71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
//===-- NVPTXAtomicLower.cpp - Lower atomics of local memory ----*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Lower atomics of local memory to simple load/stores
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "NVPTXAtomicLower.h"
|
|
#include "llvm/CodeGen/StackProtector.h"
|
|
#include "llvm/IR/Constants.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/IRBuilder.h"
|
|
#include "llvm/IR/InstIterator.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
#include "llvm/Transforms/Utils/LowerAtomic.h"
|
|
|
|
#include "MCTargetDesc/NVPTXBaseInfo.h"
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
// Hoisting the alloca instructions in the non-entry blocks to the entry
|
|
// block.
|
|
class NVPTXAtomicLower : public FunctionPass {
|
|
public:
|
|
static char ID; // Pass ID
|
|
NVPTXAtomicLower() : FunctionPass(ID) {}
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const override {
|
|
AU.setPreservesCFG();
|
|
}
|
|
|
|
StringRef getPassName() const override {
|
|
return "NVPTX lower atomics of local memory";
|
|
}
|
|
|
|
bool runOnFunction(Function &F) override;
|
|
};
|
|
} // namespace
|
|
|
|
bool NVPTXAtomicLower::runOnFunction(Function &F) {
|
|
SmallVector<AtomicRMWInst *> LocalMemoryAtomics;
|
|
for (Instruction &I : instructions(F))
|
|
if (AtomicRMWInst *RMWI = dyn_cast<AtomicRMWInst>(&I))
|
|
if (RMWI->getPointerAddressSpace() == ADDRESS_SPACE_LOCAL)
|
|
LocalMemoryAtomics.push_back(RMWI);
|
|
|
|
bool Changed = false;
|
|
for (AtomicRMWInst *RMWI : LocalMemoryAtomics)
|
|
Changed |= lowerAtomicRMWInst(RMWI);
|
|
return Changed;
|
|
}
|
|
|
|
char NVPTXAtomicLower::ID = 0;
|
|
|
|
namespace llvm {
|
|
void initializeNVPTXAtomicLowerPass(PassRegistry &);
|
|
}
|
|
|
|
INITIALIZE_PASS(NVPTXAtomicLower, "nvptx-atomic-lower",
|
|
"Lower atomics of local memory to simple load/stores", false,
|
|
false)
|
|
|
|
FunctionPass *llvm::createNVPTXAtomicLowerPass() {
|
|
return new NVPTXAtomicLower();
|
|
}
|