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//===-- ParserInternals.h - Definitions internal to the parser --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header file defines the variables that are shared between the lexer,
// the parser, and the main program.
//
//===----------------------------------------------------------------------===//
#ifndef PARSER_INTERNALS_H
#define PARSER_INTERNALS_H
#include <string>
#include <istream>
// Global variables exported from the lexer...
extern std::string CurFileName;
extern std::string Textin;
extern int Upgradelineno;
extern std::istream* LexInput;
void UpgradeAssembly(
const std::string & infile, std::istream& in, std::ostream &out, bool debug);
// Globals exported by the parser...
extern char* Upgradetext;
extern int Upgradeleng;
extern unsigned SizeOfPointer;
int yyerror(const char *ErrorMsg) ;
/// This enum is used to keep track of the original (1.9) type used to form
/// a type. These are needed for type upgrades and to determine how to upgrade
/// signed instructions with signless operands.
enum Types {
BoolTy, SByteTy, UByteTy, ShortTy, UShortTy, IntTy, UIntTy, LongTy, ULongTy,
FloatTy, DoubleTy, PointerTy, PackedTy, ArrayTy, StructTy, OpaqueTy, VoidTy,
LabelTy, FunctionTy, UnresolvedTy, NumericTy
};
/// This type is used to keep track of the signedness of the obsolete
/// integer types. Instead of creating an llvm::Type directly, the Lexer will
/// create instances of TypeInfo which retains the signedness indication so
/// it can be used by the parser for upgrade decisions.
/// For example if "uint" is encountered then the "first" field will be set
/// to "int32" and the "second" field will be set to "isUnsigned". If the
/// type is not obsolete then "second" will be set to "isSignless".
struct TypeInfo {
std::string* newTy;
Types oldTy;
void destroy() const { delete newTy; }
bool isSigned() const {
return oldTy == SByteTy || oldTy == ShortTy ||
oldTy == IntTy || oldTy == LongTy;
}
bool isUnsigned() const {
return oldTy == UByteTy || oldTy == UShortTy ||
oldTy == UIntTy || oldTy == ULongTy;
}
bool isSignless() const { return !isSigned() && !isUnsigned(); }
bool isInteger() const { return isSigned() || isUnsigned(); }
bool isIntegral() const { return oldTy == BoolTy || isInteger(); }
bool isFloatingPoint() const { return oldTy == DoubleTy || oldTy == FloatTy; }
bool isPacked() const { return oldTy == PackedTy; }
bool isPointer() const { return oldTy == PointerTy; }
bool isOther() const {
return !isPacked() && !isPointer() && !isFloatingPoint() && !isIntegral(); }
unsigned getBitWidth() const {
switch (oldTy) {
case LabelTy:
case VoidTy : return 0;
case BoolTy : return 1;
case SByteTy: case UByteTy : return 8;
case ShortTy: case UShortTy : return 16;
case IntTy: case UIntTy: case FloatTy: return 32;
case LongTy: case ULongTy: case DoubleTy : return 64;
case PointerTy: return SizeOfPointer; // global var
default:
return 128; /// Struct/Packed/Array --> doesn't matter
}
}
};
/// This type is used to keep track of the signedness of values. Instead
/// of creating llvm::Value directly, the parser will create ValueInfo which
/// associates a Value* with a Signedness indication.
struct ValueInfo {
std::string* val;
TypeInfo type;
void destroy() { delete val; type.destroy(); }
};
/// This type is used to keep track of the signedness of constants.
struct ConstInfo {
std::string *cnst;
TypeInfo type;
void destroy() { delete cnst; type.destroy(); }
};
#endif
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