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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10596 91177308-0d34-0410-b5e6-96231b3b80d8
218 lines
6.7 KiB
C++
218 lines
6.7 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 the LLVM research group 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 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 "llvm/Constants.h"
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#include "llvm/iOther.h"
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#include "llvm/Function.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Assembly/Parser.h"
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#include "Support/StringExtras.h"
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// Global variables exported from the lexer...
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extern std::FILE *llvmAsmin;
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extern int llvmAsmlineno;
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// Globals exported by the parser...
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extern char* llvmAsmtext;
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extern int llvmAsmleng;
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namespace llvm {
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// Globals exported by the parser...
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extern std::string CurFilename;
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class Module;
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Module *RunVMAsmParser(const std::string &Filename, FILE *F);
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// UnEscapeLexed - Run through the specified buffer and change \xx codes to the
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// appropriate character. If AllowNull is set to false, a \00 value will cause
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// an exception to be thrown.
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//
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// If AllowNull is set to true, the return value of the function points to the
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// last character of the string in memory.
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//
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char *UnEscapeLexed(char *Buffer, bool AllowNull = false);
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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 std::string &message,
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int LineNo = -1) {
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if (LineNo == -1) LineNo = llvmAsmlineno;
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// TODO: column number in exception
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throw ParseException(CurFilename, message, LineNo);
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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.
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//
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struct ValID {
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enum {
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NumberVal, NameVal, ConstSIntVal, ConstUIntVal, ConstFPVal, ConstNullVal,
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ConstantVal,
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} Type;
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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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double ConstPoolFP; // Floating point constant pool reference
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Constant *ConstantValue; // Fully resolved constant for ConstantVal case.
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};
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static ValID create(int Num) {
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ValID D; D.Type = NumberVal; 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 = NameVal; 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 = ConstSIntVal; 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 = ConstUIntVal; D.UConstPool64 = Val; return D;
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}
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static ValID create(double Val) {
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ValID D; D.Type = ConstFPVal; D.ConstPoolFP = Val; return D;
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}
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static ValID createNull() {
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ValID D; D.Type = ConstNullVal; return D;
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}
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static ValID create(Constant *Val) {
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ValID D; D.Type = ConstantVal; D.ConstantValue = Val; return D;
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}
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inline void destroy() const {
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if (Type == NameVal)
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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 != NameVal) 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 std::string getName() const {
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switch (Type) {
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case NumberVal : return std::string("#") + itostr(Num);
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case NameVal : return Name;
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case ConstFPVal : return ftostr(ConstPoolFP);
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case ConstNullVal : return "null";
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case ConstUIntVal :
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case ConstSIntVal : return std::string("%") + itostr(ConstPool64);
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case ConstantVal:
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if (ConstantValue == ConstantBool::True) return "true";
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if (ConstantValue == ConstantBool::False) return "false";
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return "<constant expression>";
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default:
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assert(0 && "Unknown value!");
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abort();
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return "";
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}
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}
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bool operator<(const ValID &V) const {
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if (Type != V.Type) return Type < V.Type;
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switch (Type) {
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case NumberVal: return Num < V.Num;
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case NameVal: return strcmp(Name, V.Name) < 0;
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case ConstSIntVal: return ConstPool64 < V.ConstPool64;
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case ConstUIntVal: return UConstPool64 < V.UConstPool64;
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case ConstFPVal: return ConstPoolFP < V.ConstPoolFP;
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case ConstNullVal: return false;
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case ConstantVal: return ConstantValue < V.ConstantValue;
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default: assert(0 && "Unknown value type!"); return false;
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}
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}
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};
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template<class SuperType>
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class PlaceholderValue : public SuperType {
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ValID D;
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int LineNum;
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public:
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PlaceholderValue(const Type *Ty, const ValID &d) : SuperType(Ty), D(d) {
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LineNum = llvmAsmlineno;
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}
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ValID &getDef() { return D; }
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int getLineNum() const { return LineNum; }
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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(); return 0; }
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virtual const char *getOpcodeName() const { return "placeholder"; }
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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 == Type::LabelTy);
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}
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};
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typedef PlaceholderValue<InstPlaceHolderHelper> ValuePlaceHolder;
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typedef PlaceholderValue<BBPlaceHolderHelper> BBPlaceHolder;
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static inline ValID &getValIDFromPlaceHolder(const Value *Val) {
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const Type *Ty = Val->getType();
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if (isa<PointerType>(Ty) &&
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isa<FunctionType>(cast<PointerType>(Ty)->getElementType()))
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Ty = cast<PointerType>(Ty)->getElementType();
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switch (Ty->getPrimitiveID()) {
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case Type::LabelTyID: return ((BBPlaceHolder*)Val)->getDef();
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default: return ((ValuePlaceHolder*)Val)->getDef();
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}
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}
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static inline int getLineNumFromPlaceHolder(const Value *Val) {
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const Type *Ty = Val->getType();
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if (isa<PointerType>(Ty) &&
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isa<FunctionType>(cast<PointerType>(Ty)->getElementType()))
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Ty = cast<PointerType>(Ty)->getElementType();
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switch (Ty->getPrimitiveID()) {
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case Type::LabelTyID: return ((BBPlaceHolder*)Val)->getLineNum();
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default: return ((ValuePlaceHolder*)Val)->getLineNum();
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}
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}
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} // End llvm namespace
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#endif
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