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