Revert "[NVPTX] Enable lowering of atomics on local memory"

This reverts commit fede99d.

Author: wsmoses

llvm/include/llvm/Transforms/Scalar/LowerAtomic.h

@@ -24,12 +24,6 @@ class LowerAtomicPass : public PassInfoMixin<LowerAtomicPass> {
   PreservedAnalyses run(Function &F, FunctionAnalysisManager &);
   static bool isRequired() { return true; }
 };
-
-class AtomicRMWInst;
-/// Convert the given RMWI into primitive load and stores,
-/// assuming that doing so is legal. Return true if the lowering
-/// succeeds.
-bool lowerAtomicRMWInst(AtomicRMWInst *RMWI);
 }
 
 #endif // LLVM_TRANSFORMS_SCALAR_LOWERATOMIC_H

llvm/lib/Target/NVPTX/CMakeLists.txt

@@ -12,7 +12,6 @@ add_public_tablegen_target(NVPTXCommonTableGen)
 
 set(NVPTXCodeGen_sources
   NVPTXAllocaHoisting.cpp
-  NVPTXAtomicLower.cpp
   NVPTXAsmPrinter.cpp
   NVPTXAssignValidGlobalNames.cpp
   NVPTXFrameLowering.cpp

llvm/lib/Target/NVPTX/NVPTXAtomicLower.cpp

@@ -13,7 +13,6 @@
 #include "NVPTXTargetMachine.h"
 #include "NVPTX.h"
 #include "NVPTXAllocaHoisting.h"
-#include "NVPTXAtomicLower.h"
 #include "NVPTXLowerAggrCopies.h"
 #include "NVPTXTargetObjectFile.h"
 #include "NVPTXTargetTransformInfo.h"
@@ -66,7 +65,6 @@ void initializeNVVMIntrRangePass(PassRegistry&);
 void initializeNVVMReflectPass(PassRegistry&);
 void initializeGenericToNVVMPass(PassRegistry&);
 void initializeNVPTXAllocaHoistingPass(PassRegistry &);
-void initializeNVPTXAtomicLowerPass(PassRegistry &);
 void initializeNVPTXAssignValidGlobalNamesPass(PassRegistry&);
 void initializeNVPTXLowerAggrCopiesPass(PassRegistry &);
 void initializeNVPTXLowerArgsPass(PassRegistry &);
@@ -88,7 +86,6 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeNVPTXTarget() {
   initializeGenericToNVVMPass(PR);
   initializeNVPTXAllocaHoistingPass(PR);
   initializeNVPTXAssignValidGlobalNamesPass(PR);
-  initializeNVPTXAtomicLowerPass(PR);
   initializeNVPTXLowerArgsPass(PR);
   initializeNVPTXLowerAllocaPass(PR);
   initializeNVPTXLowerAggrCopiesPass(PR);
@@ -255,7 +252,6 @@ void NVPTXPassConfig::addAddressSpaceInferencePasses() {
   addPass(createSROAPass());
   addPass(createNVPTXLowerAllocaPass());
   addPass(createInferAddressSpacesPass());
-  addPass(createNVPTXAtomicLowerPass());
 }
 
 void NVPTXPassConfig::addStraightLineScalarOptimizationPasses() {

llvm/lib/Target/NVPTX/NVPTXAtomicLower.h

@@ -40,7 +40,7 @@ static bool LowerAtomicCmpXchgInst(AtomicCmpXchgInst *CXI) {
   return true;
 }
 
-bool llvm::lowerAtomicRMWInst(AtomicRMWInst *RMWI) {
+static bool LowerAtomicRMWInst(AtomicRMWInst *RMWI) {
   IRBuilder<> Builder(RMWI);
   Value *Ptr = RMWI->getPointerOperand();
   Value *Val = RMWI->getValOperand();
@@ -123,7 +123,7 @@ static bool runOnBasicBlock(BasicBlock &BB) {
     else if (AtomicCmpXchgInst *CXI = dyn_cast<AtomicCmpXchgInst>(&Inst))
       Changed |= LowerAtomicCmpXchgInst(CXI);
     else if (AtomicRMWInst *RMWI = dyn_cast<AtomicRMWInst>(&Inst))
-      Changed |= lowerAtomicRMWInst(RMWI);
+      Changed |= LowerAtomicRMWInst(RMWI);
     else if (LoadInst *LI = dyn_cast<LoadInst>(&Inst)) {
       if (LI->isAtomic())
         LowerLoadInst(LI);