[llvm] r292877 - [X86] Remove Undef handling from extractSubVector. This is now handled inside getNode.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Mon Jan 23 20:43:54 2017
New Revision: 292877

URL: http://llvm.org/viewvc/llvm-project?rev=292877&view=rev
Log:
[X86] Remove Undef handling from extractSubVector. This is now handled inside getNode.

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=292877&r1=292876&r2=292877&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Mon Jan 23 20:43:54 2017
@@ -4844,10 +4844,6 @@ static SDValue extractSubVector(SDValue
   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");