lib/Target/AMDGPU/AMDGPUAsmPrinter.h

   1 //===-- AMDGPUAsmPrinter.h - Print AMDGPU assembly code ---------*- C++ -*-===//
   2 //
   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
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 /// \file
  10 /// AMDGPU Assembly printer class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H
  15 #define LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H
  16
  17 #include "AMDGPU.h"
  18 #include "AMDKernelCodeT.h"
  19 #include "AMDGPUHSAMetadataStreamer.h"
  20 #include "SIProgramInfo.h"
  21 #include "llvm/ADT/StringRef.h"
  22 #include "llvm/CodeGen/AsmPrinter.h"
  23 #include "llvm/Support/AMDHSAKernelDescriptor.h"
  24 #include <cstddef>
  25 #include <cstdint>
  26 #include <limits>
  27 #include <memory>
  28 #include <string>
  29 #include <vector>
  30
  31 namespace llvm {
  32
  33 class AMDGPUMachineFunction;
  34 class AMDGPUTargetStreamer;
  35 class MCCodeEmitter;
  36 class MCOperand;
  37 class GCNSubtarget;
  38
  39 class AMDGPUAsmPrinter final : public AsmPrinter {
  40 private:
  41   // Track resource usage for callee functions.
  42   struct SIFunctionResourceInfo {
  43     // Track the number of explicitly used VGPRs. Special registers reserved at
  44     // the end are tracked separately.
  45     int32_t NumVGPR = 0;
  46     int32_t NumExplicitSGPR = 0;
  47     uint64_t PrivateSegmentSize = 0;
  48     bool UsesVCC = false;
  49     bool UsesFlatScratch = false;
  50     bool HasDynamicallySizedStack = false;
  51     bool HasRecursion = false;
  52
  53     int32_t getTotalNumSGPRs(const GCNSubtarget &ST) const;
  54   };
  55
  56   SIProgramInfo CurrentProgramInfo;
  57   DenseMap<const Function *, SIFunctionResourceInfo> CallGraphResourceInfo;
  58
  59   std::unique_ptr<AMDGPU::HSAMD::MetadataStreamer> HSAMetadataStream;
  60
  61   MCCodeEmitter *DumpCodeInstEmitter = nullptr;
  62
  63   uint64_t getFunctionCodeSize(const MachineFunction &MF) const;
  64   SIFunctionResourceInfo analyzeResourceUsage(const MachineFunction &MF) const;
  65
  66   void getSIProgramInfo(SIProgramInfo &Out, const MachineFunction &MF);
  67   void getAmdKernelCode(amd_kernel_code_t &Out, const SIProgramInfo &KernelInfo,
  68                         const MachineFunction &MF) const;
  69   void findNumUsedRegistersSI(const MachineFunction &MF,
  70                               unsigned &NumSGPR,
  71                               unsigned &NumVGPR) const;
  72
  73   /// Emit register usage information so that the GPU driver
  74   /// can correctly setup the GPU state.
  75   void EmitProgramInfoSI(const MachineFunction &MF,
  76                          const SIProgramInfo &KernelInfo);
  77   void EmitPALMetadata(const MachineFunction &MF,
  78                        const SIProgramInfo &KernelInfo);
  79   void emitCommonFunctionComments(uint32_t NumVGPR,
  80                                   uint32_t NumSGPR,
  81                                   uint64_t ScratchSize,
  82                                   uint64_t CodeSize,
  83                                   const AMDGPUMachineFunction* MFI);
  84
  85   uint16_t getAmdhsaKernelCodeProperties(
  86       const MachineFunction &MF) const;
  87
  88   amdhsa::kernel_descriptor_t getAmdhsaKernelDescriptor(
  89       const MachineFunction &MF,
  90       const SIProgramInfo &PI) const;
  91
  92 public:
  93   explicit AMDGPUAsmPrinter(TargetMachine &TM,
  94                             std::unique_ptr<MCStreamer> Streamer);
  95
  96   StringRef getPassName() const override;
  97
  98   const MCSubtargetInfo* getGlobalSTI() const;
  99
 100   AMDGPUTargetStreamer* getTargetStreamer() const;
 101
 102   bool doFinalization(Module &M) override;
 103   bool runOnMachineFunction(MachineFunction &MF) override;
 104
 105   /// Wrapper for MCInstLowering.lowerOperand() for the tblgen'erated
 106   /// pseudo lowering.
 107   bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp) const;
 108
 109   /// Lower the specified LLVM Constant to an MCExpr.
 110   /// The AsmPrinter::lowerConstantof does not know how to lower
 111   /// addrspacecast, therefore they should be lowered by this function.
 112   const MCExpr *lowerConstant(const Constant *CV) override;
 113
 114   /// tblgen'erated driver function for lowering simple MI->MC pseudo
 115   /// instructions.
 116   bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
 117                                    const MachineInstr *MI);
 118
 119   /// Implemented in AMDGPUMCInstLower.cpp
 120   void EmitInstruction(const MachineInstr *MI) override;
 121
 122   void EmitFunctionBodyStart() override;
 123
 124   void EmitFunctionBodyEnd() override;
 125
 126   void EmitFunctionEntryLabel() override;
 127
 128   void EmitBasicBlockStart(const MachineBasicBlock &MBB) override;
 129
 130   void EmitGlobalVariable(const GlobalVariable *GV) override;
 131
 132   void EmitStartOfAsmFile(Module &M) override;
 133
 134   void EmitEndOfAsmFile(Module &M) override;
 135
 136   bool isBlockOnlyReachableByFallthrough(
 137     const MachineBasicBlock *MBB) const override;
 138
 139   bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
 140                        const char *ExtraCode, raw_ostream &O) override;
 141
 142 protected:
 143   std::vector<std::string> DisasmLines, HexLines;
 144   size_t DisasmLineMaxLen;
 145 };
 146
 147 } // end namespace llvm
 148
 149 #endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H