forked from OSchip/llvm-project
364 lines
12 KiB
C++
364 lines
12 KiB
C++
//===-- AMDGPUInstrInfo.cpp - Base class for AMD GPU InstrInfo ------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
/// \file
|
|
/// \brief Implementation of the TargetInstrInfo class that is common to all
|
|
/// AMD GPUs.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "AMDGPUInstrInfo.h"
|
|
#include "AMDGPURegisterInfo.h"
|
|
#include "AMDGPUTargetMachine.h"
|
|
#include "llvm/CodeGen/MachineFrameInfo.h"
|
|
#include "llvm/CodeGen/MachineInstrBuilder.h"
|
|
#include "llvm/CodeGen/MachineRegisterInfo.h"
|
|
|
|
using namespace llvm;
|
|
|
|
#define GET_INSTRINFO_CTOR_DTOR
|
|
#define GET_INSTRINFO_NAMED_OPS
|
|
#define GET_INSTRMAP_INFO
|
|
#include "AMDGPUGenInstrInfo.inc"
|
|
|
|
// Pin the vtable to this file.
|
|
void AMDGPUInstrInfo::anchor() {}
|
|
|
|
AMDGPUInstrInfo::AMDGPUInstrInfo(const AMDGPUSubtarget &st)
|
|
: AMDGPUGenInstrInfo(-1,-1), RI(st), ST(st) { }
|
|
|
|
const AMDGPURegisterInfo &AMDGPUInstrInfo::getRegisterInfo() const {
|
|
return RI;
|
|
}
|
|
|
|
bool AMDGPUInstrInfo::isCoalescableExtInstr(const MachineInstr &MI,
|
|
unsigned &SrcReg, unsigned &DstReg,
|
|
unsigned &SubIdx) const {
|
|
// TODO: Implement this function
|
|
return false;
|
|
}
|
|
|
|
unsigned AMDGPUInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
|
|
int &FrameIndex) const {
|
|
// TODO: Implement this function
|
|
return 0;
|
|
}
|
|
|
|
unsigned AMDGPUInstrInfo::isLoadFromStackSlotPostFE(const MachineInstr *MI,
|
|
int &FrameIndex) const {
|
|
// TODO: Implement this function
|
|
return 0;
|
|
}
|
|
|
|
bool AMDGPUInstrInfo::hasLoadFromStackSlot(const MachineInstr *MI,
|
|
const MachineMemOperand *&MMO,
|
|
int &FrameIndex) const {
|
|
// TODO: Implement this function
|
|
return false;
|
|
}
|
|
unsigned AMDGPUInstrInfo::isStoreFromStackSlot(const MachineInstr *MI,
|
|
int &FrameIndex) const {
|
|
// TODO: Implement this function
|
|
return 0;
|
|
}
|
|
unsigned AMDGPUInstrInfo::isStoreFromStackSlotPostFE(const MachineInstr *MI,
|
|
int &FrameIndex) const {
|
|
// TODO: Implement this function
|
|
return 0;
|
|
}
|
|
bool AMDGPUInstrInfo::hasStoreFromStackSlot(const MachineInstr *MI,
|
|
const MachineMemOperand *&MMO,
|
|
int &FrameIndex) const {
|
|
// TODO: Implement this function
|
|
return false;
|
|
}
|
|
|
|
MachineInstr *
|
|
AMDGPUInstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
|
|
MachineBasicBlock::iterator &MBBI,
|
|
LiveVariables *LV) const {
|
|
// TODO: Implement this function
|
|
return nullptr;
|
|
}
|
|
bool AMDGPUInstrInfo::getNextBranchInstr(MachineBasicBlock::iterator &iter,
|
|
MachineBasicBlock &MBB) const {
|
|
while (iter != MBB.end()) {
|
|
switch (iter->getOpcode()) {
|
|
default:
|
|
break;
|
|
case AMDGPU::BRANCH_COND_i32:
|
|
case AMDGPU::BRANCH_COND_f32:
|
|
case AMDGPU::BRANCH:
|
|
return true;
|
|
};
|
|
++iter;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
AMDGPUInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
unsigned SrcReg, bool isKill,
|
|
int FrameIndex,
|
|
const TargetRegisterClass *RC,
|
|
const TargetRegisterInfo *TRI) const {
|
|
llvm_unreachable("Not Implemented");
|
|
}
|
|
|
|
void
|
|
AMDGPUInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
unsigned DestReg, int FrameIndex,
|
|
const TargetRegisterClass *RC,
|
|
const TargetRegisterInfo *TRI) const {
|
|
llvm_unreachable("Not Implemented");
|
|
}
|
|
|
|
bool AMDGPUInstrInfo::expandPostRAPseudo (MachineBasicBlock::iterator MI) const {
|
|
MachineBasicBlock *MBB = MI->getParent();
|
|
int OffsetOpIdx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
|
|
AMDGPU::OpName::addr);
|
|
// addr is a custom operand with multiple MI operands, and only the
|
|
// first MI operand is given a name.
|
|
int RegOpIdx = OffsetOpIdx + 1;
|
|
int ChanOpIdx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
|
|
AMDGPU::OpName::chan);
|
|
if (isRegisterLoad(*MI)) {
|
|
int DstOpIdx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
|
|
AMDGPU::OpName::dst);
|
|
unsigned RegIndex = MI->getOperand(RegOpIdx).getImm();
|
|
unsigned Channel = MI->getOperand(ChanOpIdx).getImm();
|
|
unsigned Address = calculateIndirectAddress(RegIndex, Channel);
|
|
unsigned OffsetReg = MI->getOperand(OffsetOpIdx).getReg();
|
|
if (OffsetReg == AMDGPU::INDIRECT_BASE_ADDR) {
|
|
buildMovInstr(MBB, MI, MI->getOperand(DstOpIdx).getReg(),
|
|
getIndirectAddrRegClass()->getRegister(Address));
|
|
} else {
|
|
buildIndirectRead(MBB, MI, MI->getOperand(DstOpIdx).getReg(),
|
|
Address, OffsetReg);
|
|
}
|
|
} else if (isRegisterStore(*MI)) {
|
|
int ValOpIdx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
|
|
AMDGPU::OpName::val);
|
|
unsigned RegIndex = MI->getOperand(RegOpIdx).getImm();
|
|
unsigned Channel = MI->getOperand(ChanOpIdx).getImm();
|
|
unsigned Address = calculateIndirectAddress(RegIndex, Channel);
|
|
unsigned OffsetReg = MI->getOperand(OffsetOpIdx).getReg();
|
|
if (OffsetReg == AMDGPU::INDIRECT_BASE_ADDR) {
|
|
buildMovInstr(MBB, MI, getIndirectAddrRegClass()->getRegister(Address),
|
|
MI->getOperand(ValOpIdx).getReg());
|
|
} else {
|
|
buildIndirectWrite(MBB, MI, MI->getOperand(ValOpIdx).getReg(),
|
|
calculateIndirectAddress(RegIndex, Channel),
|
|
OffsetReg);
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
MBB->erase(MI);
|
|
return true;
|
|
}
|
|
|
|
|
|
MachineInstr *
|
|
AMDGPUInstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
|
|
MachineInstr *MI,
|
|
const SmallVectorImpl<unsigned> &Ops,
|
|
int FrameIndex) const {
|
|
// TODO: Implement this function
|
|
return nullptr;
|
|
}
|
|
MachineInstr*
|
|
AMDGPUInstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
|
|
MachineInstr *MI,
|
|
const SmallVectorImpl<unsigned> &Ops,
|
|
MachineInstr *LoadMI) const {
|
|
// TODO: Implement this function
|
|
return nullptr;
|
|
}
|
|
bool
|
|
AMDGPUInstrInfo::canFoldMemoryOperand(const MachineInstr *MI,
|
|
const SmallVectorImpl<unsigned> &Ops) const {
|
|
// TODO: Implement this function
|
|
return false;
|
|
}
|
|
bool
|
|
AMDGPUInstrInfo::unfoldMemoryOperand(MachineFunction &MF, MachineInstr *MI,
|
|
unsigned Reg, bool UnfoldLoad,
|
|
bool UnfoldStore,
|
|
SmallVectorImpl<MachineInstr*> &NewMIs) const {
|
|
// TODO: Implement this function
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
AMDGPUInstrInfo::unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
|
|
SmallVectorImpl<SDNode*> &NewNodes) const {
|
|
// TODO: Implement this function
|
|
return false;
|
|
}
|
|
|
|
unsigned
|
|
AMDGPUInstrInfo::getOpcodeAfterMemoryUnfold(unsigned Opc,
|
|
bool UnfoldLoad, bool UnfoldStore,
|
|
unsigned *LoadRegIndex) const {
|
|
// TODO: Implement this function
|
|
return 0;
|
|
}
|
|
|
|
bool AMDGPUInstrInfo::enableClusterLoads() const {
|
|
return true;
|
|
}
|
|
|
|
// FIXME: This behaves strangely. If, for example, you have 32 load + stores,
|
|
// the first 16 loads will be interleaved with the stores, and the next 16 will
|
|
// be clustered as expected. It should really split into 2 16 store batches.
|
|
//
|
|
// Loads are clustered until this returns false, rather than trying to schedule
|
|
// groups of stores. This also means we have to deal with saying different
|
|
// address space loads should be clustered, and ones which might cause bank
|
|
// conflicts.
|
|
//
|
|
// This might be deprecated so it might not be worth that much effort to fix.
|
|
bool AMDGPUInstrInfo::shouldScheduleLoadsNear(SDNode *Load0, SDNode *Load1,
|
|
int64_t Offset0, int64_t Offset1,
|
|
unsigned NumLoads) const {
|
|
assert(Offset1 > Offset0 &&
|
|
"Second offset should be larger than first offset!");
|
|
// If we have less than 16 loads in a row, and the offsets are within 64
|
|
// bytes, then schedule together.
|
|
|
|
// A cacheline is 64 bytes (for global memory).
|
|
return (NumLoads <= 16 && (Offset1 - Offset0) < 64);
|
|
}
|
|
|
|
bool
|
|
AMDGPUInstrInfo::ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond)
|
|
const {
|
|
// TODO: Implement this function
|
|
return true;
|
|
}
|
|
void AMDGPUInstrInfo::insertNoop(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI) const {
|
|
// TODO: Implement this function
|
|
}
|
|
|
|
bool AMDGPUInstrInfo::isPredicated(const MachineInstr *MI) const {
|
|
// TODO: Implement this function
|
|
return false;
|
|
}
|
|
bool
|
|
AMDGPUInstrInfo::SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1,
|
|
const SmallVectorImpl<MachineOperand> &Pred2)
|
|
const {
|
|
// TODO: Implement this function
|
|
return false;
|
|
}
|
|
|
|
bool AMDGPUInstrInfo::DefinesPredicate(MachineInstr *MI,
|
|
std::vector<MachineOperand> &Pred) const {
|
|
// TODO: Implement this function
|
|
return false;
|
|
}
|
|
|
|
bool AMDGPUInstrInfo::isPredicable(MachineInstr *MI) const {
|
|
// TODO: Implement this function
|
|
return MI->getDesc().isPredicable();
|
|
}
|
|
|
|
bool
|
|
AMDGPUInstrInfo::isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const {
|
|
// TODO: Implement this function
|
|
return true;
|
|
}
|
|
|
|
bool AMDGPUInstrInfo::isRegisterStore(const MachineInstr &MI) const {
|
|
return get(MI.getOpcode()).TSFlags & AMDGPU_FLAG_REGISTER_STORE;
|
|
}
|
|
|
|
bool AMDGPUInstrInfo::isRegisterLoad(const MachineInstr &MI) const {
|
|
return get(MI.getOpcode()).TSFlags & AMDGPU_FLAG_REGISTER_LOAD;
|
|
}
|
|
|
|
int AMDGPUInstrInfo::getIndirectIndexBegin(const MachineFunction &MF) const {
|
|
const MachineRegisterInfo &MRI = MF.getRegInfo();
|
|
const MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
int Offset = -1;
|
|
|
|
if (MFI->getNumObjects() == 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (MRI.livein_empty()) {
|
|
return 0;
|
|
}
|
|
|
|
const TargetRegisterClass *IndirectRC = getIndirectAddrRegClass();
|
|
for (MachineRegisterInfo::livein_iterator LI = MRI.livein_begin(),
|
|
LE = MRI.livein_end();
|
|
LI != LE; ++LI) {
|
|
unsigned Reg = LI->first;
|
|
if (TargetRegisterInfo::isVirtualRegister(Reg) ||
|
|
!IndirectRC->contains(Reg))
|
|
continue;
|
|
|
|
unsigned RegIndex;
|
|
unsigned RegEnd;
|
|
for (RegIndex = 0, RegEnd = IndirectRC->getNumRegs(); RegIndex != RegEnd;
|
|
++RegIndex) {
|
|
if (IndirectRC->getRegister(RegIndex) == Reg)
|
|
break;
|
|
}
|
|
Offset = std::max(Offset, (int)RegIndex);
|
|
}
|
|
|
|
return Offset + 1;
|
|
}
|
|
|
|
int AMDGPUInstrInfo::getIndirectIndexEnd(const MachineFunction &MF) const {
|
|
int Offset = 0;
|
|
const MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
|
|
// Variable sized objects are not supported
|
|
assert(!MFI->hasVarSizedObjects());
|
|
|
|
if (MFI->getNumObjects() == 0) {
|
|
return -1;
|
|
}
|
|
|
|
Offset = MF.getTarget()
|
|
.getSubtargetImpl()
|
|
->getFrameLowering()
|
|
->getFrameIndexOffset(MF, -1);
|
|
|
|
return getIndirectIndexBegin(MF) + Offset;
|
|
}
|
|
|
|
int AMDGPUInstrInfo::getMaskedMIMGOp(uint16_t Opcode, unsigned Channels) const {
|
|
switch (Channels) {
|
|
default: return Opcode;
|
|
case 1: return AMDGPU::getMaskedMIMGOp(Opcode, AMDGPU::Channels_1);
|
|
case 2: return AMDGPU::getMaskedMIMGOp(Opcode, AMDGPU::Channels_2);
|
|
case 3: return AMDGPU::getMaskedMIMGOp(Opcode, AMDGPU::Channels_3);
|
|
}
|
|
}
|
|
|
|
// Wrapper for Tablegen'd function. enum Subtarget is not defined in any
|
|
// header files, so we need to wrap it in a function that takes unsigned
|
|
// instead.
|
|
namespace llvm {
|
|
namespace AMDGPU {
|
|
int getMCOpcode(uint16_t Opcode, unsigned Gen) {
|
|
return getMCOpcode(Opcode);
|
|
}
|
|
}
|
|
}
|