mirror of
https://github.com/c64scene-ar/llvm-6502.git
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04baf9094a
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80193 91177308-0d34-0410-b5e6-96231b3b80d8
502 lines
18 KiB
C++
502 lines
18 KiB
C++
//===-- Target/TargetRegistry.h - Target Registration -----------*- 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 exposes the TargetRegistry interface, which tools can use to access
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// the appropriate target specific classes (TargetMachine, AsmPrinter, etc.)
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// which have been registered.
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//
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// Target specific class implementations should register themselves using the
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// appropriate TargetRegistry interfaces.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_TARGETREGISTRY_H
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#define LLVM_TARGET_TARGETREGISTRY_H
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#include "llvm/ADT/Triple.h"
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#include <string>
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#include <cassert>
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namespace llvm {
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class AsmPrinter;
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class MCAsmParser;
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class MCCodeEmitter;
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class Module;
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class MCAsmInfo;
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class TargetAsmParser;
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class TargetMachine;
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class formatted_raw_ostream;
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/// Target - Wrapper for Target specific information.
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///
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/// For registration purposes, this is a POD type so that targets can be
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/// registered without the use of static constructors.
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///
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/// Targets should implement a single global instance of this class (which
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/// will be zero initialized), and pass that instance to the TargetRegistry as
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/// part of their initialization.
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class Target {
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public:
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friend struct TargetRegistry;
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typedef unsigned (*TripleMatchQualityFnTy)(const std::string &TT);
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typedef const MCAsmInfo *(*AsmInfoCtorFnTy)(const Target &T,
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const StringRef &TT);
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typedef TargetMachine *(*TargetMachineCtorTy)(const Target &T,
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const std::string &TT,
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const std::string &Features);
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typedef AsmPrinter *(*AsmPrinterCtorTy)(formatted_raw_ostream &OS,
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TargetMachine &TM,
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const MCAsmInfo *MAI,
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bool VerboseAsm);
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typedef TargetAsmParser *(*AsmParserCtorTy)(const Target &T,
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MCAsmParser &P);
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typedef MCCodeEmitter *(*CodeEmitterCtorTy)(const Target &T,
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TargetMachine &TM);
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private:
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/// Next - The next registered target in the linked list, maintained by the
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/// TargetRegistry.
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Target *Next;
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/// TripleMatchQualityFn - The target function for rating the match quality
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/// of a triple.
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TripleMatchQualityFnTy TripleMatchQualityFn;
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/// Name - The target name.
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const char *Name;
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/// ShortDesc - A short description of the target.
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const char *ShortDesc;
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/// HasJIT - Whether this target supports the JIT.
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bool HasJIT;
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AsmInfoCtorFnTy AsmInfoCtorFn;
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/// TargetMachineCtorFn - Construction function for this target's
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/// TargetMachine, if registered.
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TargetMachineCtorTy TargetMachineCtorFn;
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/// AsmPrinterCtorFn - Construction function for this target's AsmPrinter,
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/// if registered.
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AsmPrinterCtorTy AsmPrinterCtorFn;
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/// AsmParserCtorFn - Construction function for this target's AsmParser,
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/// if registered.
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AsmParserCtorTy AsmParserCtorFn;
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/// CodeEmitterCtorFn - Construction function for this target's CodeEmitter,
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/// if registered.
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CodeEmitterCtorTy CodeEmitterCtorFn;
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public:
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/// @name Target Information
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/// @{
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// getNext - Return the next registered target.
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const Target *getNext() const { return Next; }
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/// getName - Get the target name.
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const char *getName() const { return Name; }
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/// getShortDescription - Get a short description of the target.
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const char *getShortDescription() const { return ShortDesc; }
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/// @}
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/// @name Feature Predicates
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/// @{
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/// hasJIT - Check if this targets supports the just-in-time compilation.
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bool hasJIT() const { return HasJIT; }
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/// hasTargetMachine - Check if this target supports code generation.
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bool hasTargetMachine() const { return TargetMachineCtorFn != 0; }
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/// hasAsmPrinter - Check if this target supports .s printing.
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bool hasAsmPrinter() const { return AsmPrinterCtorFn != 0; }
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/// hasAsmParser - Check if this target supports .s parsing.
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bool hasAsmParser() const { return AsmParserCtorFn != 0; }
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/// hasCodeEmitter - Check if this target supports instruction encoding.
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bool hasCodeEmitter() const { return CodeEmitterCtorFn != 0; }
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/// @}
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/// @name Feature Constructors
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/// @{
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/// createAsmInfo - Create a MCAsmInfo implementation for the specified
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/// target triple.
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///
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/// \arg Triple - This argument is used to determine the target machine
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/// feature set; it should always be provided. Generally this should be
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/// either the target triple from the module, or the target triple of the
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/// host if that does not exist.
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const MCAsmInfo *createAsmInfo(const StringRef &Triple) const {
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if (!AsmInfoCtorFn)
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return 0;
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return AsmInfoCtorFn(*this, Triple);
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}
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/// createTargetMachine - Create a target specific machine implementation
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/// for the specified \arg Triple.
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///
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/// \arg Triple - This argument is used to determine the target machine
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/// feature set; it should always be provided. Generally this should be
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/// either the target triple from the module, or the target triple of the
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/// host if that does not exist.
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TargetMachine *createTargetMachine(const std::string &Triple,
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const std::string &Features) const {
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if (!TargetMachineCtorFn)
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return 0;
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return TargetMachineCtorFn(*this, Triple, Features);
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}
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/// createAsmPrinter - Create a target specific assembly printer pass.
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AsmPrinter *createAsmPrinter(formatted_raw_ostream &OS, TargetMachine &TM,
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const MCAsmInfo *MAI, bool Verbose) const {
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if (!AsmPrinterCtorFn)
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return 0;
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return AsmPrinterCtorFn(OS, TM, MAI, Verbose);
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}
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/// createAsmParser - Create a target specific assembly parser.
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///
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/// \arg Parser - The target independent parser implementation to use for
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/// parsing and lexing.
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TargetAsmParser *createAsmParser(MCAsmParser &Parser) const {
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if (!AsmParserCtorFn)
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return 0;
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return AsmParserCtorFn(*this, Parser);
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}
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/// createCodeEmitter - Create a target specific code emitter.
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MCCodeEmitter *createCodeEmitter(TargetMachine &TM) const {
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if (!CodeEmitterCtorFn)
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return 0;
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return CodeEmitterCtorFn(*this, TM);
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}
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/// @}
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};
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/// TargetRegistry - Generic interface to target specific features.
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struct TargetRegistry {
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class iterator {
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const Target *Current;
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explicit iterator(Target *T) : Current(T) {}
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friend struct TargetRegistry;
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public:
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iterator(const iterator &I) : Current(I.Current) {}
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iterator() : Current(0) {}
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bool operator==(const iterator &x) const {
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return Current == x.Current;
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}
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bool operator!=(const iterator &x) const {
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return !operator==(x);
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}
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// Iterator traversal: forward iteration only
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iterator &operator++() { // Preincrement
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assert(Current && "Cannot increment end iterator!");
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Current = Current->getNext();
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return *this;
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}
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iterator operator++(int) { // Postincrement
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iterator tmp = *this;
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++*this;
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return tmp;
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}
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const Target &operator*() const {
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assert(Current && "Cannot dereference end iterator!");
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return *Current;
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}
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const Target *operator->() const {
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return &operator*();
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}
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};
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/// @name Registry Access
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/// @{
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static iterator begin();
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static iterator end() { return iterator(); }
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/// lookupTarget - Lookup a target based on a target triple.
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///
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/// \param Triple - The triple to use for finding a target.
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/// \param Error - On failure, an error string describing why no target was
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/// found.
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static const Target *lookupTarget(const std::string &Triple,
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std::string &Error);
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/// getClosestTargetForJIT - Pick the best target that is compatible with
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/// the current host. If no close target can be found, this returns null
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/// and sets the Error string to a reason.
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///
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/// Maintained for compatibility through 2.6.
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static const Target *getClosestTargetForJIT(std::string &Error);
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/// @}
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/// @name Target Registration
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/// @{
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/// RegisterTarget - Register the given target. Attempts to register a
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/// target which has already been registered will be ignored.
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///
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/// Clients are responsible for ensuring that registration doesn't occur
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/// while another thread is attempting to access the registry. Typically
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/// this is done by initializing all targets at program startup.
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///
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/// @param T - The target being registered.
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/// @param Name - The target name. This should be a static string.
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/// @param ShortDesc - A short target description. This should be a static
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/// string.
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/// @param TQualityFn - The triple match quality computation function for
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/// this target.
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/// @param HasJIT - Whether the target supports JIT code
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/// generation.
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static void RegisterTarget(Target &T,
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const char *Name,
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const char *ShortDesc,
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Target::TripleMatchQualityFnTy TQualityFn,
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bool HasJIT = false);
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/// RegisterAsmInfo - Register a MCAsmInfo implementation for the
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/// given target.
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///
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/// Clients are responsible for ensuring that registration doesn't occur
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/// while another thread is attempting to access the registry. Typically
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/// this is done by initializing all targets at program startup.
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///
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/// @param T - The target being registered.
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/// @param Fn - A function to construct a MCAsmInfo for the target.
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static void RegisterAsmInfo(Target &T, Target::AsmInfoCtorFnTy Fn) {
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// Ignore duplicate registration.
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if (!T.AsmInfoCtorFn)
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T.AsmInfoCtorFn = Fn;
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}
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/// RegisterTargetMachine - Register a TargetMachine implementation for the
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/// given target.
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///
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/// Clients are responsible for ensuring that registration doesn't occur
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/// while another thread is attempting to access the registry. Typically
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/// this is done by initializing all targets at program startup.
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///
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/// @param T - The target being registered.
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/// @param Fn - A function to construct a TargetMachine for the target.
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static void RegisterTargetMachine(Target &T,
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Target::TargetMachineCtorTy Fn) {
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// Ignore duplicate registration.
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if (!T.TargetMachineCtorFn)
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T.TargetMachineCtorFn = Fn;
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}
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/// RegisterAsmPrinter - Register an AsmPrinter implementation for the given
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/// target.
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///
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/// Clients are responsible for ensuring that registration doesn't occur
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/// while another thread is attempting to access the registry. Typically
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/// this is done by initializing all targets at program startup.
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///
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/// @param T - The target being registered.
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/// @param Fn - A function to construct an AsmPrinter for the target.
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static void RegisterAsmPrinter(Target &T, Target::AsmPrinterCtorTy Fn) {
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// Ignore duplicate registration.
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if (!T.AsmPrinterCtorFn)
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T.AsmPrinterCtorFn = Fn;
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}
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/// RegisterAsmParser - Register a TargetAsmParser implementation for the
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/// given target.
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///
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/// Clients are responsible for ensuring that registration doesn't occur
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/// while another thread is attempting to access the registry. Typically
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/// this is done by initializing all targets at program startup.
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///
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/// @param T - The target being registered.
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/// @param Fn - A function to construct an AsmPrinter for the target.
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static void RegisterAsmParser(Target &T, Target::AsmParserCtorTy Fn) {
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if (!T.AsmParserCtorFn)
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T.AsmParserCtorFn = Fn;
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}
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/// RegisterCodeEmitter - Register a MCCodeEmitter implementation for the
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/// given target.
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///
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/// Clients are responsible for ensuring that registration doesn't occur
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/// while another thread is attempting to access the registry. Typically
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/// this is done by initializing all targets at program startup.
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///
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/// @param T - The target being registered.
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/// @param Fn - A function to construct an AsmPrinter for the target.
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static void RegisterCodeEmitter(Target &T, Target::CodeEmitterCtorTy Fn) {
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if (!T.CodeEmitterCtorFn)
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T.CodeEmitterCtorFn = Fn;
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}
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/// @}
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};
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//===--------------------------------------------------------------------===//
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/// RegisterTarget - Helper template for registering a target, for use in the
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/// target's initialization function. Usage:
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///
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///
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/// Target TheFooTarget; // The global target instance.
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///
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/// extern "C" void LLVMInitializeFooTargetInfo() {
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/// RegisterTarget<Triple::foo> X(TheFooTarget, "foo", "Foo description");
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/// }
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template<Triple::ArchType TargetArchType = Triple::InvalidArch,
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bool HasJIT = false>
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struct RegisterTarget {
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RegisterTarget(Target &T, const char *Name, const char *Desc) {
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TargetRegistry::RegisterTarget(T, Name, Desc,
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&getTripleMatchQuality,
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HasJIT);
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}
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static unsigned getTripleMatchQuality(const std::string &TT) {
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if (Triple(TT.c_str()).getArch() == TargetArchType)
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return 20;
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return 0;
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}
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};
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/// RegisterAsmInfo - Helper template for registering a target assembly info
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/// implementation. This invokes the static "Create" method on the class to
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/// actually do the construction. Usage:
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///
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/// extern "C" void LLVMInitializeFooTarget() {
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/// extern Target TheFooTarget;
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/// RegisterAsmInfo<FooMCAsmInfo> X(TheFooTarget);
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/// }
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template<class MCAsmInfoImpl>
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struct RegisterAsmInfo {
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RegisterAsmInfo(Target &T) {
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TargetRegistry::RegisterAsmInfo(T, &Allocator);
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}
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private:
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static const MCAsmInfo *Allocator(const Target &T, const StringRef &TT) {
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return new MCAsmInfoImpl(T, TT);
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}
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};
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/// RegisterAsmInfoFn - Helper template for registering a target assembly info
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/// implementation. This invokes the specified function to do the
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/// construction. Usage:
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///
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/// extern "C" void LLVMInitializeFooTarget() {
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/// extern Target TheFooTarget;
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/// RegisterAsmInfoFn X(TheFooTarget, TheFunction);
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/// }
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struct RegisterAsmInfoFn {
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RegisterAsmInfoFn(Target &T, Target::AsmInfoCtorFnTy Fn) {
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TargetRegistry::RegisterAsmInfo(T, Fn);
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}
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};
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/// RegisterTargetMachine - Helper template for registering a target machine
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/// implementation, for use in the target machine initialization
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/// function. Usage:
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///
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/// extern "C" void LLVMInitializeFooTarget() {
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/// extern Target TheFooTarget;
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/// RegisterTargetMachine<FooTargetMachine> X(TheFooTarget);
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/// }
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template<class TargetMachineImpl>
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struct RegisterTargetMachine {
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RegisterTargetMachine(Target &T) {
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TargetRegistry::RegisterTargetMachine(T, &Allocator);
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}
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private:
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static TargetMachine *Allocator(const Target &T, const std::string &TT,
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const std::string &FS) {
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return new TargetMachineImpl(T, TT, FS);
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}
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};
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/// RegisterAsmPrinter - Helper template for registering a target specific
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/// assembly printer, for use in the target machine initialization
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/// function. Usage:
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///
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/// extern "C" void LLVMInitializeFooAsmPrinter() {
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/// extern Target TheFooTarget;
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/// RegisterAsmPrinter<FooAsmPrinter> X(TheFooTarget);
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/// }
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template<class AsmPrinterImpl>
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struct RegisterAsmPrinter {
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RegisterAsmPrinter(Target &T) {
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TargetRegistry::RegisterAsmPrinter(T, &Allocator);
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}
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private:
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static AsmPrinter *Allocator(formatted_raw_ostream &OS, TargetMachine &TM,
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const MCAsmInfo *MAI, bool Verbose) {
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return new AsmPrinterImpl(OS, TM, MAI, Verbose);
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}
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};
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/// RegisterAsmParser - Helper template for registering a target specific
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/// assembly parser, for use in the target machine initialization
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/// function. Usage:
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///
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/// extern "C" void LLVMInitializeFooAsmParser() {
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/// extern Target TheFooTarget;
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/// RegisterAsmParser<FooAsmParser> X(TheFooTarget);
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/// }
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template<class AsmParserImpl>
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struct RegisterAsmParser {
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RegisterAsmParser(Target &T) {
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TargetRegistry::RegisterAsmParser(T, &Allocator);
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}
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private:
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static TargetAsmParser *Allocator(const Target &T, MCAsmParser &P) {
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return new AsmParserImpl(T, P);
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}
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};
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/// RegisterCodeEmitter - Helper template for registering a target specific
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/// machine code emitter, for use in the target initialization
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/// function. Usage:
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///
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/// extern "C" void LLVMInitializeFooCodeEmitter() {
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/// extern Target TheFooTarget;
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/// RegisterCodeEmitter<FooCodeEmitter> X(TheFooTarget);
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/// }
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template<class CodeEmitterImpl>
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struct RegisterCodeEmitter {
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RegisterCodeEmitter(Target &T) {
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TargetRegistry::RegisterCodeEmitter(T, &Allocator);
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}
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private:
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static MCCodeEmitter *Allocator(const Target &T, TargetMachine &TM) {
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return new CodeEmitterImpl(T, TM);
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}
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};
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}
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#endif
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