From b097aa9353121cf6713408402022b8843a0f6acc Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 14 Apr 2006 23:19:08 +0000
Subject: [PATCH] Allow undef in a shuffle mask

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27714 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/PowerPC/PPCISelLowering.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 99d3a47683f..8fa5f84db53 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -416,6 +416,7 @@ bool PPC::isSplatShuffleMask(SDNode *N, unsigned EltSize) {
   
   assert(isa<ConstantSDNode>(Elt) && "Invalid VECTOR_SHUFFLE mask!");
   for (unsigned i = EltSize, e = 16; i != e; i += EltSize) {
+    if (N->getOperand(i).getOpcode() == ISD::UNDEF) continue;
     assert(isa<ConstantSDNode>(N->getOperand(i)) &&
            "Invalid VECTOR_SHUFFLE mask!");
     for (unsigned j = 0; j != EltSize; ++j)
-- 
2.34.1