AMDGPU/NFC: Minor clean ups in HSA metadata

[kzhuravl]

Summary

• Use HSA metadata streamer directly from AMDGPUAsmPrinter
• Make naming consistent with PAL metadata

[t-tye]

LGTM

include/llvm/Support/AMDGPUMetadata.h

struct Metadata final {
   std::vector<uint32_t> mVersion = std::vector<uint32_t>();
   /// \brief Printf metadata. Optional.
   std::vector<std::string> mPrintf = std::vector<std::string>();
   /// \brief Kernels metadata. Optional.
   std::vector<Kernel::Metadata> mKernels = std::vector<Kernel::Metadata>();
 
   /// \brief Default constructor.
   Metadata() = default;
-
-  /// \brief Converts \p YamlString to \p HSAMetadata.
-  static std::error_code fromYamlString(std::string YamlString,
-                                        Metadata &HSAMetadata);
-
-  /// \brief Converts \p HSAMetadata to \p YamlString.
-  static std::error_code toYamlString(Metadata HSAMetadata,
-                                      std::string &YamlString);
 };
 
+/// \brief Converts \p String to \p HSAMetadata.
+std::error_code fromString(std::string String, Metadata &HSAMetadata);
+
+/// \brief Converts \p HSAMetadata to \p String.
+std::error_code toString(Metadata HSAMetadata, std::string &String);
+
 } // end namespace HSAMD
 
 //===----------------------------------------------------------------------===//
 // PAL metadata.
 //===----------------------------------------------------------------------===//
 namespace PALMD {
 
 /// \brief PAL metadata assembler directive.

lib/Support/AMDGPUMetadata.cpp

struct MappingTraits<HSAMD::Metadata> {
   }
 };
 
 } // end namespace yaml
 
 namespace AMDGPU {
 namespace HSAMD {
 
-/* static */
-std::error_code Metadata::fromYamlString(
-    std::string YamlString, Metadata &HSAMetadata) {
-  yaml::Input YamlInput(YamlString);
+std::error_code fromString(std::string String, Metadata &HSAMetadata) {
+  yaml::Input YamlInput(String);
   YamlInput >> HSAMetadata;
   return YamlInput.error();
 }
 
-/* static */
-std::error_code Metadata::toYamlString(
-    Metadata HSAMetadata, std::string &YamlString) {
-  raw_string_ostream YamlStream(YamlString);
+std::error_code toString(Metadata HSAMetadata, std::string &String) {
+  raw_string_ostream YamlStream(String);
   yaml::Output YamlOutput(YamlStream, nullptr, std::numeric_limits<int>::max());
   YamlOutput << HSAMetadata;
   return std::error_code();
 }
 
 } // end namespace HSAMD
 
 namespace PALMD {

lib/Target/AMDGPU/AMDGPUAsmPrinter.h

 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H
 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H
 
 #include "AMDGPU.h"
 #include "AMDKernelCodeT.h"
+#include "MCTargetDesc/AMDGPUHSAMetadataStreamer.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/CodeGen/AsmPrinter.h"
 #include <cstddef>
 #include <cstdint>
 #include <limits>
 #include <memory>
 #include <string>
 #include <vector>
struct SIProgramInfo {
     // Bonus information for debugging.
     bool VCCUsed = false;
 
     SIProgramInfo() = default;
   };
 
   SIProgramInfo CurrentProgramInfo;
   DenseMap<const Function *, SIFunctionResourceInfo> CallGraphResourceInfo;
+
+  AMDGPU::HSAMD::MetadataStreamer HSAMetadataStream;
   std::map<uint32_t, uint32_t> PALMetadataMap;
 
   uint64_t getFunctionCodeSize(const MachineFunction &MF) const;
   SIFunctionResourceInfo analyzeResourceUsage(const MachineFunction &MF) const;
 
   void readPALMetadata(Module &M);
   void getSIProgramInfo(SIProgramInfo &Out, const MachineFunction &MF);
   void getAmdKernelCode(amd_kernel_code_t &Out, const SIProgramInfo &KernelInfo,

lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp

getTargetStreamer().EmitDirectiveHSACodeObjectISA(
         ISA.Major, ISA.Minor, ISA.Stepping, "AMD", "AMDGPU");
   }
   if (TM.getTargetTriple().getOS() != Triple::AMDHSA)
     return;
 
   getTargetStreamer().EmitDirectiveHSACodeObjectVersion(2, 1);
   getTargetStreamer().EmitDirectiveHSACodeObjectISA(
       ISA.Major, ISA.Minor, ISA.Stepping, "AMD", "AMDGPU");
-  getTargetStreamer().EmitStartOfHSAMetadata(M);
+
+  HSAMetadataStream.begin(M);
 }
 
 void AMDGPUAsmPrinter::EmitEndOfAsmFile(Module &M) {
   if (TM.getTargetTriple().getOS() == Triple::AMDPAL) {
     // Copy the PAL metadata from the map where we collected it into a vector,
     // then write it as a .note.
     PALMD::Metadata PALMetadataVector;
     for (auto i : PALMetadataMap) {
       PALMetadataVector.push_back(i.first);
       PALMetadataVector.push_back(i.second);
     }
     getTargetStreamer().EmitPALMetadata(PALMetadataVector);
   }
 
   if (TM.getTargetTriple().getOS() != Triple::AMDHSA)
     return;
 
-  getTargetStreamer().EmitEndOfHSAMetadata();
+  HSAMetadataStream.end();
+  getTargetStreamer().EmitHSAMetadata(HSAMetadataStream.getHSAMetadata());
 }
 
 bool AMDGPUAsmPrinter::isBlockOnlyReachableByFallthrough(
   const MachineBasicBlock *MBB) const {
   if (!AsmPrinter::isBlockOnlyReachableByFallthrough(MBB))
     return false;
 
   if (MBB->empty())
if (STM.isAmdCodeObjectV2(*MF)) {
     getAmdKernelCode(KernelCode, CurrentProgramInfo, *MF);
 
     OutStreamer->SwitchSection(getObjFileLowering().getTextSection());
     getTargetStreamer().EmitAMDKernelCodeT(KernelCode);
   }
 
   if (TM.getTargetTriple().getOS() != Triple::AMDHSA)
     return;
-  getTargetStreamer().EmitKernelHSAMetadata(*MF->getFunction(), KernelCode);
+
+  HSAMetadataStream.emitKernel(*MF->getFunction(), KernelCode);
 }
 
 void AMDGPUAsmPrinter::EmitFunctionEntryLabel() {
   const SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
   const AMDGPUSubtarget &STM = MF->getSubtarget<AMDGPUSubtarget>();
   if (MFI->isEntryFunction() && STM.isAmdCodeObjectV2(*MF)) {
     SmallString<128> SymbolName;
     getNameWithPrefix(SymbolName, MF->getFunction()),

lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp

#include "AMDGPUGenAsmMatcher.inc"
 
   /// }
 
 private:
   bool ParseAsAbsoluteExpression(uint32_t &Ret);
   bool ParseDirectiveMajorMinor(uint32_t &Major, uint32_t &Minor);
   bool ParseDirectiveHSACodeObjectVersion();
   bool ParseDirectiveHSACodeObjectISA();
-  bool ParseDirectiveHSAMetadata();
   bool ParseAMDKernelCodeTValue(StringRef ID, amd_kernel_code_t &Header);
   bool ParseDirectiveAMDKernelCodeT();
   bool subtargetHasRegister(const MCRegisterInfo &MRI, unsigned RegNo) const;
   bool ParseDirectiveAMDGPUHsaKernel();
 
+  bool ParseDirectiveHSAMetadata();
   bool ParseDirectivePALMetadata();
 
   bool AddNextRegisterToList(unsigned& Reg, unsigned& RegWidth,
                              RegisterKind RegKind, unsigned Reg1,
                              unsigned RegNum);
   bool ParseAMDGPURegister(RegisterKind& RegKind, unsigned& Reg,
                            unsigned& RegNum, unsigned& RegWidth,
                            unsigned *DwordRegIndex);
bool AMDGPUAsmParser::ParseDirectiveHSACodeObjectISA() {
   ArchName = getLexer().getTok().getStringContents();
   Lex();
 
   getTargetStreamer().EmitDirectiveHSACodeObjectISA(Major, Minor, Stepping,
                                                     VendorName, ArchName);
   return false;
 }
 
-bool AMDGPUAsmParser::ParseDirectiveHSAMetadata() {
-  std::string YamlString;
-  raw_string_ostream YamlStream(YamlString);
-
-  getLexer().setSkipSpace(false);
-
-  bool FoundEnd = false;
-  while (!getLexer().is(AsmToken::Eof)) {
-    while (getLexer().is(AsmToken::Space)) {
-      YamlStream << getLexer().getTok().getString();
-      Lex();
-    }
-
-    if (getLexer().is(AsmToken::Identifier)) {
-      StringRef ID = getLexer().getTok().getIdentifier();
-      if (ID == AMDGPU::HSAMD::AssemblerDirectiveEnd) {
-        Lex();
-        FoundEnd = true;
-        break;
-      }
-    }
-
-    YamlStream << Parser.parseStringToEndOfStatement()
-               << getContext().getAsmInfo()->getSeparatorString();
-
-    Parser.eatToEndOfStatement();
-  }
-
-  getLexer().setSkipSpace(true);
-
-  if (getLexer().is(AsmToken::Eof) && !FoundEnd) {
-    return TokError(
-        "expected directive .end_amd_amdgpu_hsa_metadata not found");
-  }
-
-  YamlStream.flush();
-
-  if (!getTargetStreamer().EmitHSAMetadata(YamlString))
-    return Error(getParser().getTok().getLoc(), "invalid code object metadata");
-
-  return false;
-}
-
 bool AMDGPUAsmParser::ParseAMDKernelCodeTValue(StringRef ID,
                                                amd_kernel_code_t &Header) {
   SmallString<40> ErrStr;
   raw_svector_ostream Err(ErrStr);
   if (!parseAmdKernelCodeField(ID, getParser(), Header, Err)) {
     return TokError(Err.str());
   }
   Lex();
bool AMDGPUAsmParser::ParseDirectiveAMDGPUHsaKernel() {
 
   getTargetStreamer().EmitAMDGPUSymbolType(KernelName,
                                            ELF::STT_AMDGPU_HSA_KERNEL);
   Lex();
   KernelScope.initialize(getContext());
   return false;
 }
 
+bool AMDGPUAsmParser::ParseDirectiveHSAMetadata() {
+  std::string HSAMetadataString;
+  raw_string_ostream YamlStream(HSAMetadataString);
+
+  getLexer().setSkipSpace(false);
+
+  bool FoundEnd = false;
+  while (!getLexer().is(AsmToken::Eof)) {
+    while (getLexer().is(AsmToken::Space)) {
+      YamlStream << getLexer().getTok().getString();
+      Lex();
+    }
+
+    if (getLexer().is(AsmToken::Identifier)) {
+      StringRef ID = getLexer().getTok().getIdentifier();
+      if (ID == AMDGPU::HSAMD::AssemblerDirectiveEnd) {
+        Lex();
+        FoundEnd = true;
+        break;
+      }
+    }
+
+    YamlStream << Parser.parseStringToEndOfStatement()
+               << getContext().getAsmInfo()->getSeparatorString();
+
+    Parser.eatToEndOfStatement();
+  }
+
+  getLexer().setSkipSpace(true);
+
+  if (getLexer().is(AsmToken::Eof) && !FoundEnd) {
+    return TokError(Twine("expected directive ") +
+                    Twine(HSAMD::AssemblerDirectiveEnd) + Twine("not found"));
+  }
+
+  YamlStream.flush();
+
+  if (!getTargetStreamer().EmitHSAMetadata(HSAMetadataString))
+    return Error(getParser().getTok().getLoc(), "invalid HSA metadata");
+
+  return false;
+}
+
 bool AMDGPUAsmParser::ParseDirectivePALMetadata() {
   PALMD::Metadata PALMetadata;
   for (;;) {
     uint32_t Value;
     if (ParseAsAbsoluteExpression(Value)) {
       return TokError(Twine("invalid value in ") +
                       Twine(PALMD::AssemblerDirective));
     }
bool AMDGPUAsmParser::ParseDirective(AsmToken DirectiveID) {
   StringRef IDVal = DirectiveID.getString();
 
   if (IDVal == ".hsa_code_object_version")
     return ParseDirectiveHSACodeObjectVersion();
 
   if (IDVal == ".hsa_code_object_isa")
     return ParseDirectiveHSACodeObjectISA();
 
-  if (IDVal == AMDGPU::HSAMD::AssemblerDirectiveBegin)
-    return ParseDirectiveHSAMetadata();
-
   if (IDVal == ".amd_kernel_code_t")
     return ParseDirectiveAMDKernelCodeT();
 
   if (IDVal == ".amdgpu_hsa_kernel")
     return ParseDirectiveAMDGPUHsaKernel();
 
+  if (IDVal == AMDGPU::HSAMD::AssemblerDirectiveBegin)
+    return ParseDirectiveHSAMetadata();
+
   if (IDVal == PALMD::AssemblerDirective)
     return ParseDirectivePALMetadata();
 
   return true;
 }
 
 bool AMDGPUAsmParser::subtargetHasRegister(const MCRegisterInfo &MRI,
                                            unsigned RegNo) const {

lib/Target/AMDGPU/MCTargetDesc/AMDGPUHSAMetadataStreamer.h

 
 #ifndef LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUHSAMETADATASTREAMER_H
 #define LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUHSAMETADATASTREAMER_H
 
 #include "AMDGPU.h"
 #include "AMDKernelCodeT.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/AMDGPUMetadata.h"
-#include "llvm/Support/ErrorOr.h"
 
 namespace llvm {
 
 class Argument;
 class DataLayout;
 class Function;
 class MDNode;
 class Module;
 class Type;
 
 namespace AMDGPU {
 namespace HSAMD {
 
 class MetadataStreamer final {
 private:
   Metadata HSAMetadata;
   AMDGPUAS AMDGPUASI;
 
-  void dump(StringRef YamlString) const;
+  void dump(StringRef HSAMetadataString) const;
 
-  void verify(StringRef YamlString) const;
+  void verify(StringRef HSAMetadataString) const;
 
   AccessQualifier getAccessQualifier(StringRef AccQual) const;
 
   AddressSpaceQualifier getAddressSpaceQualifer(unsigned AddressSpace) const;
 
   ValueKind getValueKind(Type *Ty, StringRef TypeQual,
                          StringRef BaseTypeName) const;
 
private:
   void emitKernelCodeProps(const amd_kernel_code_t &KernelCode);
 
   void emitKernelDebugProps(const amd_kernel_code_t &KernelCode);
 
 public:
   MetadataStreamer() = default;
   ~MetadataStreamer() = default;
 
+  const Metadata &getHSAMetadata() const {
+    return HSAMetadata;
+  }
+
   void begin(const Module &Mod);
 
-  void end() {}
+  void end();
 
   void emitKernel(const Function &Func, const amd_kernel_code_t &KernelCode);
-
-  ErrorOr<std::string> toYamlString();
-
-  ErrorOr<std::string> toYamlString(StringRef YamlString);
 };
 
 } // end namespace HSAMD
 } // end namespace AMDGPU
 } // end namespace llvm
 
 #endif // LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUHSAMETADATASTREAMER_H

lib/Target/AMDGPU/MCTargetDesc/AMDGPUHSAMetadataStreamer.cpp

static cl::opt<bool> DumpHSAMetadata(
     cl::desc("Dump AMDGPU HSA Metadata"));
 static cl::opt<bool> VerifyHSAMetadata(
     "amdgpu-verify-hsa-metadata",
     cl::desc("Verify AMDGPU HSA Metadata"));
 
 namespace AMDGPU {
 namespace HSAMD {
 
-void MetadataStreamer::dump(StringRef YamlString) const {
-  errs() << "AMDGPU HSA Metadata:\n" << YamlString << '\n';
+void MetadataStreamer::dump(StringRef HSAMetadataString) const {
+  errs() << "AMDGPU HSA Metadata:\n" << HSAMetadataString << '\n';
 }
 
-void MetadataStreamer::verify(StringRef YamlString) const {
+void MetadataStreamer::verify(StringRef HSAMetadataString) const {
   errs() << "AMDGPU HSA Metadata Parser Test: ";
 
-  HSAMD::Metadata FromYamlString;
-  if (Metadata::fromYamlString(YamlString, FromYamlString)) {
+  HSAMD::Metadata FromHSAMetadataString;
+  if (fromString(HSAMetadataString, FromHSAMetadataString)) {
     errs() << "FAIL\n";
     return;
   }
 
-  std::string ToYamlString;
-  if (Metadata::toYamlString(FromYamlString, ToYamlString)) {
+  std::string ToHSAMetadataString;
+  if (toString(FromHSAMetadataString, ToHSAMetadataString)) {
     errs() << "FAIL\n";
     return;
   }
 
-  errs() << (YamlString == ToYamlString ? "PASS" : "FAIL") << '\n';
-  if (YamlString != ToYamlString) {
-    errs() << "Original input: " << YamlString << '\n'
-           << "Produced output: " << ToYamlString << '\n';
+  errs() << (HSAMetadataString == ToHSAMetadataString ? "PASS" : "FAIL")
+         << '\n';
+  if (HSAMetadataString != ToHSAMetadataString) {
+    errs() << "Original input: " << HSAMetadataString << '\n'
+           << "Produced output: " << ToHSAMetadataString << '\n';
   }
 }
 
 AccessQualifier MetadataStreamer::getAccessQualifier(StringRef AccQual) const {
   if (AccQual.empty())
     return AccessQualifier::Unknown;
 
   return StringSwitch<AccessQualifier>(AccQual)

 }
 
 void MetadataStreamer::begin(const Module &Mod) {
   AMDGPUASI = getAMDGPUAS(Mod);
   emitVersion();
   emitPrintf(Mod);
 }
 
+void MetadataStreamer::end() {
+  std::string HSAMetadataString;
+  if (auto Error = toString(HSAMetadata, HSAMetadataString))
+    return;
+
+  if (DumpHSAMetadata)
+    dump(HSAMetadataString);
+  if (VerifyHSAMetadata)
+    verify(HSAMetadataString);
+}
+
 void MetadataStreamer::emitKernel(const Function &Func,
                                   const amd_kernel_code_t &KernelCode) {
   if (Func.getCallingConv() != CallingConv::AMDGPU_KERNEL)
     return;
 
   HSAMetadata.mKernels.push_back(Kernel::Metadata());
   auto &Kernel = HSAMetadata.mKernels.back();
 
   Kernel.mName = Func.getName();
   emitKernelLanguage(Func);
   emitKernelAttrs(Func);
   emitKernelArgs(Func);
   emitKernelCodeProps(KernelCode);
   emitKernelDebugProps(KernelCode);
 }
 
-ErrorOr<std::string> MetadataStreamer::toYamlString() {
-  std::string ToYamlString;
-  if (auto Error = Metadata::toYamlString(HSAMetadata, ToYamlString))
-    return Error;
-
-  if (DumpHSAMetadata)
-    dump(ToYamlString);
-  if (VerifyHSAMetadata)
-    verify(ToYamlString);
-
-  return ToYamlString;
-}
-
-ErrorOr<std::string> MetadataStreamer::toYamlString(StringRef YamlString) {
-  if (auto Error = Metadata::fromYamlString(YamlString, HSAMetadata))
-    return Error;
-
-  return toYamlString();
-}
-
 } // end namespace HSAMD
 } // end namespace AMDGPU
 } // end namespace llvm

lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.h

 //===-- AMDGPUTargetStreamer.h - AMDGPU Target Streamer --------*- C++ -*--===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUTARGETSTREAMER_H
 #define LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUTARGETSTREAMER_H
 
-#include "AMDGPUHSAMetadataStreamer.h"
 #include "AMDKernelCodeT.h"
 #include "llvm/MC/MCStreamer.h"
+#include "llvm/Support/AMDGPUMetadata.h"
 
 namespace llvm {
 #include "AMDGPUPTNote.h"
 
 class DataLayout;
 class Function;
 class MCELFStreamer;
 class MCSymbol;
 class MDNode;
 class Module;
 class Type;
 
 class AMDGPUTargetStreamer : public MCTargetStreamer {
 protected:
-  AMDGPU::HSAMD::MetadataStreamer HSAMetadataStreamer;
   MCContext &getContext() const { return Streamer.getContext(); }
 
 public:
   AMDGPUTargetStreamer(MCStreamer &S);
   virtual void EmitDirectiveHSACodeObjectVersion(uint32_t Major,
                                                  uint32_t Minor) = 0;
 
   virtual void EmitDirectiveHSACodeObjectISA(uint32_t Major, uint32_t Minor,
                                              uint32_t Stepping,
                                              StringRef VendorName,
                                              StringRef ArchName) = 0;
 
   virtual void EmitAMDKernelCodeT(const amd_kernel_code_t &Header) = 0;
 
   virtual void EmitAMDGPUSymbolType(StringRef SymbolName, unsigned Type) = 0;
 
-  virtual void EmitStartOfHSAMetadata(const Module &Mod);
-
-  virtual void EmitKernelHSAMetadata(
-      const Function &Func, const amd_kernel_code_t &KernelCode);
-
-  virtual void EmitEndOfHSAMetadata();
+  /// \returns True on success, false on failure.
+  virtual bool EmitHSAMetadata(StringRef HSAMetadataString);
 
   /// \returns True on success, false on failure.
-  virtual bool EmitHSAMetadata(StringRef YamlString) = 0;
+  virtual bool EmitHSAMetadata(const AMDGPU::HSAMD::Metadata &HSAMetadata) = 0;
 
   /// \returns True on success, false on failure.
   virtual bool EmitPALMetadata(const AMDGPU::PALMD::Metadata &PALMetadata) = 0;
 };
 
 class AMDGPUTargetAsmStreamer final : public AMDGPUTargetStreamer {
   formatted_raw_ostream &OS;
 public:
   AMDGPUTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
   void EmitDirectiveHSACodeObjectVersion(uint32_t Major,
                                          uint32_t Minor) override;
 
   void EmitDirectiveHSACodeObjectISA(uint32_t Major, uint32_t Minor,
                                      uint32_t Stepping, StringRef VendorName,
                                      StringRef ArchName) override;
 
   void EmitAMDKernelCodeT(const amd_kernel_code_t &Header) override;
 
   void EmitAMDGPUSymbolType(StringRef SymbolName, unsigned Type) override;
 
   /// \returns True on success, false on failure.
-  bool EmitHSAMetadata(StringRef YamlString) override;
+  bool EmitHSAMetadata(const AMDGPU::HSAMD::Metadata &HSAMetadata) override;
 
   /// \returns True on success, false on failure.
   bool EmitPALMetadata(const AMDGPU::PALMD::Metadata &PALMetadata) override;
 };
 
 class AMDGPUTargetELFStreamer final : public AMDGPUTargetStreamer {
   MCStreamer &Streamer;
 
void EmitDirectiveHSACodeObjectISA(uint32_t Major, uint32_t Minor,
                                      uint32_t Stepping, StringRef VendorName,
                                      StringRef ArchName) override;
 
   void EmitAMDKernelCodeT(const amd_kernel_code_t &Header) override;
 
   void EmitAMDGPUSymbolType(StringRef SymbolName, unsigned Type) override;
 
   /// \returns True on success, false on failure.
-  bool EmitHSAMetadata(StringRef YamlString) override;
+  bool EmitHSAMetadata(const AMDGPU::HSAMD::Metadata &HSAMetadata) override;
 
   /// \returns True on success, false on failure.
   bool EmitPALMetadata(const AMDGPU::PALMD::Metadata &PALMetadata) override;
 };
 
 }
 #endif

lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp

 
 //===----------------------------------------------------------------------===//
 // AMDGPUTargetStreamer
 //===----------------------------------------------------------------------===//
 
 AMDGPUTargetStreamer::AMDGPUTargetStreamer(MCStreamer &S)
     : MCTargetStreamer(S) {}
 
-void AMDGPUTargetStreamer::EmitStartOfHSAMetadata(const Module &Mod) {
-  HSAMetadataStreamer.begin(Mod);
-}
-
-void AMDGPUTargetStreamer::EmitKernelHSAMetadata(
-    const Function &Func, const amd_kernel_code_t &KernelCode) {
-  HSAMetadataStreamer.emitKernel(Func, KernelCode);
-}
+bool AMDGPUTargetStreamer::EmitHSAMetadata(StringRef HSAMetadataString) {
+  HSAMD::Metadata HSAMetadata;
+  if (auto Error = HSAMD::fromString(HSAMetadataString, HSAMetadata))
+    return false;
 
-void AMDGPUTargetStreamer::EmitEndOfHSAMetadata() {
-  HSAMetadataStreamer.end();
-  EmitHSAMetadata(HSAMetadataStreamer.toYamlString().get());
+  return EmitHSAMetadata(HSAMetadata);
 }
 
 //===----------------------------------------------------------------------===//
 // AMDGPUTargetAsmStreamer
 //===----------------------------------------------------------------------===//
 
 AMDGPUTargetAsmStreamer::AMDGPUTargetAsmStreamer(MCStreamer &S,
                                                  formatted_raw_ostream &OS)
void AMDGPUTargetAsmStreamer::EmitAMDGPUSymbolType(StringRef SymbolName,
   switch (Type) {
     default: llvm_unreachable("Invalid AMDGPU symbol type");
     case ELF::STT_AMDGPU_HSA_KERNEL:
       OS << "\t.amdgpu_hsa_kernel " << SymbolName << '\n' ;
       break;
   }
 }
 
-bool AMDGPUTargetAsmStreamer::EmitHSAMetadata(StringRef YamlString) {
-  auto VerifiedYamlString = HSAMetadataStreamer.toYamlString(YamlString);
-  if (!VerifiedYamlString)
+bool AMDGPUTargetAsmStreamer::EmitHSAMetadata(
+    const AMDGPU::HSAMD::Metadata &HSAMetadata) {
+  std::string HSAMetadataString;
+  if (auto Error = HSAMD::toString(HSAMetadata, HSAMetadataString))
     return false;
 
-  OS << '\t' << AMDGPU::HSAMD::AssemblerDirectiveBegin << '\n';
-  OS << VerifiedYamlString.get();
-  OS << '\t' << AMDGPU::HSAMD::AssemblerDirectiveEnd << '\n';
-
+  OS << '\t' << HSAMD::AssemblerDirectiveBegin << '\n';
+  OS << HSAMetadataString << '\n';
+  OS << '\t' << HSAMD::AssemblerDirectiveEnd << '\n';
   return true;
 }
 
 bool AMDGPUTargetAsmStreamer::EmitPALMetadata(
     const PALMD::Metadata &PALMetadata) {
   std::string PALMetadataString;
-  auto Error = PALMD::toString(PALMetadata, PALMetadataString);
-  if (Error)
+  if (auto Error = PALMD::toString(PALMetadata, PALMetadataString))
     return false;
 
   OS << '\t' << PALMD::AssemblerDirective << PALMetadataString << '\n';
   return true;
 }
 
 //===----------------------------------------------------------------------===//
 // AMDGPUTargetELFStreamer

 
 void AMDGPUTargetELFStreamer::EmitAMDGPUSymbolType(StringRef SymbolName,
                                                    unsigned Type) {
   MCSymbolELF *Symbol = cast<MCSymbolELF>(
       getStreamer().getContext().getOrCreateSymbol(SymbolName));
   Symbol->setType(ELF::STT_AMDGPU_HSA_KERNEL);
 }
 
-bool AMDGPUTargetELFStreamer::EmitHSAMetadata(StringRef YamlString) {
-  auto VerifiedYamlString = HSAMetadataStreamer.toYamlString(YamlString);
-  if (!VerifiedYamlString)
+bool AMDGPUTargetELFStreamer::EmitHSAMetadata(
+    const AMDGPU::HSAMD::Metadata &HSAMetadata) {
+  std::string HSAMetadataString;
+  if (auto Error = HSAMD::toString(HSAMetadata, HSAMetadataString))
     return false;
 
   // Create two labels to mark the beginning and end of the desc field
   // and a MCExpr to calculate the size of the desc field.
   auto &Context = getContext();
   auto *DescBegin = Context.createTempSymbol();
   auto *DescEnd = Context.createTempSymbol();
   auto *DescSZ = MCBinaryExpr::createSub(
     MCSymbolRefExpr::create(DescEnd, Context),
     MCSymbolRefExpr::create(DescBegin, Context), Context);
 
   EmitAMDGPUNote(
     DescSZ,
     ElfNote::NT_AMDGPU_HSA_CODE_OBJECT_METADATA,
     [&](MCELFStreamer &OS) {
       OS.EmitLabel(DescBegin);
-      OS.EmitBytes(VerifiedYamlString.get());
+      OS.EmitBytes(HSAMetadataString);
       OS.EmitLabel(DescEnd);
     }
   );
-
   return true;
 }
 
 bool AMDGPUTargetELFStreamer::EmitPALMetadata(
     const PALMD::Metadata &PALMetadata) {
   EmitAMDGPUNote(
     MCConstantExpr::create(PALMetadata.size() * sizeof(uint32_t), getContext()),
     ElfNote::NT_AMDGPU_PAL_METADATA,
     [&](MCELFStreamer &OS){
       for (auto I : PALMetadata)
         OS.EmitIntValue(I, sizeof(uint32_t));
     }
   );
   return true;
 }