freebsd-dev/include/llvm/Target/TargetRegistry.h
2009-11-18 14:58:34 +00:00

570 lines
20 KiB
C++

//===-- Target/TargetRegistry.h - Target Registration -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file exposes the TargetRegistry interface, which tools can use to access
// the appropriate target specific classes (TargetMachine, AsmPrinter, etc.)
// which have been registered.
//
// Target specific class implementations should register themselves using the
// appropriate TargetRegistry interfaces.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_TARGETREGISTRY_H
#define LLVM_TARGET_TARGETREGISTRY_H
#include "llvm/ADT/Triple.h"
#include <string>
#include <cassert>
namespace llvm {
class AsmPrinter;
class MCAsmParser;
class MCCodeEmitter;
class Module;
class MCAsmInfo;
class MCDisassembler;
class MCInstPrinter;
class TargetAsmParser;
class TargetMachine;
class formatted_raw_ostream;
class raw_ostream;
/// Target - Wrapper for Target specific information.
///
/// For registration purposes, this is a POD type so that targets can be
/// registered without the use of static constructors.
///
/// Targets should implement a single global instance of this class (which
/// will be zero initialized), and pass that instance to the TargetRegistry as
/// part of their initialization.
class Target {
public:
friend struct TargetRegistry;
typedef unsigned (*TripleMatchQualityFnTy)(const std::string &TT);
typedef const MCAsmInfo *(*AsmInfoCtorFnTy)(const Target &T,
StringRef TT);
typedef TargetMachine *(*TargetMachineCtorTy)(const Target &T,
const std::string &TT,
const std::string &Features);
typedef AsmPrinter *(*AsmPrinterCtorTy)(formatted_raw_ostream &OS,
TargetMachine &TM,
const MCAsmInfo *MAI,
bool VerboseAsm);
typedef TargetAsmParser *(*AsmParserCtorTy)(const Target &T,
MCAsmParser &P);
typedef const MCDisassembler *(*MCDisassemblerCtorTy)(const Target &T);
typedef MCInstPrinter *(*MCInstPrinterCtorTy)(const Target &T,
unsigned SyntaxVariant,
const MCAsmInfo &MAI,
raw_ostream &O);
typedef MCCodeEmitter *(*CodeEmitterCtorTy)(const Target &T,
TargetMachine &TM);
private:
/// Next - The next registered target in the linked list, maintained by the
/// TargetRegistry.
Target *Next;
/// TripleMatchQualityFn - The target function for rating the match quality
/// of a triple.
TripleMatchQualityFnTy TripleMatchQualityFn;
/// Name - The target name.
const char *Name;
/// ShortDesc - A short description of the target.
const char *ShortDesc;
/// HasJIT - Whether this target supports the JIT.
bool HasJIT;
AsmInfoCtorFnTy AsmInfoCtorFn;
/// TargetMachineCtorFn - Construction function for this target's
/// TargetMachine, if registered.
TargetMachineCtorTy TargetMachineCtorFn;
/// AsmPrinterCtorFn - Construction function for this target's AsmPrinter,
/// if registered.
AsmPrinterCtorTy AsmPrinterCtorFn;
/// AsmParserCtorFn - Construction function for this target's AsmParser,
/// if registered.
AsmParserCtorTy AsmParserCtorFn;
/// MCDisassemblerCtorFn - Construction function for this target's
/// MCDisassembler, if registered.
MCDisassemblerCtorTy MCDisassemblerCtorFn;
/// MCInstPrinterCtorFn - Construction function for this target's
/// MCInstPrinter, if registered.
MCInstPrinterCtorTy MCInstPrinterCtorFn;
/// CodeEmitterCtorFn - Construction function for this target's CodeEmitter,
/// if registered.
CodeEmitterCtorTy CodeEmitterCtorFn;
public:
/// @name Target Information
/// @{
// getNext - Return the next registered target.
const Target *getNext() const { return Next; }
/// getName - Get the target name.
const char *getName() const { return Name; }
/// getShortDescription - Get a short description of the target.
const char *getShortDescription() const { return ShortDesc; }
/// @}
/// @name Feature Predicates
/// @{
/// hasJIT - Check if this targets supports the just-in-time compilation.
bool hasJIT() const { return HasJIT; }
/// hasTargetMachine - Check if this target supports code generation.
bool hasTargetMachine() const { return TargetMachineCtorFn != 0; }
/// hasAsmPrinter - Check if this target supports .s printing.
bool hasAsmPrinter() const { return AsmPrinterCtorFn != 0; }
/// hasAsmParser - Check if this target supports .s parsing.
bool hasAsmParser() const { return AsmParserCtorFn != 0; }
/// hasMCDisassembler - Check if this target has a disassembler.
bool hasMCDisassembler() const { return MCDisassemblerCtorFn != 0; }
/// hasMCInstPrinter - Check if this target has an instruction printer.
bool hasMCInstPrinter() const { return MCInstPrinterCtorFn != 0; }
/// hasCodeEmitter - Check if this target supports instruction encoding.
bool hasCodeEmitter() const { return CodeEmitterCtorFn != 0; }
/// @}
/// @name Feature Constructors
/// @{
/// createAsmInfo - Create a MCAsmInfo implementation for the specified
/// target triple.
///
/// \arg Triple - This argument is used to determine the target machine
/// feature set; it should always be provided. Generally this should be
/// either the target triple from the module, or the target triple of the
/// host if that does not exist.
const MCAsmInfo *createAsmInfo(StringRef Triple) const {
if (!AsmInfoCtorFn)
return 0;
return AsmInfoCtorFn(*this, Triple);
}
/// createTargetMachine - Create a target specific machine implementation
/// for the specified \arg Triple.
///
/// \arg Triple - This argument is used to determine the target machine
/// feature set; it should always be provided. Generally this should be
/// either the target triple from the module, or the target triple of the
/// host if that does not exist.
TargetMachine *createTargetMachine(const std::string &Triple,
const std::string &Features) const {
if (!TargetMachineCtorFn)
return 0;
return TargetMachineCtorFn(*this, Triple, Features);
}
/// createAsmPrinter - Create a target specific assembly printer pass.
AsmPrinter *createAsmPrinter(formatted_raw_ostream &OS, TargetMachine &TM,
const MCAsmInfo *MAI, bool Verbose) const {
if (!AsmPrinterCtorFn)
return 0;
return AsmPrinterCtorFn(OS, TM, MAI, Verbose);
}
/// createAsmParser - Create a target specific assembly parser.
///
/// \arg Parser - The target independent parser implementation to use for
/// parsing and lexing.
TargetAsmParser *createAsmParser(MCAsmParser &Parser) const {
if (!AsmParserCtorFn)
return 0;
return AsmParserCtorFn(*this, Parser);
}
const MCDisassembler *createMCDisassembler() const {
if (!MCDisassemblerCtorFn)
return 0;
return MCDisassemblerCtorFn(*this);
}
MCInstPrinter *createMCInstPrinter(unsigned SyntaxVariant,
const MCAsmInfo &MAI,
raw_ostream &O) const {
if (!MCInstPrinterCtorFn)
return 0;
return MCInstPrinterCtorFn(*this, SyntaxVariant, MAI, O);
}
/// createCodeEmitter - Create a target specific code emitter.
MCCodeEmitter *createCodeEmitter(TargetMachine &TM) const {
if (!CodeEmitterCtorFn)
return 0;
return CodeEmitterCtorFn(*this, TM);
}
/// @}
};
/// TargetRegistry - Generic interface to target specific features.
struct TargetRegistry {
class iterator {
const Target *Current;
explicit iterator(Target *T) : Current(T) {}
friend struct TargetRegistry;
public:
iterator(const iterator &I) : Current(I.Current) {}
iterator() : Current(0) {}
bool operator==(const iterator &x) const {
return Current == x.Current;
}
bool operator!=(const iterator &x) const {
return !operator==(x);
}
// Iterator traversal: forward iteration only
iterator &operator++() { // Preincrement
assert(Current && "Cannot increment end iterator!");
Current = Current->getNext();
return *this;
}
iterator operator++(int) { // Postincrement
iterator tmp = *this;
++*this;
return tmp;
}
const Target &operator*() const {
assert(Current && "Cannot dereference end iterator!");
return *Current;
}
const Target *operator->() const {
return &operator*();
}
};
/// @name Registry Access
/// @{
static iterator begin();
static iterator end() { return iterator(); }
/// lookupTarget - Lookup a target based on a target triple.
///
/// \param Triple - The triple to use for finding a target.
/// \param Error - On failure, an error string describing why no target was
/// found.
static const Target *lookupTarget(const std::string &Triple,
std::string &Error);
/// getClosestTargetForJIT - Pick the best target that is compatible with
/// the current host. If no close target can be found, this returns null
/// and sets the Error string to a reason.
///
/// Maintained for compatibility through 2.6.
static const Target *getClosestTargetForJIT(std::string &Error);
/// @}
/// @name Target Registration
/// @{
/// RegisterTarget - Register the given target. Attempts to register a
/// target which has already been registered will be ignored.
///
/// Clients are responsible for ensuring that registration doesn't occur
/// while another thread is attempting to access the registry. Typically
/// this is done by initializing all targets at program startup.
///
/// @param T - The target being registered.
/// @param Name - The target name. This should be a static string.
/// @param ShortDesc - A short target description. This should be a static
/// string.
/// @param TQualityFn - The triple match quality computation function for
/// this target.
/// @param HasJIT - Whether the target supports JIT code
/// generation.
static void RegisterTarget(Target &T,
const char *Name,
const char *ShortDesc,
Target::TripleMatchQualityFnTy TQualityFn,
bool HasJIT = false);
/// RegisterAsmInfo - Register a MCAsmInfo implementation for the
/// given target.
///
/// Clients are responsible for ensuring that registration doesn't occur
/// while another thread is attempting to access the registry. Typically
/// this is done by initializing all targets at program startup.
///
/// @param T - The target being registered.
/// @param Fn - A function to construct a MCAsmInfo for the target.
static void RegisterAsmInfo(Target &T, Target::AsmInfoCtorFnTy Fn) {
// Ignore duplicate registration.
if (!T.AsmInfoCtorFn)
T.AsmInfoCtorFn = Fn;
}
/// RegisterTargetMachine - Register a TargetMachine implementation for the
/// given target.
///
/// Clients are responsible for ensuring that registration doesn't occur
/// while another thread is attempting to access the registry. Typically
/// this is done by initializing all targets at program startup.
///
/// @param T - The target being registered.
/// @param Fn - A function to construct a TargetMachine for the target.
static void RegisterTargetMachine(Target &T,
Target::TargetMachineCtorTy Fn) {
// Ignore duplicate registration.
if (!T.TargetMachineCtorFn)
T.TargetMachineCtorFn = Fn;
}
/// RegisterAsmPrinter - Register an AsmPrinter implementation for the given
/// target.
///
/// Clients are responsible for ensuring that registration doesn't occur
/// while another thread is attempting to access the registry. Typically
/// this is done by initializing all targets at program startup.
///
/// @param T - The target being registered.
/// @param Fn - A function to construct an AsmPrinter for the target.
static void RegisterAsmPrinter(Target &T, Target::AsmPrinterCtorTy Fn) {
// Ignore duplicate registration.
if (!T.AsmPrinterCtorFn)
T.AsmPrinterCtorFn = Fn;
}
/// RegisterAsmParser - Register a TargetAsmParser implementation for the
/// given target.
///
/// Clients are responsible for ensuring that registration doesn't occur
/// while another thread is attempting to access the registry. Typically
/// this is done by initializing all targets at program startup.
///
/// @param T - The target being registered.
/// @param Fn - A function to construct an AsmPrinter for the target.
static void RegisterAsmParser(Target &T, Target::AsmParserCtorTy Fn) {
if (!T.AsmParserCtorFn)
T.AsmParserCtorFn = Fn;
}
/// RegisterMCDisassembler - Register a MCDisassembler implementation for
/// the given target.
///
/// Clients are responsible for ensuring that registration doesn't occur
/// while another thread is attempting to access the registry. Typically
/// this is done by initializing all targets at program startup.
///
/// @param T - The target being registered.
/// @param Fn - A function to construct an MCDisassembler for the target.
static void RegisterMCDisassembler(Target &T,
Target::MCDisassemblerCtorTy Fn) {
if (!T.MCDisassemblerCtorFn)
T.MCDisassemblerCtorFn = Fn;
}
/// RegisterMCInstPrinter - Register a MCInstPrinter implementation for the
/// given target.
///
/// Clients are responsible for ensuring that registration doesn't occur
/// while another thread is attempting to access the registry. Typically
/// this is done by initializing all targets at program startup.
///
/// @param T - The target being registered.
/// @param Fn - A function to construct an MCInstPrinter for the target.
static void RegisterMCInstPrinter(Target &T,
Target::MCInstPrinterCtorTy Fn) {
if (!T.MCInstPrinterCtorFn)
T.MCInstPrinterCtorFn = Fn;
}
/// RegisterCodeEmitter - Register a MCCodeEmitter implementation for the
/// given target.
///
/// Clients are responsible for ensuring that registration doesn't occur
/// while another thread is attempting to access the registry. Typically
/// this is done by initializing all targets at program startup.
///
/// @param T - The target being registered.
/// @param Fn - A function to construct an AsmPrinter for the target.
static void RegisterCodeEmitter(Target &T, Target::CodeEmitterCtorTy Fn) {
if (!T.CodeEmitterCtorFn)
T.CodeEmitterCtorFn = Fn;
}
/// @}
};
//===--------------------------------------------------------------------===//
/// RegisterTarget - Helper template for registering a target, for use in the
/// target's initialization function. Usage:
///
///
/// Target TheFooTarget; // The global target instance.
///
/// extern "C" void LLVMInitializeFooTargetInfo() {
/// RegisterTarget<Triple::foo> X(TheFooTarget, "foo", "Foo description");
/// }
template<Triple::ArchType TargetArchType = Triple::InvalidArch,
bool HasJIT = false>
struct RegisterTarget {
RegisterTarget(Target &T, const char *Name, const char *Desc) {
TargetRegistry::RegisterTarget(T, Name, Desc,
&getTripleMatchQuality,
HasJIT);
}
static unsigned getTripleMatchQuality(const std::string &TT) {
if (Triple(TT).getArch() == TargetArchType)
return 20;
return 0;
}
};
/// RegisterAsmInfo - Helper template for registering a target assembly info
/// implementation. This invokes the static "Create" method on the class to
/// actually do the construction. Usage:
///
/// extern "C" void LLVMInitializeFooTarget() {
/// extern Target TheFooTarget;
/// RegisterAsmInfo<FooMCAsmInfo> X(TheFooTarget);
/// }
template<class MCAsmInfoImpl>
struct RegisterAsmInfo {
RegisterAsmInfo(Target &T) {
TargetRegistry::RegisterAsmInfo(T, &Allocator);
}
private:
static const MCAsmInfo *Allocator(const Target &T, StringRef TT) {
return new MCAsmInfoImpl(T, TT);
}
};
/// RegisterAsmInfoFn - Helper template for registering a target assembly info
/// implementation. This invokes the specified function to do the
/// construction. Usage:
///
/// extern "C" void LLVMInitializeFooTarget() {
/// extern Target TheFooTarget;
/// RegisterAsmInfoFn X(TheFooTarget, TheFunction);
/// }
struct RegisterAsmInfoFn {
RegisterAsmInfoFn(Target &T, Target::AsmInfoCtorFnTy Fn) {
TargetRegistry::RegisterAsmInfo(T, Fn);
}
};
/// RegisterTargetMachine - Helper template for registering a target machine
/// implementation, for use in the target machine initialization
/// function. Usage:
///
/// extern "C" void LLVMInitializeFooTarget() {
/// extern Target TheFooTarget;
/// RegisterTargetMachine<FooTargetMachine> X(TheFooTarget);
/// }
template<class TargetMachineImpl>
struct RegisterTargetMachine {
RegisterTargetMachine(Target &T) {
TargetRegistry::RegisterTargetMachine(T, &Allocator);
}
private:
static TargetMachine *Allocator(const Target &T, const std::string &TT,
const std::string &FS) {
return new TargetMachineImpl(T, TT, FS);
}
};
/// RegisterAsmPrinter - Helper template for registering a target specific
/// assembly printer, for use in the target machine initialization
/// function. Usage:
///
/// extern "C" void LLVMInitializeFooAsmPrinter() {
/// extern Target TheFooTarget;
/// RegisterAsmPrinter<FooAsmPrinter> X(TheFooTarget);
/// }
template<class AsmPrinterImpl>
struct RegisterAsmPrinter {
RegisterAsmPrinter(Target &T) {
TargetRegistry::RegisterAsmPrinter(T, &Allocator);
}
private:
static AsmPrinter *Allocator(formatted_raw_ostream &OS, TargetMachine &TM,
const MCAsmInfo *MAI, bool Verbose) {
return new AsmPrinterImpl(OS, TM, MAI, Verbose);
}
};
/// RegisterAsmParser - Helper template for registering a target specific
/// assembly parser, for use in the target machine initialization
/// function. Usage:
///
/// extern "C" void LLVMInitializeFooAsmParser() {
/// extern Target TheFooTarget;
/// RegisterAsmParser<FooAsmParser> X(TheFooTarget);
/// }
template<class AsmParserImpl>
struct RegisterAsmParser {
RegisterAsmParser(Target &T) {
TargetRegistry::RegisterAsmParser(T, &Allocator);
}
private:
static TargetAsmParser *Allocator(const Target &T, MCAsmParser &P) {
return new AsmParserImpl(T, P);
}
};
/// RegisterCodeEmitter - Helper template for registering a target specific
/// machine code emitter, for use in the target initialization
/// function. Usage:
///
/// extern "C" void LLVMInitializeFooCodeEmitter() {
/// extern Target TheFooTarget;
/// RegisterCodeEmitter<FooCodeEmitter> X(TheFooTarget);
/// }
template<class CodeEmitterImpl>
struct RegisterCodeEmitter {
RegisterCodeEmitter(Target &T) {
TargetRegistry::RegisterCodeEmitter(T, &Allocator);
}
private:
static MCCodeEmitter *Allocator(const Target &T, TargetMachine &TM) {
return new CodeEmitterImpl(T, TM);
}
};
}
#endif