forked from OSchip/llvm-project
134 lines
4.5 KiB
C++
134 lines
4.5 KiB
C++
//===-- ARMAsmPrinter.h - ARM implementation of AsmPrinter ------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_ARM_ARMASMPRINTER_H
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#define LLVM_LIB_TARGET_ARM_ARMASMPRINTER_H
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#include "ARMSubtarget.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/Target/TargetMachine.h"
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namespace llvm {
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class ARMFunctionInfo;
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class MCOperand;
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class MachineConstantPool;
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class MachineOperand;
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class MCSymbol;
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namespace ARM {
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enum DW_ISA {
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DW_ISA_ARM_thumb = 1,
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DW_ISA_ARM_arm = 2
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};
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}
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class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter {
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/// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
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/// make the right decision when printing asm code for different targets.
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const ARMSubtarget *Subtarget;
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/// AFI - Keep a pointer to ARMFunctionInfo for the current
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/// MachineFunction.
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ARMFunctionInfo *AFI;
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/// MCP - Keep a pointer to constantpool entries of the current
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/// MachineFunction.
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const MachineConstantPool *MCP;
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/// InConstantPool - Maintain state when emitting a sequence of constant
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/// pool entries so we can properly mark them as data regions.
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bool InConstantPool;
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/// ThumbIndirectPads - These maintain a per-function list of jump pad
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/// labels used for ARMv4t thumb code to make register indirect calls.
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SmallVector<std::pair<unsigned, MCSymbol*>, 4> ThumbIndirectPads;
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public:
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explicit ARMAsmPrinter(TargetMachine &TM,
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std::unique_ptr<MCStreamer> Streamer);
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const char *getPassName() const override {
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return "ARM Assembly / Object Emitter";
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}
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void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O);
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bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
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unsigned AsmVariant, const char *ExtraCode,
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raw_ostream &O) override;
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bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
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unsigned AsmVariant, const char *ExtraCode,
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raw_ostream &O) override;
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void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
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const MCSubtargetInfo *EndInfo) const override;
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void EmitJumpTableAddrs(const MachineInstr *MI);
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void EmitJumpTableInsts(const MachineInstr *MI);
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void EmitJumpTableTBInst(const MachineInstr *MI, unsigned OffsetWidth);
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void EmitInstruction(const MachineInstr *MI) override;
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bool runOnMachineFunction(MachineFunction &F) override;
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void EmitConstantPool() override {
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// we emit constant pools customly!
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}
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void EmitFunctionBodyEnd() override;
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void EmitFunctionEntryLabel() override;
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void EmitStartOfAsmFile(Module &M) override;
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void EmitEndOfAsmFile(Module &M) override;
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void EmitXXStructor(const Constant *CV) override;
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// lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
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bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
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private:
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// Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
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void emitAttributes();
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// Generic helper used to emit e.g. ARMv5 mul pseudos
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void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc);
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void EmitUnwindingInstruction(const MachineInstr *MI);
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// emitPseudoExpansionLowering - tblgen'erated.
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bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
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const MachineInstr *MI);
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public:
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unsigned getISAEncoding() override {
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// ARM/Darwin adds ISA to the DWARF info for each function.
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const Triple &TT = TM.getTargetTriple();
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if (!TT.isOSBinFormatMachO())
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return 0;
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bool isThumb = TT.getArch() == Triple::thumb ||
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TT.getArch() == Triple::thumbeb ||
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TT.getSubArch() == Triple::ARMSubArch_v7m ||
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TT.getSubArch() == Triple::ARMSubArch_v6m;
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return isThumb ? ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm;
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}
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private:
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MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol);
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MCSymbol *GetARMJTIPICJumpTableLabel(unsigned uid) const;
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MCSymbol *GetARMSJLJEHLabel() const;
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MCSymbol *GetARMGVSymbol(const GlobalValue *GV, unsigned char TargetFlags);
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public:
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/// EmitMachineConstantPoolValue - Print a machine constantpool value to
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/// the .s file.
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void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) override;
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};
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} // end namespace llvm
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#endif
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