[InstCombine] move declarations closer to uses; NFC

llvm-svn: 340930

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
index 7be6dd0..b415c83 100644 (file)
--- a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
@@ -1353,9 +1353,6 @@ static Instruction *foldSelectShuffle(ShuffleVectorInst &Shuf,
 Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
   Value *LHS = SVI.getOperand(0);
   Value *RHS = SVI.getOperand(1);
-  SmallVector<int, 16> Mask = SVI.getShuffleMask();
-  Type *Int32Ty = Type::getInt32Ty(SVI.getContext());
-
   if (auto *V = SimplifyShuffleVectorInst(
           LHS, RHS, SVI.getMask(), SVI.getType(), SQ.getWithInstruction(&SVI)))
     return replaceInstUsesWith(SVI, V);
@@ -1363,9 +1360,7 @@ Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
   if (Instruction *I = foldSelectShuffle(SVI, Builder, DL))
     return I;
 
-  bool MadeChange = false;
   unsigned VWidth = SVI.getType()->getVectorNumElements();
-
   APInt UndefElts(VWidth, 0);
   APInt AllOnesEltMask(APInt::getAllOnesValue(VWidth));
   if (Value *V = SimplifyDemandedVectorElts(&SVI, AllOnesEltMask, UndefElts)) {
@@ -1374,7 +1369,10 @@ Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
     return &SVI;
   }
 
+  SmallVector<int, 16> Mask = SVI.getShuffleMask();
+  Type *Int32Ty = Type::getInt32Ty(SVI.getContext());
   unsigned LHSWidth = LHS->getType()->getVectorNumElements();
+  bool MadeChange = false;
 
   // Canonicalize shuffle(x    ,x,mask) -> shuffle(x, undef,mask')
   // Canonicalize shuffle(undef,x,mask) -> shuffle(x, undef,mask').