1 //===-- LLParser.h - Parser Class -------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the parser class for .ll files.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_ASMPARSER_LLPARSER_H
15 #define LLVM_LIB_ASMPARSER_LLPARSER_H
18 #include "llvm/ADT/DenseMap.h"
19 #include "llvm/ADT/StringMap.h"
20 #include "llvm/IR/Attributes.h"
21 #include "llvm/IR/Instructions.h"
22 #include "llvm/IR/Module.h"
23 #include "llvm/IR/Operator.h"
24 #include "llvm/IR/Type.h"
25 #include "llvm/IR/ValueHandle.h"
43 /// ValID - Represents a reference of a definition of some sort with no type.
44 /// There are several cases where we have to parse the value but where the
45 /// type can depend on later context. This may either be a numeric reference
46 /// or a symbolic (%var) reference. This is just a discriminated union.
49 t_LocalID, t_GlobalID, // ID in UIntVal.
50 t_LocalName, t_GlobalName, // Name in StrVal.
51 t_APSInt, t_APFloat, // Value in APSIntVal/APFloatVal.
52 t_Null, t_Undef, t_Zero, // No value.
53 t_EmptyArray, // No value: []
54 t_Constant, // Value in ConstantVal.
55 t_InlineAsm, // Value in StrVal/StrVal2/UIntVal.
56 t_ConstantStruct, // Value in ConstantStructElts.
57 t_PackedConstantStruct // Value in ConstantStructElts.
62 std::string StrVal, StrVal2;
65 Constant *ConstantVal;
66 Constant **ConstantStructElts;
68 ValID() : Kind(t_LocalID), APFloatVal(0.0) {}
70 if (Kind == t_ConstantStruct || Kind == t_PackedConstantStruct)
71 delete [] ConstantStructElts;
74 bool operator<(const ValID &RHS) const {
75 if (Kind == t_LocalID || Kind == t_GlobalID)
76 return UIntVal < RHS.UIntVal;
77 assert((Kind == t_LocalName || Kind == t_GlobalName ||
78 Kind == t_ConstantStruct || Kind == t_PackedConstantStruct) &&
79 "Ordering not defined for this ValID kind yet");
80 return StrVal < RHS.StrVal;
86 typedef LLLexer::LocTy LocTy;
93 // Instruction metadata resolution. Each instruction can have a list of
94 // MDRef info associated with them.
96 // The simpler approach of just creating temporary MDNodes and then calling
97 // RAUW on them when the definition is processed doesn't work because some
98 // instruction metadata kinds, such as dbg, get stored in the IR in an
99 // "optimized" format which doesn't participate in the normal value use
100 // lists. This means that RAUW doesn't work, even on temporary MDNodes
101 // which otherwise support RAUW. Instead, we defer resolving MDNode
102 // references until the definitions have been processed.
105 unsigned MDKind, MDSlot;
108 SmallVector<Instruction*, 64> InstsWithTBAATag;
110 // Type resolution handling data structures. The location is set when we
111 // have processed a use of the type but not a definition yet.
112 StringMap<std::pair<Type*, LocTy> > NamedTypes;
113 std::map<unsigned, std::pair<Type*, LocTy> > NumberedTypes;
115 std::map<unsigned, TrackingMDNodeRef> NumberedMetadata;
116 std::map<unsigned, std::pair<TempMDTuple, LocTy>> ForwardRefMDNodes;
118 // Global Value reference information.
119 std::map<std::string, std::pair<GlobalValue*, LocTy> > ForwardRefVals;
120 std::map<unsigned, std::pair<GlobalValue*, LocTy> > ForwardRefValIDs;
121 std::vector<GlobalValue*> NumberedVals;
123 // Comdat forward reference information.
124 std::map<std::string, LocTy> ForwardRefComdats;
126 // References to blockaddress. The key is the function ValID, the value is
127 // a list of references to blocks in that function.
128 std::map<ValID, std::map<ValID, GlobalValue *>> ForwardRefBlockAddresses;
129 class PerFunctionState;
130 /// Reference to per-function state to allow basic blocks to be
131 /// forward-referenced by blockaddress instructions within the same
133 PerFunctionState *BlockAddressPFS;
135 // Attribute builder reference information.
136 std::map<Value*, std::vector<unsigned> > ForwardRefAttrGroups;
137 std::map<unsigned, AttrBuilder> NumberedAttrBuilders;
140 LLParser(StringRef F, SourceMgr &SM, SMDiagnostic &Err, Module *M,
141 SlotMapping *Slots = nullptr)
142 : Context(M->getContext()), Lex(F, SM, Err, M->getContext()), M(M),
143 Slots(Slots), BlockAddressPFS(nullptr) {}
146 LLVMContext &getContext() { return Context; }
150 bool Error(LocTy L, const Twine &Msg) const {
151 return Lex.Error(L, Msg);
153 bool TokError(const Twine &Msg) const {
154 return Error(Lex.getLoc(), Msg);
157 /// GetGlobalVal - Get a value with the specified name or ID, creating a
158 /// forward reference record if needed. This can return null if the value
159 /// exists but does not have the right type.
160 GlobalValue *GetGlobalVal(const std::string &N, Type *Ty, LocTy Loc);
161 GlobalValue *GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc);
163 /// Get a Comdat with the specified name, creating a forward reference
164 /// record if needed.
165 Comdat *getComdat(const std::string &N, LocTy Loc);
168 bool ParseToken(lltok::Kind T, const char *ErrMsg);
169 bool EatIfPresent(lltok::Kind T) {
170 if (Lex.getKind() != T) return false;
175 FastMathFlags EatFastMathFlagsIfPresent() {
178 switch (Lex.getKind()) {
179 case lltok::kw_fast: FMF.setUnsafeAlgebra(); Lex.Lex(); continue;
180 case lltok::kw_nnan: FMF.setNoNaNs(); Lex.Lex(); continue;
181 case lltok::kw_ninf: FMF.setNoInfs(); Lex.Lex(); continue;
182 case lltok::kw_nsz: FMF.setNoSignedZeros(); Lex.Lex(); continue;
183 case lltok::kw_arcp: FMF.setAllowReciprocal(); Lex.Lex(); continue;
189 bool ParseOptionalToken(lltok::Kind T, bool &Present,
190 LocTy *Loc = nullptr) {
191 if (Lex.getKind() != T) {
201 bool ParseStringConstant(std::string &Result);
202 bool ParseUInt32(unsigned &Val);
203 bool ParseUInt32(unsigned &Val, LocTy &Loc) {
205 return ParseUInt32(Val);
207 bool ParseUInt64(uint64_t &Val);
208 bool ParseUInt64(uint64_t &Val, LocTy &Loc) {
210 return ParseUInt64(Val);
213 bool ParseTLSModel(GlobalVariable::ThreadLocalMode &TLM);
214 bool ParseOptionalThreadLocal(GlobalVariable::ThreadLocalMode &TLM);
215 bool parseOptionalUnnamedAddr(bool &UnnamedAddr) {
216 return ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr);
218 bool ParseOptionalAddrSpace(unsigned &AddrSpace);
219 bool ParseOptionalParamAttrs(AttrBuilder &B);
220 bool ParseOptionalReturnAttrs(AttrBuilder &B);
221 bool ParseOptionalLinkage(unsigned &Linkage, bool &HasLinkage);
222 bool ParseOptionalLinkage(unsigned &Linkage) {
223 bool HasLinkage; return ParseOptionalLinkage(Linkage, HasLinkage);
225 bool ParseOptionalVisibility(unsigned &Visibility);
226 bool ParseOptionalDLLStorageClass(unsigned &DLLStorageClass);
227 bool ParseOptionalCallingConv(unsigned &CC);
228 bool ParseOptionalAlignment(unsigned &Alignment);
229 bool ParseOptionalDerefAttrBytes(lltok::Kind AttrKind, uint64_t &Bytes);
230 bool ParseScopeAndOrdering(bool isAtomic, SynchronizationScope &Scope,
231 AtomicOrdering &Ordering);
232 bool ParseOrdering(AtomicOrdering &Ordering);
233 bool ParseOptionalStackAlignment(unsigned &Alignment);
234 bool ParseOptionalCommaAlign(unsigned &Alignment, bool &AteExtraComma);
235 bool ParseOptionalCommaInAlloca(bool &IsInAlloca);
236 bool ParseIndexList(SmallVectorImpl<unsigned> &Indices,bool &AteExtraComma);
237 bool ParseIndexList(SmallVectorImpl<unsigned> &Indices) {
239 if (ParseIndexList(Indices, AteExtraComma)) return true;
241 return TokError("expected index");
245 // Top-Level Entities
246 bool ParseTopLevelEntities();
247 bool ValidateEndOfModule();
248 bool ParseTargetDefinition();
249 bool ParseModuleAsm();
250 bool ParseDepLibs(); // FIXME: Remove in 4.0.
251 bool ParseUnnamedType();
252 bool ParseNamedType();
256 bool ParseGlobalType(bool &IsConstant);
257 bool ParseUnnamedGlobal();
258 bool ParseNamedGlobal();
259 bool ParseGlobal(const std::string &Name, LocTy Loc, unsigned Linkage,
260 bool HasLinkage, unsigned Visibility,
261 unsigned DLLStorageClass,
262 GlobalVariable::ThreadLocalMode TLM, bool UnnamedAddr);
263 bool ParseAlias(const std::string &Name, LocTy Loc, unsigned Linkage,
264 unsigned Visibility, unsigned DLLStorageClass,
265 GlobalVariable::ThreadLocalMode TLM, bool UnnamedAddr);
267 bool ParseStandaloneMetadata();
268 bool ParseNamedMetadata();
269 bool ParseMDString(MDString *&Result);
270 bool ParseMDNodeID(MDNode *&Result);
271 bool ParseUnnamedAttrGrp();
272 bool ParseFnAttributeValuePairs(AttrBuilder &B,
273 std::vector<unsigned> &FwdRefAttrGrps,
274 bool inAttrGrp, LocTy &BuiltinLoc);
277 bool ParseType(Type *&Result, const Twine &Msg, bool AllowVoid = false);
278 bool ParseType(Type *&Result, bool AllowVoid = false) {
279 return ParseType(Result, "expected type", AllowVoid);
281 bool ParseType(Type *&Result, const Twine &Msg, LocTy &Loc,
282 bool AllowVoid = false) {
284 return ParseType(Result, Msg, AllowVoid);
286 bool ParseType(Type *&Result, LocTy &Loc, bool AllowVoid = false) {
288 return ParseType(Result, AllowVoid);
290 bool ParseAnonStructType(Type *&Result, bool Packed);
291 bool ParseStructBody(SmallVectorImpl<Type*> &Body);
292 bool ParseStructDefinition(SMLoc TypeLoc, StringRef Name,
293 std::pair<Type*, LocTy> &Entry,
296 bool ParseArrayVectorType(Type *&Result, bool isVector);
297 bool ParseFunctionType(Type *&Result);
299 // Function Semantic Analysis.
300 class PerFunctionState {
303 std::map<std::string, std::pair<Value*, LocTy> > ForwardRefVals;
304 std::map<unsigned, std::pair<Value*, LocTy> > ForwardRefValIDs;
305 std::vector<Value*> NumberedVals;
307 /// FunctionNumber - If this is an unnamed function, this is the slot
308 /// number of it, otherwise it is -1.
311 PerFunctionState(LLParser &p, Function &f, int FunctionNumber);
314 Function &getFunction() const { return F; }
316 bool FinishFunction();
318 /// GetVal - Get a value with the specified name or ID, creating a
319 /// forward reference record if needed. This can return null if the value
320 /// exists but does not have the right type.
321 Value *GetVal(const std::string &Name, Type *Ty, LocTy Loc);
322 Value *GetVal(unsigned ID, Type *Ty, LocTy Loc);
324 /// SetInstName - After an instruction is parsed and inserted into its
325 /// basic block, this installs its name.
326 bool SetInstName(int NameID, const std::string &NameStr, LocTy NameLoc,
329 /// GetBB - Get a basic block with the specified name or ID, creating a
330 /// forward reference record if needed. This can return null if the value
331 /// is not a BasicBlock.
332 BasicBlock *GetBB(const std::string &Name, LocTy Loc);
333 BasicBlock *GetBB(unsigned ID, LocTy Loc);
335 /// DefineBB - Define the specified basic block, which is either named or
336 /// unnamed. If there is an error, this returns null otherwise it returns
337 /// the block being defined.
338 BasicBlock *DefineBB(const std::string &Name, LocTy Loc);
340 bool resolveForwardRefBlockAddresses();
343 bool ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V,
344 PerFunctionState *PFS);
346 bool ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS);
347 bool ParseValue(Type *Ty, Value *&V, PerFunctionState &PFS) {
348 return ParseValue(Ty, V, &PFS);
350 bool ParseValue(Type *Ty, Value *&V, LocTy &Loc,
351 PerFunctionState &PFS) {
353 return ParseValue(Ty, V, &PFS);
356 bool ParseTypeAndValue(Value *&V, PerFunctionState *PFS);
357 bool ParseTypeAndValue(Value *&V, PerFunctionState &PFS) {
358 return ParseTypeAndValue(V, &PFS);
360 bool ParseTypeAndValue(Value *&V, LocTy &Loc, PerFunctionState &PFS) {
362 return ParseTypeAndValue(V, PFS);
364 bool ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc,
365 PerFunctionState &PFS);
366 bool ParseTypeAndBasicBlock(BasicBlock *&BB, PerFunctionState &PFS) {
368 return ParseTypeAndBasicBlock(BB, Loc, PFS);
376 ParamInfo(LocTy loc, Value *v, AttributeSet attrs)
377 : Loc(loc), V(v), Attrs(attrs) {}
379 bool ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
380 PerFunctionState &PFS,
381 bool IsMustTailCall = false,
382 bool InVarArgsFunc = false);
385 bool ParseValID(ValID &ID, PerFunctionState *PFS = nullptr);
386 bool ParseGlobalValue(Type *Ty, Constant *&V);
387 bool ParseGlobalTypeAndValue(Constant *&V);
388 bool ParseGlobalValueVector(SmallVectorImpl<Constant *> &Elts);
389 bool parseOptionalComdat(StringRef GlobalName, Comdat *&C);
390 bool ParseMetadataAsValue(Value *&V, PerFunctionState &PFS);
391 bool ParseValueAsMetadata(Metadata *&MD, const Twine &TypeMsg,
392 PerFunctionState *PFS);
393 bool ParseMetadata(Metadata *&MD, PerFunctionState *PFS);
394 bool ParseMDTuple(MDNode *&MD, bool IsDistinct = false);
395 bool ParseMDNode(MDNode *&MD);
396 bool ParseMDNodeTail(MDNode *&MD);
397 bool ParseMDNodeVector(SmallVectorImpl<Metadata *> &MDs);
398 bool ParseMetadataAttachment(unsigned &Kind, MDNode *&MD);
399 bool ParseInstructionMetadata(Instruction &Inst);
400 bool ParseOptionalFunctionMetadata(Function &F);
402 template <class FieldTy>
403 bool ParseMDField(LocTy Loc, StringRef Name, FieldTy &Result);
404 template <class FieldTy> bool ParseMDField(StringRef Name, FieldTy &Result);
405 template <class ParserTy>
406 bool ParseMDFieldsImplBody(ParserTy parseField);
407 template <class ParserTy>
408 bool ParseMDFieldsImpl(ParserTy parseField, LocTy &ClosingLoc);
409 bool ParseSpecializedMDNode(MDNode *&N, bool IsDistinct = false);
411 #define HANDLE_SPECIALIZED_MDNODE_LEAF(CLASS) \
412 bool Parse##CLASS(MDNode *&Result, bool IsDistinct);
413 #include "llvm/IR/Metadata.def"
421 ArgInfo(LocTy L, Type *ty, AttributeSet Attr, const std::string &N)
422 : Loc(L), Ty(ty), Attrs(Attr), Name(N) {}
424 bool ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList, bool &isVarArg);
425 bool ParseFunctionHeader(Function *&Fn, bool isDefine);
426 bool ParseFunctionBody(Function &Fn);
427 bool ParseBasicBlock(PerFunctionState &PFS);
429 enum TailCallType { TCT_None, TCT_Tail, TCT_MustTail };
431 // Instruction Parsing. Each instruction parsing routine can return with a
432 // normal result, an error result, or return having eaten an extra comma.
433 enum InstResult { InstNormal = 0, InstError = 1, InstExtraComma = 2 };
434 int ParseInstruction(Instruction *&Inst, BasicBlock *BB,
435 PerFunctionState &PFS);
436 bool ParseCmpPredicate(unsigned &Pred, unsigned Opc);
438 bool ParseRet(Instruction *&Inst, BasicBlock *BB, PerFunctionState &PFS);
439 bool ParseBr(Instruction *&Inst, PerFunctionState &PFS);
440 bool ParseSwitch(Instruction *&Inst, PerFunctionState &PFS);
441 bool ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS);
442 bool ParseInvoke(Instruction *&Inst, PerFunctionState &PFS);
443 bool ParseResume(Instruction *&Inst, PerFunctionState &PFS);
445 bool ParseArithmetic(Instruction *&I, PerFunctionState &PFS, unsigned Opc,
446 unsigned OperandType);
447 bool ParseLogical(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
448 bool ParseCompare(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
449 bool ParseCast(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
450 bool ParseSelect(Instruction *&I, PerFunctionState &PFS);
451 bool ParseVA_Arg(Instruction *&I, PerFunctionState &PFS);
452 bool ParseExtractElement(Instruction *&I, PerFunctionState &PFS);
453 bool ParseInsertElement(Instruction *&I, PerFunctionState &PFS);
454 bool ParseShuffleVector(Instruction *&I, PerFunctionState &PFS);
455 int ParsePHI(Instruction *&I, PerFunctionState &PFS);
456 bool ParseLandingPad(Instruction *&I, PerFunctionState &PFS);
457 bool ParseCall(Instruction *&I, PerFunctionState &PFS,
458 CallInst::TailCallKind IsTail);
459 int ParseAlloc(Instruction *&I, PerFunctionState &PFS);
460 int ParseLoad(Instruction *&I, PerFunctionState &PFS);
461 int ParseStore(Instruction *&I, PerFunctionState &PFS);
462 int ParseCmpXchg(Instruction *&I, PerFunctionState &PFS);
463 int ParseAtomicRMW(Instruction *&I, PerFunctionState &PFS);
464 int ParseFence(Instruction *&I, PerFunctionState &PFS);
465 int ParseGetElementPtr(Instruction *&I, PerFunctionState &PFS);
466 int ParseExtractValue(Instruction *&I, PerFunctionState &PFS);
467 int ParseInsertValue(Instruction *&I, PerFunctionState &PFS);
469 // Use-list order directives.
470 bool ParseUseListOrder(PerFunctionState *PFS = nullptr);
471 bool ParseUseListOrderBB();
472 bool ParseUseListOrderIndexes(SmallVectorImpl<unsigned> &Indexes);
473 bool sortUseListOrder(Value *V, ArrayRef<unsigned> Indexes, SMLoc Loc);
475 } // End llvm namespace