llvm/llvm/lib/Target/X86/X86LowerTileCopy.cpp

//===-- X86LowerTileCopy.cpp - Expand Tile Copy Instructions---------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file defines the pass which lower AMX tile copy instructions. Since
// there is no tile copy instruction, we need store tile register to stack
// and load from stack to another tile register. We need extra GR to hold
// the stride, and we need stack slot to hold the tile data register.
// We would run this pass after copy propagation, so that we don't miss copy
// optimization. And we would run this pass before prolog/epilog insertion,
// so that we can allocate stack slot.
//
//===----------------------------------------------------------------------===//

#include "X86.h"
#include "X86InstrBuilder.h"
#include "X86InstrInfo.h"
#include "X86MachineFunctionInfo.h"
#include "X86Subtarget.h"
#include "llvm/CodeGen/LiveRegUnits.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/Debug.h"

usingnamespacellvm;

#define DEBUG_TYPE …

namespace {

class X86LowerTileCopy : public MachineFunctionPass { … };

} // namespace

char X86LowerTileCopy::ID = …;

INITIALIZE_PASS_BEGIN(X86LowerTileCopy, "lowertilecopy", "Tile Copy Lowering",
                      false, false)
INITIALIZE_PASS_END(X86LowerTileCopy, "lowertilecopy", "Tile Copy Lowering",
                    false, false)

void X86LowerTileCopy::getAnalysisUsage(AnalysisUsage &AU) const { … }

FunctionPass *llvm::createX86LowerTileCopyPass() { … }

bool X86LowerTileCopy::runOnMachineFunction(MachineFunction &MF) { … }