X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FTarget%2FTargetMachine.h;h=e5fceba522be8fee3fcd1ecdab265b91880c1238;hb=c651e4c51e11feb58e6c12fee8a8f85631269f2f;hp=31f5f3c91396952e3807f730a15097d6de7c90f7;hpb=a69571c7991813c93cba64e88eced6899ce93d81;p=oota-llvm.git diff --git a/include/llvm/Target/TargetMachine.h b/include/llvm/Target/TargetMachine.h index 31f5f3c9139..e5fceba522b 100644 --- a/include/llvm/Target/TargetMachine.h +++ b/include/llvm/Target/TargetMachine.h @@ -7,19 +7,21 @@ // //===----------------------------------------------------------------------===// // -// This file describes the general parts of a Target machine. +// This file defines the TargetMachine and LLVMTargetMachine classes. // //===----------------------------------------------------------------------===// #ifndef LLVM_TARGET_TARGETMACHINE_H #define LLVM_TARGET_TARGETMACHINE_H -#include "llvm/Target/TargetData.h" #include "llvm/Target/TargetInstrItineraries.h" #include +#include namespace llvm { +class TargetAsmInfo; +class TargetData; class TargetSubtarget; class TargetInstrInfo; class TargetInstrDescriptor; @@ -28,20 +30,44 @@ class TargetLowering; class TargetFrameInfo; class MachineCodeEmitter; class MRegisterInfo; +class Module; class FunctionPassManager; class PassManager; class Pass; +class TargetMachOWriterInfo; +class TargetELFWriterInfo; // Relocation model types. namespace Reloc { enum Model { Default, Static, - PIC, + PIC_, // Cannot be named PIC due to collision with -DPIC DynamicNoPIC }; } +// Code model types. +namespace CodeModel { + enum Model { + Default, + Small, + Kernel, + Medium, + Large + }; +} + +namespace FileModel { + enum Model { + Error, + None, + AsmFile, + MachOFile, + ElfFile + }; +} + //===----------------------------------------------------------------------===// /// /// TargetMachine - Primary interface to the complete machine description for @@ -49,22 +75,23 @@ namespace Reloc { /// through this interface. /// class TargetMachine { - const std::string Name; - - TargetMachine(const TargetMachine&); // DO NOT IMPLEMENT - void operator=(const TargetMachine&); // DO NOT IMPLEMENT -protected: // Can only create subclasses... - TargetMachine(const std::string &name) : Name(name) { }; - - /// This constructor is used for targets that support arbitrary TargetData - /// layouts, like the C backend. It initializes the TargetData to match that - /// of the specified module. - /// - TargetMachine(const std::string &name, const Module &M); + TargetMachine(const TargetMachine &); // DO NOT IMPLEMENT + void operator=(const TargetMachine &); // DO NOT IMPLEMENT +protected: // Can only create subclasses. + TargetMachine() : AsmInfo(NULL) { } /// 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; } + + /// AsmInfo - Contains target specific asm information. + /// + mutable const TargetAsmInfo *AsmInfo; + + /// createTargetAsmInfo - Create a new instance of target specific asm + /// information. + virtual const TargetAsmInfo *createTargetAsmInfo() const { return NULL; } + public: virtual ~TargetMachine(); @@ -81,9 +108,6 @@ public: /// will not be used unless an explicit -march option is used. static unsigned getJITMatchQuality() { return 0; } - - const std::string &getName() const { return Name; } - // Interfaces to the major aspects of target machine information: // -- Instruction opcode and operand information // -- Pipelines and scheduling information @@ -94,7 +118,15 @@ public: virtual const TargetFrameInfo *getFrameInfo() const { return 0; } virtual TargetLowering *getTargetLowering() const { return 0; } virtual const TargetData *getTargetData() const { return 0; } - + + + /// getTargetAsmInfo - Return target specific asm information. + /// + const TargetAsmInfo *getTargetAsmInfo() const { + if (!AsmInfo) AsmInfo = createTargetAsmInfo(); + return AsmInfo; + } + /// 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. @@ -109,7 +141,7 @@ public: /// not, return null. This is kept separate from RegInfo until RegInfo has /// details of graph coloring register allocation removed from it. /// - virtual const MRegisterInfo* getRegisterInfo() const { return 0; } + virtual const MRegisterInfo *getRegisterInfo() const { return 0; } /// getJITInfo - If this target supports a JIT, return information for it, /// otherwise return null. @@ -123,6 +155,16 @@ public: return InstrItineraryData(); } + /// getMachOWriterInfo - If this target supports a Mach-O writer, return + /// information for it, otherwise return null. + /// + virtual const TargetMachOWriterInfo *getMachOWriterInfo() 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; } + /// getRelocationModel - Returns the code generation relocation model. The /// choices are static, PIC, and dynamic-no-pic, and target default. static Reloc::Model getRelocationModel(); @@ -130,31 +172,147 @@ public: /// setRelocationModel - Sets the code generation relocation model. static void setRelocationModel(Reloc::Model Model); + /// getCodeModel - Returns the code model. The choices are small, kernel, + /// medium, large, and target default. + static CodeModel::Model getCodeModel(); + + /// setCodeModel - Sets the code model. + static void setCodeModel(CodeModel::Model Model); + /// CodeGenFileType - These enums are meant to be passed into /// addPassesToEmitFile to indicate what type of file to emit. enum CodeGenFileType { AssemblyFile, ObjectFile, DynamicLibrary }; - /// addPassesToEmitFile - Add passes to the specified pass manager to get - /// the specified file emitted. Typically this will involve several steps of - /// code generation. If Fast is set to true, the code generator should emit - /// code as fast as possible, without regard for compile time. This method - /// should return true if emission of this file type is not supported. + /// addPassesToEmitFile - Add passes to the specified pass manager to get the + /// specified file emitted. Typically this will involve several steps of code + /// generation. If Fast is set to true, the code generator should emit code + /// as fast as possible, without regard for compile time. This method should + /// return FileModel::Error if emission of this file type is not supported. + /// + virtual FileModel::Model addPassesToEmitFile(FunctionPassManager &PM, + std::ostream &Out, + CodeGenFileType FileType, + bool Fast) { + return FileModel::None; + } + + /// addPassesToEmitFileFinish - If the passes to emit the specified file had + /// to be split up (e.g., to add an object writer pass), this method can be + /// used to finish up adding passes to emit the file, if necessary. + /// + virtual bool addPassesToEmitFileFinish(FunctionPassManager &PM, + MachineCodeEmitter *MCE, bool Fast) { + return true; + } + + /// addPassesToEmitMachineCode - Add passes to the specified pass manager to + /// get machine code emitted. This uses a MachineCodeEmitter 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 addPassesToEmitFile(PassManager &PM, std::ostream &Out, - CodeGenFileType FileType, bool Fast) { + virtual bool addPassesToEmitMachineCode(FunctionPassManager &PM, + MachineCodeEmitter &MCE, bool Fast) { return true; } + /// addPassesToEmitWholeFile - This method can be implemented by targets that + /// require having the entire module at once. This is not recommended, do not + /// use this. + virtual bool WantsWholeFile() const { return false; } + virtual bool addPassesToEmitWholeFile(PassManager &PM, std::ostream &Out, + CodeGenFileType FileType, bool Fast) { + 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() { } +public: + + /// addPassesToEmitFile - Add passes to the specified pass manager to get the + /// specified file emitted. Typically this will involve several steps of code + /// generation. If Fast is set to true, the code generator should emit code + /// as fast as possible, without regard for compile time. This method should + /// return FileModel::Error if emission of this file type is not supported. + /// + /// The default implementation of this method adds components from the + /// LLVM retargetable code generator, invoking the methods below to get + /// target-specific passes in standard locations. + /// + virtual FileModel::Model addPassesToEmitFile(FunctionPassManager &PM, + std::ostream &Out, + CodeGenFileType FileType, + bool Fast); + + /// addPassesToEmitFileFinish - If the passes to emit the specified file had + /// to be split up (e.g., to add an object writer pass), this method can be + /// used to finish up adding passes to emit the file, if necessary. + /// + virtual bool addPassesToEmitFileFinish(FunctionPassManager &PM, + MachineCodeEmitter *MCE, bool Fast); + /// addPassesToEmitMachineCode - Add passes to the specified pass manager to /// get machine code emitted. This uses a MachineCodeEmitter object to handle /// actually outputting the machine code and resolving things like the address - /// of functions. This method should returns true if machine code emission is + /// of functions. This method returns true if machine code emission is /// not supported. /// virtual bool addPassesToEmitMachineCode(FunctionPassManager &PM, - MachineCodeEmitter &MCE) { + MachineCodeEmitter &MCE, bool Fast); + + /// Target-Independent Code Generator Pass Configuration Options. + + /// addInstSelector - This method should add any "last minute" LLVM->LLVM + /// passes, then install an instruction selector pass, which converts from + /// LLVM code to machine instructions. + virtual bool addInstSelector(FunctionPassManager &PM, bool Fast) { + return true; + } + + /// addPostRegAllocPasses - 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(FunctionPassManager &PM, bool Fast) { + 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(FunctionPassManager &PM, bool Fast) { + return false; + } + + + /// addAssemblyEmitter - This pass should be overridden by the target to add + /// the asmprinter, if asm emission is supported. If this is not supported, + /// 'true' should be returned. + virtual bool addAssemblyEmitter(FunctionPassManager &PM, bool Fast, + std::ostream &Out) { + return 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(FunctionPassManager &PM, bool Fast, + MachineCodeEmitter &MCE) { + return true; + } + + /// addSimpleCodeEmitter - This pass should be overridden by the target to add + /// a code emitter (without setting flags), if supported. If this is not + /// supported, 'true' should be returned. + virtual bool addSimpleCodeEmitter(FunctionPassManager &PM, bool Fast, + MachineCodeEmitter &MCE) { return true; } };