1 //===-- AMDGPUAsmPrinter.cpp - AMDGPU assembly printer --------------------===//
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
7 //===----------------------------------------------------------------------===//
11 /// The AMDGPUAsmPrinter is used to print both assembly string and also binary
12 /// code. When passed an MCAsmStreamer it prints assembly and when passed
13 /// an MCObjectStreamer it outputs binary code.
15 //===----------------------------------------------------------------------===//
18 #include "AMDGPUAsmPrinter.h"
20 #include "AMDGPUSubtarget.h"
21 #include "AMDGPUTargetMachine.h"
22 #include "MCTargetDesc/AMDGPUInstPrinter.h"
23 #include "MCTargetDesc/AMDGPUMCTargetDesc.h"
24 #include "MCTargetDesc/AMDGPUTargetStreamer.h"
25 #include "R600AsmPrinter.h"
26 #include "R600Defines.h"
27 #include "R600MachineFunctionInfo.h"
28 #include "R600RegisterInfo.h"
29 #include "SIDefines.h"
30 #include "SIInstrInfo.h"
31 #include "SIMachineFunctionInfo.h"
32 #include "SIRegisterInfo.h"
33 #include "TargetInfo/AMDGPUTargetInfo.h"
34 #include "Utils/AMDGPUBaseInfo.h"
35 #include "llvm/BinaryFormat/ELF.h"
36 #include "llvm/CodeGen/MachineFrameInfo.h"
37 #include "llvm/IR/DiagnosticInfo.h"
38 #include "llvm/MC/MCAssembler.h"
39 #include "llvm/MC/MCContext.h"
40 #include "llvm/MC/MCSectionELF.h"
41 #include "llvm/MC/MCStreamer.h"
42 #include "llvm/Support/AMDGPUMetadata.h"
43 #include "llvm/Support/MathExtras.h"
44 #include "llvm/Support/TargetParser.h"
45 #include "llvm/Support/TargetRegistry.h"
46 #include "llvm/Target/TargetLoweringObjectFile.h"
49 using namespace llvm::AMDGPU;
50 using namespace llvm::AMDGPU::HSAMD;
52 // TODO: This should get the default rounding mode from the kernel. We just set
53 // the default here, but this could change if the OpenCL rounding mode pragmas
56 // The denormal mode here should match what is reported by the OpenCL runtime
57 // for the CL_FP_DENORM bit from CL_DEVICE_{HALF|SINGLE|DOUBLE}_FP_CONFIG, but
58 // can also be override to flush with the -cl-denorms-are-zero compiler flag.
60 // AMD OpenCL only sets flush none and reports CL_FP_DENORM for double
61 // precision, and leaves single precision to flush all and does not report
62 // CL_FP_DENORM for CL_DEVICE_SINGLE_FP_CONFIG. Mesa's OpenCL currently reports
63 // CL_FP_DENORM for both.
65 // FIXME: It seems some instructions do not support single precision denormals
66 // regardless of the mode (exp_*_f32, rcp_*_f32, rsq_*_f32, rsq_*f32, sqrt_f32,
67 // and sin_f32, cos_f32 on most parts).
69 // We want to use these instructions, and using fp32 denormals also causes
70 // instructions to run at the double precision rate for the device so it's
71 // probably best to just report no single precision denormals.
72 static uint32_t getFPMode(AMDGPU::SIModeRegisterDefaults Mode) {
74 // TODO: Is there any real use for the flush in only / flush out only modes?
75 uint32_t FP32Denormals =
76 Mode.FP32Denormals ? FP_DENORM_FLUSH_NONE : FP_DENORM_FLUSH_IN_FLUSH_OUT;
78 uint32_t FP64Denormals =
79 Mode.FP64FP16Denormals ? FP_DENORM_FLUSH_NONE : FP_DENORM_FLUSH_IN_FLUSH_OUT;
81 return FP_ROUND_MODE_SP(FP_ROUND_ROUND_TO_NEAREST) |
82 FP_ROUND_MODE_DP(FP_ROUND_ROUND_TO_NEAREST) |
83 FP_DENORM_MODE_SP(FP32Denormals) |
84 FP_DENORM_MODE_DP(FP64Denormals);
88 createAMDGPUAsmPrinterPass(TargetMachine &tm,
89 std::unique_ptr<MCStreamer> &&Streamer) {
90 return new AMDGPUAsmPrinter(tm, std::move(Streamer));
93 extern "C" void LLVM_EXTERNAL_VISIBILITY LLVMInitializeAMDGPUAsmPrinter() {
94 TargetRegistry::RegisterAsmPrinter(getTheAMDGPUTarget(),
95 llvm::createR600AsmPrinterPass);
96 TargetRegistry::RegisterAsmPrinter(getTheGCNTarget(),
97 createAMDGPUAsmPrinterPass);
100 AMDGPUAsmPrinter::AMDGPUAsmPrinter(TargetMachine &TM,
101 std::unique_ptr<MCStreamer> Streamer)
102 : AsmPrinter(TM, std::move(Streamer)) {
103 if (IsaInfo::hasCodeObjectV3(getGlobalSTI()))
104 HSAMetadataStream.reset(new MetadataStreamerV3());
106 HSAMetadataStream.reset(new MetadataStreamerV2());
109 StringRef AMDGPUAsmPrinter::getPassName() const {
110 return "AMDGPU Assembly Printer";
113 const MCSubtargetInfo *AMDGPUAsmPrinter::getGlobalSTI() const {
114 return TM.getMCSubtargetInfo();
117 AMDGPUTargetStreamer* AMDGPUAsmPrinter::getTargetStreamer() const {
120 return static_cast<AMDGPUTargetStreamer*>(OutStreamer->getTargetStreamer());
123 void AMDGPUAsmPrinter::EmitStartOfAsmFile(Module &M) {
124 if (IsaInfo::hasCodeObjectV3(getGlobalSTI())) {
125 std::string ExpectedTarget;
126 raw_string_ostream ExpectedTargetOS(ExpectedTarget);
127 IsaInfo::streamIsaVersion(getGlobalSTI(), ExpectedTargetOS);
129 getTargetStreamer()->EmitDirectiveAMDGCNTarget(ExpectedTarget);
132 if (TM.getTargetTriple().getOS() != Triple::AMDHSA &&
133 TM.getTargetTriple().getOS() != Triple::AMDPAL)
136 if (TM.getTargetTriple().getOS() == Triple::AMDHSA)
137 HSAMetadataStream->begin(M);
139 if (TM.getTargetTriple().getOS() == Triple::AMDPAL)
140 getTargetStreamer()->getPALMetadata()->readFromIR(M);
142 if (IsaInfo::hasCodeObjectV3(getGlobalSTI()))
145 // HSA emits NT_AMDGPU_HSA_CODE_OBJECT_VERSION for code objects v2.
146 if (TM.getTargetTriple().getOS() == Triple::AMDHSA)
147 getTargetStreamer()->EmitDirectiveHSACodeObjectVersion(2, 1);
149 // HSA and PAL emit NT_AMDGPU_HSA_ISA for code objects v2.
150 IsaVersion Version = getIsaVersion(getGlobalSTI()->getCPU());
151 getTargetStreamer()->EmitDirectiveHSACodeObjectISA(
152 Version.Major, Version.Minor, Version.Stepping, "AMD", "AMDGPU");
155 void AMDGPUAsmPrinter::EmitEndOfAsmFile(Module &M) {
156 // Following code requires TargetStreamer to be present.
157 if (!getTargetStreamer())
160 if (!IsaInfo::hasCodeObjectV3(getGlobalSTI())) {
161 // Emit ISA Version (NT_AMD_AMDGPU_ISA).
162 std::string ISAVersionString;
163 raw_string_ostream ISAVersionStream(ISAVersionString);
164 IsaInfo::streamIsaVersion(getGlobalSTI(), ISAVersionStream);
165 getTargetStreamer()->EmitISAVersion(ISAVersionStream.str());
168 // Emit HSA Metadata (NT_AMD_AMDGPU_HSA_METADATA).
169 if (TM.getTargetTriple().getOS() == Triple::AMDHSA) {
170 HSAMetadataStream->end();
171 bool Success = HSAMetadataStream->emitTo(*getTargetStreamer());
173 assert(Success && "Malformed HSA Metadata");
177 bool AMDGPUAsmPrinter::isBlockOnlyReachableByFallthrough(
178 const MachineBasicBlock *MBB) const {
179 if (!AsmPrinter::isBlockOnlyReachableByFallthrough(MBB))
185 // If this is a block implementing a long branch, an expression relative to
186 // the start of the block is needed. to the start of the block.
187 // XXX - Is there a smarter way to check this?
188 return (MBB->back().getOpcode() != AMDGPU::S_SETPC_B64);
191 void AMDGPUAsmPrinter::EmitFunctionBodyStart() {
192 const SIMachineFunctionInfo &MFI = *MF->getInfo<SIMachineFunctionInfo>();
193 if (!MFI.isEntryFunction())
196 const GCNSubtarget &STM = MF->getSubtarget<GCNSubtarget>();
197 const Function &F = MF->getFunction();
198 if (!STM.hasCodeObjectV3() && STM.isAmdHsaOrMesa(F) &&
199 (F.getCallingConv() == CallingConv::AMDGPU_KERNEL ||
200 F.getCallingConv() == CallingConv::SPIR_KERNEL)) {
201 amd_kernel_code_t KernelCode;
202 getAmdKernelCode(KernelCode, CurrentProgramInfo, *MF);
203 getTargetStreamer()->EmitAMDKernelCodeT(KernelCode);
206 if (STM.isAmdHsaOS())
207 HSAMetadataStream->emitKernel(*MF, CurrentProgramInfo);
210 void AMDGPUAsmPrinter::EmitFunctionBodyEnd() {
211 const SIMachineFunctionInfo &MFI = *MF->getInfo<SIMachineFunctionInfo>();
212 if (!MFI.isEntryFunction())
215 if (!IsaInfo::hasCodeObjectV3(getGlobalSTI()) ||
216 TM.getTargetTriple().getOS() != Triple::AMDHSA)
219 auto &Streamer = getTargetStreamer()->getStreamer();
220 auto &Context = Streamer.getContext();
221 auto &ObjectFileInfo = *Context.getObjectFileInfo();
222 auto &ReadOnlySection = *ObjectFileInfo.getReadOnlySection();
224 Streamer.PushSection();
225 Streamer.SwitchSection(&ReadOnlySection);
227 // CP microcode requires the kernel descriptor to be allocated on 64 byte
229 Streamer.EmitValueToAlignment(64, 0, 1, 0);
230 if (ReadOnlySection.getAlignment() < 64)
231 ReadOnlySection.setAlignment(Align(64));
233 const MCSubtargetInfo &STI = MF->getSubtarget();
235 SmallString<128> KernelName;
236 getNameWithPrefix(KernelName, &MF->getFunction());
237 getTargetStreamer()->EmitAmdhsaKernelDescriptor(
238 STI, KernelName, getAmdhsaKernelDescriptor(*MF, CurrentProgramInfo),
239 CurrentProgramInfo.NumVGPRsForWavesPerEU,
240 CurrentProgramInfo.NumSGPRsForWavesPerEU -
241 IsaInfo::getNumExtraSGPRs(&STI,
242 CurrentProgramInfo.VCCUsed,
243 CurrentProgramInfo.FlatUsed),
244 CurrentProgramInfo.VCCUsed, CurrentProgramInfo.FlatUsed,
247 Streamer.PopSection();
250 void AMDGPUAsmPrinter::EmitFunctionEntryLabel() {
251 if (IsaInfo::hasCodeObjectV3(getGlobalSTI()) &&
252 TM.getTargetTriple().getOS() == Triple::AMDHSA) {
253 AsmPrinter::EmitFunctionEntryLabel();
257 const SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
258 const GCNSubtarget &STM = MF->getSubtarget<GCNSubtarget>();
259 if (MFI->isEntryFunction() && STM.isAmdHsaOrMesa(MF->getFunction())) {
260 SmallString<128> SymbolName;
261 getNameWithPrefix(SymbolName, &MF->getFunction()),
262 getTargetStreamer()->EmitAMDGPUSymbolType(
263 SymbolName, ELF::STT_AMDGPU_HSA_KERNEL);
265 if (DumpCodeInstEmitter) {
266 // Disassemble function name label to text.
267 DisasmLines.push_back(MF->getName().str() + ":");
268 DisasmLineMaxLen = std::max(DisasmLineMaxLen, DisasmLines.back().size());
269 HexLines.push_back("");
272 AsmPrinter::EmitFunctionEntryLabel();
275 void AMDGPUAsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) {
276 if (DumpCodeInstEmitter && !isBlockOnlyReachableByFallthrough(&MBB)) {
277 // Write a line for the basic block label if it is not only fallthrough.
278 DisasmLines.push_back(
279 (Twine("BB") + Twine(getFunctionNumber())
280 + "_" + Twine(MBB.getNumber()) + ":").str());
281 DisasmLineMaxLen = std::max(DisasmLineMaxLen, DisasmLines.back().size());
282 HexLines.push_back("");
284 AsmPrinter::EmitBasicBlockStart(MBB);
287 void AMDGPUAsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
288 if (GV->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS) {
289 if (GV->hasInitializer() && !isa<UndefValue>(GV->getInitializer())) {
290 OutContext.reportError({},
291 Twine(GV->getName()) +
292 ": unsupported initializer for address space");
296 // LDS variables aren't emitted in HSA or PAL yet.
297 const Triple::OSType OS = TM.getTargetTriple().getOS();
298 if (OS == Triple::AMDHSA || OS == Triple::AMDPAL)
301 MCSymbol *GVSym = getSymbol(GV);
303 GVSym->redefineIfPossible();
304 if (GVSym->isDefined() || GVSym->isVariable())
305 report_fatal_error("symbol '" + Twine(GVSym->getName()) +
306 "' is already defined");
308 const DataLayout &DL = GV->getParent()->getDataLayout();
309 uint64_t Size = DL.getTypeAllocSize(GV->getValueType());
310 unsigned Align = GV->getAlignment();
314 EmitVisibility(GVSym, GV->getVisibility(), !GV->isDeclaration());
315 EmitLinkage(GV, GVSym);
316 if (auto TS = getTargetStreamer())
317 TS->emitAMDGPULDS(GVSym, Size, Align);
321 AsmPrinter::EmitGlobalVariable(GV);
324 bool AMDGPUAsmPrinter::doFinalization(Module &M) {
325 CallGraphResourceInfo.clear();
327 // Pad with s_code_end to help tools and guard against instruction prefetch
328 // causing stale data in caches. Arguably this should be done by the linker,
329 // which is why this isn't done for Mesa.
330 const MCSubtargetInfo &STI = *getGlobalSTI();
331 if (AMDGPU::isGFX10(STI) &&
332 (STI.getTargetTriple().getOS() == Triple::AMDHSA ||
333 STI.getTargetTriple().getOS() == Triple::AMDPAL)) {
334 OutStreamer->SwitchSection(getObjFileLowering().getTextSection());
335 getTargetStreamer()->EmitCodeEnd();
338 return AsmPrinter::doFinalization(M);
341 // Print comments that apply to both callable functions and entry points.
342 void AMDGPUAsmPrinter::emitCommonFunctionComments(
344 Optional<uint32_t> NumAGPR,
345 uint32_t TotalNumVGPR,
347 uint64_t ScratchSize,
349 const AMDGPUMachineFunction *MFI) {
350 OutStreamer->emitRawComment(" codeLenInByte = " + Twine(CodeSize), false);
351 OutStreamer->emitRawComment(" NumSgprs: " + Twine(NumSGPR), false);
352 OutStreamer->emitRawComment(" NumVgprs: " + Twine(NumVGPR), false);
354 OutStreamer->emitRawComment(" NumAgprs: " + Twine(*NumAGPR), false);
355 OutStreamer->emitRawComment(" TotalNumVgprs: " + Twine(TotalNumVGPR),
358 OutStreamer->emitRawComment(" ScratchSize: " + Twine(ScratchSize), false);
359 OutStreamer->emitRawComment(" MemoryBound: " + Twine(MFI->isMemoryBound()),
363 uint16_t AMDGPUAsmPrinter::getAmdhsaKernelCodeProperties(
364 const MachineFunction &MF) const {
365 const SIMachineFunctionInfo &MFI = *MF.getInfo<SIMachineFunctionInfo>();
366 uint16_t KernelCodeProperties = 0;
368 if (MFI.hasPrivateSegmentBuffer()) {
369 KernelCodeProperties |=
370 amdhsa::KERNEL_CODE_PROPERTY_ENABLE_SGPR_PRIVATE_SEGMENT_BUFFER;
372 if (MFI.hasDispatchPtr()) {
373 KernelCodeProperties |=
374 amdhsa::KERNEL_CODE_PROPERTY_ENABLE_SGPR_DISPATCH_PTR;
376 if (MFI.hasQueuePtr()) {
377 KernelCodeProperties |=
378 amdhsa::KERNEL_CODE_PROPERTY_ENABLE_SGPR_QUEUE_PTR;
380 if (MFI.hasKernargSegmentPtr()) {
381 KernelCodeProperties |=
382 amdhsa::KERNEL_CODE_PROPERTY_ENABLE_SGPR_KERNARG_SEGMENT_PTR;
384 if (MFI.hasDispatchID()) {
385 KernelCodeProperties |=
386 amdhsa::KERNEL_CODE_PROPERTY_ENABLE_SGPR_DISPATCH_ID;
388 if (MFI.hasFlatScratchInit()) {
389 KernelCodeProperties |=
390 amdhsa::KERNEL_CODE_PROPERTY_ENABLE_SGPR_FLAT_SCRATCH_INIT;
392 if (MF.getSubtarget<GCNSubtarget>().isWave32()) {
393 KernelCodeProperties |=
394 amdhsa::KERNEL_CODE_PROPERTY_ENABLE_WAVEFRONT_SIZE32;
397 return KernelCodeProperties;
400 amdhsa::kernel_descriptor_t AMDGPUAsmPrinter::getAmdhsaKernelDescriptor(
401 const MachineFunction &MF,
402 const SIProgramInfo &PI) const {
403 amdhsa::kernel_descriptor_t KernelDescriptor;
404 memset(&KernelDescriptor, 0x0, sizeof(KernelDescriptor));
406 assert(isUInt<32>(PI.ScratchSize));
407 assert(isUInt<32>(PI.ComputePGMRSrc1));
408 assert(isUInt<32>(PI.ComputePGMRSrc2));
410 KernelDescriptor.group_segment_fixed_size = PI.LDSSize;
411 KernelDescriptor.private_segment_fixed_size = PI.ScratchSize;
412 KernelDescriptor.compute_pgm_rsrc1 = PI.ComputePGMRSrc1;
413 KernelDescriptor.compute_pgm_rsrc2 = PI.ComputePGMRSrc2;
414 KernelDescriptor.kernel_code_properties = getAmdhsaKernelCodeProperties(MF);
416 return KernelDescriptor;
419 bool AMDGPUAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
420 CurrentProgramInfo = SIProgramInfo();
422 const AMDGPUMachineFunction *MFI = MF.getInfo<AMDGPUMachineFunction>();
424 // The starting address of all shader programs must be 256 bytes aligned.
425 // Regular functions just need the basic required instruction alignment.
426 MF.setAlignment(MFI->isEntryFunction() ? Align(256) : Align(4));
428 SetupMachineFunction(MF);
430 const GCNSubtarget &STM = MF.getSubtarget<GCNSubtarget>();
431 MCContext &Context = getObjFileLowering().getContext();
432 // FIXME: This should be an explicit check for Mesa.
433 if (!STM.isAmdHsaOS() && !STM.isAmdPalOS()) {
434 MCSectionELF *ConfigSection =
435 Context.getELFSection(".AMDGPU.config", ELF::SHT_PROGBITS, 0);
436 OutStreamer->SwitchSection(ConfigSection);
439 if (MFI->isEntryFunction()) {
440 getSIProgramInfo(CurrentProgramInfo, MF);
442 auto I = CallGraphResourceInfo.insert(
443 std::make_pair(&MF.getFunction(), SIFunctionResourceInfo()));
444 SIFunctionResourceInfo &Info = I.first->second;
445 assert(I.second && "should only be called once per function");
446 Info = analyzeResourceUsage(MF);
449 if (STM.isAmdPalOS())
450 EmitPALMetadata(MF, CurrentProgramInfo);
451 else if (!STM.isAmdHsaOS()) {
452 EmitProgramInfoSI(MF, CurrentProgramInfo);
455 DumpCodeInstEmitter = nullptr;
456 if (STM.dumpCode()) {
457 // For -dumpcode, get the assembler out of the streamer, even if it does
458 // not really want to let us have it. This only works with -filetype=obj.
459 bool SaveFlag = OutStreamer->getUseAssemblerInfoForParsing();
460 OutStreamer->setUseAssemblerInfoForParsing(true);
461 MCAssembler *Assembler = OutStreamer->getAssemblerPtr();
462 OutStreamer->setUseAssemblerInfoForParsing(SaveFlag);
464 DumpCodeInstEmitter = Assembler->getEmitterPtr();
469 DisasmLineMaxLen = 0;
474 MCSectionELF *CommentSection =
475 Context.getELFSection(".AMDGPU.csdata", ELF::SHT_PROGBITS, 0);
476 OutStreamer->SwitchSection(CommentSection);
478 if (!MFI->isEntryFunction()) {
479 OutStreamer->emitRawComment(" Function info:", false);
480 SIFunctionResourceInfo &Info = CallGraphResourceInfo[&MF.getFunction()];
481 emitCommonFunctionComments(
483 STM.hasMAIInsts() ? Info.NumAGPR : Optional<uint32_t>(),
484 Info.getTotalNumVGPRs(STM),
485 Info.getTotalNumSGPRs(MF.getSubtarget<GCNSubtarget>()),
486 Info.PrivateSegmentSize,
487 getFunctionCodeSize(MF), MFI);
491 OutStreamer->emitRawComment(" Kernel info:", false);
492 emitCommonFunctionComments(CurrentProgramInfo.NumArchVGPR,
494 ? CurrentProgramInfo.NumAccVGPR
495 : Optional<uint32_t>(),
496 CurrentProgramInfo.NumVGPR,
497 CurrentProgramInfo.NumSGPR,
498 CurrentProgramInfo.ScratchSize,
499 getFunctionCodeSize(MF), MFI);
501 OutStreamer->emitRawComment(
502 " FloatMode: " + Twine(CurrentProgramInfo.FloatMode), false);
503 OutStreamer->emitRawComment(
504 " IeeeMode: " + Twine(CurrentProgramInfo.IEEEMode), false);
505 OutStreamer->emitRawComment(
506 " LDSByteSize: " + Twine(CurrentProgramInfo.LDSSize) +
507 " bytes/workgroup (compile time only)", false);
509 OutStreamer->emitRawComment(
510 " SGPRBlocks: " + Twine(CurrentProgramInfo.SGPRBlocks), false);
511 OutStreamer->emitRawComment(
512 " VGPRBlocks: " + Twine(CurrentProgramInfo.VGPRBlocks), false);
514 OutStreamer->emitRawComment(
515 " NumSGPRsForWavesPerEU: " +
516 Twine(CurrentProgramInfo.NumSGPRsForWavesPerEU), false);
517 OutStreamer->emitRawComment(
518 " NumVGPRsForWavesPerEU: " +
519 Twine(CurrentProgramInfo.NumVGPRsForWavesPerEU), false);
521 OutStreamer->emitRawComment(
523 Twine(CurrentProgramInfo.Occupancy), false);
525 OutStreamer->emitRawComment(
526 " WaveLimiterHint : " + Twine(MFI->needsWaveLimiter()), false);
528 OutStreamer->emitRawComment(
529 " COMPUTE_PGM_RSRC2:USER_SGPR: " +
530 Twine(G_00B84C_USER_SGPR(CurrentProgramInfo.ComputePGMRSrc2)), false);
531 OutStreamer->emitRawComment(
532 " COMPUTE_PGM_RSRC2:TRAP_HANDLER: " +
533 Twine(G_00B84C_TRAP_HANDLER(CurrentProgramInfo.ComputePGMRSrc2)), false);
534 OutStreamer->emitRawComment(
535 " COMPUTE_PGM_RSRC2:TGID_X_EN: " +
536 Twine(G_00B84C_TGID_X_EN(CurrentProgramInfo.ComputePGMRSrc2)), false);
537 OutStreamer->emitRawComment(
538 " COMPUTE_PGM_RSRC2:TGID_Y_EN: " +
539 Twine(G_00B84C_TGID_Y_EN(CurrentProgramInfo.ComputePGMRSrc2)), false);
540 OutStreamer->emitRawComment(
541 " COMPUTE_PGM_RSRC2:TGID_Z_EN: " +
542 Twine(G_00B84C_TGID_Z_EN(CurrentProgramInfo.ComputePGMRSrc2)), false);
543 OutStreamer->emitRawComment(
544 " COMPUTE_PGM_RSRC2:TIDIG_COMP_CNT: " +
545 Twine(G_00B84C_TIDIG_COMP_CNT(CurrentProgramInfo.ComputePGMRSrc2)),
549 if (DumpCodeInstEmitter) {
551 OutStreamer->SwitchSection(
552 Context.getELFSection(".AMDGPU.disasm", ELF::SHT_NOTE, 0));
554 for (size_t i = 0; i < DisasmLines.size(); ++i) {
555 std::string Comment = "\n";
556 if (!HexLines[i].empty()) {
557 Comment = std::string(DisasmLineMaxLen - DisasmLines[i].size(), ' ');
558 Comment += " ; " + HexLines[i] + "\n";
561 OutStreamer->EmitBytes(StringRef(DisasmLines[i]));
562 OutStreamer->EmitBytes(StringRef(Comment));
569 uint64_t AMDGPUAsmPrinter::getFunctionCodeSize(const MachineFunction &MF) const {
570 const GCNSubtarget &STM = MF.getSubtarget<GCNSubtarget>();
571 const SIInstrInfo *TII = STM.getInstrInfo();
573 uint64_t CodeSize = 0;
575 for (const MachineBasicBlock &MBB : MF) {
576 for (const MachineInstr &MI : MBB) {
577 // TODO: CodeSize should account for multiple functions.
579 // TODO: Should we count size of debug info?
580 if (MI.isDebugInstr())
583 CodeSize += TII->getInstSizeInBytes(MI);
590 static bool hasAnyNonFlatUseOfReg(const MachineRegisterInfo &MRI,
591 const SIInstrInfo &TII,
593 for (const MachineOperand &UseOp : MRI.reg_operands(Reg)) {
594 if (!UseOp.isImplicit() || !TII.isFLAT(*UseOp.getParent()))
601 int32_t AMDGPUAsmPrinter::SIFunctionResourceInfo::getTotalNumSGPRs(
602 const GCNSubtarget &ST) const {
603 return NumExplicitSGPR + IsaInfo::getNumExtraSGPRs(&ST,
604 UsesVCC, UsesFlatScratch);
607 int32_t AMDGPUAsmPrinter::SIFunctionResourceInfo::getTotalNumVGPRs(
608 const GCNSubtarget &ST) const {
609 return std::max(NumVGPR, NumAGPR);
612 AMDGPUAsmPrinter::SIFunctionResourceInfo AMDGPUAsmPrinter::analyzeResourceUsage(
613 const MachineFunction &MF) const {
614 SIFunctionResourceInfo Info;
616 const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
617 const GCNSubtarget &ST = MF.getSubtarget<GCNSubtarget>();
618 const MachineFrameInfo &FrameInfo = MF.getFrameInfo();
619 const MachineRegisterInfo &MRI = MF.getRegInfo();
620 const SIInstrInfo *TII = ST.getInstrInfo();
621 const SIRegisterInfo &TRI = TII->getRegisterInfo();
623 Info.UsesFlatScratch = MRI.isPhysRegUsed(AMDGPU::FLAT_SCR_LO) ||
624 MRI.isPhysRegUsed(AMDGPU::FLAT_SCR_HI);
626 // Even if FLAT_SCRATCH is implicitly used, it has no effect if flat
627 // instructions aren't used to access the scratch buffer. Inline assembly may
630 // If we only have implicit uses of flat_scr on flat instructions, it is not
632 if (Info.UsesFlatScratch && !MFI->hasFlatScratchInit() &&
633 (!hasAnyNonFlatUseOfReg(MRI, *TII, AMDGPU::FLAT_SCR) &&
634 !hasAnyNonFlatUseOfReg(MRI, *TII, AMDGPU::FLAT_SCR_LO) &&
635 !hasAnyNonFlatUseOfReg(MRI, *TII, AMDGPU::FLAT_SCR_HI))) {
636 Info.UsesFlatScratch = false;
639 Info.HasDynamicallySizedStack = FrameInfo.hasVarSizedObjects();
640 Info.PrivateSegmentSize = FrameInfo.getStackSize();
641 if (MFI->isStackRealigned())
642 Info.PrivateSegmentSize += FrameInfo.getMaxAlignment();
645 Info.UsesVCC = MRI.isPhysRegUsed(AMDGPU::VCC_LO) ||
646 MRI.isPhysRegUsed(AMDGPU::VCC_HI);
648 // If there are no calls, MachineRegisterInfo can tell us the used register
650 // A tail call isn't considered a call for MachineFrameInfo's purposes.
651 if (!FrameInfo.hasCalls() && !FrameInfo.hasTailCall()) {
652 MCPhysReg HighestVGPRReg = AMDGPU::NoRegister;
653 for (MCPhysReg Reg : reverse(AMDGPU::VGPR_32RegClass.getRegisters())) {
654 if (MRI.isPhysRegUsed(Reg)) {
655 HighestVGPRReg = Reg;
660 if (ST.hasMAIInsts()) {
661 MCPhysReg HighestAGPRReg = AMDGPU::NoRegister;
662 for (MCPhysReg Reg : reverse(AMDGPU::AGPR_32RegClass.getRegisters())) {
663 if (MRI.isPhysRegUsed(Reg)) {
664 HighestAGPRReg = Reg;
668 Info.NumAGPR = HighestAGPRReg == AMDGPU::NoRegister ? 0 :
669 TRI.getHWRegIndex(HighestAGPRReg) + 1;
672 MCPhysReg HighestSGPRReg = AMDGPU::NoRegister;
673 for (MCPhysReg Reg : reverse(AMDGPU::SGPR_32RegClass.getRegisters())) {
674 if (MRI.isPhysRegUsed(Reg)) {
675 HighestSGPRReg = Reg;
680 // We found the maximum register index. They start at 0, so add one to get the
681 // number of registers.
682 Info.NumVGPR = HighestVGPRReg == AMDGPU::NoRegister ? 0 :
683 TRI.getHWRegIndex(HighestVGPRReg) + 1;
684 Info.NumExplicitSGPR = HighestSGPRReg == AMDGPU::NoRegister ? 0 :
685 TRI.getHWRegIndex(HighestSGPRReg) + 1;
690 int32_t MaxVGPR = -1;
691 int32_t MaxAGPR = -1;
692 int32_t MaxSGPR = -1;
693 uint64_t CalleeFrameSize = 0;
695 for (const MachineBasicBlock &MBB : MF) {
696 for (const MachineInstr &MI : MBB) {
697 // TODO: Check regmasks? Do they occur anywhere except calls?
698 for (const MachineOperand &MO : MI.operands()) {
706 Register Reg = MO.getReg();
709 case AMDGPU::EXEC_LO:
710 case AMDGPU::EXEC_HI:
713 case AMDGPU::SRC_SHARED_BASE:
714 case AMDGPU::SRC_SHARED_LIMIT:
715 case AMDGPU::SRC_PRIVATE_BASE:
716 case AMDGPU::SRC_PRIVATE_LIMIT:
717 case AMDGPU::SGPR_NULL:
720 case AMDGPU::SRC_POPS_EXITING_WAVE_ID:
721 llvm_unreachable("src_pops_exiting_wave_id should not be used");
723 case AMDGPU::NoRegister:
724 assert(MI.isDebugInstr());
733 case AMDGPU::FLAT_SCR:
734 case AMDGPU::FLAT_SCR_LO:
735 case AMDGPU::FLAT_SCR_HI:
738 case AMDGPU::XNACK_MASK:
739 case AMDGPU::XNACK_MASK_LO:
740 case AMDGPU::XNACK_MASK_HI:
741 llvm_unreachable("xnack_mask registers should not be used");
743 case AMDGPU::LDS_DIRECT:
744 llvm_unreachable("lds_direct register should not be used");
752 llvm_unreachable("trap handler registers should not be used");
754 case AMDGPU::SRC_VCCZ:
755 llvm_unreachable("src_vccz register should not be used");
757 case AMDGPU::SRC_EXECZ:
758 llvm_unreachable("src_execz register should not be used");
760 case AMDGPU::SRC_SCC:
761 llvm_unreachable("src_scc register should not be used");
767 if (AMDGPU::SReg_32RegClass.contains(Reg)) {
768 assert(!AMDGPU::TTMP_32RegClass.contains(Reg) &&
769 "trap handler registers should not be used");
772 } else if (AMDGPU::VGPR_32RegClass.contains(Reg)) {
775 } else if (AMDGPU::AGPR_32RegClass.contains(Reg)) {
779 } else if (AMDGPU::SReg_64RegClass.contains(Reg)) {
780 assert(!AMDGPU::TTMP_64RegClass.contains(Reg) &&
781 "trap handler registers should not be used");
784 } else if (AMDGPU::VReg_64RegClass.contains(Reg)) {
787 } else if (AMDGPU::AReg_64RegClass.contains(Reg)) {
791 } else if (AMDGPU::VReg_96RegClass.contains(Reg)) {
794 } else if (AMDGPU::SReg_96RegClass.contains(Reg)) {
797 } else if (AMDGPU::SReg_128RegClass.contains(Reg)) {
798 assert(!AMDGPU::TTMP_128RegClass.contains(Reg) &&
799 "trap handler registers should not be used");
802 } else if (AMDGPU::VReg_128RegClass.contains(Reg)) {
805 } else if (AMDGPU::AReg_128RegClass.contains(Reg)) {
809 } else if (AMDGPU::VReg_160RegClass.contains(Reg)) {
812 } else if (AMDGPU::SReg_160RegClass.contains(Reg)) {
815 } else if (AMDGPU::SReg_256RegClass.contains(Reg)) {
816 assert(!AMDGPU::TTMP_256RegClass.contains(Reg) &&
817 "trap handler registers should not be used");
820 } else if (AMDGPU::VReg_256RegClass.contains(Reg)) {
823 } else if (AMDGPU::SReg_512RegClass.contains(Reg)) {
824 assert(!AMDGPU::TTMP_512RegClass.contains(Reg) &&
825 "trap handler registers should not be used");
828 } else if (AMDGPU::VReg_512RegClass.contains(Reg)) {
831 } else if (AMDGPU::AReg_512RegClass.contains(Reg)) {
835 } else if (AMDGPU::SReg_1024RegClass.contains(Reg)) {
838 } else if (AMDGPU::VReg_1024RegClass.contains(Reg)) {
841 } else if (AMDGPU::AReg_1024RegClass.contains(Reg)) {
846 llvm_unreachable("Unknown register class");
848 unsigned HWReg = TRI.getHWRegIndex(Reg);
849 int MaxUsed = HWReg + Width - 1;
851 MaxSGPR = MaxUsed > MaxSGPR ? MaxUsed : MaxSGPR;
853 MaxAGPR = MaxUsed > MaxAGPR ? MaxUsed : MaxAGPR;
855 MaxVGPR = MaxUsed > MaxVGPR ? MaxUsed : MaxVGPR;
860 // Pseudo used just to encode the underlying global. Is there a better
861 // way to track this?
863 const MachineOperand *CalleeOp
864 = TII->getNamedOperand(MI, AMDGPU::OpName::callee);
865 const Function *Callee = cast<Function>(CalleeOp->getGlobal());
866 if (Callee->isDeclaration()) {
867 // If this is a call to an external function, we can't do much. Make
868 // conservative guesses.
870 // 48 SGPRs - vcc, - flat_scr, -xnack
872 47 - IsaInfo::getNumExtraSGPRs(&ST, true, ST.hasFlatAddressSpace());
873 MaxSGPR = std::max(MaxSGPR, MaxSGPRGuess);
874 MaxVGPR = std::max(MaxVGPR, 23);
875 MaxAGPR = std::max(MaxAGPR, 23);
877 CalleeFrameSize = std::max(CalleeFrameSize, UINT64_C(16384));
879 Info.UsesFlatScratch = ST.hasFlatAddressSpace();
880 Info.HasDynamicallySizedStack = true;
882 // We force CodeGen to run in SCC order, so the callee's register
883 // usage etc. should be the cumulative usage of all callees.
885 auto I = CallGraphResourceInfo.find(Callee);
886 if (I == CallGraphResourceInfo.end()) {
887 // Avoid crashing on undefined behavior with an illegal call to a
888 // kernel. If a callsite's calling convention doesn't match the
889 // function's, it's undefined behavior. If the callsite calling
890 // convention does match, that would have errored earlier.
891 // FIXME: The verifier shouldn't allow this.
892 if (AMDGPU::isEntryFunctionCC(Callee->getCallingConv()))
893 report_fatal_error("invalid call to entry function");
895 llvm_unreachable("callee should have been handled before caller");
898 MaxSGPR = std::max(I->second.NumExplicitSGPR - 1, MaxSGPR);
899 MaxVGPR = std::max(I->second.NumVGPR - 1, MaxVGPR);
900 MaxAGPR = std::max(I->second.NumAGPR - 1, MaxAGPR);
902 = std::max(I->second.PrivateSegmentSize, CalleeFrameSize);
903 Info.UsesVCC |= I->second.UsesVCC;
904 Info.UsesFlatScratch |= I->second.UsesFlatScratch;
905 Info.HasDynamicallySizedStack |= I->second.HasDynamicallySizedStack;
906 Info.HasRecursion |= I->second.HasRecursion;
909 if (!Callee->doesNotRecurse())
910 Info.HasRecursion = true;
915 Info.NumExplicitSGPR = MaxSGPR + 1;
916 Info.NumVGPR = MaxVGPR + 1;
917 Info.NumAGPR = MaxAGPR + 1;
918 Info.PrivateSegmentSize += CalleeFrameSize;
923 void AMDGPUAsmPrinter::getSIProgramInfo(SIProgramInfo &ProgInfo,
924 const MachineFunction &MF) {
925 SIFunctionResourceInfo Info = analyzeResourceUsage(MF);
926 const GCNSubtarget &STM = MF.getSubtarget<GCNSubtarget>();
928 ProgInfo.NumArchVGPR = Info.NumVGPR;
929 ProgInfo.NumAccVGPR = Info.NumAGPR;
930 ProgInfo.NumVGPR = Info.getTotalNumVGPRs(STM);
931 ProgInfo.NumSGPR = Info.NumExplicitSGPR;
932 ProgInfo.ScratchSize = Info.PrivateSegmentSize;
933 ProgInfo.VCCUsed = Info.UsesVCC;
934 ProgInfo.FlatUsed = Info.UsesFlatScratch;
935 ProgInfo.DynamicCallStack = Info.HasDynamicallySizedStack || Info.HasRecursion;
937 if (!isUInt<32>(ProgInfo.ScratchSize)) {
938 DiagnosticInfoStackSize DiagStackSize(MF.getFunction(),
939 ProgInfo.ScratchSize, DS_Error);
940 MF.getFunction().getContext().diagnose(DiagStackSize);
943 const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
945 // TODO(scott.linder): The calculations related to SGPR/VGPR blocks are
946 // duplicated in part in AMDGPUAsmParser::calculateGPRBlocks, and could be
948 unsigned ExtraSGPRs = IsaInfo::getNumExtraSGPRs(
949 &STM, ProgInfo.VCCUsed, ProgInfo.FlatUsed);
951 // Check the addressable register limit before we add ExtraSGPRs.
952 if (STM.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS &&
953 !STM.hasSGPRInitBug()) {
954 unsigned MaxAddressableNumSGPRs = STM.getAddressableNumSGPRs();
955 if (ProgInfo.NumSGPR > MaxAddressableNumSGPRs) {
956 // This can happen due to a compiler bug or when using inline asm.
957 LLVMContext &Ctx = MF.getFunction().getContext();
958 DiagnosticInfoResourceLimit Diag(MF.getFunction(),
959 "addressable scalar registers",
960 ProgInfo.NumSGPR, DS_Error,
962 MaxAddressableNumSGPRs);
964 ProgInfo.NumSGPR = MaxAddressableNumSGPRs - 1;
968 // Account for extra SGPRs and VGPRs reserved for debugger use.
969 ProgInfo.NumSGPR += ExtraSGPRs;
971 // Ensure there are enough SGPRs and VGPRs for wave dispatch, where wave
972 // dispatch registers are function args.
973 unsigned WaveDispatchNumSGPR = 0, WaveDispatchNumVGPR = 0;
974 for (auto &Arg : MF.getFunction().args()) {
975 unsigned NumRegs = (Arg.getType()->getPrimitiveSizeInBits() + 31) / 32;
976 if (Arg.hasAttribute(Attribute::InReg))
977 WaveDispatchNumSGPR += NumRegs;
979 WaveDispatchNumVGPR += NumRegs;
981 ProgInfo.NumSGPR = std::max(ProgInfo.NumSGPR, WaveDispatchNumSGPR);
982 ProgInfo.NumVGPR = std::max(ProgInfo.NumVGPR, WaveDispatchNumVGPR);
984 // Adjust number of registers used to meet default/requested minimum/maximum
985 // number of waves per execution unit request.
986 ProgInfo.NumSGPRsForWavesPerEU = std::max(
987 std::max(ProgInfo.NumSGPR, 1u), STM.getMinNumSGPRs(MFI->getMaxWavesPerEU()));
988 ProgInfo.NumVGPRsForWavesPerEU = std::max(
989 std::max(ProgInfo.NumVGPR, 1u), STM.getMinNumVGPRs(MFI->getMaxWavesPerEU()));
991 if (STM.getGeneration() <= AMDGPUSubtarget::SEA_ISLANDS ||
992 STM.hasSGPRInitBug()) {
993 unsigned MaxAddressableNumSGPRs = STM.getAddressableNumSGPRs();
994 if (ProgInfo.NumSGPR > MaxAddressableNumSGPRs) {
995 // This can happen due to a compiler bug or when using inline asm to use
996 // the registers which are usually reserved for vcc etc.
997 LLVMContext &Ctx = MF.getFunction().getContext();
998 DiagnosticInfoResourceLimit Diag(MF.getFunction(),
1000 ProgInfo.NumSGPR, DS_Error,
1002 MaxAddressableNumSGPRs);
1004 ProgInfo.NumSGPR = MaxAddressableNumSGPRs;
1005 ProgInfo.NumSGPRsForWavesPerEU = MaxAddressableNumSGPRs;
1009 if (STM.hasSGPRInitBug()) {
1011 AMDGPU::IsaInfo::FIXED_NUM_SGPRS_FOR_INIT_BUG;
1012 ProgInfo.NumSGPRsForWavesPerEU =
1013 AMDGPU::IsaInfo::FIXED_NUM_SGPRS_FOR_INIT_BUG;
1016 if (MFI->getNumUserSGPRs() > STM.getMaxNumUserSGPRs()) {
1017 LLVMContext &Ctx = MF.getFunction().getContext();
1018 DiagnosticInfoResourceLimit Diag(MF.getFunction(), "user SGPRs",
1019 MFI->getNumUserSGPRs(), DS_Error);
1023 if (MFI->getLDSSize() > static_cast<unsigned>(STM.getLocalMemorySize())) {
1024 LLVMContext &Ctx = MF.getFunction().getContext();
1025 DiagnosticInfoResourceLimit Diag(MF.getFunction(), "local memory",
1026 MFI->getLDSSize(), DS_Error);
1030 ProgInfo.SGPRBlocks = IsaInfo::getNumSGPRBlocks(
1031 &STM, ProgInfo.NumSGPRsForWavesPerEU);
1032 ProgInfo.VGPRBlocks = IsaInfo::getNumVGPRBlocks(
1033 &STM, ProgInfo.NumVGPRsForWavesPerEU);
1035 const SIModeRegisterDefaults Mode = MFI->getMode();
1037 // Set the value to initialize FP_ROUND and FP_DENORM parts of the mode
1039 ProgInfo.FloatMode = getFPMode(Mode);
1041 ProgInfo.IEEEMode = Mode.IEEE;
1043 // Make clamp modifier on NaN input returns 0.
1044 ProgInfo.DX10Clamp = Mode.DX10Clamp;
1046 unsigned LDSAlignShift;
1047 if (STM.getGeneration() < AMDGPUSubtarget::SEA_ISLANDS) {
1048 // LDS is allocated in 64 dword blocks.
1051 // LDS is allocated in 128 dword blocks.
1055 unsigned LDSSpillSize =
1056 MFI->getLDSWaveSpillSize() * MFI->getMaxFlatWorkGroupSize();
1058 ProgInfo.LDSSize = MFI->getLDSSize() + LDSSpillSize;
1059 ProgInfo.LDSBlocks =
1060 alignTo(ProgInfo.LDSSize, 1ULL << LDSAlignShift) >> LDSAlignShift;
1062 // Scratch is allocated in 256 dword blocks.
1063 unsigned ScratchAlignShift = 10;
1064 // We need to program the hardware with the amount of scratch memory that
1065 // is used by the entire wave. ProgInfo.ScratchSize is the amount of
1066 // scratch memory used per thread.
1067 ProgInfo.ScratchBlocks =
1068 alignTo(ProgInfo.ScratchSize * STM.getWavefrontSize(),
1069 1ULL << ScratchAlignShift) >>
1072 if (getIsaVersion(getGlobalSTI()->getCPU()).Major >= 10) {
1073 ProgInfo.WgpMode = STM.isCuModeEnabled() ? 0 : 1;
1074 ProgInfo.MemOrdered = 1;
1077 ProgInfo.ComputePGMRSrc1 =
1078 S_00B848_VGPRS(ProgInfo.VGPRBlocks) |
1079 S_00B848_SGPRS(ProgInfo.SGPRBlocks) |
1080 S_00B848_PRIORITY(ProgInfo.Priority) |
1081 S_00B848_FLOAT_MODE(ProgInfo.FloatMode) |
1082 S_00B848_PRIV(ProgInfo.Priv) |
1083 S_00B848_DX10_CLAMP(ProgInfo.DX10Clamp) |
1084 S_00B848_DEBUG_MODE(ProgInfo.DebugMode) |
1085 S_00B848_IEEE_MODE(ProgInfo.IEEEMode) |
1086 S_00B848_WGP_MODE(ProgInfo.WgpMode) |
1087 S_00B848_MEM_ORDERED(ProgInfo.MemOrdered);
1089 // 0 = X, 1 = XY, 2 = XYZ
1090 unsigned TIDIGCompCnt = 0;
1091 if (MFI->hasWorkItemIDZ())
1093 else if (MFI->hasWorkItemIDY())
1096 ProgInfo.ComputePGMRSrc2 =
1097 S_00B84C_SCRATCH_EN(ProgInfo.ScratchBlocks > 0) |
1098 S_00B84C_USER_SGPR(MFI->getNumUserSGPRs()) |
1099 // For AMDHSA, TRAP_HANDLER must be zero, as it is populated by the CP.
1100 S_00B84C_TRAP_HANDLER(STM.isAmdHsaOS() ? 0 : STM.isTrapHandlerEnabled()) |
1101 S_00B84C_TGID_X_EN(MFI->hasWorkGroupIDX()) |
1102 S_00B84C_TGID_Y_EN(MFI->hasWorkGroupIDY()) |
1103 S_00B84C_TGID_Z_EN(MFI->hasWorkGroupIDZ()) |
1104 S_00B84C_TG_SIZE_EN(MFI->hasWorkGroupInfo()) |
1105 S_00B84C_TIDIG_COMP_CNT(TIDIGCompCnt) |
1106 S_00B84C_EXCP_EN_MSB(0) |
1107 // For AMDHSA, LDS_SIZE must be zero, as it is populated by the CP.
1108 S_00B84C_LDS_SIZE(STM.isAmdHsaOS() ? 0 : ProgInfo.LDSBlocks) |
1109 S_00B84C_EXCP_EN(0);
1111 ProgInfo.Occupancy = STM.computeOccupancy(MF, ProgInfo.LDSSize,
1112 ProgInfo.NumSGPRsForWavesPerEU,
1113 ProgInfo.NumVGPRsForWavesPerEU);
1116 static unsigned getRsrcReg(CallingConv::ID CallConv) {
1118 default: LLVM_FALLTHROUGH;
1119 case CallingConv::AMDGPU_CS: return R_00B848_COMPUTE_PGM_RSRC1;
1120 case CallingConv::AMDGPU_LS: return R_00B528_SPI_SHADER_PGM_RSRC1_LS;
1121 case CallingConv::AMDGPU_HS: return R_00B428_SPI_SHADER_PGM_RSRC1_HS;
1122 case CallingConv::AMDGPU_ES: return R_00B328_SPI_SHADER_PGM_RSRC1_ES;
1123 case CallingConv::AMDGPU_GS: return R_00B228_SPI_SHADER_PGM_RSRC1_GS;
1124 case CallingConv::AMDGPU_VS: return R_00B128_SPI_SHADER_PGM_RSRC1_VS;
1125 case CallingConv::AMDGPU_PS: return R_00B028_SPI_SHADER_PGM_RSRC1_PS;
1129 void AMDGPUAsmPrinter::EmitProgramInfoSI(const MachineFunction &MF,
1130 const SIProgramInfo &CurrentProgramInfo) {
1131 const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
1132 unsigned RsrcReg = getRsrcReg(MF.getFunction().getCallingConv());
1134 if (AMDGPU::isCompute(MF.getFunction().getCallingConv())) {
1135 OutStreamer->EmitIntValue(R_00B848_COMPUTE_PGM_RSRC1, 4);
1137 OutStreamer->EmitIntValue(CurrentProgramInfo.ComputePGMRSrc1, 4);
1139 OutStreamer->EmitIntValue(R_00B84C_COMPUTE_PGM_RSRC2, 4);
1140 OutStreamer->EmitIntValue(CurrentProgramInfo.ComputePGMRSrc2, 4);
1142 OutStreamer->EmitIntValue(R_00B860_COMPUTE_TMPRING_SIZE, 4);
1143 OutStreamer->EmitIntValue(S_00B860_WAVESIZE(CurrentProgramInfo.ScratchBlocks), 4);
1145 // TODO: Should probably note flat usage somewhere. SC emits a "FlatPtr32 =
1146 // 0" comment but I don't see a corresponding field in the register spec.
1148 OutStreamer->EmitIntValue(RsrcReg, 4);
1149 OutStreamer->EmitIntValue(S_00B028_VGPRS(CurrentProgramInfo.VGPRBlocks) |
1150 S_00B028_SGPRS(CurrentProgramInfo.SGPRBlocks), 4);
1151 OutStreamer->EmitIntValue(R_0286E8_SPI_TMPRING_SIZE, 4);
1152 OutStreamer->EmitIntValue(
1153 S_0286E8_WAVESIZE(CurrentProgramInfo.ScratchBlocks), 4);
1156 if (MF.getFunction().getCallingConv() == CallingConv::AMDGPU_PS) {
1157 OutStreamer->EmitIntValue(R_00B02C_SPI_SHADER_PGM_RSRC2_PS, 4);
1158 OutStreamer->EmitIntValue(S_00B02C_EXTRA_LDS_SIZE(CurrentProgramInfo.LDSBlocks), 4);
1159 OutStreamer->EmitIntValue(R_0286CC_SPI_PS_INPUT_ENA, 4);
1160 OutStreamer->EmitIntValue(MFI->getPSInputEnable(), 4);
1161 OutStreamer->EmitIntValue(R_0286D0_SPI_PS_INPUT_ADDR, 4);
1162 OutStreamer->EmitIntValue(MFI->getPSInputAddr(), 4);
1165 OutStreamer->EmitIntValue(R_SPILLED_SGPRS, 4);
1166 OutStreamer->EmitIntValue(MFI->getNumSpilledSGPRs(), 4);
1167 OutStreamer->EmitIntValue(R_SPILLED_VGPRS, 4);
1168 OutStreamer->EmitIntValue(MFI->getNumSpilledVGPRs(), 4);
1171 // This is the equivalent of EmitProgramInfoSI above, but for when the OS type
1172 // is AMDPAL. It stores each compute/SPI register setting and other PAL
1173 // metadata items into the PALMD::Metadata, combining with any provided by the
1174 // frontend as LLVM metadata. Once all functions are written, the PAL metadata
1175 // is then written as a single block in the .note section.
1176 void AMDGPUAsmPrinter::EmitPALMetadata(const MachineFunction &MF,
1177 const SIProgramInfo &CurrentProgramInfo) {
1178 const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
1179 auto CC = MF.getFunction().getCallingConv();
1180 auto MD = getTargetStreamer()->getPALMetadata();
1182 MD->setEntryPoint(CC, MF.getFunction().getName());
1183 MD->setNumUsedVgprs(CC, CurrentProgramInfo.NumVGPRsForWavesPerEU);
1184 MD->setNumUsedSgprs(CC, CurrentProgramInfo.NumSGPRsForWavesPerEU);
1185 if (AMDGPU::isCompute(MF.getFunction().getCallingConv())) {
1186 MD->setRsrc1(CC, CurrentProgramInfo.ComputePGMRSrc1);
1187 MD->setRsrc2(CC, CurrentProgramInfo.ComputePGMRSrc2);
1189 MD->setRsrc1(CC, S_00B028_VGPRS(CurrentProgramInfo.VGPRBlocks) |
1190 S_00B028_SGPRS(CurrentProgramInfo.SGPRBlocks));
1191 if (CurrentProgramInfo.ScratchBlocks > 0)
1192 MD->setRsrc2(CC, S_00B84C_SCRATCH_EN(1));
1194 // ScratchSize is in bytes, 16 aligned.
1195 MD->setScratchSize(CC, alignTo(CurrentProgramInfo.ScratchSize, 16));
1196 if (MF.getFunction().getCallingConv() == CallingConv::AMDGPU_PS) {
1197 MD->setRsrc2(CC, S_00B02C_EXTRA_LDS_SIZE(CurrentProgramInfo.LDSBlocks));
1198 MD->setSpiPsInputEna(MFI->getPSInputEnable());
1199 MD->setSpiPsInputAddr(MFI->getPSInputAddr());
1202 const GCNSubtarget &STM = MF.getSubtarget<GCNSubtarget>();
1204 MD->setWave32(MF.getFunction().getCallingConv());
1207 // This is supposed to be log2(Size)
1208 static amd_element_byte_size_t getElementByteSizeValue(unsigned Size) {
1211 return AMD_ELEMENT_4_BYTES;
1213 return AMD_ELEMENT_8_BYTES;
1215 return AMD_ELEMENT_16_BYTES;
1217 llvm_unreachable("invalid private_element_size");
1221 void AMDGPUAsmPrinter::getAmdKernelCode(amd_kernel_code_t &Out,
1222 const SIProgramInfo &CurrentProgramInfo,
1223 const MachineFunction &MF) const {
1224 const Function &F = MF.getFunction();
1225 assert(F.getCallingConv() == CallingConv::AMDGPU_KERNEL ||
1226 F.getCallingConv() == CallingConv::SPIR_KERNEL);
1228 const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
1229 const GCNSubtarget &STM = MF.getSubtarget<GCNSubtarget>();
1231 AMDGPU::initDefaultAMDKernelCodeT(Out, &STM);
1233 Out.compute_pgm_resource_registers =
1234 CurrentProgramInfo.ComputePGMRSrc1 |
1235 (CurrentProgramInfo.ComputePGMRSrc2 << 32);
1236 Out.code_properties |= AMD_CODE_PROPERTY_IS_PTR64;
1238 if (CurrentProgramInfo.DynamicCallStack)
1239 Out.code_properties |= AMD_CODE_PROPERTY_IS_DYNAMIC_CALLSTACK;
1241 AMD_HSA_BITS_SET(Out.code_properties,
1242 AMD_CODE_PROPERTY_PRIVATE_ELEMENT_SIZE,
1243 getElementByteSizeValue(STM.getMaxPrivateElementSize()));
1245 if (MFI->hasPrivateSegmentBuffer()) {
1246 Out.code_properties |=
1247 AMD_CODE_PROPERTY_ENABLE_SGPR_PRIVATE_SEGMENT_BUFFER;
1250 if (MFI->hasDispatchPtr())
1251 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_DISPATCH_PTR;
1253 if (MFI->hasQueuePtr())
1254 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_QUEUE_PTR;
1256 if (MFI->hasKernargSegmentPtr())
1257 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_KERNARG_SEGMENT_PTR;
1259 if (MFI->hasDispatchID())
1260 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_DISPATCH_ID;
1262 if (MFI->hasFlatScratchInit())
1263 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_FLAT_SCRATCH_INIT;
1265 if (MFI->hasDispatchPtr())
1266 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_DISPATCH_PTR;
1268 if (STM.isXNACKEnabled())
1269 Out.code_properties |= AMD_CODE_PROPERTY_IS_XNACK_SUPPORTED;
1271 Align MaxKernArgAlign;
1272 Out.kernarg_segment_byte_size = STM.getKernArgSegmentSize(F, MaxKernArgAlign);
1273 Out.wavefront_sgpr_count = CurrentProgramInfo.NumSGPR;
1274 Out.workitem_vgpr_count = CurrentProgramInfo.NumVGPR;
1275 Out.workitem_private_segment_byte_size = CurrentProgramInfo.ScratchSize;
1276 Out.workgroup_group_segment_byte_size = CurrentProgramInfo.LDSSize;
1278 // kernarg_segment_alignment is specified as log of the alignment.
1279 // The minimum alignment is 16.
1280 Out.kernarg_segment_alignment = Log2(std::max(Align(16), MaxKernArgAlign));
1283 bool AMDGPUAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1284 const char *ExtraCode, raw_ostream &O) {
1285 // First try the generic code, which knows about modifiers like 'c' and 'n'.
1286 if (!AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O))
1289 if (ExtraCode && ExtraCode[0]) {
1290 if (ExtraCode[1] != 0)
1291 return true; // Unknown modifier.
1293 switch (ExtraCode[0]) {
1301 // TODO: Should be able to support other operand types like globals.
1302 const MachineOperand &MO = MI->getOperand(OpNo);
1304 AMDGPUInstPrinter::printRegOperand(MO.getReg(), O,
1305 *MF->getSubtarget().getRegisterInfo());