LLVM 17.0.0git
SPIRVSubtarget.cpp
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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"
18#include "SPIRVTargetMachine.h"
20#include "llvm/Support/Host.h"
21
22using 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.
31static bool isAtLeastVer(uint32_t Target, uint32_t VerToCompareTo) {
32 return Target == 0 || Target >= VerToCompareTo;
33}
34
35static 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
42SPIRVSubtarget::SPIRVSubtarget(const Triple &TT, const std::string &CPU,
43 const std::string &FS,
45 : SPIRVGenSubtargetInfo(TT, CPU, /*TuneCPU=*/CPU, FS),
46 PointerSize(computePointerSize(TT)), SPIRVVersion(0), OpenCLVersion(0),
47 InstrInfo(), FrameLowering(initSubtargetDependencies(CPU, FS)),
48 TLInfo(TM, *this) {
49 // The order of initialization is important.
50 initAvailableExtensions();
51 initAvailableExtInstSets();
52
53 GR = std::make_unique<SPIRVGlobalRegistry>(PointerSize);
54 CallLoweringInfo = std::make_unique<SPIRVCallLowering>(TLInfo, GR.get());
55 Legalizer = std::make_unique<SPIRVLegalizerInfo>(*this);
56 RegBankInfo = std::make_unique<SPIRVRegisterBankInfo>();
57 InstSelector.reset(
58 createSPIRVInstructionSelector(TM, *this, *RegBankInfo.get()));
59}
60
62 StringRef FS) {
63 ParseSubtargetFeatures(CPU, /*TuneCPU=*/CPU, FS);
64 if (SPIRVVersion == 0)
65 SPIRVVersion = 14;
66 if (OpenCLVersion == 0)
67 OpenCLVersion = 22;
68 return *this;
69}
70
71bool SPIRVSubtarget::canUseExtension(SPIRV::Extension::Extension E) const {
72 return AvailableExtensions.contains(E);
73}
74
76 SPIRV::InstructionSet::InstructionSet E) const {
77 return AvailableExtInstSets.contains(E);
78}
79
80bool SPIRVSubtarget::isAtLeastSPIRVVer(uint32_t VerToCompareTo) const {
81 return isAtLeastVer(SPIRVVersion, VerToCompareTo);
82}
83
84bool SPIRVSubtarget::isAtLeastOpenCLVer(uint32_t VerToCompareTo) const {
85 return isAtLeastVer(OpenCLVersion, VerToCompareTo);
86}
87
88// If the SPIR-V version is >= 1.4 we can call OpPtrEqual and OpPtrNotEqual.
90 return isAtLeastVer(SPIRVVersion, 14);
91}
92
93// TODO: use command line args for this rather than defaults.
94void SPIRVSubtarget::initAvailableExtensions() {
95 AvailableExtensions.clear();
96 if (!isOpenCLEnv())
97 return;
98 // A default extension for testing.
99 AvailableExtensions.insert(
100 SPIRV::Extension::SPV_KHR_no_integer_wrap_decoration);
101}
102
103// TODO: use command line args for this rather than just defaults.
104// Must have called initAvailableExtensions first.
105void SPIRVSubtarget::initAvailableExtInstSets() {
106 AvailableExtInstSets.clear();
107 if (!isOpenCLEnv())
108 AvailableExtInstSets.insert(SPIRV::InstructionSet::GLSL_std_450);
109 else
110 AvailableExtInstSets.insert(SPIRV::InstructionSet::OpenCL_std);
111
112 // Handle extended instruction sets from extensions.
113 if (canUseExtension(
114 SPIRV::Extension::SPV_AMD_shader_trinary_minmax_extension)) {
115 AvailableExtInstSets.insert(
116 SPIRV::InstructionSet::SPV_AMD_shader_trinary_minmax);
117 }
118}
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
const char LLVMTargetMachineRef TM
return InstrInfo
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
static bool isAtLeastVer(uint32_t Target, uint32_t VerToCompareTo)
static unsigned computePointerSize(const Triple &TT)
This header is deprecated in favour of llvm/TargetParser/Host.h.
SPIRVSubtarget & initSubtargetDependencies(StringRef CPU, StringRef FS)
bool isAtLeastOpenCLVer(uint32_t VerToCompareTo) const
bool canDirectlyComparePointers() const
bool isAtLeastSPIRVVer(uint32_t VerToCompareTo) const
bool isOpenCLEnv() const
void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS)
bool canUseExtInstSet(SPIRV::InstructionSet::InstructionSet E) const
SPIRVSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS, const SPIRVTargetMachine &TM)
bool canUseExtension(SPIRV::Extension::Extension E) const
void clear()
Definition: SmallSet.h:216
bool contains(const T &V) const
Check if the SmallSet contains the given element.
Definition: SmallSet.h:234
std::pair< const_iterator, bool > insert(const T &V)
insert - Insert an element into the set if it isn't already there.
Definition: SmallSet.h:177
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
Target - Wrapper for Target specific information.
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
InstructionSelector * createSPIRVInstructionSelector(const SPIRVTargetMachine &TM, const SPIRVSubtarget &Subtarget, const RegisterBankInfo &RBI)