1 //===-- SPIRVSubtarget.cpp - SPIR-V Subtarget Information ------*- C++ -*--===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements the SPIR-V specific subclass of TargetSubtargetInfo. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "SPIRVSubtarget.h" 14 #include "SPIRV.h" 15 #include "SPIRVGlobalRegistry.h" 16 #include "SPIRVLegalizerInfo.h" 17 #include "SPIRVRegisterBankInfo.h" 18 #include "SPIRVTargetMachine.h" 19 #include "llvm/MC/TargetRegistry.h" 20 #include "llvm/Support/Host.h" 21 22 using namespace llvm; 23 24 #define DEBUG_TYPE "spirv-subtarget" 25 26 #define GET_SUBTARGETINFO_TARGET_DESC 27 #define GET_SUBTARGETINFO_CTOR 28 #include "SPIRVGenSubtargetInfo.inc" 29 30 // Compare version numbers, but allow 0 to mean unspecified. 31 static bool isAtLeastVer(uint32_t Target, uint32_t VerToCompareTo) { 32 return Target == 0 || Target >= VerToCompareTo; 33 } 34 35 static unsigned computePointerSize(const Triple &TT) { 36 const auto Arch = TT.getArch(); 37 // TODO: unify this with pointers legalization. 38 assert(TT.isSPIRV()); 39 return Arch == Triple::spirv32 ? 32 : 64; 40 } 41 42 SPIRVSubtarget::SPIRVSubtarget(const Triple &TT, const std::string &CPU, 43 const std::string &FS, 44 const SPIRVTargetMachine &TM) 45 : SPIRVGenSubtargetInfo(TT, CPU, /*TuneCPU=*/CPU, FS), 46 PointerSize(computePointerSize(TT)), SPIRVVersion(0), InstrInfo(), 47 FrameLowering(initSubtargetDependencies(CPU, FS)), TLInfo(TM, *this) { 48 GR = std::make_unique<SPIRVGlobalRegistry>(PointerSize); 49 CallLoweringInfo = 50 std::make_unique<SPIRVCallLowering>(TLInfo, *this, GR.get()); 51 Legalizer = std::make_unique<SPIRVLegalizerInfo>(*this); 52 RegBankInfo = std::make_unique<SPIRVRegisterBankInfo>(); 53 InstSelector.reset( 54 createSPIRVInstructionSelector(TM, *this, *RegBankInfo.get())); 55 } 56 57 SPIRVSubtarget &SPIRVSubtarget::initSubtargetDependencies(StringRef CPU, 58 StringRef FS) { 59 ParseSubtargetFeatures(CPU, /*TuneCPU=*/CPU, FS); 60 if (SPIRVVersion == 0) 61 SPIRVVersion = 14; 62 return *this; 63 } 64 65 // If the SPIR-V version is >= 1.4 we can call OpPtrEqual and OpPtrNotEqual. 66 bool SPIRVSubtarget::canDirectlyComparePointers() const { 67 return isAtLeastVer(SPIRVVersion, 14); 68 } 69