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48814681d7
- Greatly improve the comments to the getLSDAEncoding method. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93796 91177308-0d34-0410-b5e6-96231b3b80d8
117 lines
4.6 KiB
C++
117 lines
4.6 KiB
C++
//===-- X86TargetMachine.h - Define TargetMachine for the X86 ---*- 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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//
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// This file declares the X86 specific subclass of TargetMachine.
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//
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//===----------------------------------------------------------------------===//
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#ifndef X86TARGETMACHINE_H
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#define X86TARGETMACHINE_H
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetFrameInfo.h"
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#include "X86.h"
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#include "X86ELFWriterInfo.h"
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#include "X86InstrInfo.h"
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#include "X86JITInfo.h"
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#include "X86Subtarget.h"
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#include "X86ISelLowering.h"
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namespace llvm {
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class formatted_raw_ostream;
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class X86TargetMachine : public LLVMTargetMachine {
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X86Subtarget Subtarget;
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const TargetData DataLayout; // Calculates type size & alignment
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TargetFrameInfo FrameInfo;
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X86InstrInfo InstrInfo;
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X86JITInfo JITInfo;
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X86TargetLowering TLInfo;
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X86ELFWriterInfo ELFWriterInfo;
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Reloc::Model DefRelocModel; // Reloc model before it's overridden.
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private:
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// We have specific defaults for X86.
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virtual void setCodeModelForJIT();
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virtual void setCodeModelForStatic();
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public:
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X86TargetMachine(const Target &T, const std::string &TT,
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const std::string &FS, bool is64Bit);
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virtual const X86InstrInfo *getInstrInfo() const { return &InstrInfo; }
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virtual const TargetFrameInfo *getFrameInfo() const { return &FrameInfo; }
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virtual X86JITInfo *getJITInfo() { return &JITInfo; }
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virtual const X86Subtarget *getSubtargetImpl() const{ return &Subtarget; }
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virtual X86TargetLowering *getTargetLowering() const {
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return const_cast<X86TargetLowering*>(&TLInfo);
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}
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virtual const X86RegisterInfo *getRegisterInfo() const {
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return &InstrInfo.getRegisterInfo();
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}
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virtual const TargetData *getTargetData() const { return &DataLayout; }
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virtual const X86ELFWriterInfo *getELFWriterInfo() const {
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return Subtarget.isTargetELF() ? &ELFWriterInfo : 0;
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}
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/// getLSDAEncoding - Returns the LSDA pointer encoding. The choices are
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/// 4-byte, 8-byte, and target default. The CIE is hard-coded to indicate that
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/// the LSDA pointer in the FDE section is an "sdata4", and should be encoded
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/// as a 4-byte pointer by default. However, some systems may require a
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/// different size due to bugs or other conditions. We will default to a
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/// 4-byte encoding unless the system tells us otherwise.
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///
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/// FIXME: This call-back isn't good! We should be using the correct encoding
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/// regardless of the system. However, there are some systems which have bugs
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/// that prevent this from occuring.
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virtual DwarfLSDAEncoding::Encoding getLSDAEncoding() const;
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// Set up the pass pipeline.
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virtual bool addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel);
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virtual bool addPreRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel);
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virtual bool addPostRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel);
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virtual bool addCodeEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel,
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MachineCodeEmitter &MCE);
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virtual bool addCodeEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel,
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JITCodeEmitter &JCE);
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virtual bool addCodeEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel,
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ObjectCodeEmitter &OCE);
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virtual bool addSimpleCodeEmitter(PassManagerBase &PM,
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CodeGenOpt::Level OptLevel,
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MachineCodeEmitter &MCE);
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virtual bool addSimpleCodeEmitter(PassManagerBase &PM,
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CodeGenOpt::Level OptLevel,
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JITCodeEmitter &JCE);
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virtual bool addSimpleCodeEmitter(PassManagerBase &PM,
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CodeGenOpt::Level OptLevel,
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ObjectCodeEmitter &OCE);
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};
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/// X86_32TargetMachine - X86 32-bit target machine.
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///
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class X86_32TargetMachine : public X86TargetMachine {
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public:
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X86_32TargetMachine(const Target &T, const std::string &M,
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const std::string &FS);
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};
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/// X86_64TargetMachine - X86 64-bit target machine.
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///
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class X86_64TargetMachine : public X86TargetMachine {
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public:
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X86_64TargetMachine(const Target &T, const std::string &TT,
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const std::string &FS);
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};
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} // End llvm namespace
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#endif
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