| //===-- SPIRVSubtarget.cpp - SPIR-V Subtarget Information ------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the SPIR-V specific subclass of TargetSubtargetInfo. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "SPIRVSubtarget.h" |
| #include "SPIRV.h" |
| #include "SPIRVGlobalRegistry.h" |
| #include "SPIRVLegalizerInfo.h" |
| #include "SPIRVRegisterBankInfo.h" |
| #include "SPIRVTargetMachine.h" |
| #include "llvm/MC/TargetRegistry.h" |
| #include "llvm/TargetParser/Host.h" |
| |
| using namespace llvm; |
| |
| #define DEBUG_TYPE "spirv-subtarget" |
| |
| #define GET_SUBTARGETINFO_TARGET_DESC |
| #define GET_SUBTARGETINFO_CTOR |
| #include "SPIRVGenSubtargetInfo.inc" |
| |
| cl::list<SPIRV::Extension::Extension> Extensions( |
| "spirv-extensions", cl::desc("SPIR-V extensions"), cl::ZeroOrMore, |
| cl::Hidden, |
| cl::values( |
| clEnumValN(SPIRV::Extension::SPV_INTEL_arbitrary_precision_integers, |
| "SPV_INTEL_arbitrary_precision_integers", |
| "Allows generating arbitrary width integer types"), |
| clEnumValN(SPIRV::Extension::SPV_INTEL_optnone, "SPV_INTEL_optnone", |
| "Adds OptNoneINTEL value for Function Control mask that " |
| "indicates a request to not optimize the function"), |
| clEnumValN(SPIRV::Extension::SPV_KHR_no_integer_wrap_decoration, |
| "SPV_KHR_no_integer_wrap_decoration", |
| "Adds decorations to indicate that a given instruction does " |
| "not cause integer wrapping"), |
| clEnumValN(SPIRV::Extension::SPV_KHR_expect_assume, |
| "SPV_KHR_expect_assume", |
| "Provides additional information to a compiler, similar to " |
| "the llvm.assume and llvm.expect intrinsics."), |
| clEnumValN(SPIRV::Extension::SPV_KHR_bit_instructions, |
| "SPV_KHR_bit_instructions", |
| "This enables bit instructions to be used by SPIR-V modules " |
| "without requiring the Shader capability"))); |
| |
| // Compare version numbers, but allow 0 to mean unspecified. |
| static bool isAtLeastVer(uint32_t Target, uint32_t VerToCompareTo) { |
| return Target == 0 || Target >= VerToCompareTo; |
| } |
| |
| SPIRVSubtarget::SPIRVSubtarget(const Triple &TT, const std::string &CPU, |
| const std::string &FS, |
| const SPIRVTargetMachine &TM) |
| : SPIRVGenSubtargetInfo(TT, CPU, /*TuneCPU=*/CPU, FS), |
| PointerSize(TM.getPointerSizeInBits(/* AS= */ 0)), SPIRVVersion(0), |
| OpenCLVersion(0), InstrInfo(), |
| FrameLowering(initSubtargetDependencies(CPU, FS)), TLInfo(TM, *this), |
| TargetTriple(TT) { |
| // The order of initialization is important. |
| initAvailableExtensions(); |
| initAvailableExtInstSets(); |
| |
| GR = std::make_unique<SPIRVGlobalRegistry>(PointerSize); |
| CallLoweringInfo = std::make_unique<SPIRVCallLowering>(TLInfo, GR.get()); |
| Legalizer = std::make_unique<SPIRVLegalizerInfo>(*this); |
| RegBankInfo = std::make_unique<SPIRVRegisterBankInfo>(); |
| InstSelector.reset( |
| createSPIRVInstructionSelector(TM, *this, *RegBankInfo.get())); |
| } |
| |
| SPIRVSubtarget &SPIRVSubtarget::initSubtargetDependencies(StringRef CPU, |
| StringRef FS) { |
| ParseSubtargetFeatures(CPU, /*TuneCPU=*/CPU, FS); |
| if (SPIRVVersion == 0) |
| SPIRVVersion = 14; |
| if (OpenCLVersion == 0) |
| OpenCLVersion = 22; |
| return *this; |
| } |
| |
| bool SPIRVSubtarget::canUseExtension(SPIRV::Extension::Extension E) const { |
| return AvailableExtensions.contains(E); |
| } |
| |
| bool SPIRVSubtarget::canUseExtInstSet( |
| SPIRV::InstructionSet::InstructionSet E) const { |
| return AvailableExtInstSets.contains(E); |
| } |
| |
| bool SPIRVSubtarget::isAtLeastSPIRVVer(uint32_t VerToCompareTo) const { |
| return isAtLeastVer(SPIRVVersion, VerToCompareTo); |
| } |
| |
| bool SPIRVSubtarget::isAtLeastOpenCLVer(uint32_t VerToCompareTo) const { |
| if (!isOpenCLEnv()) |
| return false; |
| return isAtLeastVer(OpenCLVersion, VerToCompareTo); |
| } |
| |
| // If the SPIR-V version is >= 1.4 we can call OpPtrEqual and OpPtrNotEqual. |
| bool SPIRVSubtarget::canDirectlyComparePointers() const { |
| return isAtLeastVer(SPIRVVersion, 14); |
| } |
| |
| void SPIRVSubtarget::initAvailableExtensions() { |
| AvailableExtensions.clear(); |
| if (!isOpenCLEnv()) |
| return; |
| |
| for (auto Extension : Extensions) |
| AvailableExtensions.insert(Extension); |
| } |
| |
| // TODO: use command line args for this rather than just defaults. |
| // Must have called initAvailableExtensions first. |
| void SPIRVSubtarget::initAvailableExtInstSets() { |
| AvailableExtInstSets.clear(); |
| if (!isOpenCLEnv()) |
| AvailableExtInstSets.insert(SPIRV::InstructionSet::GLSL_std_450); |
| else |
| AvailableExtInstSets.insert(SPIRV::InstructionSet::OpenCL_std); |
| |
| // Handle extended instruction sets from extensions. |
| if (canUseExtension( |
| SPIRV::Extension::SPV_AMD_shader_trinary_minmax_extension)) { |
| AvailableExtInstSets.insert( |
| SPIRV::InstructionSet::SPV_AMD_shader_trinary_minmax); |
| } |
| } |