[llvm] r366712 - [SLPVectorizer] Fix some MSVC/cppcheck uninitialized variable warnings. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Mon Jul 22 10:57:36 2019
New Revision: 366712

URL: http://llvm.org/viewvc/llvm-project?rev=366712&view=rev
Log:
[SLPVectorizer] Fix some MSVC/cppcheck uninitialized variable warnings. NFCI.

Modified:
    llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp

Modified: llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp?rev=366712&r1=366711&r2=366712&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp (original)
+++ llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp Mon Jul 22 10:57:36 2019
@@ -3933,7 +3933,7 @@ Value *BoUpSLP::vectorizeTree(TreeEntry
                Instruction::isCast(S.getAltOpcode()))) &&
              "Invalid Shuffle Vector Operand");
 
-      Value *LHS, *RHS;
+      Value *LHS = nullptr, *RHS = nullptr;
       if (Instruction::isBinaryOp(S.getOpcode())) {
         setInsertPointAfterBundle(E->Scalars, S);
         LHS = vectorizeTree(E->getOperand(0));
@@ -5571,7 +5571,7 @@ class HorizontalReduction {
     Value *createOp(IRBuilder<> &Builder, const Twine &Name) const {
       assert(isVectorizable() &&
              "Expected add|fadd or min/max reduction operation.");
-      Value *Cmp;
+      Value *Cmp = nullptr;
       switch (Kind) {
       case RK_Arithmetic:
         return Builder.CreateBinOp((Instruction::BinaryOps)Opcode, LHS, RHS,
@@ -6323,7 +6323,7 @@ private:
     IsPairwiseReduction = PairwiseRdxCost < SplittingRdxCost;
     int VecReduxCost = IsPairwiseReduction ? PairwiseRdxCost : SplittingRdxCost;
 
-    int ScalarReduxCost;
+    int ScalarReduxCost = 0;
     switch (ReductionData.getKind()) {
     case RK_Arithmetic:
       ScalarReduxCost =