AMDGPUTargetStreamer.h

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//===-- AMDGPUTargetStreamer.h - AMDGPU Target Streamer --------*- 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
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUTARGETSTREAMER_H
#define LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUTARGETSTREAMER_H
 
#include "Utils/AMDGPUBaseInfo.h"
#include "Utils/AMDGPUPALMetadata.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/MC/MCStreamer.h"
#include <string>
#include <utility>
 
namespace llvm {
 
class MCELFStreamer;
class MCSymbol;
class formatted_raw_ostream;
 
namespace AMDGPU {
 
struct AMDGPUMCKernelCodeT;
struct MCKernelDescriptor;
namespace HSAMD {
struct Metadata;
}
 
struct FuncInfo {
  uint32_t NumSGPR = 0;
  uint32_t NumArchVGPR = 0;
  uint32_t NumAccVGPR = 0;
  uint32_t PrivateSegmentSize = 0;
  bool UsesVCC = false;
  bool UsesFlatScratch = false;
  bool HasDynStack = false;
 
  MCSymbol *Sym = nullptr;
};
 
struct InfoSectionData {
  SmallVector<FuncInfo, 8> Funcs;
  SmallVector<std::pair<MCSymbol *, MCSymbol *>, 4> Uses;
  SmallVector<std::pair<MCSymbol *, MCSymbol *>, 8> Calls;
  SmallVector<std::pair<MCSymbol *, std::string>, 4> IndirectCalls;
  SmallVector<std::pair<MCSymbol *, std::string>, 4> TypeIds;
};
 
} // namespace AMDGPU
 
class AMDGPUTargetStreamer : public MCTargetStreamer {
  AMDGPUPALMetadata PALMetadata;
  bool AMDGCNTargetEmitted = false;
 
protected:
  // TODO: Move HSAMetadataStream to AMDGPUTargetStreamer.
  std::optional<AMDGPU::TargetID> TargetID;
  unsigned CodeObjectVersion;
 
  MCContext &getContext() const { return Streamer.getContext(); }
 
public:
  AMDGPUTargetStreamer(MCStreamer &S)
      : MCTargetStreamer(S),
        // Assume the default COV for now, EmitDirectiveAMDHSACodeObjectVersion
        // will update this if it is encountered.
        CodeObjectVersion(AMDGPU::getDefaultAMDHSACodeObjectVersion()) {}
 
  AMDGPUPALMetadata *getPALMetadata() { return &PALMetadata; }
 
  virtual void EmitDirectiveAMDGCNTarget(){};
 
  /// Emit the .amdgcn_target directive unless it has already been emitted to
  /// this streamer. The code generator and the parsers for any inline assembly
  /// in the module share one streamer, and the directive must appear only once
  /// per output file.
  void emitDirectiveAMDGCNTargetOnce() {
    if (AMDGCNTargetEmitted)
      return;
    AMDGCNTargetEmitted = true;
    EmitDirectiveAMDGCNTarget();
  }
 
  virtual void EmitDirectiveAMDHSACodeObjectVersion(unsigned COV) {
    CodeObjectVersion = COV;
  }
 
  virtual void EmitAMDKernelCodeT(AMDGPU::AMDGPUMCKernelCodeT &Header) {};
 
  virtual void EmitAMDGPUSymbolType(StringRef SymbolName, unsigned Type){};
 
  virtual void emitAMDGPULDS(MCSymbol *Symbol, unsigned Size, Align Alignment) {
  }
 
  virtual void EmitMCResourceInfo(
      const MCSymbol *NumVGPR, const MCSymbol *NumAGPR,
      const MCSymbol *NumExplicitSGPR, const MCSymbol *NumNamedBarrier,
      const MCSymbol *PrivateSegmentSize, const MCSymbol *UsesVCC,
      const MCSymbol *UsesFlatScratch, const MCSymbol *HasDynamicallySizedStack,
      const MCSymbol *HasRecursion, const MCSymbol *HasIndirectCall) {};
 
  virtual void EmitMCResourceMaximums(const MCSymbol *MaxVGPR,
                                      const MCSymbol *MaxAGPR,
                                      const MCSymbol *MaxSGPR,
                                      const MCSymbol *MaxNamedBarrier) {};
 
  /// \returns True on success, false on failure.
  virtual bool EmitISAVersion() { return true; }
 
  /// \returns True on success, false on failure.
  virtual bool EmitHSAMetadataV3(StringRef HSAMetadataString);
 
  /// Emit HSA Metadata
  ///
  /// When \p Strict is true, known metadata elements must already be
  /// well-typed. When \p Strict is false, known types are inferred and
  /// the \p HSAMetadata structure is updated with the correct types.
  ///
  /// \returns True on success, false on failure.
  virtual bool EmitHSAMetadata(msgpack::Document &HSAMetadata, bool Strict) {
    return true;
  }
 
  /// \returns True on success, false on failure.
  virtual bool EmitHSAMetadata(const AMDGPU::HSAMD::Metadata &HSAMetadata) {
    return true;
  }
 
  /// \returns True on success, false on failure.
  virtual bool EmitCodeEnd(const MCSubtargetInfo &STI) { return true; }
 
  virtual void
  EmitAmdhsaKernelDescriptor(const MCSubtargetInfo &STI, StringRef KernelName,
                             const AMDGPU::MCKernelDescriptor &KernelDescriptor,
                             const MCExpr *NextVGPR, const MCExpr *NextSGPR,
                             const MCExpr *ReserveVCC,
                             const MCExpr *ReserveFlatScr) {}
 
  virtual void emitAMDGPUInfo(const AMDGPU::InfoSectionData &Data) {}
 
  static unsigned getElfMach(StringRef GPU);
 
  const std::optional<AMDGPU::TargetID> &getTargetID() const {
    return TargetID;
  }
  std::optional<AMDGPU::TargetID> &getTargetID() { return TargetID; }
  void initializeTargetID(const MCSubtargetInfo &STI,
                          bool ApplyFeatureString = false);
};
 
class AMDGPUTargetAsmStreamer final : public AMDGPUTargetStreamer {
  formatted_raw_ostream &OS;
public:
  AMDGPUTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
 
  void finish() override;
 
  void EmitDirectiveAMDGCNTarget() override;
 
  void EmitDirectiveAMDHSACodeObjectVersion(unsigned COV) override;
 
  void EmitAMDKernelCodeT(AMDGPU::AMDGPUMCKernelCodeT &Header) override;
 
  void EmitAMDGPUSymbolType(StringRef SymbolName, unsigned Type) override;
 
  void emitAMDGPULDS(MCSymbol *Sym, unsigned Size, Align Alignment) override;
 
  void EmitMCResourceInfo(
      const MCSymbol *NumVGPR, const MCSymbol *NumAGPR,
      const MCSymbol *NumExplicitSGPR, const MCSymbol *NumNamedBarrier,
      const MCSymbol *PrivateSegmentSize, const MCSymbol *UsesVCC,
      const MCSymbol *UsesFlatScratch, const MCSymbol *HasDynamicallySizedStack,
      const MCSymbol *HasRecursion, const MCSymbol *HasIndirectCall) override;
 
  void EmitMCResourceMaximums(const MCSymbol *MaxVGPR, const MCSymbol *MaxAGPR,
                              const MCSymbol *MaxSGPR,
                              const MCSymbol *MaxNamedBarrier) override;
 
  /// \returns True on success, false on failure.
  bool EmitISAVersion() override;
 
  /// \returns True on success, false on failure.
  bool EmitHSAMetadata(msgpack::Document &HSAMetadata, bool Strict) override;
 
  /// \returns True on success, false on failure.
  bool EmitCodeEnd(const MCSubtargetInfo &STI) override;
 
  void
  EmitAmdhsaKernelDescriptor(const MCSubtargetInfo &STI, StringRef KernelName,
                             const AMDGPU::MCKernelDescriptor &KernelDescriptor,
                             const MCExpr *NextVGPR, const MCExpr *NextSGPR,
                             const MCExpr *ReserveVCC,
                             const MCExpr *ReserveFlatScr) override;
 
  void emitAMDGPUInfo(const AMDGPU::InfoSectionData &Data) override;
};
 
class AMDGPUTargetELFStreamer final : public AMDGPUTargetStreamer {
  const MCSubtargetInfo &STI;
  MCStreamer &Streamer;
 
  void EmitNote(StringRef Name, const MCExpr *DescSize, unsigned NoteType,
                function_ref<void(MCELFStreamer &)> EmitDesc);
 
  unsigned getEFlags();
 
  unsigned getEFlagsR600();
  unsigned getEFlagsAMDGCN();
 
  unsigned getEFlagsUnknownOS();
  unsigned getEFlagsAMDHSA();
  unsigned getEFlagsAMDPAL();
  unsigned getEFlagsMesa3D();
 
  unsigned getEFlagsV3();
  unsigned getEFlagsV4();
  unsigned getEFlagsV6();
 
public:
  AMDGPUTargetELFStreamer(MCStreamer &S, const MCSubtargetInfo &STI);
 
  MCELFStreamer &getStreamer();
 
  void finish() override;
 
  void EmitDirectiveAMDGCNTarget() override;
 
  void EmitAMDKernelCodeT(AMDGPU::AMDGPUMCKernelCodeT &Header) override;
 
  void EmitAMDGPUSymbolType(StringRef SymbolName, unsigned Type) override;
 
  void emitAMDGPULDS(MCSymbol *Sym, unsigned Size, Align Alignment) override;
 
  /// \returns True on success, false on failure.
  bool EmitISAVersion() override;
 
  /// \returns True on success, false on failure.
  bool EmitHSAMetadata(msgpack::Document &HSAMetadata, bool Strict) override;
 
  /// \returns True on success, false on failure.
  bool EmitCodeEnd(const MCSubtargetInfo &STI) override;
 
  void
  EmitAmdhsaKernelDescriptor(const MCSubtargetInfo &STI, StringRef KernelName,
                             const AMDGPU::MCKernelDescriptor &KernelDescriptor,
                             const MCExpr *NextVGPR, const MCExpr *NextSGPR,
                             const MCExpr *ReserveVCC,
                             const MCExpr *ReserveFlatScr) override;
 
  void emitAMDGPUInfo(const AMDGPU::InfoSectionData &Data) override;
};
}
#endif