AMDGPUAsmPrinter.h

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//===-- AMDGPUAsmPrinter.h - Print AMDGPU assembly code ---------*- 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
//
//===----------------------------------------------------------------------===//
//
/// \file
/// AMDGPU Assembly printer class.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H
#define LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H
 
#include "SIProgramInfo.h"
#include "llvm/CodeGen/AsmPrinter.h"
 
struct amd_kernel_code_t;
 
namespace llvm {
 
class AMDGPUMachineFunction;
struct AMDGPUResourceUsageAnalysis;
class AMDGPUTargetStreamer;
class MCCodeEmitter;
class MCOperand;
 
namespace AMDGPU {
namespace HSAMD {
class MetadataStreamer;
}
} // namespace AMDGPU
 
namespace amdhsa {
struct kernel_descriptor_t;
}
 
class AMDGPUAsmPrinter final : public AsmPrinter {
private:
  void initializeTargetID(const Module &M);
 
  AMDGPUResourceUsageAnalysis *ResourceUsage;
 
  SIProgramInfo CurrentProgramInfo;
 
  std::unique_ptr<AMDGPU::HSAMD::MetadataStreamer> HSAMetadataStream;
 
  MCCodeEmitter *DumpCodeInstEmitter = nullptr;
 
  uint64_t getFunctionCodeSize(const MachineFunction &MF) const;
 
  void getSIProgramInfo(SIProgramInfo &Out, const MachineFunction &MF);
  void getAmdKernelCode(amd_kernel_code_t &Out, const SIProgramInfo &KernelInfo,
                        const MachineFunction &MF) const;
  void findNumUsedRegistersSI(const MachineFunction &MF,
                              unsigned &NumSGPR,
                              unsigned &NumVGPR) const;
 
  /// Emit register usage information so that the GPU driver
  /// can correctly setup the GPU state.
  void EmitProgramInfoSI(const MachineFunction &MF,
                         const SIProgramInfo &KernelInfo);
  void EmitPALMetadata(const MachineFunction &MF,
                       const SIProgramInfo &KernelInfo);
  void emitPALFunctionMetadata(const MachineFunction &MF);
  void emitCommonFunctionComments(uint32_t NumVGPR,
                                  Optional<uint32_t> NumAGPR,
                                  uint32_t TotalNumVGPR,
                                  uint32_t NumSGPR,
                                  uint64_t ScratchSize,
                                  uint64_t CodeSize,
                                  const AMDGPUMachineFunction* MFI);
 
  uint16_t getAmdhsaKernelCodeProperties(
      const MachineFunction &MF) const;
 
  amdhsa::kernel_descriptor_t getAmdhsaKernelDescriptor(
      const MachineFunction &MF,
      const SIProgramInfo &PI) const;
 
public:
  explicit AMDGPUAsmPrinter(TargetMachine &TM,
                            std::unique_ptr<MCStreamer> Streamer);
 
  StringRef getPassName() const override;
 
  const MCSubtargetInfo* getGlobalSTI() const;
 
  AMDGPUTargetStreamer* getTargetStreamer() const;
 
  bool doFinalization(Module &M) override;
  bool runOnMachineFunction(MachineFunction &MF) override;
 
  /// Wrapper for MCInstLowering.lowerOperand() for the tblgen'erated
  /// pseudo lowering.
  bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp) const;
 
  /// Lower the specified LLVM Constant to an MCExpr.
  /// The AsmPrinter::lowerConstantof does not know how to lower
  /// addrspacecast, therefore they should be lowered by this function.
  const MCExpr *lowerConstant(const Constant *CV) override;
 
  /// tblgen'erated driver function for lowering simple MI->MC pseudo
  /// instructions.
  bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
                                   const MachineInstr *MI);
 
  /// Implemented in AMDGPUMCInstLower.cpp
  void emitInstruction(const MachineInstr *MI) override;
 
  void emitFunctionBodyStart() override;
 
  void emitFunctionBodyEnd() override;
 
  void emitFunctionEntryLabel() override;
 
  void emitBasicBlockStart(const MachineBasicBlock &MBB) override;
 
  void emitGlobalVariable(const GlobalVariable *GV) override;
 
  void emitStartOfAsmFile(Module &M) override;
 
  void emitEndOfAsmFile(Module &M) override;
 
  bool isBlockOnlyReachableByFallthrough(
    const MachineBasicBlock *MBB) const override;
 
  bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
                       const char *ExtraCode, raw_ostream &O) override;
 
protected:
  void getAnalysisUsage(AnalysisUsage &AU) const override;
 
  std::vector<std::string> DisasmLines, HexLines;
  size_t DisasmLineMaxLen;
};
 
} // end namespace llvm
 
#endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H