1 //===-- ParserInternals.h - Definitions internal to the parser ---*- C++ -*--=//
3 // This header file defines the various variables that are shared among the
4 // different components of the parser...
6 //===----------------------------------------------------------------------===//
8 #ifndef PARSER_INTERNALS_H
9 #define PARSER_INTERNALS_H
11 #define __STDC_LIMIT_MACROS
12 #include "llvm/BasicBlock.h"
13 #include "llvm/Constants.h"
14 #include "llvm/iOther.h"
15 #include "llvm/Function.h"
16 #include "llvm/DerivedTypes.h"
17 #include "llvm/Assembly/Parser.h"
18 #include "Support/StringExtras.h"
22 // Global variables exported from the lexer...
23 extern std::FILE *llvmAsmin;
24 extern int llvmAsmlineno;
26 // Globals exported by the parser...
27 extern std::string CurFilename;
28 Module *RunVMAsmParser(const std::string &Filename, FILE *F);
30 extern char* llvmAsmtext;
31 extern int llvmAsmleng;
33 // UnEscapeLexed - Run through the specified buffer and change \xx codes to the
34 // appropriate character. If AllowNull is set to false, a \00 value will cause
35 // an exception to be thrown.
37 // If AllowNull is set to true, the return value of the function points to the
38 // last character of the string in memory.
40 char *UnEscapeLexed(char *Buffer, bool AllowNull = false);
43 // ThrowException - Wrapper around the ParseException class that automatically
44 // fills in file line number and column number and options info.
46 // This also helps me because I keep typing 'throw new ParseException' instead
47 // of just 'throw ParseException'... sigh...
49 static inline void ThrowException(const std::string &message,
51 if (LineNo == -1) LineNo = llvmAsmlineno;
52 // TODO: column number in exception
53 throw ParseException(CurFilename, message, LineNo);
56 // ValID - Represents a reference of a definition of some sort. This may either
57 // be a numeric reference or a symbolic (%var) reference. This is just a
58 // discriminated union.
60 // Note that I can't implement this class in a straight forward manner with
61 // constructors and stuff because it goes in a union, and GCC doesn't like
62 // putting classes with ctor's in unions. :(
66 NumberVal, NameVal, ConstSIntVal, ConstUIntVal, ConstFPVal, ConstNullVal,
71 int Num; // If it's a numeric reference
72 char *Name; // If it's a named reference. Memory must be free'd.
73 int64_t ConstPool64; // Constant pool reference. This is the value
74 uint64_t UConstPool64;// Unsigned constant pool reference.
75 double ConstPoolFP; // Floating point constant pool reference
76 Constant *ConstantValue; // Fully resolved constant for ConstantVal case.
79 static ValID create(int Num) {
80 ValID D; D.Type = NumberVal; D.Num = Num; return D;
83 static ValID create(char *Name) {
84 ValID D; D.Type = NameVal; D.Name = Name; return D;
87 static ValID create(int64_t Val) {
88 ValID D; D.Type = ConstSIntVal; D.ConstPool64 = Val; return D;
91 static ValID create(uint64_t Val) {
92 ValID D; D.Type = ConstUIntVal; D.UConstPool64 = Val; return D;
95 static ValID create(double Val) {
96 ValID D; D.Type = ConstFPVal; D.ConstPoolFP = Val; return D;
99 static ValID createNull() {
100 ValID D; D.Type = ConstNullVal; return D;
103 static ValID create(Constant *Val) {
104 ValID D; D.Type = ConstantVal; D.ConstantValue = Val; return D;
107 inline void destroy() const {
109 free(Name); // Free this strdup'd memory...
112 inline ValID copy() const {
113 if (Type != NameVal) return *this;
114 ValID Result = *this;
115 Result.Name = strdup(Name);
119 inline std::string getName() const {
121 case NumberVal : return std::string("#") + itostr(Num);
122 case NameVal : return Name;
123 case ConstFPVal : return ftostr(ConstPoolFP);
124 case ConstNullVal : return "null";
126 case ConstSIntVal : return std::string("%") + itostr(ConstPool64);
128 if (ConstantValue == ConstantBool::True) return "true";
129 if (ConstantValue == ConstantBool::False) return "false";
130 return "<constant expression>";
132 assert(0 && "Unknown value!");
138 bool operator<(const ValID &V) const {
139 if (Type != V.Type) return Type < V.Type;
141 case NumberVal: return Num < V.Num;
142 case NameVal: return strcmp(Name, V.Name) < 0;
143 case ConstSIntVal: return ConstPool64 < V.ConstPool64;
144 case ConstUIntVal: return UConstPool64 < V.UConstPool64;
145 case ConstFPVal: return ConstPoolFP < V.ConstPoolFP;
146 case ConstNullVal: return false;
147 case ConstantVal: return ConstantValue < V.ConstantValue;
148 default: assert(0 && "Unknown value type!"); return false;
155 template<class SuperType>
156 class PlaceholderValue : public SuperType {
160 PlaceholderValue(const Type *Ty, const ValID &d) : SuperType(Ty), D(d) {
161 LineNum = llvmAsmlineno;
163 ValID &getDef() { return D; }
164 int getLineNum() const { return LineNum; }
167 struct InstPlaceHolderHelper : public Instruction {
168 InstPlaceHolderHelper(const Type *Ty) : Instruction(Ty, UserOp1, "") {}
170 virtual Instruction *clone() const { abort(); return 0; }
171 virtual const char *getOpcodeName() const { return "placeholder"; }
174 struct BBPlaceHolderHelper : public BasicBlock {
175 BBPlaceHolderHelper(const Type *Ty) : BasicBlock() {
176 assert(Ty == Type::LabelTy);
180 struct MethPlaceHolderHelper : public Function {
181 MethPlaceHolderHelper(const Type *Ty)
182 : Function(cast<FunctionType>(Ty), true) {}
185 typedef PlaceholderValue<InstPlaceHolderHelper> ValuePlaceHolder;
186 typedef PlaceholderValue<BBPlaceHolderHelper> BBPlaceHolder;
188 static inline ValID &getValIDFromPlaceHolder(const Value *Val) {
189 const Type *Ty = Val->getType();
190 if (isa<PointerType>(Ty) &&
191 isa<FunctionType>(cast<PointerType>(Ty)->getElementType()))
192 Ty = cast<PointerType>(Ty)->getElementType();
194 switch (Ty->getPrimitiveID()) {
195 case Type::LabelTyID: return ((BBPlaceHolder*)Val)->getDef();
196 default: return ((ValuePlaceHolder*)Val)->getDef();
200 static inline int getLineNumFromPlaceHolder(const Value *Val) {
201 const Type *Ty = Val->getType();
202 if (isa<PointerType>(Ty) &&
203 isa<FunctionType>(cast<PointerType>(Ty)->getElementType()))
204 Ty = cast<PointerType>(Ty)->getElementType();
206 switch (Ty->getPrimitiveID()) {
207 case Type::LabelTyID: return ((BBPlaceHolder*)Val)->getLineNum();
208 default: return ((ValuePlaceHolder*)Val)->getLineNum();