[llvm] r361569 - [InstCombine] remove redundant fold for insertelement; NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Thu May 23 16:33:34 2019
New Revision: 361569

URL: http://llvm.org/viewvc/llvm-project?rev=361569&view=rev
Log:
[InstCombine] remove redundant fold for insertelement; NFC

The out-of-bounds index pattern is handled by InstSimplify.

Modified:
    llvm/trunk/lib/Transforms/InstCombine/InstCombineVectorOps.cpp

Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/InstCombine/InstCombineVectorOps.cpp?rev=361569&r1=361568&r2=361569&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/InstCombine/InstCombineVectorOps.cpp (original)
+++ llvm/trunk/lib/Transforms/InstCombine/InstCombineVectorOps.cpp Thu May 23 16:33:34 2019
@@ -884,14 +884,10 @@ Instruction *InstCombiner::visitInsertEl
   if (match(IdxOp, m_ConstantInt(InsertedIdx)) &&
       match(ScalarOp, m_ExtractElement(m_Value(ExtVecOp),
                                        m_ConstantInt(ExtractedIdx)))) {
-    unsigned NumInsertVectorElts = IE.getType()->getNumElements();
     unsigned NumExtractVectorElts = ExtVecOp->getType()->getVectorNumElements();
     if (ExtractedIdx >= NumExtractVectorElts) // Out of range extract.
       return replaceInstUsesWith(IE, VecOp);
 
-    if (InsertedIdx >= NumInsertVectorElts)  // Out of range insert.
-      return replaceInstUsesWith(IE, UndefValue::get(IE.getType()));
-
     // If we are extracting a value from a vector, then inserting it right
     // back into the same place, just use the input vector.
     if (ExtVecOp == VecOp && ExtractedIdx == InsertedIdx)