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https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2 91177308-0d34-0410-b5e6-96231b3b80d8
160 lines
4.9 KiB
C++
160 lines
4.9 KiB
C++
//===-- ParserInternals.h - Definitions internal to the parser ---*- C++ -*--=//
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//
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// This header file defines the various variables that are shared among the
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// different components of the parser...
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//
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//===----------------------------------------------------------------------===//
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#ifndef PARSER_INTERNALS_H
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#define PARSER_INTERNALS_H
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#include <stdio.h>
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#define __STDC_LIMIT_MACROS
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#include "llvm/InstrTypes.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/ConstPoolVals.h"
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#include "llvm/iOther.h"
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#include "llvm/Method.h"
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#include "llvm/Type.h"
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#include "llvm/Assembly/Parser.h"
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#include "llvm/Tools/CommandLine.h"
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#include "llvm/Tools/StringExtras.h"
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class Module;
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// Global variables exported from the lexer...
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extern FILE *llvmAsmin;
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extern int llvmAsmlineno;
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// Globals exported by the parser...
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extern const ToolCommandLine *CurOptions;
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Module *RunVMAsmParser(const ToolCommandLine &Opts, FILE *F);
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// ThrowException - Wrapper around the ParseException class that automatically
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// fills in file line number and column number and options info.
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//
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// This also helps me because I keep typing 'throw new ParseException' instead
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// of just 'throw ParseException'... sigh...
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//
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static inline void ThrowException(const string &message) {
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// TODO: column number in exception
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throw ParseException(*CurOptions, message, llvmAsmlineno);
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}
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// ValID - Represents a reference of a definition of some sort. This may either
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// be a numeric reference or a symbolic (%var) reference. This is just a
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// discriminated union.
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//
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// Note that I can't implement this class in a straight forward manner with
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// constructors and stuff because it goes in a union, and GCC doesn't like
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// putting classes with ctor's in unions. :(
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//
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struct ValID {
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int Type; // 0 = number, 1 = name, 2 = const pool,
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// 3 = unsigned const pool, 4 = const string
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union {
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int Num; // If it's a numeric reference
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char *Name; // If it's a named reference. Memory must be free'd.
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int64_t ConstPool64; // Constant pool reference. This is the value
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uint64_t UConstPool64;// Unsigned constant pool reference.
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};
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static ValID create(int Num) {
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ValID D; D.Type = 0; D.Num = Num; return D;
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}
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static ValID create(char *Name) {
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ValID D; D.Type = 1; D.Name = Name; return D;
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}
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static ValID create(int64_t Val) {
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ValID D; D.Type = 2; D.ConstPool64 = Val; return D;
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}
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static ValID create(uint64_t Val) {
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ValID D; D.Type = 3; D.UConstPool64 = Val; return D;
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}
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static ValID create_conststr(char *Name) {
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ValID D; D.Type = 4; D.Name = Name; return D;
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}
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inline void destroy() {
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if (Type == 1 || Type == 4) free(Name); // Free this strdup'd memory...
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}
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inline ValID copy() const {
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if (Type != 1 && Type != 4) return *this;
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ValID Result = *this;
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Result.Name = strdup(Name);
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return Result;
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}
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inline string getName() const {
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switch (Type) {
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case 0: return string("#") + itostr(Num);
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case 1: return Name;
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case 4: return string("\"") + Name + string("\"");
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default: return string("%") + itostr(ConstPool64);
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}
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}
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};
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template<class SuperType>
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class PlaceholderDef : public SuperType {
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ValID D;
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// TODO: Placeholder def should hold Line #/Column # of definition in case
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// there is an error resolving the defintition!
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public:
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PlaceholderDef(const Type *Ty, const ValID &d) : SuperType(Ty), D(d) {}
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ValID &getDef() { return D; }
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};
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struct InstPlaceHolderHelper : public Instruction {
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InstPlaceHolderHelper(const Type *Ty) : Instruction(Ty, UserOp1, "") {}
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virtual Instruction *clone() const { abort(); }
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inline virtual void dropAllReferences() {}
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virtual string getOpcode() const { return "placeholder"; }
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// No "operands"...
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virtual Value *getOperand(unsigned i) { return 0; }
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virtual const Value *getOperand(unsigned i) const { return 0; }
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virtual bool setOperand(unsigned i, Value *Val) { return false; }
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virtual unsigned getNumOperands() const { return 0; }
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};
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struct BBPlaceHolderHelper : public BasicBlock {
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BBPlaceHolderHelper(const Type *Ty) : BasicBlock() {
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assert(Ty->isLabelType());
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}
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};
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struct MethPlaceHolderHelper : public Method {
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MethPlaceHolderHelper(const Type *Ty)
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: Method((const MethodType*)Ty) {
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assert(Ty->isMethodType() && "Method placeholders must be method types!");
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}
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};
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typedef PlaceholderDef<InstPlaceHolderHelper> DefPlaceHolder;
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typedef PlaceholderDef<BBPlaceHolderHelper> BBPlaceHolder;
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typedef PlaceholderDef<MethPlaceHolderHelper> MethPlaceHolder;
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//typedef PlaceholderDef<ModulePlaceHolderHelper> ModulePlaceHolder;
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static inline ValID &getValIDFromPlaceHolder(Value *Def) {
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switch (Def->getType()->getPrimitiveID()) {
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case Type::LabelTyID: return ((BBPlaceHolder*)Def)->getDef();
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case Type::MethodTyID: return ((MethPlaceHolder*)Def)->getDef();
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//case Type::ModuleTyID: return ((ModulePlaceHolder*)Def)->getDef();
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default: return ((DefPlaceHolder*)Def)->getDef();
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}
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}
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#endif
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