1 //===-- AMDGPUTargetMachine.cpp - TargetMachine for hw codegen targets-----===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief The AMDGPU target machine contains all of the hardware specific
12 /// information needed to emit code for R600 and SI GPUs.
14 //===----------------------------------------------------------------------===//
16 #include "AMDGPUTargetMachine.h"
18 #include "R600ISelLowering.h"
19 #include "R600InstrInfo.h"
20 #include "R600MachineScheduler.h"
21 #include "SIISelLowering.h"
22 #include "SIInstrInfo.h"
23 #include "llvm/Analysis/Passes.h"
24 #include "llvm/CodeGen/MachineFunctionAnalysis.h"
25 #include "llvm/CodeGen/MachineModuleInfo.h"
26 #include "llvm/CodeGen/Passes.h"
27 #include "llvm/IR/Verifier.h"
28 #include "llvm/MC/MCAsmInfo.h"
29 #include "llvm/PassManager.h"
30 #include "llvm/Support/TargetRegistry.h"
31 #include "llvm/Support/raw_os_ostream.h"
32 #include "llvm/Transforms/IPO.h"
33 #include "llvm/Transforms/Scalar.h"
34 #include <llvm/CodeGen/Passes.h>
39 extern "C" void LLVMInitializeR600Target() {
40 // Register the target
41 RegisterTargetMachine<AMDGPUTargetMachine> X(TheAMDGPUTarget);
44 static ScheduleDAGInstrs *createR600MachineScheduler(MachineSchedContext *C) {
45 return new ScheduleDAGMILive(C, make_unique<R600SchedStrategy>());
48 static MachineSchedRegistry
49 SchedCustomRegistry("r600", "Run R600's custom scheduler",
50 createR600MachineScheduler);
52 static std::string computeDataLayout(const AMDGPUSubtarget &ST) {
53 std::string Ret = "e-p:32:32";
56 // 32-bit private, local, and region pointers. 64-bit global and constant.
57 Ret += "-p1:64:64-p2:64:64-p3:32:32-p4:64:64-p5:32:32-p24:64:64";
60 Ret += "-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256"
61 "-v512:512-v1024:1024-v2048:2048-n32:64";
66 AMDGPUTargetMachine::AMDGPUTargetMachine(const Target &T, StringRef TT,
67 StringRef CPU, StringRef FS,
68 TargetOptions Options,
69 Reloc::Model RM, CodeModel::Model CM,
70 CodeGenOpt::Level OptLevel
73 LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OptLevel),
74 Subtarget(TT, CPU, FS),
75 Layout(computeDataLayout(Subtarget)),
76 FrameLowering(TargetFrameLowering::StackGrowsUp,
77 64 * 16 // Maximum stack alignment (long16)
80 InstrItins(&Subtarget.getInstrItineraryData()) {
81 // TLInfo uses InstrInfo so it must be initialized after.
82 if (Subtarget.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
83 TLInfo.reset(new R600TargetLowering(*this));
85 TLInfo.reset(new SITargetLowering(*this));
87 setRequiresStructuredCFG(true);
91 AMDGPUTargetMachine::~AMDGPUTargetMachine() {
95 class AMDGPUPassConfig : public TargetPassConfig {
97 AMDGPUPassConfig(AMDGPUTargetMachine *TM, PassManagerBase &PM)
98 : TargetPassConfig(TM, PM) {}
100 AMDGPUTargetMachine &getAMDGPUTargetMachine() const {
101 return getTM<AMDGPUTargetMachine>();
105 createMachineScheduler(MachineSchedContext *C) const override {
106 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
107 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS)
108 return createR600MachineScheduler(C);
112 virtual void addCodeGenPrepare();
113 bool addPreISel() override;
114 bool addInstSelector() override;
115 bool addPreRegAlloc() override;
116 bool addPostRegAlloc() override;
117 bool addPreSched2() override;
118 bool addPreEmitPass() override;
120 } // End of anonymous namespace
122 TargetPassConfig *AMDGPUTargetMachine::createPassConfig(PassManagerBase &PM) {
123 return new AMDGPUPassConfig(this, PM);
126 //===----------------------------------------------------------------------===//
127 // AMDGPU Analysis Pass Setup
128 //===----------------------------------------------------------------------===//
130 void AMDGPUTargetMachine::addAnalysisPasses(PassManagerBase &PM) {
131 // Add first the target-independent BasicTTI pass, then our AMDGPU pass. This
132 // allows the AMDGPU pass to delegate to the target independent layer when
134 PM.add(createBasicTargetTransformInfoPass(this));
135 PM.add(createAMDGPUTargetTransformInfoPass(this));
138 void AMDGPUPassConfig::addCodeGenPrepare() {
139 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
140 addPass(createAMDGPUPromoteAlloca(ST));
141 addPass(createSROAPass());
142 TargetPassConfig::addCodeGenPrepare();
146 AMDGPUPassConfig::addPreISel() {
147 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
148 addPass(createFlattenCFGPass());
149 if (ST.IsIRStructurizerEnabled())
150 addPass(createStructurizeCFGPass());
151 if (ST.getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS) {
152 addPass(createSinkingPass());
153 addPass(createSITypeRewriter());
154 addPass(createSIAnnotateControlFlowPass());
156 addPass(createR600TextureIntrinsicsReplacer());
161 bool AMDGPUPassConfig::addInstSelector() {
162 addPass(createAMDGPUISelDag(getAMDGPUTargetMachine()));
163 addPass(createSILowerI1CopiesPass());
167 bool AMDGPUPassConfig::addPreRegAlloc() {
168 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
170 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
171 addPass(createR600VectorRegMerger(*TM));
173 addPass(createSIFixSGPRCopiesPass(*TM));
174 // SIFixSGPRCopies can generate a lot of duplicate instructions,
175 // so we need to run MachineCSE afterwards.
176 addPass(&MachineCSEID);
177 initializeSIFixSGPRLiveRangesPass(*PassRegistry::getPassRegistry());
178 insertPass(&RegisterCoalescerID, &SIFixSGPRLiveRangesID);
183 bool AMDGPUPassConfig::addPostRegAlloc() {
184 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
186 if (ST.getGeneration() > AMDGPUSubtarget::NORTHERN_ISLANDS) {
187 addPass(createSIInsertWaits(*TM));
192 bool AMDGPUPassConfig::addPreSched2() {
193 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
195 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS)
196 addPass(createR600EmitClauseMarkers());
197 if (ST.isIfCvtEnabled())
198 addPass(&IfConverterID);
199 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS)
200 addPass(createR600ClauseMergePass(*TM));
204 bool AMDGPUPassConfig::addPreEmitPass() {
205 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
206 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
207 addPass(createAMDGPUCFGStructurizerPass());
208 addPass(createR600ExpandSpecialInstrsPass(*TM));
209 addPass(&FinalizeMachineBundlesID);
210 addPass(createR600Packetizer(*TM));
211 addPass(createR600ControlFlowFinalizer(*TM));
213 addPass(createSILowerControlFlowPass(*TM));