1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
//===-- 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 "SPIRVCommandLine.h"
#include "SPIRVGlobalRegistry.h"
#include "SPIRVLegalizerInfo.h"
#include "SPIRVRegisterBankInfo.h"
#include "SPIRVTargetMachine.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"
static cl::opt<bool>
SPVTranslatorCompat("translator-compatibility-mode",
cl::desc("SPIR-V Translator compatibility mode"),
cl::Optional, cl::init(false));
static cl::opt<std::set<SPIRV::Extension::Extension>, false,
SPIRVExtensionsParser>
Extensions("spirv-ext",
cl::desc("Specify list of enabled SPIR-V extensions"));
// Provides access to the cl::opt<...> `Extensions` variable from outside of the
// module.
void SPIRVSubtarget::addExtensionsToClOpt(
const std::set<SPIRV::Extension::Extension> &AllowList) {
Extensions.insert(AllowList.begin(), AllowList.end());
}
// Compare version numbers, but allow 0 to mean unspecified.
static bool isAtLeastVer(VersionTuple Target, VersionTuple VerToCompareTo) {
return Target.empty() || 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)), InstrInfo(),
FrameLowering(initSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
TargetTriple(TT) {
switch (TT.getSubArch()) {
case Triple::SPIRVSubArch_v10:
SPIRVVersion = VersionTuple(1, 0);
break;
case Triple::SPIRVSubArch_v11:
SPIRVVersion = VersionTuple(1, 1);
break;
case Triple::SPIRVSubArch_v12:
SPIRVVersion = VersionTuple(1, 2);
break;
case Triple::SPIRVSubArch_v13:
SPIRVVersion = VersionTuple(1, 3);
break;
case Triple::SPIRVSubArch_v14:
default:
SPIRVVersion = VersionTuple(1, 4);
break;
case Triple::SPIRVSubArch_v15:
SPIRVVersion = VersionTuple(1, 5);
break;
case Triple::SPIRVSubArch_v16:
SPIRVVersion = VersionTuple(1, 6);
break;
}
OpenCLVersion = VersionTuple(2, 2);
// Set the environment based on the target triple.
if (TargetTriple.getOS() == Triple::Vulkan)
Env = Shader;
else if (TargetTriple.getEnvironment() == Triple::OpenCL)
Env = Kernel;
else
Env = Unknown;
// The order of initialization is important.
initAvailableExtensions(Extensions);
initAvailableExtInstSets();
GR = std::make_unique<SPIRVGlobalRegistry>(PointerSize);
CallLoweringInfo = std::make_unique<SPIRVCallLowering>(TLInfo, GR.get());
InlineAsmInfo = std::make_unique<SPIRVInlineAsmLowering>(TLInfo);
Legalizer = std::make_unique<SPIRVLegalizerInfo>(*this);
RegBankInfo = std::make_unique<SPIRVRegisterBankInfo>();
InstSelector.reset(createSPIRVInstructionSelector(TM, *this, *RegBankInfo));
}
SPIRVSubtarget &SPIRVSubtarget::initSubtargetDependencies(StringRef CPU,
StringRef FS) {
ParseSubtargetFeatures(CPU, /*TuneCPU=*/CPU, FS);
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);
}
SPIRV::InstructionSet::InstructionSet
SPIRVSubtarget::getPreferredInstructionSet() const {
if (isShader())
return SPIRV::InstructionSet::GLSL_std_450;
else
return SPIRV::InstructionSet::OpenCL_std;
}
bool SPIRVSubtarget::isAtLeastSPIRVVer(VersionTuple VerToCompareTo) const {
return isAtLeastVer(SPIRVVersion, VerToCompareTo);
}
bool SPIRVSubtarget::isAtLeastOpenCLVer(VersionTuple VerToCompareTo) const {
if (isShader())
return false;
return isAtLeastVer(OpenCLVersion, VerToCompareTo);
}
// If the SPIR-V version is >= 1.4 we can call OpPtrEqual and OpPtrNotEqual.
// In SPIR-V Translator compatibility mode this feature is not available.
bool SPIRVSubtarget::canDirectlyComparePointers() const {
return !SPVTranslatorCompat && isAtLeastVer(SPIRVVersion, VersionTuple(1, 4));
}
void SPIRVSubtarget::accountForAMDShaderTrinaryMinmax() {
if (canUseExtension(
SPIRV::Extension::SPV_AMD_shader_trinary_minmax_extension)) {
AvailableExtInstSets.insert(
SPIRV::InstructionSet::SPV_AMD_shader_trinary_minmax);
}
}
// TODO: use command line args for this rather than just defaults.
// Must have called initAvailableExtensions first.
void SPIRVSubtarget::initAvailableExtInstSets() {
AvailableExtInstSets.clear();
if (isShader())
AvailableExtInstSets.insert(SPIRV::InstructionSet::GLSL_std_450);
else
AvailableExtInstSets.insert(SPIRV::InstructionSet::OpenCL_std);
// Handle extended instruction sets from extensions.
accountForAMDShaderTrinaryMinmax();
}
// Set available extensions after SPIRVSubtarget is created.
void SPIRVSubtarget::initAvailableExtensions(
const std::set<SPIRV::Extension::Extension> &AllowedExtIds) {
AvailableExtensions.clear();
AvailableExtensions.insert_range(AllowedExtIds);
accountForAMDShaderTrinaryMinmax();
}
|
