[VectorCombine] Rename foldBitcastShuf -> foldBitcastShuffle. NFC.

Consistently use the term "Shuffle" in all vector combiner folds.

Author: RKSimon

llvm/lib/Transforms/Vectorize/VectorCombine.cpp

@@ -101,7 +101,7 @@ class VectorCombine {
                        Instruction &I);
   bool foldExtractExtract(Instruction &I);
   bool foldInsExtFNeg(Instruction &I);
-  bool foldBitcastShuf(Instruction &I);
+  bool foldBitcastShuffle(Instruction &I);
   bool scalarizeBinopOrCmp(Instruction &I);
   bool scalarizeVPIntrinsic(Instruction &I);
   bool foldExtractedCmps(Instruction &I);
@@ -679,7 +679,7 @@ bool VectorCombine::foldInsExtFNeg(Instruction &I) {
 /// If this is a bitcast of a shuffle, try to bitcast the source vector to the
 /// destination type followed by shuffle. This can enable further transforms by
 /// moving bitcasts or shuffles together.
-bool VectorCombine::foldBitcastShuf(Instruction &I) {
+bool VectorCombine::foldBitcastShuffle(Instruction &I) {
   Value *V;
   ArrayRef<int> Mask;
   if (!match(&I, m_BitCast(
@@ -1880,7 +1880,7 @@ bool VectorCombine::run() {
         MadeChange |= foldSelectShuffle(I);
         break;
       case Instruction::BitCast:
-        MadeChange |= foldBitcastShuf(I);
+        MadeChange |= foldBitcastShuffle(I);
         break;
       }
     } else {