloc (sizeof(int)*2); 
+  b = &a[1] == (0, 0); /* { dg-warning "comparison between pointer and integer" } */
+}