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llvm-6502/include/llvm/Target/TargetMachine.h
Eric Christopher c9d0715997 Make the TargetMachine::getSubtarget that takes a Function argument
take a reference to match the getSubtargetImpl that takes a Function
argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229994 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-20 07:32:59 +00:00

276 lines
9.9 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/ADT/StringRef.h"
#include "llvm/Pass.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Target/TargetOptions.h"
#include <cassert>
#include <string>
namespace llvm {
class InstrItineraryData;
class GlobalValue;
class Mangler;
class MCAsmInfo;
class MCCodeGenInfo;
class MCContext;
class MCSymbol;
class Target;
class DataLayout;
class TargetLibraryInfo;
class TargetFrameLowering;
class TargetIRAnalysis;
class TargetIntrinsicInfo;
class TargetLowering;
class TargetPassConfig;
class TargetRegisterInfo;
class TargetSelectionDAGInfo;
class TargetSubtargetInfo;
class TargetTransformInfo;
class formatted_raw_ostream;
class raw_ostream;
class TargetLoweringObjectFile;
// The old pass manager infrastructure is hidden in a legacy namespace now.
namespace legacy {
class PassManagerBase;
}
using legacy::PassManagerBase;
//===----------------------------------------------------------------------===//
///
/// 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 &) = delete;
void operator=(const TargetMachine &) = delete;
protected: // Can only create subclasses.
TargetMachine(const Target &T, StringRef TargetTriple,
StringRef CPU, StringRef FS, const TargetOptions &Options);
/// 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.
/// Non-const to allow resetting optimization level per-function.
MCCodeGenInfo *CodeGenInfo;
/// AsmInfo - Contains target specific asm information.
///
const MCAsmInfo *AsmInfo;
unsigned RequireStructuredCFG : 1;
public:
mutable TargetOptions Options;
virtual ~TargetMachine();
const Target &getTarget() const { return TheTarget; }
StringRef getTargetTriple() const { return TargetTriple; }
StringRef getTargetCPU() const { return TargetCPU; }
StringRef getTargetFeatureString() const { return TargetFS; }
/// getSubtargetImpl - virtual method implemented by subclasses that returns
/// a reference to that target's TargetSubtargetInfo-derived member variable.
virtual const TargetSubtargetInfo *getSubtargetImpl() const {
return nullptr;
}
virtual const TargetSubtargetInfo *getSubtargetImpl(const Function &) const {
return getSubtargetImpl();
}
virtual TargetLoweringObjectFile *getObjFileLowering() const {
return nullptr;
}
/// 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());
}
template <typename STC> const STC &getSubtarget(const Function &) const {
return *static_cast<const STC*>(getSubtargetImpl());
}
/// getDataLayout - This method returns a pointer to the DataLayout for
/// the target. It should be unchanging for every subtarget.
virtual const DataLayout *getDataLayout() const {
return nullptr;
}
/// \brief Reset the target options based on the function's attributes.
// FIXME: Remove TargetOptions that affect per-function code generation
// from TargetMachine.
void resetTargetOptions(const Function &F) const;
/// getMCAsmInfo - Return target specific asm information.
///
const MCAsmInfo *getMCAsmInfo() const { return AsmInfo; }
/// getIntrinsicInfo - If intrinsic information is available, return it. If
/// not, return null.
///
virtual const TargetIntrinsicInfo *getIntrinsicInfo() const {
return nullptr;
}
bool requiresStructuredCFG() const { return RequireStructuredCFG; }
void setRequiresStructuredCFG(bool Value) { RequireStructuredCFG = 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;
/// \brief Overrides the optimization level.
void setOptLevel(CodeGenOpt::Level Level) const;
void setFastISel(bool Enable) { Options.EnableFastISel = Enable; }
bool shouldPrintMachineCode() const { return Options.PrintMachineCode; }
/// Returns the default value of asm verbosity.
///
bool getAsmVerbosityDefault() const {
return Options.MCOptions.AsmVerbose;
}
bool getUniqueSectionNames() const { return Options.UniqueSectionNames; }
/// Return true if data objects should be emitted into their own section,
/// corresponds to -fdata-sections.
bool getDataSections() const {
return Options.DataSections;
}
/// Return true if functions should be emitted into their own section,
/// corresponding to -ffunction-sections.
bool getFunctionSections() const {
return Options.FunctionSections;
}
/// \brief Get a \c TargetIRAnalysis appropriate for the target.
///
/// This is used to construct the new pass manager's target IR analysis pass,
/// set up appropriately for this target machine. Even the old pass manager
/// uses this to answer queries about the IR.
virtual TargetIRAnalysis getTargetIRAnalysis();
/// 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,
AnalysisID /*StartAfter*/ = nullptr,
AnalysisID /*StopAfter*/ = nullptr) {
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;
}
void getNameWithPrefix(SmallVectorImpl<char> &Name, const GlobalValue *GV,
Mangler &Mang, bool MayAlwaysUsePrivate = false) const;
MCSymbol *getSymbol(const GlobalValue *GV, Mangler &Mang) const;
};
/// 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);
void initAsmInfo();
public:
/// \brief Get a TargetIRAnalysis implementation for the target.
///
/// This analysis will produce a TTI result which uses the common code
/// generator to answer queries about the IR.
TargetIRAnalysis getTargetIRAnalysis() override;
/// 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.
bool addPassesToEmitFile(PassManagerBase &PM, formatted_raw_ostream &Out,
CodeGenFileType FileType, bool DisableVerify = true,
AnalysisID StartAfter = nullptr,
AnalysisID StopAfter = nullptr) override;
/// 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.
///
bool addPassesToEmitMC(PassManagerBase &PM, MCContext *&Ctx,
raw_ostream &OS, bool DisableVerify = true) override;
};
} // End llvm namespace
#endif