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 "SIProgramInfo.h" 18 #include "llvm/CodeGen/AsmPrinter.h" 19 20 struct amd_kernel_code_t; 21 22 namespace llvm { 23 24 class AMDGPUMachineFunction; 25 class AMDGPUTargetStreamer; 26 class MCCodeEmitter; 27 class MCOperand; 28 class GCNSubtarget; 29 30 namespace AMDGPU { 31 namespace HSAMD { 32 class MetadataStreamer; 33 } 34 } // namespace AMDGPU 35 36 namespace amdhsa { 37 struct kernel_descriptor_t; 38 } 39 40 class AMDGPUAsmPrinter final : public AsmPrinter { 41 private: 42 // Track resource usage for callee functions. 43 struct SIFunctionResourceInfo { 44 // Track the number of explicitly used VGPRs. Special registers reserved at 45 // the end are tracked separately. 46 int32_t NumVGPR = 0; 47 int32_t NumAGPR = 0; 48 int32_t NumExplicitSGPR = 0; 49 uint64_t PrivateSegmentSize = 0; 50 bool UsesVCC = false; 51 bool UsesFlatScratch = false; 52 bool HasDynamicallySizedStack = false; 53 bool HasRecursion = false; 54 55 int32_t getTotalNumSGPRs(const GCNSubtarget &ST) const; 56 int32_t getTotalNumVGPRs(const GCNSubtarget &ST) const; 57 }; 58 59 SIProgramInfo CurrentProgramInfo; 60 DenseMap<const Function *, SIFunctionResourceInfo> CallGraphResourceInfo; 61 62 std::unique_ptr<AMDGPU::HSAMD::MetadataStreamer> HSAMetadataStream; 63 64 MCCodeEmitter *DumpCodeInstEmitter = nullptr; 65 66 uint64_t getFunctionCodeSize(const MachineFunction &MF) const; 67 SIFunctionResourceInfo analyzeResourceUsage(const MachineFunction &MF) const; 68 69 void getSIProgramInfo(SIProgramInfo &Out, const MachineFunction &MF); 70 void getAmdKernelCode(amd_kernel_code_t &Out, const SIProgramInfo &KernelInfo, 71 const MachineFunction &MF) const; 72 void findNumUsedRegistersSI(const MachineFunction &MF, 73 unsigned &NumSGPR, 74 unsigned &NumVGPR) const; 75 76 /// Emit register usage information so that the GPU driver 77 /// can correctly setup the GPU state. 78 void EmitProgramInfoSI(const MachineFunction &MF, 79 const SIProgramInfo &KernelInfo); 80 void EmitPALMetadata(const MachineFunction &MF, 81 const SIProgramInfo &KernelInfo); 82 void emitPALFunctionMetadata(const MachineFunction &MF); 83 void emitCommonFunctionComments(uint32_t NumVGPR, 84 Optional<uint32_t> NumAGPR, 85 uint32_t TotalNumVGPR, 86 uint32_t NumSGPR, 87 uint64_t ScratchSize, 88 uint64_t CodeSize, 89 const AMDGPUMachineFunction* MFI); 90 91 uint16_t getAmdhsaKernelCodeProperties( 92 const MachineFunction &MF) const; 93 94 amdhsa::kernel_descriptor_t getAmdhsaKernelDescriptor( 95 const MachineFunction &MF, 96 const SIProgramInfo &PI) const; 97 98 public: 99 explicit AMDGPUAsmPrinter(TargetMachine &TM, 100 std::unique_ptr<MCStreamer> Streamer); 101 102 StringRef getPassName() const override; 103 104 const MCSubtargetInfo* getGlobalSTI() const; 105 106 AMDGPUTargetStreamer* getTargetStreamer() const; 107 108 bool doFinalization(Module &M) override; 109 bool runOnMachineFunction(MachineFunction &MF) override; 110 111 /// Wrapper for MCInstLowering.lowerOperand() for the tblgen'erated 112 /// pseudo lowering. 113 bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp) const; 114 115 /// Lower the specified LLVM Constant to an MCExpr. 116 /// The AsmPrinter::lowerConstantof does not know how to lower 117 /// addrspacecast, therefore they should be lowered by this function. 118 const MCExpr *lowerConstant(const Constant *CV) override; 119 120 /// tblgen'erated driver function for lowering simple MI->MC pseudo 121 /// instructions. 122 bool emitPseudoExpansionLowering(MCStreamer &OutStreamer, 123 const MachineInstr *MI); 124 125 /// Implemented in AMDGPUMCInstLower.cpp 126 void emitInstruction(const MachineInstr *MI) override; 127 128 void emitFunctionBodyStart() override; 129 130 void emitFunctionBodyEnd() override; 131 132 void emitFunctionEntryLabel() override; 133 134 void emitBasicBlockStart(const MachineBasicBlock &MBB) override; 135 136 void emitGlobalVariable(const GlobalVariable *GV) override; 137 138 void emitStartOfAsmFile(Module &M) override; 139 140 void emitEndOfAsmFile(Module &M) override; 141 142 bool isBlockOnlyReachableByFallthrough( 143 const MachineBasicBlock *MBB) const override; 144 145 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo, 146 const char *ExtraCode, raw_ostream &O) override; 147 148 protected: 149 std::vector<std::string> DisasmLines, HexLines; 150 size_t DisasmLineMaxLen; 151 }; 152 153 } // end namespace llvm 154 155 #endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H 156