llvm-6502/include/llvm/Target/TargetMachine.h
Chandler Carruth 34797136cb Move the TLSModel information into the TargetMachine rather than hiding
in TargetLowering. There was already a FIXME about this location being
odd. The interface is simplified as a consequence. This will also make
it easier to change TLS models when compiling with PIE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154292 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-08 17:20:55 +00:00

334 lines
13 KiB
C++

//===-- llvm/Target/TargetMachine.h - Target Information --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the TargetMachine and LLVMTargetMachine classes.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_TARGETMACHINE_H
#define LLVM_TARGET_TARGETMACHINE_H
#include "llvm/Support/CodeGen.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/StringRef.h"
#include <cassert>
#include <string>
namespace llvm {
class InstrItineraryData;
class JITCodeEmitter;
class GlobalValue;
class MCAsmInfo;
class MCCodeGenInfo;
class MCContext;
class PassManagerBase;
class Target;
class TargetData;
class TargetELFWriterInfo;
class TargetFrameLowering;
class TargetInstrInfo;
class TargetIntrinsicInfo;
class TargetJITInfo;
class TargetLowering;
class TargetPassConfig;
class TargetRegisterInfo;
class TargetSelectionDAGInfo;
class TargetSubtargetInfo;
class formatted_raw_ostream;
class raw_ostream;
//===----------------------------------------------------------------------===//
///
/// TargetMachine - Primary interface to the complete machine description for
/// the target machine. All target-specific information should be accessible
/// through this interface.
///
class TargetMachine {
TargetMachine(const TargetMachine &); // DO NOT IMPLEMENT
void operator=(const TargetMachine &); // DO NOT IMPLEMENT
protected: // Can only create subclasses.
TargetMachine(const Target &T, StringRef TargetTriple,
StringRef CPU, StringRef FS, const TargetOptions &Options);
/// getSubtargetImpl - virtual method implemented by subclasses that returns
/// a reference to that target's TargetSubtargetInfo-derived member variable.
virtual const TargetSubtargetInfo *getSubtargetImpl() const { return 0; }
/// TheTarget - The Target that this machine was created for.
const Target &TheTarget;
/// TargetTriple, TargetCPU, TargetFS - Triple string, CPU name, and target
/// feature strings the TargetMachine instance is created with.
std::string TargetTriple;
std::string TargetCPU;
std::string TargetFS;
/// CodeGenInfo - Low level target information such as relocation model.
const MCCodeGenInfo *CodeGenInfo;
/// AsmInfo - Contains target specific asm information.
///
const MCAsmInfo *AsmInfo;
unsigned MCRelaxAll : 1;
unsigned MCNoExecStack : 1;
unsigned MCSaveTempLabels : 1;
unsigned MCUseLoc : 1;
unsigned MCUseCFI : 1;
unsigned MCUseDwarfDirectory : 1;
public:
virtual ~TargetMachine();
const Target &getTarget() const { return TheTarget; }
const StringRef getTargetTriple() const { return TargetTriple; }
const StringRef getTargetCPU() const { return TargetCPU; }
const StringRef getTargetFeatureString() const { return TargetFS; }
TargetOptions Options;
// Interfaces to the major aspects of target machine information:
// -- Instruction opcode and operand information
// -- Pipelines and scheduling information
// -- Stack frame information
// -- Selection DAG lowering information
//
virtual const TargetInstrInfo *getInstrInfo() const { return 0; }
virtual const TargetFrameLowering *getFrameLowering() const { return 0; }
virtual const TargetLowering *getTargetLowering() const { return 0; }
virtual const TargetSelectionDAGInfo *getSelectionDAGInfo() const{ return 0; }
virtual const TargetData *getTargetData() const { return 0; }
/// getMCAsmInfo - Return target specific asm information.
///
const MCAsmInfo *getMCAsmInfo() const { return AsmInfo; }
/// getSubtarget - This method returns a pointer to the specified type of
/// TargetSubtargetInfo. In debug builds, it verifies that the object being
/// returned is of the correct type.
template<typename STC> const STC &getSubtarget() const {
return *static_cast<const STC*>(getSubtargetImpl());
}
/// getRegisterInfo - If register information is available, return it. If
/// not, return null. This is kept separate from RegInfo until RegInfo has
/// details of graph coloring register allocation removed from it.
///
virtual const TargetRegisterInfo *getRegisterInfo() const { return 0; }
/// getIntrinsicInfo - If intrinsic information is available, return it. If
/// not, return null.
///
virtual const TargetIntrinsicInfo *getIntrinsicInfo() const { return 0; }
/// getJITInfo - If this target supports a JIT, return information for it,
/// otherwise return null.
///
virtual TargetJITInfo *getJITInfo() { return 0; }
/// getInstrItineraryData - Returns instruction itinerary data for the target
/// or specific subtarget.
///
virtual const InstrItineraryData *getInstrItineraryData() const {
return 0;
}
/// getELFWriterInfo - If this target supports an ELF writer, return
/// information for it, otherwise return null.
///
virtual const TargetELFWriterInfo *getELFWriterInfo() const { return 0; }
/// hasMCRelaxAll - Check whether all machine code instructions should be
/// relaxed.
bool hasMCRelaxAll() const { return MCRelaxAll; }
/// setMCRelaxAll - Set whether all machine code instructions should be
/// relaxed.
void setMCRelaxAll(bool Value) { MCRelaxAll = Value; }
/// hasMCSaveTempLabels - Check whether temporary labels will be preserved
/// (i.e., not treated as temporary).
bool hasMCSaveTempLabels() const { return MCSaveTempLabels; }
/// setMCSaveTempLabels - Set whether temporary labels will be preserved
/// (i.e., not treated as temporary).
void setMCSaveTempLabels(bool Value) { MCSaveTempLabels = Value; }
/// hasMCNoExecStack - Check whether an executable stack is not needed.
bool hasMCNoExecStack() const { return MCNoExecStack; }
/// setMCNoExecStack - Set whether an executabel stack is not needed.
void setMCNoExecStack(bool Value) { MCNoExecStack = Value; }
/// hasMCUseLoc - Check whether we should use dwarf's .loc directive.
bool hasMCUseLoc() const { return MCUseLoc; }
/// setMCUseLoc - Set whether all we should use dwarf's .loc directive.
void setMCUseLoc(bool Value) { MCUseLoc = Value; }
/// hasMCUseCFI - Check whether we should use dwarf's .cfi_* directives.
bool hasMCUseCFI() const { return MCUseCFI; }
/// setMCUseCFI - Set whether all we should use dwarf's .cfi_* directives.
void setMCUseCFI(bool Value) { MCUseCFI = Value; }
/// hasMCUseDwarfDirectory - Check whether we should use .file directives with
/// explicit directories.
bool hasMCUseDwarfDirectory() const { return MCUseDwarfDirectory; }
/// setMCUseDwarfDirectory - Set whether all we should use .file directives
/// with explicit directories.
void setMCUseDwarfDirectory(bool Value) { MCUseDwarfDirectory = Value; }
/// getRelocationModel - Returns the code generation relocation model. The
/// choices are static, PIC, and dynamic-no-pic, and target default.
Reloc::Model getRelocationModel() const;
/// getCodeModel - Returns the code model. The choices are small, kernel,
/// medium, large, and target default.
CodeModel::Model getCodeModel() const;
/// getTLSModel - Returns the TLS model which should be used for the given
/// global variable.
TLSModel::Model getTLSModel(const GlobalValue *GV) const;
/// getOptLevel - Returns the optimization level: None, Less,
/// Default, or Aggressive.
CodeGenOpt::Level getOptLevel() const;
void setFastISel(bool Enable) { Options.EnableFastISel = Enable; }
bool shouldPrintMachineCode() const { return Options.PrintMachineCode; }
/// getAsmVerbosityDefault - Returns the default value of asm verbosity.
///
static bool getAsmVerbosityDefault();
/// setAsmVerbosityDefault - Set the default value of asm verbosity. Default
/// is false.
static void setAsmVerbosityDefault(bool);
/// getDataSections - Return true if data objects should be emitted into their
/// own section, corresponds to -fdata-sections.
static bool getDataSections();
/// getFunctionSections - Return true if functions should be emitted into
/// their own section, corresponding to -ffunction-sections.
static bool getFunctionSections();
/// setDataSections - Set if the data are emit into separate sections.
static void setDataSections(bool);
/// setFunctionSections - Set if the functions are emit into separate
/// sections.
static void setFunctionSections(bool);
/// CodeGenFileType - These enums are meant to be passed into
/// addPassesToEmitFile to indicate what type of file to emit, and returned by
/// it to indicate what type of file could actually be made.
enum CodeGenFileType {
CGFT_AssemblyFile,
CGFT_ObjectFile,
CGFT_Null // Do not emit any output.
};
/// addPassesToEmitFile - Add passes to the specified pass manager to get the
/// specified file emitted. Typically this will involve several steps of code
/// generation. This method should return true if emission of this file type
/// is not supported, or false on success.
virtual bool addPassesToEmitFile(PassManagerBase &,
formatted_raw_ostream &,
CodeGenFileType,
bool /*DisableVerify*/ = true) {
return true;
}
/// addPassesToEmitMachineCode - Add passes to the specified pass manager to
/// get machine code emitted. This uses a JITCodeEmitter object to handle
/// actually outputting the machine code and resolving things like the address
/// of functions. This method returns true if machine code emission is
/// not supported.
///
virtual bool addPassesToEmitMachineCode(PassManagerBase &,
JITCodeEmitter &,
bool /*DisableVerify*/ = true) {
return true;
}
/// addPassesToEmitMC - Add passes to the specified pass manager to get
/// machine code emitted with the MCJIT. This method returns true if machine
/// code is not supported. It fills the MCContext Ctx pointer which can be
/// used to build custom MCStreamer.
///
virtual bool addPassesToEmitMC(PassManagerBase &,
MCContext *&,
raw_ostream &,
bool /*DisableVerify*/ = true) {
return true;
}
};
/// LLVMTargetMachine - This class describes a target machine that is
/// implemented with the LLVM target-independent code generator.
///
class LLVMTargetMachine : public TargetMachine {
protected: // Can only create subclasses.
LLVMTargetMachine(const Target &T, StringRef TargetTriple,
StringRef CPU, StringRef FS, TargetOptions Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL);
public:
/// createPassConfig - Create a pass configuration object to be used by
/// addPassToEmitX methods for generating a pipeline of CodeGen passes.
virtual TargetPassConfig *createPassConfig(PassManagerBase &PM);
/// addPassesToEmitFile - Add passes to the specified pass manager to get the
/// specified file emitted. Typically this will involve several steps of code
/// generation.
virtual bool addPassesToEmitFile(PassManagerBase &PM,
formatted_raw_ostream &Out,
CodeGenFileType FileType,
bool DisableVerify = true);
/// addPassesToEmitMachineCode - Add passes to the specified pass manager to
/// get machine code emitted. This uses a JITCodeEmitter object to handle
/// actually outputting the machine code and resolving things like the address
/// of functions. This method returns true if machine code emission is
/// not supported.
///
virtual bool addPassesToEmitMachineCode(PassManagerBase &PM,
JITCodeEmitter &MCE,
bool DisableVerify = true);
/// addPassesToEmitMC - Add passes to the specified pass manager to get
/// machine code emitted with the MCJIT. This method returns true if machine
/// code is not supported. It fills the MCContext Ctx pointer which can be
/// used to build custom MCStreamer.
///
virtual bool addPassesToEmitMC(PassManagerBase &PM,
MCContext *&Ctx,
raw_ostream &OS,
bool DisableVerify = true);
/// addCodeEmitter - This pass should be overridden by the target to add a
/// code emitter, if supported. If this is not supported, 'true' should be
/// returned.
virtual bool addCodeEmitter(PassManagerBase &,
JITCodeEmitter &) {
return true;
}
};
} // End llvm namespace
#endif