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/TargetLoweringObjectFileImpl.h"
26 #include "llvm/CodeGen/MachineModuleInfo.h"
27 #include "llvm/CodeGen/Passes.h"
28 #include "llvm/IR/Verifier.h"
29 #include "llvm/MC/MCAsmInfo.h"
30 #include "llvm/PassManager.h"
31 #include "llvm/Support/TargetRegistry.h"
32 #include "llvm/Support/raw_os_ostream.h"
33 #include "llvm/Transforms/IPO.h"
34 #include "llvm/Transforms/Scalar.h"
35 #include <llvm/CodeGen/Passes.h>
39 extern "C" void LLVMInitializeR600Target() {
40 // Register the target
41 RegisterTargetMachine<AMDGPUTargetMachine> X(TheAMDGPUTarget);
42 RegisterTargetMachine<GCNTargetMachine> Y(TheGCNTarget);
45 static ScheduleDAGInstrs *createR600MachineScheduler(MachineSchedContext *C) {
46 return new ScheduleDAGMILive(C, make_unique<R600SchedStrategy>());
49 static MachineSchedRegistry
50 SchedCustomRegistry("r600", "Run R600's custom scheduler",
51 createR600MachineScheduler);
53 static std::string computeDataLayout(StringRef TT) {
55 std::string Ret = "e-p:32:32";
57 if (Triple.getArch() == Triple::amdgcn) {
58 // 32-bit private, local, and region pointers. 64-bit global and constant.
59 Ret += "-p1:64:64-p2:64:64-p3:32:32-p4:64:64-p5:32:32-p24:64:64";
62 Ret += "-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256"
63 "-v512:512-v1024:1024-v2048:2048-n32:64";
68 AMDGPUTargetMachine::AMDGPUTargetMachine(const Target &T, StringRef TT,
69 StringRef CPU, StringRef FS,
70 TargetOptions Options, Reloc::Model RM,
72 CodeGenOpt::Level OptLevel)
73 : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OptLevel),
74 DL(computeDataLayout(TT)),
75 TLOF(new TargetLoweringObjectFileELF()),
76 Subtarget(TT, CPU, FS, *this), IntrinsicInfo() {
77 setRequiresStructuredCFG(true);
81 AMDGPUTargetMachine::~AMDGPUTargetMachine() {
86 class AMDGPUPassConfig : public TargetPassConfig {
88 AMDGPUPassConfig(AMDGPUTargetMachine *TM, PassManagerBase &PM)
89 : TargetPassConfig(TM, PM) {}
91 AMDGPUTargetMachine &getAMDGPUTargetMachine() const {
92 return getTM<AMDGPUTargetMachine>();
96 createMachineScheduler(MachineSchedContext *C) const override {
97 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
98 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS)
99 return createR600MachineScheduler(C);
103 void addIRPasses() override;
104 void addCodeGenPrepare() override;
105 bool addPreISel() override;
106 bool addInstSelector() override;
107 void addPreRegAlloc() override;
108 void addPostRegAlloc() override;
109 void addPreSched2() override;
110 void addPreEmitPass() override;
112 } // End of anonymous namespace
114 TargetPassConfig *AMDGPUTargetMachine::createPassConfig(PassManagerBase &PM) {
115 return new AMDGPUPassConfig(this, PM);
118 //===----------------------------------------------------------------------===//
119 // AMDGPU Analysis Pass Setup
120 //===----------------------------------------------------------------------===//
122 void AMDGPUTargetMachine::addAnalysisPasses(PassManagerBase &PM) {
123 PM.add(createAMDGPUTargetTransformInfoPass(this));
126 void AMDGPUPassConfig::addIRPasses() {
127 // Function calls are not supported, so make sure we inline everything.
128 addPass(createAMDGPUAlwaysInlinePass());
129 addPass(createAlwaysInlinerPass());
130 // We need to add the barrier noop pass, otherwise adding the function
131 // inlining pass will cause all of the PassConfigs passes to be run
132 // one function at a time, which means if we have a nodule with two
133 // functions, then we will generate code for the first function
134 // without ever running any passes on the second.
135 addPass(createBarrierNoopPass());
136 TargetPassConfig::addIRPasses();
139 void AMDGPUPassConfig::addCodeGenPrepare() {
140 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
141 if (ST.isPromoteAllocaEnabled()) {
142 addPass(createAMDGPUPromoteAlloca(ST));
143 addPass(createSROAPass());
146 TargetPassConfig::addCodeGenPrepare();
150 AMDGPUPassConfig::addPreISel() {
151 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
152 addPass(createFlattenCFGPass());
153 if (ST.IsIRStructurizerEnabled())
154 addPass(createStructurizeCFGPass());
155 if (ST.getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS) {
156 addPass(createSinkingPass());
157 addPass(createSITypeRewriter());
158 addPass(createSIAnnotateControlFlowPass());
160 addPass(createR600TextureIntrinsicsReplacer());
165 bool AMDGPUPassConfig::addInstSelector() {
166 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
168 addPass(createAMDGPUISelDag(getAMDGPUTargetMachine()));
170 if (ST.getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS) {
171 addPass(createSILowerI1CopiesPass());
172 addPass(createSIFixSGPRCopiesPass(*TM));
173 addPass(createSIFoldOperandsPass());
179 void AMDGPUPassConfig::addPreRegAlloc() {
180 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
182 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
183 addPass(createR600VectorRegMerger(*TM));
185 if (getOptLevel() > CodeGenOpt::None && ST.loadStoreOptEnabled()) {
186 // Don't do this with no optimizations since it throws away debug info by
187 // merging nonadjacent loads.
189 // This should be run after scheduling, but before register allocation. It
190 // also need extra copies to the address operand to be eliminated.
191 initializeSILoadStoreOptimizerPass(*PassRegistry::getPassRegistry());
192 insertPass(&MachineSchedulerID, &SILoadStoreOptimizerID);
195 addPass(createSIShrinkInstructionsPass(), false);
196 addPass(createSIFixSGPRLiveRangesPass(), false);
200 void AMDGPUPassConfig::addPostRegAlloc() {
201 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
203 if (ST.getGeneration() > AMDGPUSubtarget::NORTHERN_ISLANDS) {
204 addPass(createSIPrepareScratchRegs(), false);
205 addPass(createSIShrinkInstructionsPass(), false);
209 void AMDGPUPassConfig::addPreSched2() {
210 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
212 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS)
213 addPass(createR600EmitClauseMarkers(), false);
214 if (ST.isIfCvtEnabled())
215 addPass(&IfConverterID, false);
216 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS)
217 addPass(createR600ClauseMergePass(*TM), false);
218 if (ST.getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS) {
219 addPass(createSIInsertWaits(*TM), false);
223 void AMDGPUPassConfig::addPreEmitPass() {
224 const AMDGPUSubtarget &ST = TM->getSubtarget<AMDGPUSubtarget>();
225 if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
226 addPass(createAMDGPUCFGStructurizerPass(), false);
227 addPass(createR600ExpandSpecialInstrsPass(*TM), false);
228 addPass(&FinalizeMachineBundlesID, false);
229 addPass(createR600Packetizer(*TM), false);
230 addPass(createR600ControlFlowFinalizer(*TM), false);
232 addPass(createSILowerControlFlowPass(*TM), false);
237 //===----------------------------------------------------------------------===//
238 // GCN Target Machine (SI+)
239 //===----------------------------------------------------------------------===//
241 GCNTargetMachine::GCNTargetMachine(const Target &T, StringRef TT, StringRef FS,
242 StringRef CPU, TargetOptions Options, Reloc::Model RM,
243 CodeModel::Model CM, CodeGenOpt::Level OL) :
244 AMDGPUTargetMachine(T, TT, FS, CPU, Options, RM, CM, OL) { }