llvm-6502/lib/AsmParser/ParserInternals.h
2003-11-11 22:41:34 +00:00

219 lines
6.8 KiB
C++

//===-- ParserInternals.h - Definitions internal to the parser --*- 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 header file defines the various variables that are shared among the
// different components of the parser...
//
//===----------------------------------------------------------------------===//
#ifndef PARSER_INTERNALS_H
#define PARSER_INTERNALS_H
#include "llvm/Constants.h"
#include "llvm/iOther.h"
#include "llvm/Function.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Assembly/Parser.h"
#include "Support/StringExtras.h"
// Global variables exported from the lexer...
extern std::FILE *llvmAsmin;
extern int llvmAsmlineno;
// Globals exported by the parser...
extern char* llvmAsmtext;
extern int llvmAsmleng;
namespace llvm {
// Globals exported by the parser...
extern std::string CurFilename;
class Module;
Module *RunVMAsmParser(const std::string &Filename, FILE *F);
// UnEscapeLexed - Run through the specified buffer and change \xx codes to the
// appropriate character. If AllowNull is set to false, a \00 value will cause
// an exception to be thrown.
//
// If AllowNull is set to true, the return value of the function points to the
// last character of the string in memory.
//
char *UnEscapeLexed(char *Buffer, bool AllowNull = false);
// ThrowException - Wrapper around the ParseException class that automatically
// fills in file line number and column number and options info.
//
// This also helps me because I keep typing 'throw new ParseException' instead
// of just 'throw ParseException'... sigh...
//
static inline void ThrowException(const std::string &message,
int LineNo = -1) {
if (LineNo == -1) LineNo = llvmAsmlineno;
// TODO: column number in exception
throw ParseException(CurFilename, message, LineNo);
}
// ValID - Represents a reference of a definition of some sort. This may either
// be a numeric reference or a symbolic (%var) reference. This is just a
// discriminated union.
//
// Note that I can't implement this class in a straight forward manner with
// constructors and stuff because it goes in a union, and GCC doesn't like
// putting classes with ctor's in unions. :(
//
struct ValID {
enum {
NumberVal, NameVal, ConstSIntVal, ConstUIntVal, ConstFPVal, ConstNullVal,
ConstantVal,
} Type;
union {
int Num; // If it's a numeric reference
char *Name; // If it's a named reference. Memory must be free'd.
int64_t ConstPool64; // Constant pool reference. This is the value
uint64_t UConstPool64;// Unsigned constant pool reference.
double ConstPoolFP; // Floating point constant pool reference
Constant *ConstantValue; // Fully resolved constant for ConstantVal case.
};
static ValID create(int Num) {
ValID D; D.Type = NumberVal; D.Num = Num; return D;
}
static ValID create(char *Name) {
ValID D; D.Type = NameVal; D.Name = Name; return D;
}
static ValID create(int64_t Val) {
ValID D; D.Type = ConstSIntVal; D.ConstPool64 = Val; return D;
}
static ValID create(uint64_t Val) {
ValID D; D.Type = ConstUIntVal; D.UConstPool64 = Val; return D;
}
static ValID create(double Val) {
ValID D; D.Type = ConstFPVal; D.ConstPoolFP = Val; return D;
}
static ValID createNull() {
ValID D; D.Type = ConstNullVal; return D;
}
static ValID create(Constant *Val) {
ValID D; D.Type = ConstantVal; D.ConstantValue = Val; return D;
}
inline void destroy() const {
if (Type == NameVal)
free(Name); // Free this strdup'd memory...
}
inline ValID copy() const {
if (Type != NameVal) return *this;
ValID Result = *this;
Result.Name = strdup(Name);
return Result;
}
inline std::string getName() const {
switch (Type) {
case NumberVal : return std::string("#") + itostr(Num);
case NameVal : return Name;
case ConstFPVal : return ftostr(ConstPoolFP);
case ConstNullVal : return "null";
case ConstUIntVal :
case ConstSIntVal : return std::string("%") + itostr(ConstPool64);
case ConstantVal:
if (ConstantValue == ConstantBool::True) return "true";
if (ConstantValue == ConstantBool::False) return "false";
return "<constant expression>";
default:
assert(0 && "Unknown value!");
abort();
return "";
}
}
bool operator<(const ValID &V) const {
if (Type != V.Type) return Type < V.Type;
switch (Type) {
case NumberVal: return Num < V.Num;
case NameVal: return strcmp(Name, V.Name) < 0;
case ConstSIntVal: return ConstPool64 < V.ConstPool64;
case ConstUIntVal: return UConstPool64 < V.UConstPool64;
case ConstFPVal: return ConstPoolFP < V.ConstPoolFP;
case ConstNullVal: return false;
case ConstantVal: return ConstantValue < V.ConstantValue;
default: assert(0 && "Unknown value type!"); return false;
}
}
};
template<class SuperType>
class PlaceholderValue : public SuperType {
ValID D;
int LineNum;
public:
PlaceholderValue(const Type *Ty, const ValID &d) : SuperType(Ty), D(d) {
LineNum = llvmAsmlineno;
}
ValID &getDef() { return D; }
int getLineNum() const { return LineNum; }
};
struct InstPlaceHolderHelper : public Instruction {
InstPlaceHolderHelper(const Type *Ty) : Instruction(Ty, UserOp1, "") {}
virtual Instruction *clone() const { abort(); return 0; }
virtual const char *getOpcodeName() const { return "placeholder"; }
};
struct BBPlaceHolderHelper : public BasicBlock {
BBPlaceHolderHelper(const Type *Ty) : BasicBlock() {
assert(Ty == Type::LabelTy);
}
};
typedef PlaceholderValue<InstPlaceHolderHelper> ValuePlaceHolder;
typedef PlaceholderValue<BBPlaceHolderHelper> BBPlaceHolder;
static inline ValID &getValIDFromPlaceHolder(const Value *Val) {
const Type *Ty = Val->getType();
if (isa<PointerType>(Ty) &&
isa<FunctionType>(cast<PointerType>(Ty)->getElementType()))
Ty = cast<PointerType>(Ty)->getElementType();
switch (Ty->getPrimitiveID()) {
case Type::LabelTyID: return ((BBPlaceHolder*)Val)->getDef();
default: return ((ValuePlaceHolder*)Val)->getDef();
}
}
static inline int getLineNumFromPlaceHolder(const Value *Val) {
const Type *Ty = Val->getType();
if (isa<PointerType>(Ty) &&
isa<FunctionType>(cast<PointerType>(Ty)->getElementType()))
Ty = cast<PointerType>(Ty)->getElementType();
switch (Ty->getPrimitiveID()) {
case Type::LabelTyID: return ((BBPlaceHolder*)Val)->getLineNum();
default: return ((ValuePlaceHolder*)Val)->getLineNum();
}
}
} // End llvm namespace
#endif