diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 457c3385f8754b34657f212e223d2c590c68f754..38ae32110db492b6fda6db6d7ab925d02d9682a3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-10-11  Jan Hubicka  <hubicka@ucw.cz>
+
+	* fold-const.c (operand_equal_p): Add code matching empty
+	constructors.
+
 2015-10-21  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* tree.def (CEIL_DIV_EXPR, FLOOR_DIV_EXPR, ROUND_DIV_EXPR): Tweak
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index b7874a08c0b62acab3762d085de13f223557eb03..602ea240cb4b148442890fff3b0358556f87d4ff 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -2891,6 +2891,11 @@ operand_equal_p (const_tree arg0, const_tree arg1, unsigned int flags)
 	return operand_equal_p (TREE_OPERAND (arg0, 0), TREE_OPERAND (arg1, 0),
 				flags | OEP_ADDRESS_OF
 				| OEP_CONSTANT_ADDRESS_OF);
+      case CONSTRUCTOR:
+	/* In GIMPLE empty constructors are allowed in initializers of
+	   aggregates.  */
+	return (!vec_safe_length (CONSTRUCTOR_ELTS (arg0))
+		&& !vec_safe_length (CONSTRUCTOR_ELTS (arg1)));
       default:
 	break;
       }
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9c76295c91689b74f21d6103d79448bce244912a..4637ae747e2059a2e273f7582128879ef4c5a6a3 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-10-11  Jan Hubicka  <hubicka@ucw.cz>
+
+	* gcc.dg/tree-ssa/operand-equal-1.c: Verify that empty constructors
+	are matched.
+
 2015-10-21  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* gcc.dg/lto/20110201-1_0.c: Restrict to sqrt_insn targets.
@@ -21,6 +26,7 @@
 
 2015-10-21  Marek Polacek  <polacek@redhat.com>
 
+
 	PR c/68024
 	* gcc.dg/pr68024.c: New test.
 
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/operand-equal-1.c b/gcc/testsuite/gcc.dg/tree-ssa/operand-equal-1.c
new file mode 100644
index 0000000000000000000000000000000000000000..09e9302ac16117f9d762af4437eedf605b83e9d3
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/operand-equal-1.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-pre" } */
+struct a {int a,b;};
+struct a ret(int val)
+{
+   return val? (struct a){} : (struct a){};
+}
+/* { dg-final { scan-tree-dump-not "if " "pre"} } */