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0aba46f4cd
The ARM backend has been using most of the MachO related subtarget checks almost interchangeably, and since the only target it's had to run on has been IOS (which is all three of MachO, Darwin and IOS) it's worked out OK so far. But we'd like to support embedded targets under the "*-*-none-macho" triple, which means everything starts falling apart and inconsistent behaviours emerge. This patch should pick a reasonably sensible set of behaviours for the new triple (and any others that come along, with luck). Some choices were debatable (notably FP == r7 or r11), but we can revisit those later when deficiencies become apparent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198617 91177308-0d34-0410-b5e6-96231b3b80d8
129 lines
4.3 KiB
C++
129 lines
4.3 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 ARMASMPRINTER_H
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#define ARMASMPRINTER_H
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#include "ARM.h"
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#include "ARMTargetMachine.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/Support/Compiler.h"
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namespace llvm {
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class MCOperand;
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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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public:
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explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
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: AsmPrinter(TM, Streamer), AFI(NULL), MCP(NULL), InConstantPool(false) {
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Subtarget = &TM.getSubtarget<ARMSubtarget>();
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}
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virtual const char *getPassName() const LLVM_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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const char *Modifier = 0);
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virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
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unsigned AsmVariant, const char *ExtraCode,
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raw_ostream &O) LLVM_OVERRIDE;
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virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
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unsigned AsmVariant, const char *ExtraCode,
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raw_ostream &O) LLVM_OVERRIDE;
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void EmitJumpTable(const MachineInstr *MI);
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void EmitJump2Table(const MachineInstr *MI);
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virtual void EmitInstruction(const MachineInstr *MI) LLVM_OVERRIDE;
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virtual bool runOnMachineFunction(MachineFunction &F) LLVM_OVERRIDE;
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virtual void EmitConstantPool() LLVM_OVERRIDE {
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// we emit constant pools customly!
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}
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virtual void EmitFunctionBodyEnd() LLVM_OVERRIDE;
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virtual void EmitFunctionEntryLabel() LLVM_OVERRIDE;
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virtual void EmitStartOfAsmFile(Module &M) LLVM_OVERRIDE;
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virtual void EmitEndOfAsmFile(Module &M) LLVM_OVERRIDE;
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virtual void EmitXXStructor(const Constant *CV) LLVM_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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// Helper for ELF .o only
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void emitARMAttributeSection();
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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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/// EmitDwarfRegOp - Emit dwarf register operation.
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virtual void EmitDwarfRegOp(const MachineLocation &MLoc, bool Indirect) const
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LLVM_OVERRIDE;
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virtual unsigned getISAEncoding() LLVM_OVERRIDE {
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// ARM/Darwin adds ISA to the DWARF info for each function.
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if (!Subtarget->isTargetMachO())
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return 0;
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return Subtarget->isThumb() ?
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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 *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) 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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virtual void
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EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) LLVM_OVERRIDE;
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};
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} // end namespace llvm
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#endif
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