[LV] Remove unneeded LoopScalarBody member variable. (NFC)

Author: fhahn

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -638,9 +638,6 @@ class InnerLoopVectorizer {
   /// there can be multiple exiting edges reaching this block.
   BasicBlock *LoopExitBlock;
 
-  /// The scalar loop body.
-  BasicBlock *LoopScalarBody;
-
   /// A list of all bypass blocks. The first block is the entry of the loop.
   SmallVector<BasicBlock *, 4> LoopBypassBlocks;
 
@@ -2530,7 +2527,6 @@ BasicBlock *InnerLoopVectorizer::emitMemRuntimeChecks(BasicBlock *Bypass) {
 }
 
 void InnerLoopVectorizer::createVectorLoopSkeleton(StringRef Prefix) {
-  LoopScalarBody = OrigLoop->getHeader();
   LoopVectorPreHeader = OrigLoop->getLoopPreheader();
   assert(LoopVectorPreHeader && "Invalid loop structure");
   LoopExitBlock = OrigLoop->getUniqueExitBlock(); // may be nullptr
@@ -2944,20 +2940,19 @@ void InnerLoopVectorizer::fixVectorizedLoop(VPTransformState &State,
 
   // Set/update profile weights for the vector and remainder loops as original
   // loop iterations are now distributed among them. Note that original loop
-  // represented by LoopScalarBody becomes remainder loop after vectorization.
+  // becomes the scalar remainder loop after vectorization.
   //
   // For cases like foldTailByMasking() and requiresScalarEpiloque() we may
   // end up getting slightly roughened result but that should be OK since
   // profile is not inherently precise anyway. Note also possible bypass of
   // vector code caused by legality checks is ignored, assigning all the weight
   // to the vector loop, optimistically.
   //
-  // For scalable vectorization we can't know at compile time how many iterations
-  // of the loop are handled in one vector iteration, so instead assume a pessimistic
-  // vscale of '1'.
-  Loop *ScalarLoop = LI->getLoopFor(LoopScalarBody);
+  // For scalable vectorization we can't know at compile time how many
+  // iterations of the loop are handled in one vector iteration, so instead
+  // assume a pessimistic vscale of '1'.
   Loop *VectorLoop = LI->getLoopFor(HeaderBB);
-  setProfileInfoAfterUnrolling(ScalarLoop, VectorLoop, ScalarLoop,
+  setProfileInfoAfterUnrolling(OrigLoop, VectorLoop, OrigLoop,
                                VF.getKnownMinValue() * UF);
 }