Clarify that we match BSwap in InstCombine and BitReverse in CGP. NFC.

Also, rename recognizeBitReverseOrBSwapIdiom to recognizeBSwapOrBitReverseIdiom,
so the ordering of the MatchBSwaps and MatchBitReversals arguments are
consistent with the function name.

llvm-svn: 270715
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineInternal.h b/llvm/lib/Transforms/InstCombine/InstCombineInternal.h
index e66c89b..326029d 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineInternal.h
+++ b/llvm/lib/Transforms/InstCombine/InstCombineInternal.h
@@ -563,7 +563,7 @@
   Value *InsertRangeTest(Value *V, Constant *Lo, Constant *Hi, bool isSigned,
                          bool Inside);
   Instruction *PromoteCastOfAllocation(BitCastInst &CI, AllocaInst &AI);
-  Instruction *MatchBSwapOrBitReverse(BinaryOperator &I);
+  Instruction *MatchBSwap(BinaryOperator &I);
   bool SimplifyStoreAtEndOfBlock(StoreInst &SI);
   Instruction *SimplifyMemTransfer(MemIntrinsic *MI);
   Instruction *SimplifyMemSet(MemSetInst *MI);