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NVPTXISelDAGToDAG.cpp
3765 lines (3586 loc) · 133 KB
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NVPTXISelDAGToDAG.cpp
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//===-- NVPTXISelDAGToDAG.cpp - A dag to dag inst selector for NVPTX ------===//
//
// 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 an instruction selector for the NVPTX target.
//
//===----------------------------------------------------------------------===//
#include "NVPTXISelDAGToDAG.h"
#include "MCTargetDesc/NVPTXBaseInfo.h"
#include "NVPTXUtilities.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicsNVPTX.h"
#include "llvm/Support/AtomicOrdering.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetIntrinsicInfo.h"
using namespace llvm;
#define DEBUG_TYPE "nvptx-isel"
#define PASS_NAME "NVPTX DAG->DAG Pattern Instruction Selection"
/// createNVPTXISelDag - This pass converts a legalized DAG into a
/// NVPTX-specific DAG, ready for instruction scheduling.
FunctionPass *llvm::createNVPTXISelDag(NVPTXTargetMachine &TM,
llvm::CodeGenOpt::Level OptLevel) {
return new NVPTXDAGToDAGISel(TM, OptLevel);
}
char NVPTXDAGToDAGISel::ID = 0;
INITIALIZE_PASS(NVPTXDAGToDAGISel, DEBUG_TYPE, PASS_NAME, false, false)
NVPTXDAGToDAGISel::NVPTXDAGToDAGISel(NVPTXTargetMachine &tm,
CodeGenOpt::Level OptLevel)
: SelectionDAGISel(ID, tm, OptLevel), TM(tm) {
doMulWide = (OptLevel > 0);
}
bool NVPTXDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) {
Subtarget = &MF.getSubtarget<NVPTXSubtarget>();
return SelectionDAGISel::runOnMachineFunction(MF);
}
int NVPTXDAGToDAGISel::getDivF32Level() const {
return Subtarget->getTargetLowering()->getDivF32Level();
}
bool NVPTXDAGToDAGISel::usePrecSqrtF32() const {
return Subtarget->getTargetLowering()->usePrecSqrtF32();
}
bool NVPTXDAGToDAGISel::useF32FTZ() const {
return Subtarget->getTargetLowering()->useF32FTZ(*MF);
}
bool NVPTXDAGToDAGISel::allowFMA() const {
const NVPTXTargetLowering *TL = Subtarget->getTargetLowering();
return TL->allowFMA(*MF, OptLevel);
}
bool NVPTXDAGToDAGISel::allowUnsafeFPMath() const {
const NVPTXTargetLowering *TL = Subtarget->getTargetLowering();
return TL->allowUnsafeFPMath(*MF);
}
bool NVPTXDAGToDAGISel::useShortPointers() const {
return TM.useShortPointers();
}
/// Select - Select instructions not customized! Used for
/// expanded, promoted and normal instructions.
void NVPTXDAGToDAGISel::Select(SDNode *N) {
if (N->isMachineOpcode()) {
N->setNodeId(-1);
return; // Already selected.
}
switch (N->getOpcode()) {
case ISD::LOAD:
case ISD::ATOMIC_LOAD:
if (tryLoad(N))
return;
break;
case ISD::STORE:
case ISD::ATOMIC_STORE:
if (tryStore(N))
return;
break;
case ISD::EXTRACT_VECTOR_ELT:
if (tryEXTRACT_VECTOR_ELEMENT(N))
return;
break;
case NVPTXISD::SETP_F16X2:
SelectSETP_F16X2(N);
return;
case NVPTXISD::LoadV2:
case NVPTXISD::LoadV4:
if (tryLoadVector(N))
return;
break;
case NVPTXISD::LDGV2:
case NVPTXISD::LDGV4:
case NVPTXISD::LDUV2:
case NVPTXISD::LDUV4:
if (tryLDGLDU(N))
return;
break;
case NVPTXISD::StoreV2:
case NVPTXISD::StoreV4:
if (tryStoreVector(N))
return;
break;
case NVPTXISD::LoadParam:
case NVPTXISD::LoadParamV2:
case NVPTXISD::LoadParamV4:
if (tryLoadParam(N))
return;
break;
case NVPTXISD::StoreRetval:
case NVPTXISD::StoreRetvalV2:
case NVPTXISD::StoreRetvalV4:
if (tryStoreRetval(N))
return;
break;
case NVPTXISD::StoreParam:
case NVPTXISD::StoreParamV2:
case NVPTXISD::StoreParamV4:
case NVPTXISD::StoreParamS32:
case NVPTXISD::StoreParamU32:
if (tryStoreParam(N))
return;
break;
case ISD::INTRINSIC_WO_CHAIN:
if (tryIntrinsicNoChain(N))
return;
break;
case ISD::INTRINSIC_W_CHAIN:
if (tryIntrinsicChain(N))
return;
break;
case NVPTXISD::Tex1DFloatS32:
case NVPTXISD::Tex1DFloatFloat:
case NVPTXISD::Tex1DFloatFloatLevel:
case NVPTXISD::Tex1DFloatFloatGrad:
case NVPTXISD::Tex1DS32S32:
case NVPTXISD::Tex1DS32Float:
case NVPTXISD::Tex1DS32FloatLevel:
case NVPTXISD::Tex1DS32FloatGrad:
case NVPTXISD::Tex1DU32S32:
case NVPTXISD::Tex1DU32Float:
case NVPTXISD::Tex1DU32FloatLevel:
case NVPTXISD::Tex1DU32FloatGrad:
case NVPTXISD::Tex1DArrayFloatS32:
case NVPTXISD::Tex1DArrayFloatFloat:
case NVPTXISD::Tex1DArrayFloatFloatLevel:
case NVPTXISD::Tex1DArrayFloatFloatGrad:
case NVPTXISD::Tex1DArrayS32S32:
case NVPTXISD::Tex1DArrayS32Float:
case NVPTXISD::Tex1DArrayS32FloatLevel:
case NVPTXISD::Tex1DArrayS32FloatGrad:
case NVPTXISD::Tex1DArrayU32S32:
case NVPTXISD::Tex1DArrayU32Float:
case NVPTXISD::Tex1DArrayU32FloatLevel:
case NVPTXISD::Tex1DArrayU32FloatGrad:
case NVPTXISD::Tex2DFloatS32:
case NVPTXISD::Tex2DFloatFloat:
case NVPTXISD::Tex2DFloatFloatLevel:
case NVPTXISD::Tex2DFloatFloatGrad:
case NVPTXISD::Tex2DS32S32:
case NVPTXISD::Tex2DS32Float:
case NVPTXISD::Tex2DS32FloatLevel:
case NVPTXISD::Tex2DS32FloatGrad:
case NVPTXISD::Tex2DU32S32:
case NVPTXISD::Tex2DU32Float:
case NVPTXISD::Tex2DU32FloatLevel:
case NVPTXISD::Tex2DU32FloatGrad:
case NVPTXISD::Tex2DArrayFloatS32:
case NVPTXISD::Tex2DArrayFloatFloat:
case NVPTXISD::Tex2DArrayFloatFloatLevel:
case NVPTXISD::Tex2DArrayFloatFloatGrad:
case NVPTXISD::Tex2DArrayS32S32:
case NVPTXISD::Tex2DArrayS32Float:
case NVPTXISD::Tex2DArrayS32FloatLevel:
case NVPTXISD::Tex2DArrayS32FloatGrad:
case NVPTXISD::Tex2DArrayU32S32:
case NVPTXISD::Tex2DArrayU32Float:
case NVPTXISD::Tex2DArrayU32FloatLevel:
case NVPTXISD::Tex2DArrayU32FloatGrad:
case NVPTXISD::Tex3DFloatS32:
case NVPTXISD::Tex3DFloatFloat:
case NVPTXISD::Tex3DFloatFloatLevel:
case NVPTXISD::Tex3DFloatFloatGrad:
case NVPTXISD::Tex3DS32S32:
case NVPTXISD::Tex3DS32Float:
case NVPTXISD::Tex3DS32FloatLevel:
case NVPTXISD::Tex3DS32FloatGrad:
case NVPTXISD::Tex3DU32S32:
case NVPTXISD::Tex3DU32Float:
case NVPTXISD::Tex3DU32FloatLevel:
case NVPTXISD::Tex3DU32FloatGrad:
case NVPTXISD::TexCubeFloatFloat:
case NVPTXISD::TexCubeFloatFloatLevel:
case NVPTXISD::TexCubeS32Float:
case NVPTXISD::TexCubeS32FloatLevel:
case NVPTXISD::TexCubeU32Float:
case NVPTXISD::TexCubeU32FloatLevel:
case NVPTXISD::TexCubeArrayFloatFloat:
case NVPTXISD::TexCubeArrayFloatFloatLevel:
case NVPTXISD::TexCubeArrayS32Float:
case NVPTXISD::TexCubeArrayS32FloatLevel:
case NVPTXISD::TexCubeArrayU32Float:
case NVPTXISD::TexCubeArrayU32FloatLevel:
case NVPTXISD::Tld4R2DFloatFloat:
case NVPTXISD::Tld4G2DFloatFloat:
case NVPTXISD::Tld4B2DFloatFloat:
case NVPTXISD::Tld4A2DFloatFloat:
case NVPTXISD::Tld4R2DS64Float:
case NVPTXISD::Tld4G2DS64Float:
case NVPTXISD::Tld4B2DS64Float:
case NVPTXISD::Tld4A2DS64Float:
case NVPTXISD::Tld4R2DU64Float:
case NVPTXISD::Tld4G2DU64Float:
case NVPTXISD::Tld4B2DU64Float:
case NVPTXISD::Tld4A2DU64Float:
case NVPTXISD::TexUnified1DFloatS32:
case NVPTXISD::TexUnified1DFloatFloat:
case NVPTXISD::TexUnified1DFloatFloatLevel:
case NVPTXISD::TexUnified1DFloatFloatGrad:
case NVPTXISD::TexUnified1DS32S32:
case NVPTXISD::TexUnified1DS32Float:
case NVPTXISD::TexUnified1DS32FloatLevel:
case NVPTXISD::TexUnified1DS32FloatGrad:
case NVPTXISD::TexUnified1DU32S32:
case NVPTXISD::TexUnified1DU32Float:
case NVPTXISD::TexUnified1DU32FloatLevel:
case NVPTXISD::TexUnified1DU32FloatGrad:
case NVPTXISD::TexUnified1DArrayFloatS32:
case NVPTXISD::TexUnified1DArrayFloatFloat:
case NVPTXISD::TexUnified1DArrayFloatFloatLevel:
case NVPTXISD::TexUnified1DArrayFloatFloatGrad:
case NVPTXISD::TexUnified1DArrayS32S32:
case NVPTXISD::TexUnified1DArrayS32Float:
case NVPTXISD::TexUnified1DArrayS32FloatLevel:
case NVPTXISD::TexUnified1DArrayS32FloatGrad:
case NVPTXISD::TexUnified1DArrayU32S32:
case NVPTXISD::TexUnified1DArrayU32Float:
case NVPTXISD::TexUnified1DArrayU32FloatLevel:
case NVPTXISD::TexUnified1DArrayU32FloatGrad:
case NVPTXISD::TexUnified2DFloatS32:
case NVPTXISD::TexUnified2DFloatFloat:
case NVPTXISD::TexUnified2DFloatFloatLevel:
case NVPTXISD::TexUnified2DFloatFloatGrad:
case NVPTXISD::TexUnified2DS32S32:
case NVPTXISD::TexUnified2DS32Float:
case NVPTXISD::TexUnified2DS32FloatLevel:
case NVPTXISD::TexUnified2DS32FloatGrad:
case NVPTXISD::TexUnified2DU32S32:
case NVPTXISD::TexUnified2DU32Float:
case NVPTXISD::TexUnified2DU32FloatLevel:
case NVPTXISD::TexUnified2DU32FloatGrad:
case NVPTXISD::TexUnified2DArrayFloatS32:
case NVPTXISD::TexUnified2DArrayFloatFloat:
case NVPTXISD::TexUnified2DArrayFloatFloatLevel:
case NVPTXISD::TexUnified2DArrayFloatFloatGrad:
case NVPTXISD::TexUnified2DArrayS32S32:
case NVPTXISD::TexUnified2DArrayS32Float:
case NVPTXISD::TexUnified2DArrayS32FloatLevel:
case NVPTXISD::TexUnified2DArrayS32FloatGrad:
case NVPTXISD::TexUnified2DArrayU32S32:
case NVPTXISD::TexUnified2DArrayU32Float:
case NVPTXISD::TexUnified2DArrayU32FloatLevel:
case NVPTXISD::TexUnified2DArrayU32FloatGrad:
case NVPTXISD::TexUnified3DFloatS32:
case NVPTXISD::TexUnified3DFloatFloat:
case NVPTXISD::TexUnified3DFloatFloatLevel:
case NVPTXISD::TexUnified3DFloatFloatGrad:
case NVPTXISD::TexUnified3DS32S32:
case NVPTXISD::TexUnified3DS32Float:
case NVPTXISD::TexUnified3DS32FloatLevel:
case NVPTXISD::TexUnified3DS32FloatGrad:
case NVPTXISD::TexUnified3DU32S32:
case NVPTXISD::TexUnified3DU32Float:
case NVPTXISD::TexUnified3DU32FloatLevel:
case NVPTXISD::TexUnified3DU32FloatGrad:
case NVPTXISD::TexUnifiedCubeFloatFloat:
case NVPTXISD::TexUnifiedCubeFloatFloatLevel:
case NVPTXISD::TexUnifiedCubeS32Float:
case NVPTXISD::TexUnifiedCubeS32FloatLevel:
case NVPTXISD::TexUnifiedCubeU32Float:
case NVPTXISD::TexUnifiedCubeU32FloatLevel:
case NVPTXISD::TexUnifiedCubeArrayFloatFloat:
case NVPTXISD::TexUnifiedCubeArrayFloatFloatLevel:
case NVPTXISD::TexUnifiedCubeArrayS32Float:
case NVPTXISD::TexUnifiedCubeArrayS32FloatLevel:
case NVPTXISD::TexUnifiedCubeArrayU32Float:
case NVPTXISD::TexUnifiedCubeArrayU32FloatLevel:
case NVPTXISD::Tld4UnifiedR2DFloatFloat:
case NVPTXISD::Tld4UnifiedG2DFloatFloat:
case NVPTXISD::Tld4UnifiedB2DFloatFloat:
case NVPTXISD::Tld4UnifiedA2DFloatFloat:
case NVPTXISD::Tld4UnifiedR2DS64Float:
case NVPTXISD::Tld4UnifiedG2DS64Float:
case NVPTXISD::Tld4UnifiedB2DS64Float:
case NVPTXISD::Tld4UnifiedA2DS64Float:
case NVPTXISD::Tld4UnifiedR2DU64Float:
case NVPTXISD::Tld4UnifiedG2DU64Float:
case NVPTXISD::Tld4UnifiedB2DU64Float:
case NVPTXISD::Tld4UnifiedA2DU64Float:
if (tryTextureIntrinsic(N))
return;
break;
case NVPTXISD::Suld1DI8Clamp:
case NVPTXISD::Suld1DI16Clamp:
case NVPTXISD::Suld1DI32Clamp:
case NVPTXISD::Suld1DI64Clamp:
case NVPTXISD::Suld1DV2I8Clamp:
case NVPTXISD::Suld1DV2I16Clamp:
case NVPTXISD::Suld1DV2I32Clamp:
case NVPTXISD::Suld1DV2I64Clamp:
case NVPTXISD::Suld1DV4I8Clamp:
case NVPTXISD::Suld1DV4I16Clamp:
case NVPTXISD::Suld1DV4I32Clamp:
case NVPTXISD::Suld1DArrayI8Clamp:
case NVPTXISD::Suld1DArrayI16Clamp:
case NVPTXISD::Suld1DArrayI32Clamp:
case NVPTXISD::Suld1DArrayI64Clamp:
case NVPTXISD::Suld1DArrayV2I8Clamp:
case NVPTXISD::Suld1DArrayV2I16Clamp:
case NVPTXISD::Suld1DArrayV2I32Clamp:
case NVPTXISD::Suld1DArrayV2I64Clamp:
case NVPTXISD::Suld1DArrayV4I8Clamp:
case NVPTXISD::Suld1DArrayV4I16Clamp:
case NVPTXISD::Suld1DArrayV4I32Clamp:
case NVPTXISD::Suld2DI8Clamp:
case NVPTXISD::Suld2DI16Clamp:
case NVPTXISD::Suld2DI32Clamp:
case NVPTXISD::Suld2DI64Clamp:
case NVPTXISD::Suld2DV2I8Clamp:
case NVPTXISD::Suld2DV2I16Clamp:
case NVPTXISD::Suld2DV2I32Clamp:
case NVPTXISD::Suld2DV2I64Clamp:
case NVPTXISD::Suld2DV4I8Clamp:
case NVPTXISD::Suld2DV4I16Clamp:
case NVPTXISD::Suld2DV4I32Clamp:
case NVPTXISD::Suld2DArrayI8Clamp:
case NVPTXISD::Suld2DArrayI16Clamp:
case NVPTXISD::Suld2DArrayI32Clamp:
case NVPTXISD::Suld2DArrayI64Clamp:
case NVPTXISD::Suld2DArrayV2I8Clamp:
case NVPTXISD::Suld2DArrayV2I16Clamp:
case NVPTXISD::Suld2DArrayV2I32Clamp:
case NVPTXISD::Suld2DArrayV2I64Clamp:
case NVPTXISD::Suld2DArrayV4I8Clamp:
case NVPTXISD::Suld2DArrayV4I16Clamp:
case NVPTXISD::Suld2DArrayV4I32Clamp:
case NVPTXISD::Suld3DI8Clamp:
case NVPTXISD::Suld3DI16Clamp:
case NVPTXISD::Suld3DI32Clamp:
case NVPTXISD::Suld3DI64Clamp:
case NVPTXISD::Suld3DV2I8Clamp:
case NVPTXISD::Suld3DV2I16Clamp:
case NVPTXISD::Suld3DV2I32Clamp:
case NVPTXISD::Suld3DV2I64Clamp:
case NVPTXISD::Suld3DV4I8Clamp:
case NVPTXISD::Suld3DV4I16Clamp:
case NVPTXISD::Suld3DV4I32Clamp:
case NVPTXISD::Suld1DI8Trap:
case NVPTXISD::Suld1DI16Trap:
case NVPTXISD::Suld1DI32Trap:
case NVPTXISD::Suld1DI64Trap:
case NVPTXISD::Suld1DV2I8Trap:
case NVPTXISD::Suld1DV2I16Trap:
case NVPTXISD::Suld1DV2I32Trap:
case NVPTXISD::Suld1DV2I64Trap:
case NVPTXISD::Suld1DV4I8Trap:
case NVPTXISD::Suld1DV4I16Trap:
case NVPTXISD::Suld1DV4I32Trap:
case NVPTXISD::Suld1DArrayI8Trap:
case NVPTXISD::Suld1DArrayI16Trap:
case NVPTXISD::Suld1DArrayI32Trap:
case NVPTXISD::Suld1DArrayI64Trap:
case NVPTXISD::Suld1DArrayV2I8Trap:
case NVPTXISD::Suld1DArrayV2I16Trap:
case NVPTXISD::Suld1DArrayV2I32Trap:
case NVPTXISD::Suld1DArrayV2I64Trap:
case NVPTXISD::Suld1DArrayV4I8Trap:
case NVPTXISD::Suld1DArrayV4I16Trap:
case NVPTXISD::Suld1DArrayV4I32Trap:
case NVPTXISD::Suld2DI8Trap:
case NVPTXISD::Suld2DI16Trap:
case NVPTXISD::Suld2DI32Trap:
case NVPTXISD::Suld2DI64Trap:
case NVPTXISD::Suld2DV2I8Trap:
case NVPTXISD::Suld2DV2I16Trap:
case NVPTXISD::Suld2DV2I32Trap:
case NVPTXISD::Suld2DV2I64Trap:
case NVPTXISD::Suld2DV4I8Trap:
case NVPTXISD::Suld2DV4I16Trap:
case NVPTXISD::Suld2DV4I32Trap:
case NVPTXISD::Suld2DArrayI8Trap:
case NVPTXISD::Suld2DArrayI16Trap:
case NVPTXISD::Suld2DArrayI32Trap:
case NVPTXISD::Suld2DArrayI64Trap:
case NVPTXISD::Suld2DArrayV2I8Trap:
case NVPTXISD::Suld2DArrayV2I16Trap:
case NVPTXISD::Suld2DArrayV2I32Trap:
case NVPTXISD::Suld2DArrayV2I64Trap:
case NVPTXISD::Suld2DArrayV4I8Trap:
case NVPTXISD::Suld2DArrayV4I16Trap:
case NVPTXISD::Suld2DArrayV4I32Trap:
case NVPTXISD::Suld3DI8Trap:
case NVPTXISD::Suld3DI16Trap:
case NVPTXISD::Suld3DI32Trap:
case NVPTXISD::Suld3DI64Trap:
case NVPTXISD::Suld3DV2I8Trap:
case NVPTXISD::Suld3DV2I16Trap:
case NVPTXISD::Suld3DV2I32Trap:
case NVPTXISD::Suld3DV2I64Trap:
case NVPTXISD::Suld3DV4I8Trap:
case NVPTXISD::Suld3DV4I16Trap:
case NVPTXISD::Suld3DV4I32Trap:
case NVPTXISD::Suld1DI8Zero:
case NVPTXISD::Suld1DI16Zero:
case NVPTXISD::Suld1DI32Zero:
case NVPTXISD::Suld1DI64Zero:
case NVPTXISD::Suld1DV2I8Zero:
case NVPTXISD::Suld1DV2I16Zero:
case NVPTXISD::Suld1DV2I32Zero:
case NVPTXISD::Suld1DV2I64Zero:
case NVPTXISD::Suld1DV4I8Zero:
case NVPTXISD::Suld1DV4I16Zero:
case NVPTXISD::Suld1DV4I32Zero:
case NVPTXISD::Suld1DArrayI8Zero:
case NVPTXISD::Suld1DArrayI16Zero:
case NVPTXISD::Suld1DArrayI32Zero:
case NVPTXISD::Suld1DArrayI64Zero:
case NVPTXISD::Suld1DArrayV2I8Zero:
case NVPTXISD::Suld1DArrayV2I16Zero:
case NVPTXISD::Suld1DArrayV2I32Zero:
case NVPTXISD::Suld1DArrayV2I64Zero:
case NVPTXISD::Suld1DArrayV4I8Zero:
case NVPTXISD::Suld1DArrayV4I16Zero:
case NVPTXISD::Suld1DArrayV4I32Zero:
case NVPTXISD::Suld2DI8Zero:
case NVPTXISD::Suld2DI16Zero:
case NVPTXISD::Suld2DI32Zero:
case NVPTXISD::Suld2DI64Zero:
case NVPTXISD::Suld2DV2I8Zero:
case NVPTXISD::Suld2DV2I16Zero:
case NVPTXISD::Suld2DV2I32Zero:
case NVPTXISD::Suld2DV2I64Zero:
case NVPTXISD::Suld2DV4I8Zero:
case NVPTXISD::Suld2DV4I16Zero:
case NVPTXISD::Suld2DV4I32Zero:
case NVPTXISD::Suld2DArrayI8Zero:
case NVPTXISD::Suld2DArrayI16Zero:
case NVPTXISD::Suld2DArrayI32Zero:
case NVPTXISD::Suld2DArrayI64Zero:
case NVPTXISD::Suld2DArrayV2I8Zero:
case NVPTXISD::Suld2DArrayV2I16Zero:
case NVPTXISD::Suld2DArrayV2I32Zero:
case NVPTXISD::Suld2DArrayV2I64Zero:
case NVPTXISD::Suld2DArrayV4I8Zero:
case NVPTXISD::Suld2DArrayV4I16Zero:
case NVPTXISD::Suld2DArrayV4I32Zero:
case NVPTXISD::Suld3DI8Zero:
case NVPTXISD::Suld3DI16Zero:
case NVPTXISD::Suld3DI32Zero:
case NVPTXISD::Suld3DI64Zero:
case NVPTXISD::Suld3DV2I8Zero:
case NVPTXISD::Suld3DV2I16Zero:
case NVPTXISD::Suld3DV2I32Zero:
case NVPTXISD::Suld3DV2I64Zero:
case NVPTXISD::Suld3DV4I8Zero:
case NVPTXISD::Suld3DV4I16Zero:
case NVPTXISD::Suld3DV4I32Zero:
if (trySurfaceIntrinsic(N))
return;
break;
case ISD::AND:
case ISD::SRA:
case ISD::SRL:
// Try to select BFE
if (tryBFE(N))
return;
break;
case ISD::ADDRSPACECAST:
SelectAddrSpaceCast(N);
return;
case ISD::ConstantFP:
if (tryConstantFP16(N))
return;
break;
default:
break;
}
SelectCode(N);
}
bool NVPTXDAGToDAGISel::tryIntrinsicChain(SDNode *N) {
unsigned IID = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
switch (IID) {
default:
return false;
case Intrinsic::nvvm_ldg_global_f:
case Intrinsic::nvvm_ldg_global_i:
case Intrinsic::nvvm_ldg_global_p:
case Intrinsic::nvvm_ldu_global_f:
case Intrinsic::nvvm_ldu_global_i:
case Intrinsic::nvvm_ldu_global_p:
return tryLDGLDU(N);
}
}
// There's no way to specify FP16 immediates in .f16 ops, so we have to
// load them into an .f16 register first.
bool NVPTXDAGToDAGISel::tryConstantFP16(SDNode *N) {
if (N->getValueType(0) != MVT::f16)
return false;
SDValue Val = CurDAG->getTargetConstantFP(
cast<ConstantFPSDNode>(N)->getValueAPF(), SDLoc(N), MVT::f16);
SDNode *LoadConstF16 =
CurDAG->getMachineNode(NVPTX::LOAD_CONST_F16, SDLoc(N), MVT::f16, Val);
ReplaceNode(N, LoadConstF16);
return true;
}
// Map ISD:CONDCODE value to appropriate CmpMode expected by
// NVPTXInstPrinter::printCmpMode()
static unsigned getPTXCmpMode(const CondCodeSDNode &CondCode, bool FTZ) {
using NVPTX::PTXCmpMode::CmpMode;
unsigned PTXCmpMode = [](ISD::CondCode CC) {
switch (CC) {
default:
llvm_unreachable("Unexpected condition code.");
case ISD::SETOEQ:
return CmpMode::EQ;
case ISD::SETOGT:
return CmpMode::GT;
case ISD::SETOGE:
return CmpMode::GE;
case ISD::SETOLT:
return CmpMode::LT;
case ISD::SETOLE:
return CmpMode::LE;
case ISD::SETONE:
return CmpMode::NE;
case ISD::SETO:
return CmpMode::NUM;
case ISD::SETUO:
return CmpMode::NotANumber;
case ISD::SETUEQ:
return CmpMode::EQU;
case ISD::SETUGT:
return CmpMode::GTU;
case ISD::SETUGE:
return CmpMode::GEU;
case ISD::SETULT:
return CmpMode::LTU;
case ISD::SETULE:
return CmpMode::LEU;
case ISD::SETUNE:
return CmpMode::NEU;
case ISD::SETEQ:
return CmpMode::EQ;
case ISD::SETGT:
return CmpMode::GT;
case ISD::SETGE:
return CmpMode::GE;
case ISD::SETLT:
return CmpMode::LT;
case ISD::SETLE:
return CmpMode::LE;
case ISD::SETNE:
return CmpMode::NE;
}
}(CondCode.get());
if (FTZ)
PTXCmpMode |= NVPTX::PTXCmpMode::FTZ_FLAG;
return PTXCmpMode;
}
bool NVPTXDAGToDAGISel::SelectSETP_F16X2(SDNode *N) {
unsigned PTXCmpMode =
getPTXCmpMode(*cast<CondCodeSDNode>(N->getOperand(2)), useF32FTZ());
SDLoc DL(N);
SDNode *SetP = CurDAG->getMachineNode(
NVPTX::SETP_f16x2rr, DL, MVT::i1, MVT::i1, N->getOperand(0),
N->getOperand(1), CurDAG->getTargetConstant(PTXCmpMode, DL, MVT::i32));
ReplaceNode(N, SetP);
return true;
}
// Find all instances of extract_vector_elt that use this v2f16 vector
// and coalesce them into a scattering move instruction.
bool NVPTXDAGToDAGISel::tryEXTRACT_VECTOR_ELEMENT(SDNode *N) {
SDValue Vector = N->getOperand(0);
// We only care about f16x2 as it's the only real vector type we
// need to deal with.
if (Vector.getSimpleValueType() != MVT::v2f16)
return false;
// Find and record all uses of this vector that extract element 0 or 1.
SmallVector<SDNode *, 4> E0, E1;
for (auto *U : Vector.getNode()->uses()) {
if (U->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
continue;
if (U->getOperand(0) != Vector)
continue;
if (const ConstantSDNode *IdxConst =
dyn_cast<ConstantSDNode>(U->getOperand(1))) {
if (IdxConst->getZExtValue() == 0)
E0.push_back(U);
else if (IdxConst->getZExtValue() == 1)
E1.push_back(U);
else
llvm_unreachable("Invalid vector index.");
}
}
// There's no point scattering f16x2 if we only ever access one
// element of it.
if (E0.empty() || E1.empty())
return false;
unsigned Op = NVPTX::SplitF16x2;
// If the vector has been BITCAST'ed from i32, we can use original
// value directly and avoid register-to-register move.
SDValue Source = Vector;
if (Vector->getOpcode() == ISD::BITCAST) {
Op = NVPTX::SplitI32toF16x2;
Source = Vector->getOperand(0);
}
// Merge (f16 extractelt(V, 0), f16 extractelt(V,1))
// into f16,f16 SplitF16x2(V)
SDNode *ScatterOp =
CurDAG->getMachineNode(Op, SDLoc(N), MVT::f16, MVT::f16, Source);
for (auto *Node : E0)
ReplaceUses(SDValue(Node, 0), SDValue(ScatterOp, 0));
for (auto *Node : E1)
ReplaceUses(SDValue(Node, 0), SDValue(ScatterOp, 1));
return true;
}
static unsigned int getCodeAddrSpace(MemSDNode *N) {
const Value *Src = N->getMemOperand()->getValue();
if (!Src)
return NVPTX::PTXLdStInstCode::GENERIC;
if (auto *PT = dyn_cast<PointerType>(Src->getType())) {
switch (PT->getAddressSpace()) {
case llvm::ADDRESS_SPACE_LOCAL: return NVPTX::PTXLdStInstCode::LOCAL;
case llvm::ADDRESS_SPACE_GLOBAL: return NVPTX::PTXLdStInstCode::GLOBAL;
case llvm::ADDRESS_SPACE_SHARED: return NVPTX::PTXLdStInstCode::SHARED;
case llvm::ADDRESS_SPACE_GENERIC: return NVPTX::PTXLdStInstCode::GENERIC;
case llvm::ADDRESS_SPACE_PARAM: return NVPTX::PTXLdStInstCode::PARAM;
case llvm::ADDRESS_SPACE_CONST: return NVPTX::PTXLdStInstCode::CONSTANT;
default: break;
}
}
return NVPTX::PTXLdStInstCode::GENERIC;
}
static bool canLowerToLDG(MemSDNode *N, const NVPTXSubtarget &Subtarget,
unsigned CodeAddrSpace, MachineFunction *F) {
// We use ldg (i.e. ld.global.nc) for invariant loads from the global address
// space.
//
// We have two ways of identifying invariant loads: Loads may be explicitly
// marked as invariant, or we may infer them to be invariant.
//
// We currently infer invariance for loads from
// - constant global variables, and
// - kernel function pointer params that are noalias (i.e. __restrict) and
// never written to.
//
// TODO: Perform a more powerful invariance analysis (ideally IPO, and ideally
// not during the SelectionDAG phase).
//
// TODO: Infer invariance only at -O2. We still want to use ldg at -O0 for
// explicitly invariant loads because these are how clang tells us to use ldg
// when the user uses a builtin.
if (!Subtarget.hasLDG() || CodeAddrSpace != NVPTX::PTXLdStInstCode::GLOBAL)
return false;
if (N->isInvariant())
return true;
bool IsKernelFn = isKernelFunction(F->getFunction());
// We use getUnderlyingObjects() here instead of getUnderlyingObject() mainly
// because the former looks through phi nodes while the latter does not. We
// need to look through phi nodes to handle pointer induction variables.
SmallVector<const Value *, 8> Objs;
getUnderlyingObjects(N->getMemOperand()->getValue(), Objs);
return all_of(Objs, [&](const Value *V) {
if (auto *A = dyn_cast<const Argument>(V))
return IsKernelFn && A->onlyReadsMemory() && A->hasNoAliasAttr();
if (auto *GV = dyn_cast<const GlobalVariable>(V))
return GV->isConstant();
return false;
});
}
bool NVPTXDAGToDAGISel::tryIntrinsicNoChain(SDNode *N) {
unsigned IID = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
switch (IID) {
default:
return false;
case Intrinsic::nvvm_texsurf_handle_internal:
SelectTexSurfHandle(N);
return true;
}
}
void NVPTXDAGToDAGISel::SelectTexSurfHandle(SDNode *N) {
// Op 0 is the intrinsic ID
SDValue Wrapper = N->getOperand(1);
SDValue GlobalVal = Wrapper.getOperand(0);
ReplaceNode(N, CurDAG->getMachineNode(NVPTX::texsurf_handles, SDLoc(N),
MVT::i64, GlobalVal));
}
void NVPTXDAGToDAGISel::SelectAddrSpaceCast(SDNode *N) {
SDValue Src = N->getOperand(0);
AddrSpaceCastSDNode *CastN = cast<AddrSpaceCastSDNode>(N);
unsigned SrcAddrSpace = CastN->getSrcAddressSpace();
unsigned DstAddrSpace = CastN->getDestAddressSpace();
assert(SrcAddrSpace != DstAddrSpace &&
"addrspacecast must be between different address spaces");
if (DstAddrSpace == ADDRESS_SPACE_GENERIC) {
// Specific to generic
unsigned Opc;
switch (SrcAddrSpace) {
default: report_fatal_error("Bad address space in addrspacecast");
case ADDRESS_SPACE_GLOBAL:
Opc = TM.is64Bit() ? NVPTX::cvta_global_yes_64 : NVPTX::cvta_global_yes;
break;
case ADDRESS_SPACE_SHARED:
Opc = TM.is64Bit() ? (useShortPointers() ? NVPTX::cvta_shared_yes_6432
: NVPTX::cvta_shared_yes_64)
: NVPTX::cvta_shared_yes;
break;
case ADDRESS_SPACE_CONST:
Opc = TM.is64Bit() ? (useShortPointers() ? NVPTX::cvta_const_yes_6432
: NVPTX::cvta_const_yes_64)
: NVPTX::cvta_const_yes;
break;
case ADDRESS_SPACE_LOCAL:
Opc = TM.is64Bit() ? (useShortPointers() ? NVPTX::cvta_local_yes_6432
: NVPTX::cvta_local_yes_64)
: NVPTX::cvta_local_yes;
break;
}
ReplaceNode(N, CurDAG->getMachineNode(Opc, SDLoc(N), N->getValueType(0),
Src));
return;
} else {
// Generic to specific
if (SrcAddrSpace != 0)
report_fatal_error("Cannot cast between two non-generic address spaces");
unsigned Opc;
switch (DstAddrSpace) {
default: report_fatal_error("Bad address space in addrspacecast");
case ADDRESS_SPACE_GLOBAL:
Opc = TM.is64Bit() ? NVPTX::cvta_to_global_yes_64
: NVPTX::cvta_to_global_yes;
break;
case ADDRESS_SPACE_SHARED:
Opc = TM.is64Bit() ? (useShortPointers() ? NVPTX::cvta_to_shared_yes_3264
: NVPTX::cvta_to_shared_yes_64)
: NVPTX::cvta_to_shared_yes;
break;
case ADDRESS_SPACE_CONST:
Opc = TM.is64Bit() ? (useShortPointers() ? NVPTX::cvta_to_const_yes_3264
: NVPTX::cvta_to_const_yes_64)
: NVPTX::cvta_to_const_yes;
break;
case ADDRESS_SPACE_LOCAL:
Opc = TM.is64Bit() ? (useShortPointers() ? NVPTX::cvta_to_local_yes_3264
: NVPTX::cvta_to_local_yes_64)
: NVPTX::cvta_to_local_yes;
break;
case ADDRESS_SPACE_PARAM:
Opc = TM.is64Bit() ? NVPTX::nvvm_ptr_gen_to_param_64
: NVPTX::nvvm_ptr_gen_to_param;
break;
}
ReplaceNode(N, CurDAG->getMachineNode(Opc, SDLoc(N), N->getValueType(0),
Src));
return;
}
}
// Helper function template to reduce amount of boilerplate code for
// opcode selection.
static std::optional<unsigned>
pickOpcodeForVT(MVT::SimpleValueType VT, unsigned Opcode_i8,
unsigned Opcode_i16, unsigned Opcode_i32,
std::optional<unsigned> Opcode_i64, unsigned Opcode_f16,
unsigned Opcode_f16x2, unsigned Opcode_f32,
std::optional<unsigned> Opcode_f64) {
switch (VT) {
case MVT::i1:
case MVT::i8:
return Opcode_i8;
case MVT::i16:
return Opcode_i16;
case MVT::i32:
return Opcode_i32;
case MVT::i64:
return Opcode_i64;
case MVT::f16:
case MVT::bf16:
return Opcode_f16;
case MVT::v2f16:
case MVT::v2bf16:
return Opcode_f16x2;
case MVT::f32:
return Opcode_f32;
case MVT::f64:
return Opcode_f64;
default:
return std::nullopt;
}
}
static int getLdStRegType(EVT VT) {
if (VT.isFloatingPoint())
switch (VT.getSimpleVT().SimpleTy) {
case MVT::f16:
case MVT::bf16:
case MVT::v2f16:
case MVT::v2bf16:
return NVPTX::PTXLdStInstCode::Untyped;
default:
return NVPTX::PTXLdStInstCode::Float;
}
else
return NVPTX::PTXLdStInstCode::Unsigned;
}
bool NVPTXDAGToDAGISel::tryLoad(SDNode *N) {
SDLoc dl(N);
MemSDNode *LD = cast<MemSDNode>(N);
assert(LD->readMem() && "Expected load");
LoadSDNode *PlainLoad = dyn_cast<LoadSDNode>(N);
EVT LoadedVT = LD->getMemoryVT();
SDNode *NVPTXLD = nullptr;
// do not support pre/post inc/dec
if (PlainLoad && PlainLoad->isIndexed())
return false;
if (!LoadedVT.isSimple())
return false;
AtomicOrdering Ordering = LD->getSuccessOrdering();
// In order to lower atomic loads with stronger guarantees we would need to
// use load.acquire or insert fences. However these features were only added
// with PTX ISA 6.0 / sm_70.
// TODO: Check if we can actually use the new instructions and implement them.
if (isStrongerThanMonotonic(Ordering))
return false;
// Address Space Setting
unsigned int CodeAddrSpace = getCodeAddrSpace(LD);
if (canLowerToLDG(LD, *Subtarget, CodeAddrSpace, MF)) {
return tryLDGLDU(N);
}
unsigned int PointerSize =
CurDAG->getDataLayout().getPointerSizeInBits(LD->getAddressSpace());
// Volatile Setting
// - .volatile is only available for .global and .shared
// - .volatile has the same memory synchronization semantics as .relaxed.sys
bool isVolatile = LD->isVolatile() || Ordering == AtomicOrdering::Monotonic;
if (CodeAddrSpace != NVPTX::PTXLdStInstCode::GLOBAL &&
CodeAddrSpace != NVPTX::PTXLdStInstCode::SHARED &&
CodeAddrSpace != NVPTX::PTXLdStInstCode::GENERIC)
isVolatile = false;
// Type Setting: fromType + fromTypeWidth
//
// Sign : ISD::SEXTLOAD
// Unsign : ISD::ZEXTLOAD, ISD::NON_EXTLOAD or ISD::EXTLOAD and the
// type is integer
// Float : ISD::NON_EXTLOAD or ISD::EXTLOAD and the type is float
MVT SimpleVT = LoadedVT.getSimpleVT();
MVT ScalarVT = SimpleVT.getScalarType();
// Read at least 8 bits (predicates are stored as 8-bit values)
unsigned fromTypeWidth = std::max(8U, (unsigned)ScalarVT.getSizeInBits());
unsigned int fromType;
// Vector Setting
unsigned vecType = NVPTX::PTXLdStInstCode::Scalar;
if (SimpleVT.isVector()) {
assert((LoadedVT == MVT::v2f16 || LoadedVT == MVT::v2bf16) &&
"Unexpected vector type");
// v2f16/v2bf16 is loaded using ld.b32
fromTypeWidth = 32;
}
if (PlainLoad && (PlainLoad->getExtensionType() == ISD::SEXTLOAD))
fromType = NVPTX::PTXLdStInstCode::Signed;
else
fromType = getLdStRegType(ScalarVT);
// Create the machine instruction DAG
SDValue Chain = N->getOperand(0);
SDValue N1 = N->getOperand(1);
SDValue Addr;
SDValue Offset, Base;
std::optional<unsigned> Opcode;
MVT::SimpleValueType TargetVT = LD->getSimpleValueType(0).SimpleTy;
if (SelectDirectAddr(N1, Addr)) {
Opcode = pickOpcodeForVT(
TargetVT, NVPTX::LD_i8_avar, NVPTX::LD_i16_avar, NVPTX::LD_i32_avar,
NVPTX::LD_i64_avar, NVPTX::LD_f16_avar, NVPTX::LD_f16x2_avar,
NVPTX::LD_f32_avar, NVPTX::LD_f64_avar);
if (!Opcode)
return false;
SDValue Ops[] = { getI32Imm(isVolatile, dl), getI32Imm(CodeAddrSpace, dl),
getI32Imm(vecType, dl), getI32Imm(fromType, dl),
getI32Imm(fromTypeWidth, dl), Addr, Chain };
NVPTXLD = CurDAG->getMachineNode(*Opcode, dl, TargetVT, MVT::Other, Ops);
} else if (PointerSize == 64 ? SelectADDRsi64(N1.getNode(), N1, Base, Offset)
: SelectADDRsi(N1.getNode(), N1, Base, Offset)) {
Opcode = pickOpcodeForVT(TargetVT, NVPTX::LD_i8_asi, NVPTX::LD_i16_asi,
NVPTX::LD_i32_asi, NVPTX::LD_i64_asi,
NVPTX::LD_f16_asi, NVPTX::LD_f16x2_asi,
NVPTX::LD_f32_asi, NVPTX::LD_f64_asi);
if (!Opcode)
return false;
SDValue Ops[] = { getI32Imm(isVolatile, dl), getI32Imm(CodeAddrSpace, dl),
getI32Imm(vecType, dl), getI32Imm(fromType, dl),
getI32Imm(fromTypeWidth, dl), Base, Offset, Chain };
NVPTXLD = CurDAG->getMachineNode(*Opcode, dl, TargetVT, MVT::Other, Ops);
} else if (PointerSize == 64 ? SelectADDRri64(N1.getNode(), N1, Base, Offset)
: SelectADDRri(N1.getNode(), N1, Base, Offset)) {
if (PointerSize == 64)
Opcode = pickOpcodeForVT(
TargetVT, NVPTX::LD_i8_ari_64, NVPTX::LD_i16_ari_64,
NVPTX::LD_i32_ari_64, NVPTX::LD_i64_ari_64, NVPTX::LD_f16_ari_64,
NVPTX::LD_f16x2_ari_64, NVPTX::LD_f32_ari_64, NVPTX::LD_f64_ari_64);
else
Opcode = pickOpcodeForVT(
TargetVT, NVPTX::LD_i8_ari, NVPTX::LD_i16_ari, NVPTX::LD_i32_ari,
NVPTX::LD_i64_ari, NVPTX::LD_f16_ari, NVPTX::LD_f16x2_ari,
NVPTX::LD_f32_ari, NVPTX::LD_f64_ari);
if (!Opcode)
return false;
SDValue Ops[] = { getI32Imm(isVolatile, dl), getI32Imm(CodeAddrSpace, dl),
getI32Imm(vecType, dl), getI32Imm(fromType, dl),
getI32Imm(fromTypeWidth, dl), Base, Offset, Chain };
NVPTXLD = CurDAG->getMachineNode(*Opcode, dl, TargetVT, MVT::Other, Ops);
} else {
if (PointerSize == 64)
Opcode = pickOpcodeForVT(
TargetVT, NVPTX::LD_i8_areg_64, NVPTX::LD_i16_areg_64,
NVPTX::LD_i32_areg_64, NVPTX::LD_i64_areg_64, NVPTX::LD_f16_areg_64,
NVPTX::LD_f16x2_areg_64, NVPTX::LD_f32_areg_64,
NVPTX::LD_f64_areg_64);
else
Opcode = pickOpcodeForVT(
TargetVT, NVPTX::LD_i8_areg, NVPTX::LD_i16_areg, NVPTX::LD_i32_areg,
NVPTX::LD_i64_areg, NVPTX::LD_f16_areg, NVPTX::LD_f16x2_areg,
NVPTX::LD_f32_areg, NVPTX::LD_f64_areg);
if (!Opcode)
return false;
SDValue Ops[] = { getI32Imm(isVolatile, dl), getI32Imm(CodeAddrSpace, dl),
getI32Imm(vecType, dl), getI32Imm(fromType, dl),
getI32Imm(fromTypeWidth, dl), N1, Chain };
NVPTXLD = CurDAG->getMachineNode(*Opcode, dl, TargetVT, MVT::Other, Ops);
}
if (!NVPTXLD)
return false;