From: Craig Topper <craig.topper@gmail.com>
Date: Tue, 24 Jan 2017 02:43:54 +0000 (+0000)
Subject: [X86] Remove Undef handling from extractSubVector. This is now handled inside getNode.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c144a2489f654c7871cd890fece4f563d5e086e0;p=llvm

[X86] Remove Undef handling from extractSubVector. This is now handled inside getNode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292877 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 2b58c02afea..418cda63d2b 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -4844,10 +4844,6 @@ static SDValue extractSubVector(SDValue Vec, unsigned IdxVal, SelectionDAG &DAG,
   EVT ResultVT = EVT::getVectorVT(*DAG.getContext(), ElVT,
                                   VT.getVectorNumElements()/Factor);
 
-  // Extract from UNDEF is UNDEF.
-  if (Vec.isUndef())
-    return DAG.getUNDEF(ResultVT);
-
   // Extract the relevant vectorWidth bits.  Generate an EXTRACT_SUBVECTOR
   unsigned ElemsPerChunk = vectorWidth / ElVT.getSizeInBits();
   assert(isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2");