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No functional change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218497 91177308-0d34-0410-b5e6-96231b3b80d8
264 lines
9.6 KiB
C++
264 lines
9.6 KiB
C++
//===-- llvm/Target/TargetMachine.h - Target Information --------*- 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 defines the TargetMachine and LLVMTargetMachine classes.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_TARGETMACHINE_H
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#define LLVM_TARGET_TARGETMACHINE_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/CodeGen.h"
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#include "llvm/Target/TargetOptions.h"
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#include <cassert>
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#include <string>
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namespace llvm {
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class InstrItineraryData;
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class GlobalValue;
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class Mangler;
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class MCAsmInfo;
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class MCCodeGenInfo;
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class MCContext;
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class MCSymbol;
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class Target;
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class DataLayout;
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class TargetLibraryInfo;
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class TargetFrameLowering;
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class TargetIntrinsicInfo;
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class TargetLowering;
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class TargetPassConfig;
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class TargetRegisterInfo;
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class TargetSelectionDAGInfo;
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class TargetSubtargetInfo;
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class ScalarTargetTransformInfo;
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class VectorTargetTransformInfo;
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class formatted_raw_ostream;
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class raw_ostream;
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// The old pass manager infrastructure is hidden in a legacy namespace now.
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namespace legacy {
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class PassManagerBase;
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}
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using legacy::PassManagerBase;
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//===----------------------------------------------------------------------===//
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///
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/// TargetMachine - Primary interface to the complete machine description for
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/// the target machine. All target-specific information should be accessible
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/// through this interface.
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///
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class TargetMachine {
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TargetMachine(const TargetMachine &) LLVM_DELETED_FUNCTION;
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void operator=(const TargetMachine &) LLVM_DELETED_FUNCTION;
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protected: // Can only create subclasses.
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TargetMachine(const Target &T, StringRef TargetTriple,
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StringRef CPU, StringRef FS, const TargetOptions &Options);
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/// TheTarget - The Target that this machine was created for.
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const Target &TheTarget;
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/// TargetTriple, TargetCPU, TargetFS - Triple string, CPU name, and target
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/// feature strings the TargetMachine instance is created with.
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std::string TargetTriple;
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std::string TargetCPU;
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std::string TargetFS;
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/// CodeGenInfo - Low level target information such as relocation model.
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/// Non-const to allow resetting optimization level per-function.
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MCCodeGenInfo *CodeGenInfo;
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/// AsmInfo - Contains target specific asm information.
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///
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const MCAsmInfo *AsmInfo;
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unsigned RequireStructuredCFG : 1;
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public:
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mutable TargetOptions Options;
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virtual ~TargetMachine();
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const Target &getTarget() const { return TheTarget; }
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StringRef getTargetTriple() const { return TargetTriple; }
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StringRef getTargetCPU() const { return TargetCPU; }
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StringRef getTargetFeatureString() const { return TargetFS; }
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/// getSubtargetImpl - virtual method implemented by subclasses that returns
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/// a reference to that target's TargetSubtargetInfo-derived member variable.
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virtual const TargetSubtargetInfo *getSubtargetImpl() const {
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return nullptr;
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}
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virtual const TargetSubtargetInfo *getSubtargetImpl(const Function &) const {
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return getSubtargetImpl();
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}
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/// getSubtarget - This method returns a pointer to the specified type of
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/// TargetSubtargetInfo. In debug builds, it verifies that the object being
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/// returned is of the correct type.
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template<typename STC> const STC &getSubtarget() const {
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return *static_cast<const STC*>(getSubtargetImpl());
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}
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template <typename STC> const STC &getSubtarget(const Function *) const {
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return *static_cast<const STC*>(getSubtargetImpl());
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}
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/// \brief Reset the target options based on the function's attributes.
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// FIXME: Remove TargetOptions that affect per-function code generation
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// from TargetMachine.
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void resetTargetOptions(const Function &F) const;
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/// getMCAsmInfo - Return target specific asm information.
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///
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const MCAsmInfo *getMCAsmInfo() const { return AsmInfo; }
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/// getIntrinsicInfo - If intrinsic information is available, return it. If
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/// not, return null.
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///
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virtual const TargetIntrinsicInfo *getIntrinsicInfo() const {
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return nullptr;
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}
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bool requiresStructuredCFG() const { return RequireStructuredCFG; }
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void setRequiresStructuredCFG(bool Value) { RequireStructuredCFG = Value; }
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/// getRelocationModel - Returns the code generation relocation model. The
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/// choices are static, PIC, and dynamic-no-pic, and target default.
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Reloc::Model getRelocationModel() const;
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/// getCodeModel - Returns the code model. The choices are small, kernel,
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/// medium, large, and target default.
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CodeModel::Model getCodeModel() const;
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/// getTLSModel - Returns the TLS model which should be used for the given
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/// global variable.
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TLSModel::Model getTLSModel(const GlobalValue *GV) const;
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/// getOptLevel - Returns the optimization level: None, Less,
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/// Default, or Aggressive.
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CodeGenOpt::Level getOptLevel() const;
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/// \brief Overrides the optimization level.
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void setOptLevel(CodeGenOpt::Level Level) const;
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void setFastISel(bool Enable) { Options.EnableFastISel = Enable; }
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bool shouldPrintMachineCode() const { return Options.PrintMachineCode; }
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/// getAsmVerbosityDefault - Returns the default value of asm verbosity.
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///
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bool getAsmVerbosityDefault() const ;
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/// setAsmVerbosityDefault - Set the default value of asm verbosity. Default
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/// is false.
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void setAsmVerbosityDefault(bool);
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/// getDataSections - Return true if data objects should be emitted into their
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/// own section, corresponds to -fdata-sections.
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bool getDataSections() const;
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/// getFunctionSections - Return true if functions should be emitted into
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/// their own section, corresponding to -ffunction-sections.
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bool getFunctionSections() const;
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/// setDataSections - Set if the data are emit into separate sections.
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void setDataSections(bool);
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/// setFunctionSections - Set if the functions are emit into separate
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/// sections.
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void setFunctionSections(bool);
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/// \brief Register analysis passes for this target with a pass manager.
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virtual void addAnalysisPasses(PassManagerBase &) {}
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/// CodeGenFileType - These enums are meant to be passed into
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/// addPassesToEmitFile to indicate what type of file to emit, and returned by
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/// it to indicate what type of file could actually be made.
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enum CodeGenFileType {
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CGFT_AssemblyFile,
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CGFT_ObjectFile,
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CGFT_Null // Do not emit any output.
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};
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/// addPassesToEmitFile - Add passes to the specified pass manager to get the
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/// specified file emitted. Typically this will involve several steps of code
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/// generation. This method should return true if emission of this file type
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/// is not supported, or false on success.
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virtual bool addPassesToEmitFile(PassManagerBase &,
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formatted_raw_ostream &,
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CodeGenFileType,
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bool /*DisableVerify*/ = true,
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AnalysisID /*StartAfter*/ = nullptr,
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AnalysisID /*StopAfter*/ = nullptr) {
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return true;
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}
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/// addPassesToEmitMC - Add passes to the specified pass manager to get
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/// machine code emitted with the MCJIT. This method returns true if machine
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/// code is not supported. It fills the MCContext Ctx pointer which can be
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/// used to build custom MCStreamer.
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///
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virtual bool addPassesToEmitMC(PassManagerBase &,
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MCContext *&,
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raw_ostream &,
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bool /*DisableVerify*/ = true) {
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return true;
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}
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void getNameWithPrefix(SmallVectorImpl<char> &Name, const GlobalValue *GV,
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Mangler &Mang, bool MayAlwaysUsePrivate = false) const;
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MCSymbol *getSymbol(const GlobalValue *GV, Mangler &Mang) const;
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};
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/// LLVMTargetMachine - This class describes a target machine that is
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/// implemented with the LLVM target-independent code generator.
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///
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class LLVMTargetMachine : public TargetMachine {
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protected: // Can only create subclasses.
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LLVMTargetMachine(const Target &T, StringRef TargetTriple,
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StringRef CPU, StringRef FS, TargetOptions Options,
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Reloc::Model RM, CodeModel::Model CM,
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CodeGenOpt::Level OL);
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void initAsmInfo();
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public:
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/// \brief Register analysis passes for this target with a pass manager.
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///
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/// This registers target independent analysis passes.
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void addAnalysisPasses(PassManagerBase &PM) override;
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/// createPassConfig - Create a pass configuration object to be used by
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/// addPassToEmitX methods for generating a pipeline of CodeGen passes.
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virtual TargetPassConfig *createPassConfig(PassManagerBase &PM);
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/// addPassesToEmitFile - Add passes to the specified pass manager to get the
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/// specified file emitted. Typically this will involve several steps of code
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/// generation.
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bool addPassesToEmitFile(PassManagerBase &PM, formatted_raw_ostream &Out,
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CodeGenFileType FileType, bool DisableVerify = true,
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AnalysisID StartAfter = nullptr,
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AnalysisID StopAfter = nullptr) override;
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/// addPassesToEmitMC - Add passes to the specified pass manager to get
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/// machine code emitted with the MCJIT. This method returns true if machine
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/// code is not supported. It fills the MCContext Ctx pointer which can be
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/// used to build custom MCStreamer.
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///
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bool addPassesToEmitMC(PassManagerBase &PM, MCContext *&Ctx,
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raw_ostream &OS, bool DisableVerify = true) override;
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};
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} // End llvm namespace
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#endif
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