33cb8f5b54
The +DumpCode attribute is a horrible hack in AMDGPU to embed the disassembly of the generated code into the elf file. It is used by LLPC to implement an extension that allows the application to read back the disassembly of the code. Longer term, we should re-implement that by using the LLVM disassembler from the Vulkan driver. Recent LLVM changes broke +DumpCode. With -filetype=asm it crashed, and with -filetype=obj I think it did not include any instructions, only the labels. Fixed with this commit: now it has no effect with -filetype=asm, and works as intended with -filetype=obj. Differential Revision: https://reviews.llvm.org/D60682 Change-Id: I6436d86fe2ea220d74a643a85e64753747c9366b llvm-svn: 360688
150 lines
5.0 KiB
C++
150 lines
5.0 KiB
C++
//===-- AMDGPUAsmPrinter.h - Print AMDGPU assembly code ---------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// AMDGPU Assembly printer class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H
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#define LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H
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#include "AMDGPU.h"
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#include "AMDKernelCodeT.h"
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#include "AMDGPUHSAMetadataStreamer.h"
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#include "SIProgramInfo.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/Support/AMDHSAKernelDescriptor.h"
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#include <cstddef>
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#include <cstdint>
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#include <limits>
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#include <memory>
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#include <string>
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#include <vector>
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namespace llvm {
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class AMDGPUMachineFunction;
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class AMDGPUTargetStreamer;
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class MCCodeEmitter;
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class MCOperand;
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class GCNSubtarget;
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class AMDGPUAsmPrinter final : public AsmPrinter {
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private:
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// Track resource usage for callee functions.
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struct SIFunctionResourceInfo {
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// Track the number of explicitly used VGPRs. Special registers reserved at
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// the end are tracked separately.
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int32_t NumVGPR = 0;
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int32_t NumExplicitSGPR = 0;
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uint64_t PrivateSegmentSize = 0;
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bool UsesVCC = false;
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bool UsesFlatScratch = false;
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bool HasDynamicallySizedStack = false;
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bool HasRecursion = false;
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int32_t getTotalNumSGPRs(const GCNSubtarget &ST) const;
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};
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SIProgramInfo CurrentProgramInfo;
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DenseMap<const Function *, SIFunctionResourceInfo> CallGraphResourceInfo;
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std::unique_ptr<AMDGPU::HSAMD::MetadataStreamer> HSAMetadataStream;
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MCCodeEmitter *DumpCodeInstEmitter = nullptr;
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uint64_t getFunctionCodeSize(const MachineFunction &MF) const;
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SIFunctionResourceInfo analyzeResourceUsage(const MachineFunction &MF) const;
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void getSIProgramInfo(SIProgramInfo &Out, const MachineFunction &MF);
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void getAmdKernelCode(amd_kernel_code_t &Out, const SIProgramInfo &KernelInfo,
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const MachineFunction &MF) const;
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void findNumUsedRegistersSI(const MachineFunction &MF,
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unsigned &NumSGPR,
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unsigned &NumVGPR) const;
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/// Emit register usage information so that the GPU driver
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/// can correctly setup the GPU state.
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void EmitProgramInfoSI(const MachineFunction &MF,
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const SIProgramInfo &KernelInfo);
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void EmitPALMetadata(const MachineFunction &MF,
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const SIProgramInfo &KernelInfo);
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void emitCommonFunctionComments(uint32_t NumVGPR,
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uint32_t NumSGPR,
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uint64_t ScratchSize,
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uint64_t CodeSize,
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const AMDGPUMachineFunction* MFI);
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uint16_t getAmdhsaKernelCodeProperties(
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const MachineFunction &MF) const;
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amdhsa::kernel_descriptor_t getAmdhsaKernelDescriptor(
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const MachineFunction &MF,
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const SIProgramInfo &PI) const;
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public:
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explicit AMDGPUAsmPrinter(TargetMachine &TM,
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std::unique_ptr<MCStreamer> Streamer);
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StringRef getPassName() const override;
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const MCSubtargetInfo* getGlobalSTI() const;
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AMDGPUTargetStreamer* getTargetStreamer() const;
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bool doFinalization(Module &M) override;
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bool runOnMachineFunction(MachineFunction &MF) override;
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/// Wrapper for MCInstLowering.lowerOperand() for the tblgen'erated
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/// pseudo lowering.
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bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp) const;
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/// Lower the specified LLVM Constant to an MCExpr.
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/// The AsmPrinter::lowerConstantof does not know how to lower
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/// addrspacecast, therefore they should be lowered by this function.
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const MCExpr *lowerConstant(const Constant *CV) override;
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/// tblgen'erated driver function for lowering simple MI->MC pseudo
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/// instructions.
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bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
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const MachineInstr *MI);
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/// Implemented in AMDGPUMCInstLower.cpp
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void EmitInstruction(const MachineInstr *MI) override;
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void EmitFunctionBodyStart() override;
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void EmitFunctionBodyEnd() override;
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void EmitFunctionEntryLabel() override;
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void EmitBasicBlockStart(const MachineBasicBlock &MBB) const override;
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void EmitGlobalVariable(const GlobalVariable *GV) override;
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void EmitStartOfAsmFile(Module &M) override;
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void EmitEndOfAsmFile(Module &M) override;
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bool isBlockOnlyReachableByFallthrough(
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const MachineBasicBlock *MBB) const override;
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bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
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const char *ExtraCode, raw_ostream &O) override;
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protected:
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mutable std::vector<std::string> DisasmLines, HexLines;
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mutable size_t DisasmLineMaxLen;
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUASMPRINTER_H
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