--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/CodeGen/X86/vbinop-simplify-bug.ll	Mon Sep 08 22:06:00 2014 +0900
@@ -0,0 +1,23 @@
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=sse2 -mcpu=corei7 -o /dev/null
+
+; Revision 199135 introduced a wrong check in method
+; DAGCombiner::SimplifyVBinOp in an attempt to refactor some code
+; using the new method 'BuildVectorSDNode::isConstant' when possible.
+; 
+; However the modified code in method SimplifyVBinOp now wrongly
+; checks that the operands of a vector bin-op are both constants.
+;
+; With that wrong change, this test started failing because of a
+; 'fatal error in the backend':
+;   Cannot select: 0x2e329d0: v4i32 = BUILD_VECTOR 0x2e2ea00, 0x2e2ea00, 0x2e2ea00, 0x2e2ea00
+;       0x2e2ea00: i32 = Constant<1> [ID=4]
+;       0x2e2ea00: i32 = Constant<1> [ID=4]
+;       0x2e2ea00: i32 = Constant<1> [ID=4]
+;       0x2e2ea00: i32 = Constant<1> [ID=4]
+
+define <8 x i32> @reduced_test_case() {
+  %Shuff = shufflevector <8 x i32> zeroinitializer, <8 x i32> zeroinitializer, <8 x i32> <i32 1, i32 3, i32 undef, i32 7, i32 9, i32 11, i32 13, i32 15>
+  %B23 = sub <8 x i32> %Shuff, <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1>
+  ret <8 x i32> %B23
+}
+