[CGP] add an IR builder to memcmp expansion class instead of recreating it; NFCI

This was a clean-up suggestion from:
https://reviews.llvm.org/D34005

llvm-svn: 306438

1 files changed, 6 insertions, 19 deletions

diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index b6a652249cd..bae074fb604 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -1662,6 +1662,7 @@ class MemCmpExpansion {
   PHINode *PhiRes;
   bool IsUsedForZeroCmp;
   const DataLayout &DL;
+  IRBuilder<> Builder;
 
   unsigned calculateNumBlocks(unsigned Size);
   void createLoadCmpBlocks();
@@ -1671,7 +1672,7 @@ class MemCmpExpansion {
   void emitLoadCompareBlock(unsigned Index, unsigned LoadSize,
                             unsigned GEPIndex);
   Value *getCompareLoadPairs(unsigned Index, unsigned Size,
-                             unsigned &NumBytesProcessed, IRBuilder<> &Builder);
+                             unsigned &NumBytesProcessed);
   void emitLoadCompareBlockMultipleLoads(unsigned Index, unsigned Size,
                                          unsigned &NumBytesProcessed);
   void emitLoadCompareByteBlock(unsigned Index, unsigned GEPIndex);
@@ -1702,7 +1703,7 @@ MemCmpExpansion::MemCmpExpansion(CallInst *CI, uint64_t Size,
                                  unsigned MaxLoadSize, unsigned LoadsPerBlock,
                                  const DataLayout &TheDataLayout)
     : CI(CI), MaxLoadSize(MaxLoadSize), NumLoadsPerBlock(LoadsPerBlock),
-      DL(TheDataLayout) {
+      DL(TheDataLayout), Builder(CI) {
 
   // A memcmp with zero-comparison with only one block of load and compare does
   // not need to set up any extra blocks. This case could be handled in the DAG,
@@ -1731,7 +1732,6 @@ MemCmpExpansion::MemCmpExpansion(CallInst *CI, uint64_t Size,
     StartBlock->getTerminator()->setSuccessor(0, LoadCmpBlocks[0]);
   }
 
-  IRBuilder<> Builder(CI->getContext());
   Builder.SetCurrentDebugLocation(CI->getDebugLoc());
 }
 
@@ -1754,8 +1754,6 @@ void MemCmpExpansion::createResultBlock() {
 // final phi node for selecting the memcmp result.
 void MemCmpExpansion::emitLoadCompareByteBlock(unsigned Index,
                                                unsigned GEPIndex) {
-  IRBuilder<> Builder(CI->getContext());
-
   Value *Source1 = CI->getArgOperand(0);
   Value *Source2 = CI->getArgOperand(1);
 
@@ -1811,8 +1809,7 @@ unsigned MemCmpExpansion::getLoadSize(unsigned Size) {
 /// This is used in the case where the memcmp() call is compared equal or not
 /// equal to zero.
 Value *MemCmpExpansion::getCompareLoadPairs(unsigned Index, unsigned Size,
-                                            unsigned &NumBytesProcessed,
-                                            IRBuilder<> &Builder) {
+                                            unsigned &NumBytesProcessed) {
   std::vector<Value *> XorList, OrList;
   Value *Diff;
 
@@ -1910,8 +1907,7 @@ Value *MemCmpExpansion::getCompareLoadPairs(unsigned Index, unsigned Size,
 
 void MemCmpExpansion::emitLoadCompareBlockMultipleLoads(
     unsigned Index, unsigned Size, unsigned &NumBytesProcessed) {
-  IRBuilder<> Builder(CI->getContext());
-  Value *Cmp = getCompareLoadPairs(Index, Size, NumBytesProcessed, Builder);
+  Value *Cmp = getCompareLoadPairs(Index, Size, NumBytesProcessed);
 
   BasicBlock *NextBB = (Index == (LoadCmpBlocks.size() - 1))
                            ? EndBlock
@@ -1946,8 +1942,6 @@ void MemCmpExpansion::emitLoadCompareBlock(unsigned Index, unsigned LoadSize,
     return;
   }
 
-  IRBuilder<> Builder(CI->getContext());
-
   Type *LoadSizeType = IntegerType::get(CI->getContext(), LoadSize * 8);
   Type *MaxLoadType = IntegerType::get(CI->getContext(), MaxLoadSize * 8);
   assert(LoadSize <= MaxLoadSize && "Unexpected load type");
@@ -2020,8 +2014,6 @@ void MemCmpExpansion::emitLoadCompareBlock(unsigned Index, unsigned LoadSize,
 // memcmp result. It compares the two loaded source values and returns -1 if
 // src1 < src2 and 1 if src1 > src2.
 void MemCmpExpansion::emitMemCmpResultBlock() {
-  IRBuilder<> Builder(CI->getContext());
-
   // Special case: if memcmp result is used in a zero equality, result does not
   // need to be calculated and can simply return 1.
   if (IsUsedForZeroCmp) {
@@ -2070,7 +2062,6 @@ unsigned MemCmpExpansion::calculateNumBlocks(unsigned Size) {
 }
 
 void MemCmpExpansion::setupResultBlockPHINodes() {
-  IRBuilder<> Builder(CI->getContext());
   Type *MaxLoadType = IntegerType::get(CI->getContext(), MaxLoadSize * 8);
   Builder.SetInsertPoint(ResBlock.BB);
   ResBlock.PhiSrc1 =
@@ -2080,8 +2071,6 @@ void MemCmpExpansion::setupResultBlockPHINodes() {
 }
 
 void MemCmpExpansion::setupEndBlockPHINodes() {
-  IRBuilder<> Builder(CI->getContext());
-
   Builder.SetInsertPoint(&EndBlock->front());
   PhiRes = Builder.CreatePHI(Type::getInt32Ty(CI->getContext()), 2, "phi.res");
 }
@@ -2102,8 +2091,7 @@ Value *MemCmpExpansion::getMemCmpExpansionZeroCase(unsigned Size) {
 /// in the general case.
 Value *MemCmpExpansion::getMemCmpEqZeroOneBlock(unsigned Size) {
   unsigned NumBytesProcessed = 0;
-  IRBuilder<> Builder(CI->getContext());
-  Value *Cmp = getCompareLoadPairs(0, Size, NumBytesProcessed, Builder);
+  Value *Cmp = getCompareLoadPairs(0, Size, NumBytesProcessed);
   return Builder.CreateZExt(Cmp, Type::getInt32Ty(CI->getContext()));
 }
 
@@ -2218,7 +2206,6 @@ Value *MemCmpExpansion::getMemCmpExpansion(uint64_t Size) {
 static bool expandMemCmp(CallInst *CI, const TargetTransformInfo *TTI,
                          const TargetLowering *TLI, const DataLayout *DL) {
   NumMemCmpCalls++;
-  IRBuilder<> Builder(CI->getContext());
 
   // TTI call to check if target would like to expand memcmp. Also, get the
   // MaxLoadSize.