X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FTarget%2FTargetMachine.h;h=b69f94707423bdc059808f2a71a0c2edd21a223d;hb=a15d888abf962a3b10d74a2a3a2cc73d83018da6;hp=627ab427ef83ff1e29e9d95c0540ca4bbdf5b9b2;hpb=a7b8c2b6a416052bd7b48d3c0d702d266c6ac3a2;p=oota-llvm.git diff --git a/include/llvm/Target/TargetMachine.h b/include/llvm/Target/TargetMachine.h index 627ab427ef8..b69f9470742 100644 --- a/include/llvm/Target/TargetMachine.h +++ b/include/llvm/Target/TargetMachine.h @@ -14,387 +14,264 @@ #ifndef LLVM_TARGET_TARGETMACHINE_H #define LLVM_TARGET_TARGETMACHINE_H -#include "llvm/Target/TargetInstrItineraries.h" +#include "llvm/ADT/StringRef.h" +#include "llvm/ADT/Triple.h" +#include "llvm/IR/DataLayout.h" +#include "llvm/Pass.h" +#include "llvm/Support/CodeGen.h" +#include "llvm/Target/TargetOptions.h" #include #include namespace llvm { -class Target; +class InstrItineraryData; +class GlobalValue; +class Mangler; +class MachineFunctionInitializer; class MCAsmInfo; -class TargetData; -class TargetSubtarget; -class TargetInstrInfo; +class MCCodeGenInfo; +class MCContext; +class MCInstrInfo; +class MCRegisterInfo; +class MCSubtargetInfo; +class MCSymbol; +class Target; +class DataLayout; +class TargetLibraryInfo; +class TargetFrameLowering; +class TargetIRAnalysis; class TargetIntrinsicInfo; -class TargetJITInfo; class TargetLowering; -class TargetSelectionDAGInfo; -class TargetFrameLowering; -class JITCodeEmitter; -class MCContext; +class TargetPassConfig; class TargetRegisterInfo; -class PassManagerBase; -class PassManager; -class Pass; -class TargetELFWriterInfo; +class TargetSelectionDAGInfo; +class TargetSubtargetInfo; +class TargetTransformInfo; class formatted_raw_ostream; class raw_ostream; +class raw_pwrite_stream; +class TargetLoweringObjectFile; -// Relocation model types. -namespace Reloc { - enum Model { - Default, - Static, - PIC_, // Cannot be named PIC due to collision with -DPIC - DynamicNoPIC - }; -} - -// Code model types. -namespace CodeModel { - enum Model { - Default, - Small, - Kernel, - Medium, - Large - }; -} - -// Code generation optimization level. -namespace CodeGenOpt { - enum Level { - None, // -O0 - Less, // -O1 - Default, // -O2, -Os - Aggressive // -O3 - }; -} - -namespace Sched { - enum Preference { - None, // No preference - Latency, // Scheduling for shortest total latency. - RegPressure, // Scheduling for lowest register pressure. - Hybrid, // Scheduling for both latency and register pressure. - ILP // Scheduling for ILP in low register pressure mode. - }; +// 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. +/// 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 + TargetMachine(const TargetMachine &) = delete; + void operator=(const TargetMachine &) = delete; protected: // Can only create subclasses. - TargetMachine(const Target &); + TargetMachine(const Target &T, StringRef DataLayoutString, + const Triple &TargetTriple, StringRef CPU, StringRef FS, + const TargetOptions &Options); - /// getSubtargetImpl - virtual method implemented by subclasses that returns - /// a reference to that target's TargetSubtarget-derived member variable. - virtual const TargetSubtarget *getSubtargetImpl() const { return 0; } - - /// TheTarget - The Target that this machine was created for. + /// The Target that this machine was created for. const Target &TheTarget; - /// AsmInfo - Contains target specific asm information. - /// + /// For ABI type size and alignment. + const DataLayout DL; + + /// Triple string, CPU name, and target feature strings the TargetMachine + /// instance is created with. + Triple TargetTriple; + std::string TargetCPU; + std::string TargetFS; + + /// Low level target information such as relocation model. Non-const to + /// allow resetting optimization level per-function. + MCCodeGenInfo *CodeGenInfo; + + /// Contains target specific asm information. const MCAsmInfo *AsmInfo; - unsigned MCRelaxAll : 1; - unsigned MCNoExecStack : 1; - unsigned MCSaveTempLabels : 1; - unsigned MCUseLoc : 1; + const MCRegisterInfo *MRI; + const MCInstrInfo *MII; + const MCSubtargetInfo *STI; + + unsigned RequireStructuredCFG : 1; public: + mutable TargetOptions Options; + virtual ~TargetMachine(); const Target &getTarget() const { return TheTarget; } - // 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; } + // FIXME: Either rename to getTargetName() or make it return a triple. + StringRef getTargetTriple() const { return TargetTriple.str(); } + StringRef getTargetCPU() const { return TargetCPU; } + StringRef getTargetFeatureString() const { return TargetFS; } - /// getSubtarget - This method returns a pointer to the specified type of - /// TargetSubtarget. In debug builds, it verifies that the object being - /// returned is of the correct type. - template const STC &getSubtarget() const { - return *static_cast(getSubtargetImpl()); + /// Virtual method implemented by subclasses that returns a reference to that + /// target's TargetSubtargetInfo-derived member variable. + virtual const TargetSubtargetInfo *getSubtargetImpl(const Function &) const { + return nullptr; + } + virtual TargetLoweringObjectFile *getObjFileLowering() const { + return nullptr; } - /// 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; + /// 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 const STC &getSubtarget(const Function &F) const { + return *static_cast(getSubtargetImpl(F)); } - /// getELFWriterInfo - If this target supports an ELF writer, return - /// information for it, otherwise return null. - /// - virtual const TargetELFWriterInfo *getELFWriterInfo() const { return 0; } + /// This method returns a pointer to the DataLayout for the target. It should + /// be unchanging for every subtarget. + const DataLayout *getDataLayout() const { return &DL; } - /// hasMCRelaxAll - Check whether all machine code instructions should be - /// relaxed. - bool hasMCRelaxAll() const { return MCRelaxAll; } + /// \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; - /// setMCRelaxAll - Set whether all machine code instructions should be - /// relaxed. - void setMCRelaxAll(bool Value) { MCRelaxAll = Value; } + /// Return target specific asm information. + const MCAsmInfo *getMCAsmInfo() const { return AsmInfo; } - /// hasMCSaveTempLabels - Check whether temporary labels will be preserved - /// (i.e., not treated as temporary). - bool hasMCSaveTempLabels() const { return MCSaveTempLabels; } + const MCRegisterInfo *getMCRegisterInfo() const { return MRI; } + const MCInstrInfo *getMCInstrInfo() const { return MII; } + const MCSubtargetInfo *getMCSubtargetInfo() const { return STI; } - /// setMCSaveTempLabels - Set whether temporary labels will be preserved - /// (i.e., not treated as temporary). - void setMCSaveTempLabels(bool Value) { MCSaveTempLabels = Value; } + /// If intrinsic information is available, return it. If not, return null. + virtual const TargetIntrinsicInfo *getIntrinsicInfo() const { + return nullptr; + } - /// hasMCNoExecStack - Check whether an executable stack is not needed. - bool hasMCNoExecStack() const { return MCNoExecStack; } + bool requiresStructuredCFG() const { return RequireStructuredCFG; } + void setRequiresStructuredCFG(bool Value) { RequireStructuredCFG = Value; } - /// setMCNoExecStack - Set whether an executabel stack is not needed. - void setMCNoExecStack(bool Value) { MCNoExecStack = Value; } + /// Returns the code generation relocation model. The choices are static, PIC, + /// and dynamic-no-pic, and target default. + Reloc::Model getRelocationModel() const; - /// hasMCUseLoc - Check whether we should use dwarf's .loc directive. - bool hasMCUseLoc() const { return MCUseLoc; } + /// Returns the code model. The choices are small, kernel, medium, large, and + /// target default. + CodeModel::Model getCodeModel() const; - /// setMCUseLoc - Set whether all we should use dwarf's .loc directive. - void setMCUseLoc(bool Value) { MCUseLoc = Value; } + /// Returns the TLS model which should be used for the given global variable. + TLSModel::Model getTLSModel(const GlobalValue *GV) const; - /// getRelocationModel - Returns the code generation relocation model. The - /// choices are static, PIC, and dynamic-no-pic, and target default. - static Reloc::Model getRelocationModel(); + /// Returns the optimization level: None, Less, Default, or Aggressive. + CodeGenOpt::Level getOptLevel() const; - /// setRelocationModel - Sets the code generation relocation model. - /// - static void setRelocationModel(Reloc::Model Model); + /// \brief Overrides the optimization level. + void setOptLevel(CodeGenOpt::Level Level) const; - /// getCodeModel - Returns the code model. The choices are small, kernel, - /// medium, large, and target default. - static CodeModel::Model getCodeModel(); + void setFastISel(bool Enable) { Options.EnableFastISel = Enable; } - /// setCodeModel - Sets the code model. - /// - static void setCodeModel(CodeModel::Model Model); + bool shouldPrintMachineCode() const { return Options.PrintMachineCode; } - /// getAsmVerbosityDefault - Returns the default value of asm verbosity. + /// 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(); + bool getAsmVerbosityDefault() const { + return Options.MCOptions.AsmVerbose; + } - /// getFunctionSections - Return true if functions should be emitted into - /// their own section, corresponding to -ffunction-sections. - static bool getFunctionSections(); + bool getUniqueSectionNames() const { return Options.UniqueSectionNames; } - /// setDataSections - Set if the data are emit into separate sections. - static void setDataSections(bool); + /// Return true if data objects should be emitted into their own section, + /// corresponds to -fdata-sections. + bool getDataSections() const { + return Options.DataSections; + } - /// setFunctionSections - Set if the functions are emit into separate - /// sections. - static void setFunctionSections(bool); + /// Return true if functions should be emitted into their own section, + /// corresponding to -ffunction-sections. + bool getFunctionSections() const { + return Options.FunctionSections; + } - /// 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. + /// \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(); + + /// 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. }; - /// getEnableTailMergeDefault - the default setting for -enable-tail-merge - /// on this target. User flag overrides. - virtual bool getEnableTailMergeDefault() const { return true; } - - /// 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, - CodeGenOpt::Level, - bool = true) { + /// 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 &, raw_pwrite_stream &, CodeGenFileType, + bool /*DisableVerify*/ = true, AnalysisID /*StartAfter*/ = nullptr, + AnalysisID /*StopAfter*/ = nullptr, + MachineFunctionInitializer * /*MFInitializer*/ = nullptr) { 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. + /// 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 addPassesToEmitMachineCode(PassManagerBase &, - JITCodeEmitter &, - CodeGenOpt::Level, - bool = true) { + virtual bool addPassesToEmitMC(PassManagerBase &, MCContext *&, + raw_pwrite_stream &, + 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 &, - CodeGenOpt::Level, - bool = true) { - return true; - } + void getNameWithPrefix(SmallVectorImpl &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. +/// This class describes a target machine that is implemented with the LLVM +/// target-independent code generator. /// class LLVMTargetMachine : public TargetMachine { - std::string TargetTriple; - protected: // Can only create subclasses. - LLVMTargetMachine(const Target &T, const std::string &TargetTriple); - -private: - /// addCommonCodeGenPasses - Add standard LLVM codegen passes used for - /// both emitting to assembly files or machine code output. - /// - bool addCommonCodeGenPasses(PassManagerBase &, CodeGenOpt::Level, - bool DisableVerify, MCContext *&OutCtx); - - virtual void setCodeModelForJIT(); - virtual void setCodeModelForStatic(); + LLVMTargetMachine(const Target &T, StringRef DataLayoutString, + const Triple &TargetTriple, StringRef CPU, StringRef FS, + TargetOptions Options, Reloc::Model RM, CodeModel::Model CM, + CodeGenOpt::Level OL); + void initAsmInfo(); public: - - const std::string &getTargetTriple() const { return TargetTriple; } - - /// addPassesToEmitFile - Add passes to the specified pass manager to get the - /// specified file emitted. Typically this will involve several steps of code - /// generation. If OptLevel is None, the code generator should emit code as - /// fast as possible, though the generated code may be less efficient. - virtual bool addPassesToEmitFile(PassManagerBase &PM, - formatted_raw_ostream &Out, - CodeGenFileType FileType, - CodeGenOpt::Level, - 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. + /// \brief Get a TargetIRAnalysis implementation for the target. /// - virtual bool addPassesToEmitMachineCode(PassManagerBase &PM, - JITCodeEmitter &MCE, - CodeGenOpt::Level, - 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, - CodeGenOpt::Level OptLevel, - bool DisableVerify = true); - - /// Target-Independent Code Generator Pass Configuration Options. - - /// addPreISelPasses - This method should add any "last minute" LLVM->LLVM - /// passes (which are run just before instruction selector). - virtual bool addPreISel(PassManagerBase &, CodeGenOpt::Level) { - return true; - } - - /// addInstSelector - This method should install an instruction selector pass, - /// which converts from LLVM code to machine instructions. - virtual bool addInstSelector(PassManagerBase &, CodeGenOpt::Level) { - return true; - } - - /// addPreRegAlloc - This method may be implemented by targets that want to - /// run passes immediately before register allocation. This should return - /// true if -print-machineinstrs should print after these passes. - virtual bool addPreRegAlloc(PassManagerBase &, CodeGenOpt::Level) { - return false; - } - - /// addPostRegAlloc - This method may be implemented by targets that want - /// to run passes after register allocation but before prolog-epilog - /// insertion. This should return true if -print-machineinstrs should print - /// after these passes. - virtual bool addPostRegAlloc(PassManagerBase &, CodeGenOpt::Level) { - return false; - } - - /// addPreSched2 - This method may be implemented by targets that want to - /// run passes after prolog-epilog insertion and before the second instruction - /// scheduling pass. This should return true if -print-machineinstrs should - /// print after these passes. - virtual bool addPreSched2(PassManagerBase &, CodeGenOpt::Level) { - return false; - } - - /// addPreEmitPass - This pass may be implemented by targets that want to run - /// passes immediately before machine code is emitted. This should return - /// true if -print-machineinstrs should print out the code after the passes. - virtual bool addPreEmitPass(PassManagerBase &, CodeGenOpt::Level) { - return false; - } - - - /// 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 &, CodeGenOpt::Level, - JITCodeEmitter &) { - return true; - } - - /// getEnableTailMergeDefault - the default setting for -enable-tail-merge - /// on this target. User flag overrides. - virtual bool getEnableTailMergeDefault() const { return true; } + /// This analysis will produce a TTI result which uses the common code + /// generator to answer queries about the IR. + TargetIRAnalysis getTargetIRAnalysis() override; + + /// Create a pass configuration object to be used by addPassToEmitX methods + /// for generating a pipeline of CodeGen passes. + virtual TargetPassConfig *createPassConfig(PassManagerBase &PM); + + /// 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, raw_pwrite_stream &Out, CodeGenFileType FileType, + bool DisableVerify = true, AnalysisID StartAfter = nullptr, + AnalysisID StopAfter = nullptr, + MachineFunctionInitializer *MFInitializer = nullptr) override; + + /// 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_pwrite_stream &OS, + bool DisableVerify = true) override; }; } // End llvm namespace