llvm/llvm/lib/Target/AMDGPU/AMDGPUMarkLastScratchLoad.cpp

//===-- AMDGPUMarkLastScratchLoad.cpp -------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Mark scratch load/spill instructions which are guaranteed to be the last time
// this scratch slot is used so it can be evicted from caches.
//
// TODO: Handle general stack accesses not just spilling.
//
//===----------------------------------------------------------------------===//

#include "AMDGPU.h"
#include "GCNSubtarget.h"
#include "llvm/CodeGen/LiveIntervals.h"
#include "llvm/CodeGen/LiveStacks.h"
#include "llvm/CodeGen/MachineOperand.h"

usingnamespacellvm;

#define DEBUG_TYPE …

namespace {

class AMDGPUMarkLastScratchLoad : public MachineFunctionPass { … };

} // end anonymous namespace

bool AMDGPUMarkLastScratchLoad::runOnMachineFunction(MachineFunction &MF) { … }

char AMDGPUMarkLastScratchLoad::ID = …;

char &llvm::AMDGPUMarkLastScratchLoadID = …;

INITIALIZE_PASS_BEGIN(AMDGPUMarkLastScratchLoad, DEBUG_TYPE,
                      "AMDGPU Mark last scratch load", false, false)
INITIALIZE_PASS_DEPENDENCY(SlotIndexesWrapperPass)
INITIALIZE_PASS_DEPENDENCY(LiveStacks)
INITIALIZE_PASS_END(AMDGPUMarkLastScratchLoad, DEBUG_TYPE,
                    "AMDGPU Mark last scratch load", false, false)