//===-- llvm/Target/TargetMachine.h - Target Information --------*- C++ -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
//
-// 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/ADT/StringRef.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/CodeGen.h"
+#include "llvm/Target/TargetOptions.h"
#include <cassert>
+#include <string>
namespace llvm {
-class TargetInstrInfo;
-class TargetInstrDescriptor;
-class TargetJITInfo;
-class TargetSchedInfo;
-class SparcV9RegInfo;
-class TargetFrameInfo;
-class MachineCodeEmitter;
-class MRegisterInfo;
-class FunctionPassManager;
-class PassManager;
-class Pass;
-class IntrinsicLowering;
+class InstrItineraryData;
+class GlobalValue;
+class Mangler;
+class MCAsmInfo;
+class MCCodeGenInfo;
+class MCContext;
+class MCSymbol;
+class Target;
+class DataLayout;
+class TargetLibraryInfo;
+class TargetFrameLowering;
+class TargetIntrinsicInfo;
+class TargetLowering;
+class TargetPassConfig;
+class TargetRegisterInfo;
+class TargetSelectionDAGInfo;
+class TargetSubtargetInfo;
+class ScalarTargetTransformInfo;
+class VectorTargetTransformInfo;
+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 {
- const std::string Name;
- const TargetData DataLayout; // Calculates type size & alignment
- IntrinsicLowering *IL; // Specifies how to lower intrinsic calls
-
- TargetMachine(const TargetMachine&); // DO NOT IMPLEMENT
- void operator=(const TargetMachine&); // DO NOT IMPLEMENT
-protected: // Can only create subclasses...
- TargetMachine(const std::string &name, IntrinsicLowering *IL,
- bool LittleEndian = false,
- unsigned char PtrSize = 8, unsigned char PtrAl = 8,
- unsigned char DoubleAl = 8, unsigned char FloatAl = 4,
- unsigned char LongAl = 8, unsigned char IntAl = 4,
- unsigned char ShortAl = 2, unsigned char ByteAl = 1,
- unsigned char BoolAl = 1);
-
- TargetMachine(const std::string &name, IntrinsicLowering *IL,
- const TargetData &TD);
-
- /// 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 TargetMachine &) LLVM_DELETED_FUNCTION;
+ void operator=(const TargetMachine &) LLVM_DELETED_FUNCTION;
+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.
///
- TargetMachine(const std::string &name, IntrinsicLowering *IL,
- const Module &M);
+ const MCAsmInfo *AsmInfo;
+
+ unsigned RequireStructuredCFG : 1;
+
public:
+ mutable TargetOptions Options;
+
virtual ~TargetMachine();
- /// getModuleMatchQuality - This static method should be implemented by
- /// targets to indicate how closely they match the specified module. This is
- /// used by the LLC tool to determine which target to use when an explicit
- /// -march option is not specified. If a target returns zero, it will never
- /// be chosen without an explicit -march option.
- static unsigned getModuleMatchQuality(const Module &M) { return 0; }
+ const Target &getTarget() const { return TheTarget; }
+
+ StringRef getTargetTriple() const { return TargetTriple; }
+ StringRef getTargetCPU() const { return TargetCPU; }
+ StringRef getTargetFeatureString() const { return TargetFS; }
- /// getJITMatchQuality - This static method should be implemented by targets
- /// that provide JIT capabilities to indicate how suitable they are for
- /// execution on the current host. If a value of 0 is returned, the target
- /// will not be used unless an explicit -march option is used.
- static unsigned getJITMatchQuality() { return 0; }
+ /// 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;
+ }
- const std::string &getName() const { return Name; }
+ /// \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;
- /// getIntrinsicLowering - This method returns a reference to an
- /// IntrinsicLowering instance which should be used by the code generator to
- /// lower unknown intrinsic functions to the equivalent LLVM expansion.
- ///
- IntrinsicLowering &getIntrinsicLowering() const { return *IL; }
-
- // Interfaces to the major aspects of target machine information:
- // -- Instruction opcode and operand information
- // -- Pipelines and scheduling information
- // -- Stack frame information
- //
- virtual const TargetInstrInfo *getInstrInfo() const { return 0; }
- virtual const TargetFrameInfo *getFrameInfo() const { return 0; }
- const TargetData &getTargetData() const { return DataLayout; }
-
- /// 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.
+ /// getMCAsmInfo - Return target specific asm information.
///
- virtual const MRegisterInfo* getRegisterInfo() const { return 0; }
+ const MCAsmInfo *getMCAsmInfo() const { return AsmInfo; }
- /// getJITInfo - If this target supports a JIT, return information for it,
- /// otherwise return null.
+ /// getIntrinsicInfo - If intrinsic information is available, return it. If
+ /// not, return null.
///
- virtual TargetJITInfo *getJITInfo() { return 0; }
+ 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;
- // These are deprecated interfaces.
- virtual const TargetSchedInfo *getSchedInfo() const { return 0; }
- virtual const SparcV9RegInfo *getRegInfo() const { return 0; }
+ /// getTLSModel - Returns the TLS model which should be used for the given
+ /// global variable.
+ TLSModel::Model getTLSModel(const GlobalValue *GV) const;
- /// addPassesToEmitAssembly - Add passes to the specified pass manager to get
- /// assembly langage code emitted. Typically this will involve several steps
- /// of code generation. This method should return true if assembly emission
- /// is not supported.
+ /// 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; }
+
+ /// getAsmVerbosityDefault - Returns the default value of asm verbosity.
///
- virtual bool addPassesToEmitAssembly(PassManager &PM, std::ostream &Out) {
+ bool getAsmVerbosityDefault() const ;
+
+ /// setAsmVerbosityDefault - Set the default value of asm verbosity. Default
+ /// is false.
+ void setAsmVerbosityDefault(bool);
+
+ /// getDataSections - Return true if data objects should be emitted into their
+ /// own section, corresponds to -fdata-sections.
+ bool getDataSections() const;
+
+ /// getFunctionSections - Return true if functions should be emitted into
+ /// their own section, corresponding to -ffunction-sections.
+ bool getFunctionSections() const;
+
+ /// setDataSections - Set if the data are emit into separate sections.
+ void setDataSections(bool);
+
+ /// setFunctionSections - Set if the functions are emit into separate
+ /// sections.
+ void setFunctionSections(bool);
+
+ /// \brief Register analysis passes for this target with a pass manager.
+ virtual void addAnalysisPasses(PassManagerBase &) {}
+
+ /// 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;
}
- /// 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
- /// not supported.
+ /// 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 addPassesToEmitMachineCode(FunctionPassManager &PM,
- MachineCodeEmitter &MCE) {
+ 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 Register analysis passes for this target with a pass manager.
+ ///
+ /// This registers target independent analysis passes.
+ void addAnalysisPasses(PassManagerBase &PM) 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
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