1 //===-- LLParser.cpp - Parser Class ---------------------------------------===//
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 //===----------------------------------------------------------------------===//
15 #include "llvm/AutoUpgrade.h"
16 #include "llvm/CallingConv.h"
17 #include "llvm/Constants.h"
18 #include "llvm/DerivedTypes.h"
19 #include "llvm/InlineAsm.h"
20 #include "llvm/Instructions.h"
21 #include "llvm/LLVMContext.h"
22 #include "llvm/Metadata.h"
23 #include "llvm/Module.h"
24 #include "llvm/Operator.h"
25 #include "llvm/ValueSymbolTable.h"
26 #include "llvm/ADT/SmallPtrSet.h"
27 #include "llvm/ADT/StringExtras.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/Support/raw_ostream.h"
33 /// ValID - Represents a reference of a definition of some sort with no type.
34 /// There are several cases where we have to parse the value but where the
35 /// type can depend on later context. This may either be a numeric reference
36 /// or a symbolic (%var) reference. This is just a discriminated union.
39 t_LocalID, t_GlobalID, // ID in UIntVal.
40 t_LocalName, t_GlobalName, // Name in StrVal.
41 t_APSInt, t_APFloat, // Value in APSIntVal/APFloatVal.
42 t_Null, t_Undef, t_Zero, // No value.
43 t_EmptyArray, // No value: []
44 t_Constant, // Value in ConstantVal.
45 t_InlineAsm, // Value in StrVal/StrVal2/UIntVal.
46 t_Metadata // Value in MetadataVal.
51 std::string StrVal, StrVal2;
54 Constant *ConstantVal;
55 MetadataBase *MetadataVal;
56 ValID() : APFloatVal(0.0) {}
60 /// Run: module ::= toplevelentity*
61 bool LLParser::Run() {
65 return ParseTopLevelEntities() ||
66 ValidateEndOfModule();
69 /// ValidateEndOfModule - Do final validity and sanity checks at the end of the
71 bool LLParser::ValidateEndOfModule() {
72 // Update auto-upgraded malloc calls to "malloc".
73 // FIXME: Remove in LLVM 3.0.
75 MallocF->setName("malloc");
76 // If setName() does not set the name to "malloc", then there is already a
77 // declaration of "malloc". In that case, iterate over all calls to MallocF
78 // and get them to call the declared "malloc" instead.
79 if (MallocF->getName() != "malloc") {
80 Constant* RealMallocF = M->getFunction("malloc");
81 if (RealMallocF->getType() != MallocF->getType())
82 RealMallocF = ConstantExpr::getBitCast(RealMallocF, MallocF->getType());
83 MallocF->replaceAllUsesWith(RealMallocF);
84 MallocF->eraseFromParent();
89 if (!ForwardRefTypes.empty())
90 return Error(ForwardRefTypes.begin()->second.second,
91 "use of undefined type named '" +
92 ForwardRefTypes.begin()->first + "'");
93 if (!ForwardRefTypeIDs.empty())
94 return Error(ForwardRefTypeIDs.begin()->second.second,
95 "use of undefined type '%" +
96 utostr(ForwardRefTypeIDs.begin()->first) + "'");
98 if (!ForwardRefVals.empty())
99 return Error(ForwardRefVals.begin()->second.second,
100 "use of undefined value '@" + ForwardRefVals.begin()->first +
103 if (!ForwardRefValIDs.empty())
104 return Error(ForwardRefValIDs.begin()->second.second,
105 "use of undefined value '@" +
106 utostr(ForwardRefValIDs.begin()->first) + "'");
108 if (!ForwardRefMDNodes.empty())
109 return Error(ForwardRefMDNodes.begin()->second.second,
110 "use of undefined metadata '!" +
111 utostr(ForwardRefMDNodes.begin()->first) + "'");
114 // Look for intrinsic functions and CallInst that need to be upgraded
115 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; )
116 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove
118 // Check debug info intrinsics.
119 CheckDebugInfoIntrinsics(M);
123 //===----------------------------------------------------------------------===//
124 // Top-Level Entities
125 //===----------------------------------------------------------------------===//
127 bool LLParser::ParseTopLevelEntities() {
129 switch (Lex.getKind()) {
130 default: return TokError("expected top-level entity");
131 case lltok::Eof: return false;
132 //case lltok::kw_define:
133 case lltok::kw_declare: if (ParseDeclare()) return true; break;
134 case lltok::kw_define: if (ParseDefine()) return true; break;
135 case lltok::kw_module: if (ParseModuleAsm()) return true; break;
136 case lltok::kw_target: if (ParseTargetDefinition()) return true; break;
137 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break;
138 case lltok::kw_type: if (ParseUnnamedType()) return true; break;
139 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break;
140 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0
141 case lltok::LocalVar: if (ParseNamedType()) return true; break;
142 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break;
143 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break;
144 case lltok::Metadata: if (ParseStandaloneMetadata()) return true; break;
145 case lltok::NamedOrCustomMD: if (ParseNamedMetadata()) return true; break;
147 // The Global variable production with no name can have many different
148 // optional leading prefixes, the production is:
149 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal
150 // OptionalAddrSpace ('constant'|'global') ...
151 case lltok::kw_private : // OptionalLinkage
152 case lltok::kw_linker_private: // OptionalLinkage
153 case lltok::kw_internal: // OptionalLinkage
154 case lltok::kw_weak: // OptionalLinkage
155 case lltok::kw_weak_odr: // OptionalLinkage
156 case lltok::kw_linkonce: // OptionalLinkage
157 case lltok::kw_linkonce_odr: // OptionalLinkage
158 case lltok::kw_appending: // OptionalLinkage
159 case lltok::kw_dllexport: // OptionalLinkage
160 case lltok::kw_common: // OptionalLinkage
161 case lltok::kw_dllimport: // OptionalLinkage
162 case lltok::kw_extern_weak: // OptionalLinkage
163 case lltok::kw_external: { // OptionalLinkage
164 unsigned Linkage, Visibility;
165 if (ParseOptionalLinkage(Linkage) ||
166 ParseOptionalVisibility(Visibility) ||
167 ParseGlobal("", SMLoc(), Linkage, true, Visibility))
171 case lltok::kw_default: // OptionalVisibility
172 case lltok::kw_hidden: // OptionalVisibility
173 case lltok::kw_protected: { // OptionalVisibility
175 if (ParseOptionalVisibility(Visibility) ||
176 ParseGlobal("", SMLoc(), 0, false, Visibility))
181 case lltok::kw_thread_local: // OptionalThreadLocal
182 case lltok::kw_addrspace: // OptionalAddrSpace
183 case lltok::kw_constant: // GlobalType
184 case lltok::kw_global: // GlobalType
185 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true;
193 /// ::= 'module' 'asm' STRINGCONSTANT
194 bool LLParser::ParseModuleAsm() {
195 assert(Lex.getKind() == lltok::kw_module);
199 if (ParseToken(lltok::kw_asm, "expected 'module asm'") ||
200 ParseStringConstant(AsmStr)) return true;
202 const std::string &AsmSoFar = M->getModuleInlineAsm();
203 if (AsmSoFar.empty())
204 M->setModuleInlineAsm(AsmStr);
206 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr);
211 /// ::= 'target' 'triple' '=' STRINGCONSTANT
212 /// ::= 'target' 'datalayout' '=' STRINGCONSTANT
213 bool LLParser::ParseTargetDefinition() {
214 assert(Lex.getKind() == lltok::kw_target);
217 default: return TokError("unknown target property");
218 case lltok::kw_triple:
220 if (ParseToken(lltok::equal, "expected '=' after target triple") ||
221 ParseStringConstant(Str))
223 M->setTargetTriple(Str);
225 case lltok::kw_datalayout:
227 if (ParseToken(lltok::equal, "expected '=' after target datalayout") ||
228 ParseStringConstant(Str))
230 M->setDataLayout(Str);
236 /// ::= 'deplibs' '=' '[' ']'
237 /// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']'
238 bool LLParser::ParseDepLibs() {
239 assert(Lex.getKind() == lltok::kw_deplibs);
241 if (ParseToken(lltok::equal, "expected '=' after deplibs") ||
242 ParseToken(lltok::lsquare, "expected '=' after deplibs"))
245 if (EatIfPresent(lltok::rsquare))
249 if (ParseStringConstant(Str)) return true;
252 while (EatIfPresent(lltok::comma)) {
253 if (ParseStringConstant(Str)) return true;
257 return ParseToken(lltok::rsquare, "expected ']' at end of list");
260 /// ParseUnnamedType:
262 /// ::= LocalVarID '=' 'type' type
263 bool LLParser::ParseUnnamedType() {
264 unsigned TypeID = NumberedTypes.size();
266 // Handle the LocalVarID form.
267 if (Lex.getKind() == lltok::LocalVarID) {
268 if (Lex.getUIntVal() != TypeID)
269 return Error(Lex.getLoc(), "type expected to be numbered '%" +
270 utostr(TypeID) + "'");
271 Lex.Lex(); // eat LocalVarID;
273 if (ParseToken(lltok::equal, "expected '=' after name"))
277 assert(Lex.getKind() == lltok::kw_type);
278 LocTy TypeLoc = Lex.getLoc();
279 Lex.Lex(); // eat kw_type
281 PATypeHolder Ty(Type::getVoidTy(Context));
282 if (ParseType(Ty)) return true;
284 // See if this type was previously referenced.
285 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator
286 FI = ForwardRefTypeIDs.find(TypeID);
287 if (FI != ForwardRefTypeIDs.end()) {
288 if (FI->second.first.get() == Ty)
289 return Error(TypeLoc, "self referential type is invalid");
291 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty);
292 Ty = FI->second.first.get();
293 ForwardRefTypeIDs.erase(FI);
296 NumberedTypes.push_back(Ty);
302 /// ::= LocalVar '=' 'type' type
303 bool LLParser::ParseNamedType() {
304 std::string Name = Lex.getStrVal();
305 LocTy NameLoc = Lex.getLoc();
306 Lex.Lex(); // eat LocalVar.
308 PATypeHolder Ty(Type::getVoidTy(Context));
310 if (ParseToken(lltok::equal, "expected '=' after name") ||
311 ParseToken(lltok::kw_type, "expected 'type' after name") ||
315 // Set the type name, checking for conflicts as we do so.
316 bool AlreadyExists = M->addTypeName(Name, Ty);
317 if (!AlreadyExists) return false;
319 // See if this type is a forward reference. We need to eagerly resolve
320 // types to allow recursive type redefinitions below.
321 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator
322 FI = ForwardRefTypes.find(Name);
323 if (FI != ForwardRefTypes.end()) {
324 if (FI->second.first.get() == Ty)
325 return Error(NameLoc, "self referential type is invalid");
327 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty);
328 Ty = FI->second.first.get();
329 ForwardRefTypes.erase(FI);
332 // Inserting a name that is already defined, get the existing name.
333 const Type *Existing = M->getTypeByName(Name);
334 assert(Existing && "Conflict but no matching type?!");
336 // Otherwise, this is an attempt to redefine a type. That's okay if
337 // the redefinition is identical to the original.
338 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0
339 if (Existing == Ty) return false;
341 // Any other kind of (non-equivalent) redefinition is an error.
342 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" +
343 Ty->getDescription() + "'");
348 /// ::= 'declare' FunctionHeader
349 bool LLParser::ParseDeclare() {
350 assert(Lex.getKind() == lltok::kw_declare);
354 return ParseFunctionHeader(F, false);
358 /// ::= 'define' FunctionHeader '{' ...
359 bool LLParser::ParseDefine() {
360 assert(Lex.getKind() == lltok::kw_define);
364 return ParseFunctionHeader(F, true) ||
365 ParseFunctionBody(*F);
371 bool LLParser::ParseGlobalType(bool &IsConstant) {
372 if (Lex.getKind() == lltok::kw_constant)
374 else if (Lex.getKind() == lltok::kw_global)
378 return TokError("expected 'global' or 'constant'");
384 /// ParseUnnamedGlobal:
385 /// OptionalVisibility ALIAS ...
386 /// OptionalLinkage OptionalVisibility ... -> global variable
387 /// GlobalID '=' OptionalVisibility ALIAS ...
388 /// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable
389 bool LLParser::ParseUnnamedGlobal() {
390 unsigned VarID = NumberedVals.size();
392 LocTy NameLoc = Lex.getLoc();
394 // Handle the GlobalID form.
395 if (Lex.getKind() == lltok::GlobalID) {
396 if (Lex.getUIntVal() != VarID)
397 return Error(Lex.getLoc(), "variable expected to be numbered '%" +
398 utostr(VarID) + "'");
399 Lex.Lex(); // eat GlobalID;
401 if (ParseToken(lltok::equal, "expected '=' after name"))
406 unsigned Linkage, Visibility;
407 if (ParseOptionalLinkage(Linkage, HasLinkage) ||
408 ParseOptionalVisibility(Visibility))
411 if (HasLinkage || Lex.getKind() != lltok::kw_alias)
412 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility);
413 return ParseAlias(Name, NameLoc, Visibility);
416 /// ParseNamedGlobal:
417 /// GlobalVar '=' OptionalVisibility ALIAS ...
418 /// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable
419 bool LLParser::ParseNamedGlobal() {
420 assert(Lex.getKind() == lltok::GlobalVar);
421 LocTy NameLoc = Lex.getLoc();
422 std::string Name = Lex.getStrVal();
426 unsigned Linkage, Visibility;
427 if (ParseToken(lltok::equal, "expected '=' in global variable") ||
428 ParseOptionalLinkage(Linkage, HasLinkage) ||
429 ParseOptionalVisibility(Visibility))
432 if (HasLinkage || Lex.getKind() != lltok::kw_alias)
433 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility);
434 return ParseAlias(Name, NameLoc, Visibility);
438 // ::= '!' STRINGCONSTANT
439 bool LLParser::ParseMDString(MetadataBase *&MDS) {
441 if (ParseStringConstant(Str)) return true;
442 MDS = MDString::get(Context, Str);
447 // ::= '!' MDNodeNumber
448 bool LLParser::ParseMDNode(MetadataBase *&Node) {
449 // !{ ..., !42, ... }
451 if (ParseUInt32(MID)) return true;
453 // Check existing MDNode.
454 std::map<unsigned, MetadataBase *>::iterator I = MetadataCache.find(MID);
455 if (I != MetadataCache.end()) {
460 // Check known forward references.
461 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator
462 FI = ForwardRefMDNodes.find(MID);
463 if (FI != ForwardRefMDNodes.end()) {
464 Node = FI->second.first;
468 // Create MDNode forward reference
469 SmallVector<Value *, 1> Elts;
470 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID);
471 Elts.push_back(MDString::get(Context, FwdRefName));
472 MDNode *FwdNode = MDNode::get(Context, Elts.data(), Elts.size());
473 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc());
478 ///ParseNamedMetadata:
479 /// !foo = !{ !1, !2 }
480 bool LLParser::ParseNamedMetadata() {
481 assert(Lex.getKind() == lltok::NamedOrCustomMD);
483 std::string Name = Lex.getStrVal();
485 if (ParseToken(lltok::equal, "expected '=' here"))
488 if (Lex.getKind() != lltok::Metadata)
489 return TokError("Expected '!' here");
492 if (Lex.getKind() != lltok::lbrace)
493 return TokError("Expected '{' here");
495 SmallVector<MetadataBase *, 8> Elts;
497 if (Lex.getKind() != lltok::Metadata)
498 return TokError("Expected '!' here");
501 if (ParseMDNode(N)) return true;
503 } while (EatIfPresent(lltok::comma));
505 if (ParseToken(lltok::rbrace, "expected end of metadata node"))
508 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M);
512 /// ParseStandaloneMetadata:
514 bool LLParser::ParseStandaloneMetadata() {
515 assert(Lex.getKind() == lltok::Metadata);
517 unsigned MetadataID = 0;
518 if (ParseUInt32(MetadataID))
520 if (MetadataCache.find(MetadataID) != MetadataCache.end())
521 return TokError("Metadata id is already used");
522 if (ParseToken(lltok::equal, "expected '=' here"))
526 PATypeHolder Ty(Type::getVoidTy(Context));
527 if (ParseType(Ty, TyLoc))
530 if (Lex.getKind() != lltok::Metadata)
531 return TokError("Expected metadata here");
534 if (Lex.getKind() != lltok::lbrace)
535 return TokError("Expected '{' here");
537 SmallVector<Value *, 16> Elts;
538 if (ParseMDNodeVector(Elts)
539 || ParseToken(lltok::rbrace, "expected end of metadata node"))
542 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size());
543 MetadataCache[MetadataID] = Init;
544 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator
545 FI = ForwardRefMDNodes.find(MetadataID);
546 if (FI != ForwardRefMDNodes.end()) {
547 MDNode *FwdNode = cast<MDNode>(FI->second.first);
548 FwdNode->replaceAllUsesWith(Init);
549 ForwardRefMDNodes.erase(FI);
556 /// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee
559 /// ::= 'bitcast' '(' TypeAndValue 'to' Type ')'
560 /// ::= 'getelementptr' 'inbounds'? '(' ... ')'
562 /// Everything through visibility has already been parsed.
564 bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc,
565 unsigned Visibility) {
566 assert(Lex.getKind() == lltok::kw_alias);
569 LocTy LinkageLoc = Lex.getLoc();
570 if (ParseOptionalLinkage(Linkage))
573 if (Linkage != GlobalValue::ExternalLinkage &&
574 Linkage != GlobalValue::WeakAnyLinkage &&
575 Linkage != GlobalValue::WeakODRLinkage &&
576 Linkage != GlobalValue::InternalLinkage &&
577 Linkage != GlobalValue::PrivateLinkage &&
578 Linkage != GlobalValue::LinkerPrivateLinkage)
579 return Error(LinkageLoc, "invalid linkage type for alias");
582 LocTy AliaseeLoc = Lex.getLoc();
583 if (Lex.getKind() != lltok::kw_bitcast &&
584 Lex.getKind() != lltok::kw_getelementptr) {
585 if (ParseGlobalTypeAndValue(Aliasee)) return true;
587 // The bitcast dest type is not present, it is implied by the dest type.
589 if (ParseValID(ID)) return true;
590 if (ID.Kind != ValID::t_Constant)
591 return Error(AliaseeLoc, "invalid aliasee");
592 Aliasee = ID.ConstantVal;
595 if (!isa<PointerType>(Aliasee->getType()))
596 return Error(AliaseeLoc, "alias must have pointer type");
598 // Okay, create the alias but do not insert it into the module yet.
599 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(),
600 (GlobalValue::LinkageTypes)Linkage, Name,
602 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility);
604 // See if this value already exists in the symbol table. If so, it is either
605 // a redefinition or a definition of a forward reference.
606 if (GlobalValue *Val =
607 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name))) {
608 // See if this was a redefinition. If so, there is no entry in
610 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator
611 I = ForwardRefVals.find(Name);
612 if (I == ForwardRefVals.end())
613 return Error(NameLoc, "redefinition of global named '@" + Name + "'");
615 // Otherwise, this was a definition of forward ref. Verify that types
617 if (Val->getType() != GA->getType())
618 return Error(NameLoc,
619 "forward reference and definition of alias have different types");
621 // If they agree, just RAUW the old value with the alias and remove the
623 Val->replaceAllUsesWith(GA);
624 Val->eraseFromParent();
625 ForwardRefVals.erase(I);
628 // Insert into the module, we know its name won't collide now.
629 M->getAliasList().push_back(GA);
630 assert(GA->getNameStr() == Name && "Should not be a name conflict!");
636 /// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal
637 /// OptionalAddrSpace GlobalType Type Const
638 /// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal
639 /// OptionalAddrSpace GlobalType Type Const
641 /// Everything through visibility has been parsed already.
643 bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc,
644 unsigned Linkage, bool HasLinkage,
645 unsigned Visibility) {
647 bool ThreadLocal, IsConstant;
650 PATypeHolder Ty(Type::getVoidTy(Context));
651 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) ||
652 ParseOptionalAddrSpace(AddrSpace) ||
653 ParseGlobalType(IsConstant) ||
654 ParseType(Ty, TyLoc))
657 // If the linkage is specified and is external, then no initializer is
660 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage &&
661 Linkage != GlobalValue::ExternalWeakLinkage &&
662 Linkage != GlobalValue::ExternalLinkage)) {
663 if (ParseGlobalValue(Ty, Init))
667 if (isa<FunctionType>(Ty) || Ty->isLabelTy())
668 return Error(TyLoc, "invalid type for global variable");
670 GlobalVariable *GV = 0;
672 // See if the global was forward referenced, if so, use the global.
674 if ((GV = M->getGlobalVariable(Name, true)) &&
675 !ForwardRefVals.erase(Name))
676 return Error(NameLoc, "redefinition of global '@" + Name + "'");
678 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator
679 I = ForwardRefValIDs.find(NumberedVals.size());
680 if (I != ForwardRefValIDs.end()) {
681 GV = cast<GlobalVariable>(I->second.first);
682 ForwardRefValIDs.erase(I);
687 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0,
688 Name, 0, false, AddrSpace);
690 if (GV->getType()->getElementType() != Ty)
692 "forward reference and definition of global have different types");
694 // Move the forward-reference to the correct spot in the module.
695 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV);
699 NumberedVals.push_back(GV);
701 // Set the parsed properties on the global.
703 GV->setInitializer(Init);
704 GV->setConstant(IsConstant);
705 GV->setLinkage((GlobalValue::LinkageTypes)Linkage);
706 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility);
707 GV->setThreadLocal(ThreadLocal);
709 // Parse attributes on the global.
710 while (Lex.getKind() == lltok::comma) {
713 if (Lex.getKind() == lltok::kw_section) {
715 GV->setSection(Lex.getStrVal());
716 if (ParseToken(lltok::StringConstant, "expected global section string"))
718 } else if (Lex.getKind() == lltok::kw_align) {
720 if (ParseOptionalAlignment(Alignment)) return true;
721 GV->setAlignment(Alignment);
723 TokError("unknown global variable property!");
731 //===----------------------------------------------------------------------===//
732 // GlobalValue Reference/Resolution Routines.
733 //===----------------------------------------------------------------------===//
735 /// GetGlobalVal - Get a value with the specified name or ID, creating a
736 /// forward reference record if needed. This can return null if the value
737 /// exists but does not have the right type.
738 GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty,
740 const PointerType *PTy = dyn_cast<PointerType>(Ty);
742 Error(Loc, "global variable reference must have pointer type");
746 // Look this name up in the normal function symbol table.
748 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name));
750 // If this is a forward reference for the value, see if we already created a
751 // forward ref record.
753 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator
754 I = ForwardRefVals.find(Name);
755 if (I != ForwardRefVals.end())
756 Val = I->second.first;
759 // If we have the value in the symbol table or fwd-ref table, return it.
761 if (Val->getType() == Ty) return Val;
762 Error(Loc, "'@" + Name + "' defined with type '" +
763 Val->getType()->getDescription() + "'");
767 // Otherwise, create a new forward reference for this value and remember it.
769 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) {
770 // Function types can return opaque but functions can't.
771 if (isa<OpaqueType>(FT->getReturnType())) {
772 Error(Loc, "function may not return opaque type");
776 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M);
778 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false,
779 GlobalValue::ExternalWeakLinkage, 0, Name);
782 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
786 GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) {
787 const PointerType *PTy = dyn_cast<PointerType>(Ty);
789 Error(Loc, "global variable reference must have pointer type");
793 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0;
795 // If this is a forward reference for the value, see if we already created a
796 // forward ref record.
798 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator
799 I = ForwardRefValIDs.find(ID);
800 if (I != ForwardRefValIDs.end())
801 Val = I->second.first;
804 // If we have the value in the symbol table or fwd-ref table, return it.
806 if (Val->getType() == Ty) return Val;
807 Error(Loc, "'@" + utostr(ID) + "' defined with type '" +
808 Val->getType()->getDescription() + "'");
812 // Otherwise, create a new forward reference for this value and remember it.
814 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) {
815 // Function types can return opaque but functions can't.
816 if (isa<OpaqueType>(FT->getReturnType())) {
817 Error(Loc, "function may not return opaque type");
820 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M);
822 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false,
823 GlobalValue::ExternalWeakLinkage, 0, "");
826 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc);
831 //===----------------------------------------------------------------------===//
833 //===----------------------------------------------------------------------===//
835 /// ParseToken - If the current token has the specified kind, eat it and return
836 /// success. Otherwise, emit the specified error and return failure.
837 bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) {
838 if (Lex.getKind() != T)
839 return TokError(ErrMsg);
844 /// ParseStringConstant
845 /// ::= StringConstant
846 bool LLParser::ParseStringConstant(std::string &Result) {
847 if (Lex.getKind() != lltok::StringConstant)
848 return TokError("expected string constant");
849 Result = Lex.getStrVal();
856 bool LLParser::ParseUInt32(unsigned &Val) {
857 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
858 return TokError("expected integer");
859 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1);
860 if (Val64 != unsigned(Val64))
861 return TokError("expected 32-bit integer (too large)");
868 /// ParseOptionalAddrSpace
870 /// := 'addrspace' '(' uint32 ')'
871 bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) {
873 if (!EatIfPresent(lltok::kw_addrspace))
875 return ParseToken(lltok::lparen, "expected '(' in address space") ||
876 ParseUInt32(AddrSpace) ||
877 ParseToken(lltok::rparen, "expected ')' in address space");
880 /// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind
881 /// indicates what kind of attribute list this is: 0: function arg, 1: result,
882 /// 2: function attr.
883 /// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0
884 bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) {
885 Attrs = Attribute::None;
886 LocTy AttrLoc = Lex.getLoc();
889 switch (Lex.getKind()) {
892 // Treat these as signext/zeroext if they occur in the argument list after
893 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the
894 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant
896 // FIXME: REMOVE THIS IN LLVM 3.0
898 if (Lex.getKind() == lltok::kw_sext)
899 Attrs |= Attribute::SExt;
901 Attrs |= Attribute::ZExt;
905 default: // End of attributes.
906 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly))
907 return Error(AttrLoc, "invalid use of function-only attribute");
909 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly))
910 return Error(AttrLoc, "invalid use of parameter-only attribute");
913 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break;
914 case lltok::kw_signext: Attrs |= Attribute::SExt; break;
915 case lltok::kw_inreg: Attrs |= Attribute::InReg; break;
916 case lltok::kw_sret: Attrs |= Attribute::StructRet; break;
917 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break;
918 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break;
919 case lltok::kw_byval: Attrs |= Attribute::ByVal; break;
920 case lltok::kw_nest: Attrs |= Attribute::Nest; break;
922 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break;
923 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break;
924 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break;
925 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break;
926 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break;
927 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break;
928 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break;
929 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break;
930 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break;
931 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break;
932 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break;
933 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break;
934 case lltok::kw_naked: Attrs |= Attribute::Naked; break;
936 case lltok::kw_align: {
938 if (ParseOptionalAlignment(Alignment))
940 Attrs |= Attribute::constructAlignmentFromInt(Alignment);
948 /// ParseOptionalLinkage
951 /// ::= 'linker_private'
956 /// ::= 'linkonce_odr'
961 /// ::= 'extern_weak'
963 bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) {
965 switch (Lex.getKind()) {
966 default: Res=GlobalValue::ExternalLinkage; return false;
967 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break;
968 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break;
969 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break;
970 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break;
971 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break;
972 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break;
973 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break;
974 case lltok::kw_available_externally:
975 Res = GlobalValue::AvailableExternallyLinkage;
977 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break;
978 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break;
979 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break;
980 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break;
981 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break;
982 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break;
989 /// ParseOptionalVisibility
995 bool LLParser::ParseOptionalVisibility(unsigned &Res) {
996 switch (Lex.getKind()) {
997 default: Res = GlobalValue::DefaultVisibility; return false;
998 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break;
999 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break;
1000 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break;
1006 /// ParseOptionalCallingConv
1011 /// ::= 'x86_stdcallcc'
1012 /// ::= 'x86_fastcallcc'
1013 /// ::= 'arm_apcscc'
1014 /// ::= 'arm_aapcscc'
1015 /// ::= 'arm_aapcs_vfpcc'
1018 bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) {
1019 switch (Lex.getKind()) {
1020 default: CC = CallingConv::C; return false;
1021 case lltok::kw_ccc: CC = CallingConv::C; break;
1022 case lltok::kw_fastcc: CC = CallingConv::Fast; break;
1023 case lltok::kw_coldcc: CC = CallingConv::Cold; break;
1024 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break;
1025 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break;
1026 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break;
1027 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break;
1028 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break;
1029 case lltok::kw_cc: {
1030 unsigned ArbitraryCC;
1032 if (ParseUInt32(ArbitraryCC)) {
1035 CC = static_cast<CallingConv::ID>(ArbitraryCC);
1045 /// ParseOptionalCustomMetadata
1048 bool LLParser::ParseOptionalCustomMetadata() {
1049 if (Lex.getKind() != lltok::NamedOrCustomMD)
1052 std::string Name = Lex.getStrVal();
1055 if (Lex.getKind() != lltok::Metadata)
1056 return TokError("Expected '!' here");
1060 if (ParseMDNode(Node)) return true;
1062 MetadataContext &TheMetadata = M->getContext().getMetadata();
1063 unsigned MDK = TheMetadata.getMDKind(Name.c_str());
1065 MDK = TheMetadata.registerMDKind(Name.c_str());
1066 MDsOnInst.push_back(std::make_pair(MDK, cast<MDNode>(Node)));
1071 /// ParseOptionalAlignment
1074 bool LLParser::ParseOptionalAlignment(unsigned &Alignment) {
1076 if (!EatIfPresent(lltok::kw_align))
1078 LocTy AlignLoc = Lex.getLoc();
1079 if (ParseUInt32(Alignment)) return true;
1080 if (!isPowerOf2_32(Alignment))
1081 return Error(AlignLoc, "alignment is not a power of two");
1085 /// ParseOptionalInfo
1086 /// ::= OptionalInfo (',' OptionalInfo)+
1087 bool LLParser::ParseOptionalInfo(unsigned &Alignment) {
1089 // FIXME: Handle customized metadata info attached with an instruction.
1091 if (Lex.getKind() == lltok::NamedOrCustomMD) {
1092 if (ParseOptionalCustomMetadata()) return true;
1093 } else if (Lex.getKind() == lltok::kw_align) {
1094 if (ParseOptionalAlignment(Alignment)) return true;
1097 } while (EatIfPresent(lltok::comma));
1104 /// ::= (',' uint32)+
1105 bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices) {
1106 if (Lex.getKind() != lltok::comma)
1107 return TokError("expected ',' as start of index list");
1109 while (EatIfPresent(lltok::comma)) {
1111 if (ParseUInt32(Idx)) return true;
1112 Indices.push_back(Idx);
1118 //===----------------------------------------------------------------------===//
1120 //===----------------------------------------------------------------------===//
1122 /// ParseType - Parse and resolve a full type.
1123 bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) {
1124 LocTy TypeLoc = Lex.getLoc();
1125 if (ParseTypeRec(Result)) return true;
1127 // Verify no unresolved uprefs.
1128 if (!UpRefs.empty())
1129 return Error(UpRefs.back().Loc, "invalid unresolved type up reference");
1131 if (!AllowVoid && Result.get()->isVoidTy())
1132 return Error(TypeLoc, "void type only allowed for function results");
1137 /// HandleUpRefs - Every time we finish a new layer of types, this function is
1138 /// called. It loops through the UpRefs vector, which is a list of the
1139 /// currently active types. For each type, if the up-reference is contained in
1140 /// the newly completed type, we decrement the level count. When the level
1141 /// count reaches zero, the up-referenced type is the type that is passed in:
1142 /// thus we can complete the cycle.
1144 PATypeHolder LLParser::HandleUpRefs(const Type *ty) {
1145 // If Ty isn't abstract, or if there are no up-references in it, then there is
1146 // nothing to resolve here.
1147 if (!ty->isAbstract() || UpRefs.empty()) return ty;
1149 PATypeHolder Ty(ty);
1151 errs() << "Type '" << Ty->getDescription()
1152 << "' newly formed. Resolving upreferences.\n"
1153 << UpRefs.size() << " upreferences active!\n";
1156 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes
1157 // to zero), we resolve them all together before we resolve them to Ty. At
1158 // the end of the loop, if there is anything to resolve to Ty, it will be in
1160 OpaqueType *TypeToResolve = 0;
1162 for (unsigned i = 0; i != UpRefs.size(); ++i) {
1163 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'.
1165 std::find(Ty->subtype_begin(), Ty->subtype_end(),
1166 UpRefs[i].LastContainedTy) != Ty->subtype_end();
1169 errs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", "
1170 << UpRefs[i].LastContainedTy->getDescription() << ") = "
1171 << (ContainsType ? "true" : "false")
1172 << " level=" << UpRefs[i].NestingLevel << "\n";
1177 // Decrement level of upreference
1178 unsigned Level = --UpRefs[i].NestingLevel;
1179 UpRefs[i].LastContainedTy = Ty;
1181 // If the Up-reference has a non-zero level, it shouldn't be resolved yet.
1186 errs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n";
1189 TypeToResolve = UpRefs[i].UpRefTy;
1191 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve);
1192 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list.
1193 --i; // Do not skip the next element.
1197 TypeToResolve->refineAbstractTypeTo(Ty);
1203 /// ParseTypeRec - The recursive function used to process the internal
1204 /// implementation details of types.
1205 bool LLParser::ParseTypeRec(PATypeHolder &Result) {
1206 switch (Lex.getKind()) {
1208 return TokError("expected type");
1210 // TypeRec ::= 'float' | 'void' (etc)
1211 Result = Lex.getTyVal();
1214 case lltok::kw_opaque:
1215 // TypeRec ::= 'opaque'
1216 Result = OpaqueType::get(Context);
1220 // TypeRec ::= '{' ... '}'
1221 if (ParseStructType(Result, false))
1224 case lltok::lsquare:
1225 // TypeRec ::= '[' ... ']'
1226 Lex.Lex(); // eat the lsquare.
1227 if (ParseArrayVectorType(Result, false))
1230 case lltok::less: // Either vector or packed struct.
1231 // TypeRec ::= '<' ... '>'
1233 if (Lex.getKind() == lltok::lbrace) {
1234 if (ParseStructType(Result, true) ||
1235 ParseToken(lltok::greater, "expected '>' at end of packed struct"))
1237 } else if (ParseArrayVectorType(Result, true))
1240 case lltok::LocalVar:
1241 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0
1243 if (const Type *T = M->getTypeByName(Lex.getStrVal())) {
1246 Result = OpaqueType::get(Context);
1247 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(),
1248 std::make_pair(Result,
1250 M->addTypeName(Lex.getStrVal(), Result.get());
1255 case lltok::LocalVarID:
1257 if (Lex.getUIntVal() < NumberedTypes.size())
1258 Result = NumberedTypes[Lex.getUIntVal()];
1260 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator
1261 I = ForwardRefTypeIDs.find(Lex.getUIntVal());
1262 if (I != ForwardRefTypeIDs.end())
1263 Result = I->second.first;
1265 Result = OpaqueType::get(Context);
1266 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(),
1267 std::make_pair(Result,
1273 case lltok::backslash: {
1274 // TypeRec ::= '\' 4
1277 if (ParseUInt32(Val)) return true;
1278 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder.
1279 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT));
1285 // Parse the type suffixes.
1287 switch (Lex.getKind()) {
1289 default: return false;
1291 // TypeRec ::= TypeRec '*'
1293 if (Result.get()->isLabelTy())
1294 return TokError("basic block pointers are invalid");
1295 if (Result.get()->isVoidTy())
1296 return TokError("pointers to void are invalid; use i8* instead");
1297 if (!PointerType::isValidElementType(Result.get()))
1298 return TokError("pointer to this type is invalid");
1299 Result = HandleUpRefs(PointerType::getUnqual(Result.get()));
1303 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*'
1304 case lltok::kw_addrspace: {
1305 if (Result.get()->isLabelTy())
1306 return TokError("basic block pointers are invalid");
1307 if (Result.get()->isVoidTy())
1308 return TokError("pointers to void are invalid; use i8* instead");
1309 if (!PointerType::isValidElementType(Result.get()))
1310 return TokError("pointer to this type is invalid");
1312 if (ParseOptionalAddrSpace(AddrSpace) ||
1313 ParseToken(lltok::star, "expected '*' in address space"))
1316 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace));
1320 /// Types '(' ArgTypeListI ')' OptFuncAttrs
1322 if (ParseFunctionType(Result))
1329 /// ParseParameterList
1331 /// ::= '(' Arg (',' Arg)* ')'
1333 /// ::= Type OptionalAttributes Value OptionalAttributes
1334 bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
1335 PerFunctionState &PFS) {
1336 if (ParseToken(lltok::lparen, "expected '(' in call"))
1339 while (Lex.getKind() != lltok::rparen) {
1340 // If this isn't the first argument, we need a comma.
1341 if (!ArgList.empty() &&
1342 ParseToken(lltok::comma, "expected ',' in argument list"))
1345 // Parse the argument.
1347 PATypeHolder ArgTy(Type::getVoidTy(Context));
1348 unsigned ArgAttrs1, ArgAttrs2;
1350 if (ParseType(ArgTy, ArgLoc) ||
1351 ParseOptionalAttrs(ArgAttrs1, 0) ||
1352 ParseValue(ArgTy, V, PFS) ||
1353 // FIXME: Should not allow attributes after the argument, remove this in
1355 ParseOptionalAttrs(ArgAttrs2, 3))
1357 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2));
1360 Lex.Lex(); // Lex the ')'.
1366 /// ParseArgumentList - Parse the argument list for a function type or function
1367 /// prototype. If 'inType' is true then we are parsing a FunctionType.
1368 /// ::= '(' ArgTypeListI ')'
1372 /// ::= ArgTypeList ',' '...'
1373 /// ::= ArgType (',' ArgType)*
1375 bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList,
1376 bool &isVarArg, bool inType) {
1378 assert(Lex.getKind() == lltok::lparen);
1379 Lex.Lex(); // eat the (.
1381 if (Lex.getKind() == lltok::rparen) {
1383 } else if (Lex.getKind() == lltok::dotdotdot) {
1387 LocTy TypeLoc = Lex.getLoc();
1388 PATypeHolder ArgTy(Type::getVoidTy(Context));
1392 // If we're parsing a type, use ParseTypeRec, because we allow recursive
1393 // types (such as a function returning a pointer to itself). If parsing a
1394 // function prototype, we require fully resolved types.
1395 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) ||
1396 ParseOptionalAttrs(Attrs, 0)) return true;
1398 if (ArgTy->isVoidTy())
1399 return Error(TypeLoc, "argument can not have void type");
1401 if (Lex.getKind() == lltok::LocalVar ||
1402 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0
1403 Name = Lex.getStrVal();
1407 if (!FunctionType::isValidArgumentType(ArgTy))
1408 return Error(TypeLoc, "invalid type for function argument");
1410 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name));
1412 while (EatIfPresent(lltok::comma)) {
1413 // Handle ... at end of arg list.
1414 if (EatIfPresent(lltok::dotdotdot)) {
1419 // Otherwise must be an argument type.
1420 TypeLoc = Lex.getLoc();
1421 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) ||
1422 ParseOptionalAttrs(Attrs, 0)) return true;
1424 if (ArgTy->isVoidTy())
1425 return Error(TypeLoc, "argument can not have void type");
1427 if (Lex.getKind() == lltok::LocalVar ||
1428 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0
1429 Name = Lex.getStrVal();
1435 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy))
1436 return Error(TypeLoc, "invalid type for function argument");
1438 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name));
1442 return ParseToken(lltok::rparen, "expected ')' at end of argument list");
1445 /// ParseFunctionType
1446 /// ::= Type ArgumentList OptionalAttrs
1447 bool LLParser::ParseFunctionType(PATypeHolder &Result) {
1448 assert(Lex.getKind() == lltok::lparen);
1450 if (!FunctionType::isValidReturnType(Result))
1451 return TokError("invalid function return type");
1453 std::vector<ArgInfo> ArgList;
1456 if (ParseArgumentList(ArgList, isVarArg, true) ||
1457 // FIXME: Allow, but ignore attributes on function types!
1458 // FIXME: Remove in LLVM 3.0
1459 ParseOptionalAttrs(Attrs, 2))
1462 // Reject names on the arguments lists.
1463 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
1464 if (!ArgList[i].Name.empty())
1465 return Error(ArgList[i].Loc, "argument name invalid in function type");
1466 if (!ArgList[i].Attrs != 0) {
1467 // Allow but ignore attributes on function types; this permits
1469 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0
1473 std::vector<const Type*> ArgListTy;
1474 for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
1475 ArgListTy.push_back(ArgList[i].Type);
1477 Result = HandleUpRefs(FunctionType::get(Result.get(),
1478 ArgListTy, isVarArg));
1482 /// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere.
1485 /// ::= '{' TypeRec (',' TypeRec)* '}'
1486 /// ::= '<' '{' '}' '>'
1487 /// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>'
1488 bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) {
1489 assert(Lex.getKind() == lltok::lbrace);
1490 Lex.Lex(); // Consume the '{'
1492 if (EatIfPresent(lltok::rbrace)) {
1493 Result = StructType::get(Context, Packed);
1497 std::vector<PATypeHolder> ParamsList;
1498 LocTy EltTyLoc = Lex.getLoc();
1499 if (ParseTypeRec(Result)) return true;
1500 ParamsList.push_back(Result);
1502 if (Result->isVoidTy())
1503 return Error(EltTyLoc, "struct element can not have void type");
1504 if (!StructType::isValidElementType(Result))
1505 return Error(EltTyLoc, "invalid element type for struct");
1507 while (EatIfPresent(lltok::comma)) {
1508 EltTyLoc = Lex.getLoc();
1509 if (ParseTypeRec(Result)) return true;
1511 if (Result->isVoidTy())
1512 return Error(EltTyLoc, "struct element can not have void type");
1513 if (!StructType::isValidElementType(Result))
1514 return Error(EltTyLoc, "invalid element type for struct");
1516 ParamsList.push_back(Result);
1519 if (ParseToken(lltok::rbrace, "expected '}' at end of struct"))
1522 std::vector<const Type*> ParamsListTy;
1523 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i)
1524 ParamsListTy.push_back(ParamsList[i].get());
1525 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed));
1529 /// ParseArrayVectorType - Parse an array or vector type, assuming the first
1530 /// token has already been consumed.
1532 /// ::= '[' APSINTVAL 'x' Types ']'
1533 /// ::= '<' APSINTVAL 'x' Types '>'
1534 bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) {
1535 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() ||
1536 Lex.getAPSIntVal().getBitWidth() > 64)
1537 return TokError("expected number in address space");
1539 LocTy SizeLoc = Lex.getLoc();
1540 uint64_t Size = Lex.getAPSIntVal().getZExtValue();
1543 if (ParseToken(lltok::kw_x, "expected 'x' after element count"))
1546 LocTy TypeLoc = Lex.getLoc();
1547 PATypeHolder EltTy(Type::getVoidTy(Context));
1548 if (ParseTypeRec(EltTy)) return true;
1550 if (EltTy->isVoidTy())
1551 return Error(TypeLoc, "array and vector element type cannot be void");
1553 if (ParseToken(isVector ? lltok::greater : lltok::rsquare,
1554 "expected end of sequential type"))
1559 return Error(SizeLoc, "zero element vector is illegal");
1560 if ((unsigned)Size != Size)
1561 return Error(SizeLoc, "size too large for vector");
1562 if (!VectorType::isValidElementType(EltTy))
1563 return Error(TypeLoc, "vector element type must be fp or integer");
1564 Result = VectorType::get(EltTy, unsigned(Size));
1566 if (!ArrayType::isValidElementType(EltTy))
1567 return Error(TypeLoc, "invalid array element type");
1568 Result = HandleUpRefs(ArrayType::get(EltTy, Size));
1573 //===----------------------------------------------------------------------===//
1574 // Function Semantic Analysis.
1575 //===----------------------------------------------------------------------===//
1577 LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f)
1580 // Insert unnamed arguments into the NumberedVals list.
1581 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end();
1584 NumberedVals.push_back(AI);
1587 LLParser::PerFunctionState::~PerFunctionState() {
1588 // If there were any forward referenced non-basicblock values, delete them.
1589 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator
1590 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I)
1591 if (!isa<BasicBlock>(I->second.first)) {
1592 I->second.first->replaceAllUsesWith(
1593 UndefValue::get(I->second.first->getType()));
1594 delete I->second.first;
1595 I->second.first = 0;
1598 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator
1599 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I)
1600 if (!isa<BasicBlock>(I->second.first)) {
1601 I->second.first->replaceAllUsesWith(
1602 UndefValue::get(I->second.first->getType()));
1603 delete I->second.first;
1604 I->second.first = 0;
1608 bool LLParser::PerFunctionState::VerifyFunctionComplete() {
1609 if (!ForwardRefVals.empty())
1610 return P.Error(ForwardRefVals.begin()->second.second,
1611 "use of undefined value '%" + ForwardRefVals.begin()->first +
1613 if (!ForwardRefValIDs.empty())
1614 return P.Error(ForwardRefValIDs.begin()->second.second,
1615 "use of undefined value '%" +
1616 utostr(ForwardRefValIDs.begin()->first) + "'");
1621 /// GetVal - Get a value with the specified name or ID, creating a
1622 /// forward reference record if needed. This can return null if the value
1623 /// exists but does not have the right type.
1624 Value *LLParser::PerFunctionState::GetVal(const std::string &Name,
1625 const Type *Ty, LocTy Loc) {
1626 // Look this name up in the normal function symbol table.
1627 Value *Val = F.getValueSymbolTable().lookup(Name);
1629 // If this is a forward reference for the value, see if we already created a
1630 // forward ref record.
1632 std::map<std::string, std::pair<Value*, LocTy> >::iterator
1633 I = ForwardRefVals.find(Name);
1634 if (I != ForwardRefVals.end())
1635 Val = I->second.first;
1638 // If we have the value in the symbol table or fwd-ref table, return it.
1640 if (Val->getType() == Ty) return Val;
1641 if (Ty->isLabelTy())
1642 P.Error(Loc, "'%" + Name + "' is not a basic block");
1644 P.Error(Loc, "'%" + Name + "' defined with type '" +
1645 Val->getType()->getDescription() + "'");
1649 // Don't make placeholders with invalid type.
1650 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) &&
1651 Ty != Type::getLabelTy(F.getContext())) {
1652 P.Error(Loc, "invalid use of a non-first-class type");
1656 // Otherwise, create a new forward reference for this value and remember it.
1658 if (Ty->isLabelTy())
1659 FwdVal = BasicBlock::Create(F.getContext(), Name, &F);
1661 FwdVal = new Argument(Ty, Name);
1663 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
1667 Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty,
1669 // Look this name up in the normal function symbol table.
1670 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0;
1672 // If this is a forward reference for the value, see if we already created a
1673 // forward ref record.
1675 std::map<unsigned, std::pair<Value*, LocTy> >::iterator
1676 I = ForwardRefValIDs.find(ID);
1677 if (I != ForwardRefValIDs.end())
1678 Val = I->second.first;
1681 // If we have the value in the symbol table or fwd-ref table, return it.
1683 if (Val->getType() == Ty) return Val;
1684 if (Ty->isLabelTy())
1685 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block");
1687 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" +
1688 Val->getType()->getDescription() + "'");
1692 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) &&
1693 Ty != Type::getLabelTy(F.getContext())) {
1694 P.Error(Loc, "invalid use of a non-first-class type");
1698 // Otherwise, create a new forward reference for this value and remember it.
1700 if (Ty->isLabelTy())
1701 FwdVal = BasicBlock::Create(F.getContext(), "", &F);
1703 FwdVal = new Argument(Ty);
1705 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc);
1709 /// SetInstName - After an instruction is parsed and inserted into its
1710 /// basic block, this installs its name.
1711 bool LLParser::PerFunctionState::SetInstName(int NameID,
1712 const std::string &NameStr,
1713 LocTy NameLoc, Instruction *Inst) {
1714 // If this instruction has void type, it cannot have a name or ID specified.
1715 if (Inst->getType()->isVoidTy()) {
1716 if (NameID != -1 || !NameStr.empty())
1717 return P.Error(NameLoc, "instructions returning void cannot have a name");
1721 // If this was a numbered instruction, verify that the instruction is the
1722 // expected value and resolve any forward references.
1723 if (NameStr.empty()) {
1724 // If neither a name nor an ID was specified, just use the next ID.
1726 NameID = NumberedVals.size();
1728 if (unsigned(NameID) != NumberedVals.size())
1729 return P.Error(NameLoc, "instruction expected to be numbered '%" +
1730 utostr(NumberedVals.size()) + "'");
1732 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI =
1733 ForwardRefValIDs.find(NameID);
1734 if (FI != ForwardRefValIDs.end()) {
1735 if (FI->second.first->getType() != Inst->getType())
1736 return P.Error(NameLoc, "instruction forward referenced with type '" +
1737 FI->second.first->getType()->getDescription() + "'");
1738 FI->second.first->replaceAllUsesWith(Inst);
1739 delete FI->second.first;
1740 ForwardRefValIDs.erase(FI);
1743 NumberedVals.push_back(Inst);
1747 // Otherwise, the instruction had a name. Resolve forward refs and set it.
1748 std::map<std::string, std::pair<Value*, LocTy> >::iterator
1749 FI = ForwardRefVals.find(NameStr);
1750 if (FI != ForwardRefVals.end()) {
1751 if (FI->second.first->getType() != Inst->getType())
1752 return P.Error(NameLoc, "instruction forward referenced with type '" +
1753 FI->second.first->getType()->getDescription() + "'");
1754 FI->second.first->replaceAllUsesWith(Inst);
1755 delete FI->second.first;
1756 ForwardRefVals.erase(FI);
1759 // Set the name on the instruction.
1760 Inst->setName(NameStr);
1762 if (Inst->getNameStr() != NameStr)
1763 return P.Error(NameLoc, "multiple definition of local value named '" +
1768 /// GetBB - Get a basic block with the specified name or ID, creating a
1769 /// forward reference record if needed.
1770 BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name,
1772 return cast_or_null<BasicBlock>(GetVal(Name,
1773 Type::getLabelTy(F.getContext()), Loc));
1776 BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) {
1777 return cast_or_null<BasicBlock>(GetVal(ID,
1778 Type::getLabelTy(F.getContext()), Loc));
1781 /// DefineBB - Define the specified basic block, which is either named or
1782 /// unnamed. If there is an error, this returns null otherwise it returns
1783 /// the block being defined.
1784 BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name,
1788 BB = GetBB(NumberedVals.size(), Loc);
1790 BB = GetBB(Name, Loc);
1791 if (BB == 0) return 0; // Already diagnosed error.
1793 // Move the block to the end of the function. Forward ref'd blocks are
1794 // inserted wherever they happen to be referenced.
1795 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB);
1797 // Remove the block from forward ref sets.
1799 ForwardRefValIDs.erase(NumberedVals.size());
1800 NumberedVals.push_back(BB);
1802 // BB forward references are already in the function symbol table.
1803 ForwardRefVals.erase(Name);
1809 //===----------------------------------------------------------------------===//
1811 //===----------------------------------------------------------------------===//
1813 /// ParseValID - Parse an abstract value that doesn't necessarily have a
1814 /// type implied. For example, if we parse "4" we don't know what integer type
1815 /// it has. The value will later be combined with its type and checked for
1817 bool LLParser::ParseValID(ValID &ID) {
1818 ID.Loc = Lex.getLoc();
1819 switch (Lex.getKind()) {
1820 default: return TokError("expected value token");
1821 case lltok::GlobalID: // @42
1822 ID.UIntVal = Lex.getUIntVal();
1823 ID.Kind = ValID::t_GlobalID;
1825 case lltok::GlobalVar: // @foo
1826 ID.StrVal = Lex.getStrVal();
1827 ID.Kind = ValID::t_GlobalName;
1829 case lltok::LocalVarID: // %42
1830 ID.UIntVal = Lex.getUIntVal();
1831 ID.Kind = ValID::t_LocalID;
1833 case lltok::LocalVar: // %foo
1834 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0
1835 ID.StrVal = Lex.getStrVal();
1836 ID.Kind = ValID::t_LocalName;
1838 case lltok::Metadata: { // !{...} MDNode, !"foo" MDString
1839 ID.Kind = ValID::t_Metadata;
1841 if (Lex.getKind() == lltok::lbrace) {
1842 SmallVector<Value*, 16> Elts;
1843 if (ParseMDNodeVector(Elts) ||
1844 ParseToken(lltok::rbrace, "expected end of metadata node"))
1847 ID.MetadataVal = MDNode::get(Context, Elts.data(), Elts.size());
1851 // Standalone metadata reference
1852 // !{ ..., !42, ... }
1853 if (!ParseMDNode(ID.MetadataVal))
1857 // ::= '!' STRINGCONSTANT
1858 if (ParseMDString(ID.MetadataVal)) return true;
1859 ID.Kind = ValID::t_Metadata;
1863 ID.APSIntVal = Lex.getAPSIntVal();
1864 ID.Kind = ValID::t_APSInt;
1866 case lltok::APFloat:
1867 ID.APFloatVal = Lex.getAPFloatVal();
1868 ID.Kind = ValID::t_APFloat;
1870 case lltok::kw_true:
1871 ID.ConstantVal = ConstantInt::getTrue(Context);
1872 ID.Kind = ValID::t_Constant;
1874 case lltok::kw_false:
1875 ID.ConstantVal = ConstantInt::getFalse(Context);
1876 ID.Kind = ValID::t_Constant;
1878 case lltok::kw_null: ID.Kind = ValID::t_Null; break;
1879 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break;
1880 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break;
1882 case lltok::lbrace: {
1883 // ValID ::= '{' ConstVector '}'
1885 SmallVector<Constant*, 16> Elts;
1886 if (ParseGlobalValueVector(Elts) ||
1887 ParseToken(lltok::rbrace, "expected end of struct constant"))
1890 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(),
1891 Elts.size(), false);
1892 ID.Kind = ValID::t_Constant;
1896 // ValID ::= '<' ConstVector '>' --> Vector.
1897 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct.
1899 bool isPackedStruct = EatIfPresent(lltok::lbrace);
1901 SmallVector<Constant*, 16> Elts;
1902 LocTy FirstEltLoc = Lex.getLoc();
1903 if (ParseGlobalValueVector(Elts) ||
1905 ParseToken(lltok::rbrace, "expected end of packed struct")) ||
1906 ParseToken(lltok::greater, "expected end of constant"))
1909 if (isPackedStruct) {
1911 ConstantStruct::get(Context, Elts.data(), Elts.size(), true);
1912 ID.Kind = ValID::t_Constant;
1917 return Error(ID.Loc, "constant vector must not be empty");
1919 if (!Elts[0]->getType()->isInteger() &&
1920 !Elts[0]->getType()->isFloatingPoint())
1921 return Error(FirstEltLoc,
1922 "vector elements must have integer or floating point type");
1924 // Verify that all the vector elements have the same type.
1925 for (unsigned i = 1, e = Elts.size(); i != e; ++i)
1926 if (Elts[i]->getType() != Elts[0]->getType())
1927 return Error(FirstEltLoc,
1928 "vector element #" + utostr(i) +
1929 " is not of type '" + Elts[0]->getType()->getDescription());
1931 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size());
1932 ID.Kind = ValID::t_Constant;
1935 case lltok::lsquare: { // Array Constant
1937 SmallVector<Constant*, 16> Elts;
1938 LocTy FirstEltLoc = Lex.getLoc();
1939 if (ParseGlobalValueVector(Elts) ||
1940 ParseToken(lltok::rsquare, "expected end of array constant"))
1943 // Handle empty element.
1945 // Use undef instead of an array because it's inconvenient to determine
1946 // the element type at this point, there being no elements to examine.
1947 ID.Kind = ValID::t_EmptyArray;
1951 if (!Elts[0]->getType()->isFirstClassType())
1952 return Error(FirstEltLoc, "invalid array element type: " +
1953 Elts[0]->getType()->getDescription());
1955 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size());
1957 // Verify all elements are correct type!
1958 for (unsigned i = 0, e = Elts.size(); i != e; ++i) {
1959 if (Elts[i]->getType() != Elts[0]->getType())
1960 return Error(FirstEltLoc,
1961 "array element #" + utostr(i) +
1962 " is not of type '" +Elts[0]->getType()->getDescription());
1965 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size());
1966 ID.Kind = ValID::t_Constant;
1969 case lltok::kw_c: // c "foo"
1971 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false);
1972 if (ParseToken(lltok::StringConstant, "expected string")) return true;
1973 ID.Kind = ValID::t_Constant;
1976 case lltok::kw_asm: {
1977 // ValID ::= 'asm' SideEffect? MsAsm? STRINGCONSTANT ',' STRINGCONSTANT
1978 bool HasSideEffect, MsAsm;
1980 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) ||
1981 ParseOptionalToken(lltok::kw_msasm, MsAsm) ||
1982 ParseStringConstant(ID.StrVal) ||
1983 ParseToken(lltok::comma, "expected comma in inline asm expression") ||
1984 ParseToken(lltok::StringConstant, "expected constraint string"))
1986 ID.StrVal2 = Lex.getStrVal();
1987 ID.UIntVal = HasSideEffect | ((unsigned)MsAsm<<1);
1988 ID.Kind = ValID::t_InlineAsm;
1992 case lltok::kw_trunc:
1993 case lltok::kw_zext:
1994 case lltok::kw_sext:
1995 case lltok::kw_fptrunc:
1996 case lltok::kw_fpext:
1997 case lltok::kw_bitcast:
1998 case lltok::kw_uitofp:
1999 case lltok::kw_sitofp:
2000 case lltok::kw_fptoui:
2001 case lltok::kw_fptosi:
2002 case lltok::kw_inttoptr:
2003 case lltok::kw_ptrtoint: {
2004 unsigned Opc = Lex.getUIntVal();
2005 PATypeHolder DestTy(Type::getVoidTy(Context));
2008 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") ||
2009 ParseGlobalTypeAndValue(SrcVal) ||
2010 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") ||
2011 ParseType(DestTy) ||
2012 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast"))
2014 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy))
2015 return Error(ID.Loc, "invalid cast opcode for cast from '" +
2016 SrcVal->getType()->getDescription() + "' to '" +
2017 DestTy->getDescription() + "'");
2018 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc,
2020 ID.Kind = ValID::t_Constant;
2023 case lltok::kw_extractvalue: {
2026 SmallVector<unsigned, 4> Indices;
2027 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")||
2028 ParseGlobalTypeAndValue(Val) ||
2029 ParseIndexList(Indices) ||
2030 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr"))
2032 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType()))
2033 return Error(ID.Loc, "extractvalue operand must be array or struct");
2034 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(),
2036 return Error(ID.Loc, "invalid indices for extractvalue");
2038 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size());
2039 ID.Kind = ValID::t_Constant;
2042 case lltok::kw_insertvalue: {
2044 Constant *Val0, *Val1;
2045 SmallVector<unsigned, 4> Indices;
2046 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")||
2047 ParseGlobalTypeAndValue(Val0) ||
2048 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")||
2049 ParseGlobalTypeAndValue(Val1) ||
2050 ParseIndexList(Indices) ||
2051 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr"))
2053 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType()))
2054 return Error(ID.Loc, "extractvalue operand must be array or struct");
2055 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(),
2057 return Error(ID.Loc, "invalid indices for insertvalue");
2058 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1,
2059 Indices.data(), Indices.size());
2060 ID.Kind = ValID::t_Constant;
2063 case lltok::kw_icmp:
2064 case lltok::kw_fcmp: {
2065 unsigned PredVal, Opc = Lex.getUIntVal();
2066 Constant *Val0, *Val1;
2068 if (ParseCmpPredicate(PredVal, Opc) ||
2069 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") ||
2070 ParseGlobalTypeAndValue(Val0) ||
2071 ParseToken(lltok::comma, "expected comma in compare constantexpr") ||
2072 ParseGlobalTypeAndValue(Val1) ||
2073 ParseToken(lltok::rparen, "expected ')' in compare constantexpr"))
2076 if (Val0->getType() != Val1->getType())
2077 return Error(ID.Loc, "compare operands must have the same type");
2079 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal;
2081 if (Opc == Instruction::FCmp) {
2082 if (!Val0->getType()->isFPOrFPVector())
2083 return Error(ID.Loc, "fcmp requires floating point operands");
2084 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1);
2086 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!");
2087 if (!Val0->getType()->isIntOrIntVector() &&
2088 !isa<PointerType>(Val0->getType()))
2089 return Error(ID.Loc, "icmp requires pointer or integer operands");
2090 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1);
2092 ID.Kind = ValID::t_Constant;
2096 // Binary Operators.
2098 case lltok::kw_fadd:
2100 case lltok::kw_fsub:
2102 case lltok::kw_fmul:
2103 case lltok::kw_udiv:
2104 case lltok::kw_sdiv:
2105 case lltok::kw_fdiv:
2106 case lltok::kw_urem:
2107 case lltok::kw_srem:
2108 case lltok::kw_frem: {
2112 unsigned Opc = Lex.getUIntVal();
2113 Constant *Val0, *Val1;
2115 LocTy ModifierLoc = Lex.getLoc();
2116 if (Opc == Instruction::Add ||
2117 Opc == Instruction::Sub ||
2118 Opc == Instruction::Mul) {
2119 if (EatIfPresent(lltok::kw_nuw))
2121 if (EatIfPresent(lltok::kw_nsw)) {
2123 if (EatIfPresent(lltok::kw_nuw))
2126 } else if (Opc == Instruction::SDiv) {
2127 if (EatIfPresent(lltok::kw_exact))
2130 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") ||
2131 ParseGlobalTypeAndValue(Val0) ||
2132 ParseToken(lltok::comma, "expected comma in binary constantexpr") ||
2133 ParseGlobalTypeAndValue(Val1) ||
2134 ParseToken(lltok::rparen, "expected ')' in binary constantexpr"))
2136 if (Val0->getType() != Val1->getType())
2137 return Error(ID.Loc, "operands of constexpr must have same type");
2138 if (!Val0->getType()->isIntOrIntVector()) {
2140 return Error(ModifierLoc, "nuw only applies to integer operations");
2142 return Error(ModifierLoc, "nsw only applies to integer operations");
2144 // API compatibility: Accept either integer or floating-point types with
2145 // add, sub, and mul.
2146 if (!Val0->getType()->isIntOrIntVector() &&
2147 !Val0->getType()->isFPOrFPVector())
2148 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands");
2150 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2151 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap;
2152 if (Exact) Flags |= SDivOperator::IsExact;
2153 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags);
2155 ID.Kind = ValID::t_Constant;
2159 // Logical Operations
2161 case lltok::kw_lshr:
2162 case lltok::kw_ashr:
2165 case lltok::kw_xor: {
2166 unsigned Opc = Lex.getUIntVal();
2167 Constant *Val0, *Val1;
2169 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") ||
2170 ParseGlobalTypeAndValue(Val0) ||
2171 ParseToken(lltok::comma, "expected comma in logical constantexpr") ||
2172 ParseGlobalTypeAndValue(Val1) ||
2173 ParseToken(lltok::rparen, "expected ')' in logical constantexpr"))
2175 if (Val0->getType() != Val1->getType())
2176 return Error(ID.Loc, "operands of constexpr must have same type");
2177 if (!Val0->getType()->isIntOrIntVector())
2178 return Error(ID.Loc,
2179 "constexpr requires integer or integer vector operands");
2180 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1);
2181 ID.Kind = ValID::t_Constant;
2185 case lltok::kw_getelementptr:
2186 case lltok::kw_shufflevector:
2187 case lltok::kw_insertelement:
2188 case lltok::kw_extractelement:
2189 case lltok::kw_select: {
2190 unsigned Opc = Lex.getUIntVal();
2191 SmallVector<Constant*, 16> Elts;
2192 bool InBounds = false;
2194 if (Opc == Instruction::GetElementPtr)
2195 InBounds = EatIfPresent(lltok::kw_inbounds);
2196 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") ||
2197 ParseGlobalValueVector(Elts) ||
2198 ParseToken(lltok::rparen, "expected ')' in constantexpr"))
2201 if (Opc == Instruction::GetElementPtr) {
2202 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType()))
2203 return Error(ID.Loc, "getelementptr requires pointer operand");
2205 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(),
2206 (Value**)(Elts.data() + 1),
2208 return Error(ID.Loc, "invalid indices for getelementptr");
2209 ID.ConstantVal = InBounds ?
2210 ConstantExpr::getInBoundsGetElementPtr(Elts[0],
2213 ConstantExpr::getGetElementPtr(Elts[0],
2214 Elts.data() + 1, Elts.size() - 1);
2215 } else if (Opc == Instruction::Select) {
2216 if (Elts.size() != 3)
2217 return Error(ID.Loc, "expected three operands to select");
2218 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1],
2220 return Error(ID.Loc, Reason);
2221 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]);
2222 } else if (Opc == Instruction::ShuffleVector) {
2223 if (Elts.size() != 3)
2224 return Error(ID.Loc, "expected three operands to shufflevector");
2225 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2]))
2226 return Error(ID.Loc, "invalid operands to shufflevector");
2228 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]);
2229 } else if (Opc == Instruction::ExtractElement) {
2230 if (Elts.size() != 2)
2231 return Error(ID.Loc, "expected two operands to extractelement");
2232 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1]))
2233 return Error(ID.Loc, "invalid extractelement operands");
2234 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]);
2236 assert(Opc == Instruction::InsertElement && "Unknown opcode");
2237 if (Elts.size() != 3)
2238 return Error(ID.Loc, "expected three operands to insertelement");
2239 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2]))
2240 return Error(ID.Loc, "invalid insertelement operands");
2242 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]);
2245 ID.Kind = ValID::t_Constant;
2254 /// ParseGlobalValue - Parse a global value with the specified type.
2255 bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) {
2258 return ParseValID(ID) ||
2259 ConvertGlobalValIDToValue(Ty, ID, V);
2262 /// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved
2264 bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID,
2266 if (isa<FunctionType>(Ty))
2267 return Error(ID.Loc, "functions are not values, refer to them as pointers");
2270 default: llvm_unreachable("Unknown ValID!");
2271 case ValID::t_Metadata:
2272 return Error(ID.Loc, "invalid use of metadata");
2273 case ValID::t_LocalID:
2274 case ValID::t_LocalName:
2275 return Error(ID.Loc, "invalid use of function-local name");
2276 case ValID::t_InlineAsm:
2277 return Error(ID.Loc, "inline asm can only be an operand of call/invoke");
2278 case ValID::t_GlobalName:
2279 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc);
2281 case ValID::t_GlobalID:
2282 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc);
2284 case ValID::t_APSInt:
2285 if (!isa<IntegerType>(Ty))
2286 return Error(ID.Loc, "integer constant must have integer type");
2287 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits());
2288 V = ConstantInt::get(Context, ID.APSIntVal);
2290 case ValID::t_APFloat:
2291 if (!Ty->isFloatingPoint() ||
2292 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal))
2293 return Error(ID.Loc, "floating point constant invalid for type");
2295 // The lexer has no type info, so builds all float and double FP constants
2296 // as double. Fix this here. Long double does not need this.
2297 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble &&
2300 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven,
2303 V = ConstantFP::get(Context, ID.APFloatVal);
2305 if (V->getType() != Ty)
2306 return Error(ID.Loc, "floating point constant does not have type '" +
2307 Ty->getDescription() + "'");
2311 if (!isa<PointerType>(Ty))
2312 return Error(ID.Loc, "null must be a pointer type");
2313 V = ConstantPointerNull::get(cast<PointerType>(Ty));
2315 case ValID::t_Undef:
2316 // FIXME: LabelTy should not be a first-class type.
2317 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) &&
2318 !isa<OpaqueType>(Ty))
2319 return Error(ID.Loc, "invalid type for undef constant");
2320 V = UndefValue::get(Ty);
2322 case ValID::t_EmptyArray:
2323 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0)
2324 return Error(ID.Loc, "invalid empty array initializer");
2325 V = UndefValue::get(Ty);
2328 // FIXME: LabelTy should not be a first-class type.
2329 if (!Ty->isFirstClassType() || Ty->isLabelTy())
2330 return Error(ID.Loc, "invalid type for null constant");
2331 V = Constant::getNullValue(Ty);
2333 case ValID::t_Constant:
2334 if (ID.ConstantVal->getType() != Ty)
2335 return Error(ID.Loc, "constant expression type mismatch");
2341 bool LLParser::ParseGlobalTypeAndValue(Constant *&V) {
2342 PATypeHolder Type(Type::getVoidTy(Context));
2343 return ParseType(Type) ||
2344 ParseGlobalValue(Type, V);
2347 /// ParseGlobalValueVector
2349 /// ::= TypeAndValue (',' TypeAndValue)*
2350 bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) {
2352 if (Lex.getKind() == lltok::rbrace ||
2353 Lex.getKind() == lltok::rsquare ||
2354 Lex.getKind() == lltok::greater ||
2355 Lex.getKind() == lltok::rparen)
2359 if (ParseGlobalTypeAndValue(C)) return true;
2362 while (EatIfPresent(lltok::comma)) {
2363 if (ParseGlobalTypeAndValue(C)) return true;
2371 //===----------------------------------------------------------------------===//
2372 // Function Parsing.
2373 //===----------------------------------------------------------------------===//
2375 bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V,
2376 PerFunctionState &PFS) {
2377 if (ID.Kind == ValID::t_LocalID)
2378 V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc);
2379 else if (ID.Kind == ValID::t_LocalName)
2380 V = PFS.GetVal(ID.StrVal, Ty, ID.Loc);
2381 else if (ID.Kind == ValID::t_InlineAsm) {
2382 const PointerType *PTy = dyn_cast<PointerType>(Ty);
2383 const FunctionType *FTy =
2384 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0;
2385 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2))
2386 return Error(ID.Loc, "invalid type for inline asm constraint string");
2387 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1);
2389 } else if (ID.Kind == ValID::t_Metadata) {
2393 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true;
2401 bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) {
2404 return ParseValID(ID) ||
2405 ConvertValIDToValue(Ty, ID, V, PFS);
2408 bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) {
2409 PATypeHolder T(Type::getVoidTy(Context));
2410 return ParseType(T) ||
2411 ParseValue(T, V, PFS);
2415 /// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs
2416 /// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection
2417 /// OptionalAlign OptGC
2418 bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) {
2419 // Parse the linkage.
2420 LocTy LinkageLoc = Lex.getLoc();
2423 unsigned Visibility, RetAttrs;
2425 PATypeHolder RetType(Type::getVoidTy(Context));
2426 LocTy RetTypeLoc = Lex.getLoc();
2427 if (ParseOptionalLinkage(Linkage) ||
2428 ParseOptionalVisibility(Visibility) ||
2429 ParseOptionalCallingConv(CC) ||
2430 ParseOptionalAttrs(RetAttrs, 1) ||
2431 ParseType(RetType, RetTypeLoc, true /*void allowed*/))
2434 // Verify that the linkage is ok.
2435 switch ((GlobalValue::LinkageTypes)Linkage) {
2436 case GlobalValue::ExternalLinkage:
2437 break; // always ok.
2438 case GlobalValue::DLLImportLinkage:
2439 case GlobalValue::ExternalWeakLinkage:
2441 return Error(LinkageLoc, "invalid linkage for function definition");
2443 case GlobalValue::PrivateLinkage:
2444 case GlobalValue::LinkerPrivateLinkage:
2445 case GlobalValue::InternalLinkage:
2446 case GlobalValue::AvailableExternallyLinkage:
2447 case GlobalValue::LinkOnceAnyLinkage:
2448 case GlobalValue::LinkOnceODRLinkage:
2449 case GlobalValue::WeakAnyLinkage:
2450 case GlobalValue::WeakODRLinkage:
2451 case GlobalValue::DLLExportLinkage:
2453 return Error(LinkageLoc, "invalid linkage for function declaration");
2455 case GlobalValue::AppendingLinkage:
2456 case GlobalValue::GhostLinkage:
2457 case GlobalValue::CommonLinkage:
2458 return Error(LinkageLoc, "invalid function linkage type");
2461 if (!FunctionType::isValidReturnType(RetType) ||
2462 isa<OpaqueType>(RetType))
2463 return Error(RetTypeLoc, "invalid function return type");
2465 LocTy NameLoc = Lex.getLoc();
2467 std::string FunctionName;
2468 if (Lex.getKind() == lltok::GlobalVar) {
2469 FunctionName = Lex.getStrVal();
2470 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok.
2471 unsigned NameID = Lex.getUIntVal();
2473 if (NameID != NumberedVals.size())
2474 return TokError("function expected to be numbered '%" +
2475 utostr(NumberedVals.size()) + "'");
2477 return TokError("expected function name");
2482 if (Lex.getKind() != lltok::lparen)
2483 return TokError("expected '(' in function argument list");
2485 std::vector<ArgInfo> ArgList;
2488 std::string Section;
2492 if (ParseArgumentList(ArgList, isVarArg, false) ||
2493 ParseOptionalAttrs(FuncAttrs, 2) ||
2494 (EatIfPresent(lltok::kw_section) &&
2495 ParseStringConstant(Section)) ||
2496 ParseOptionalAlignment(Alignment) ||
2497 (EatIfPresent(lltok::kw_gc) &&
2498 ParseStringConstant(GC)))
2501 // If the alignment was parsed as an attribute, move to the alignment field.
2502 if (FuncAttrs & Attribute::Alignment) {
2503 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs);
2504 FuncAttrs &= ~Attribute::Alignment;
2507 // Okay, if we got here, the function is syntactically valid. Convert types
2508 // and do semantic checks.
2509 std::vector<const Type*> ParamTypeList;
2510 SmallVector<AttributeWithIndex, 8> Attrs;
2511 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function
2513 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg;
2514 if (FuncAttrs & ObsoleteFuncAttrs) {
2515 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs;
2516 FuncAttrs &= ~ObsoleteFuncAttrs;
2519 if (RetAttrs != Attribute::None)
2520 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs));
2522 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
2523 ParamTypeList.push_back(ArgList[i].Type);
2524 if (ArgList[i].Attrs != Attribute::None)
2525 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs));
2528 if (FuncAttrs != Attribute::None)
2529 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs));
2531 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end());
2533 if (PAL.paramHasAttr(1, Attribute::StructRet) &&
2534 RetType != Type::getVoidTy(Context))
2535 return Error(RetTypeLoc, "functions with 'sret' argument must return void");
2537 const FunctionType *FT =
2538 FunctionType::get(RetType, ParamTypeList, isVarArg);
2539 const PointerType *PFT = PointerType::getUnqual(FT);
2542 if (!FunctionName.empty()) {
2543 // If this was a definition of a forward reference, remove the definition
2544 // from the forward reference table and fill in the forward ref.
2545 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI =
2546 ForwardRefVals.find(FunctionName);
2547 if (FRVI != ForwardRefVals.end()) {
2548 Fn = M->getFunction(FunctionName);
2549 ForwardRefVals.erase(FRVI);
2550 } else if ((Fn = M->getFunction(FunctionName))) {
2551 // If this function already exists in the symbol table, then it is
2552 // multiply defined. We accept a few cases for old backwards compat.
2553 // FIXME: Remove this stuff for LLVM 3.0.
2554 if (Fn->getType() != PFT || Fn->getAttributes() != PAL ||
2555 (!Fn->isDeclaration() && isDefine)) {
2556 // If the redefinition has different type or different attributes,
2557 // reject it. If both have bodies, reject it.
2558 return Error(NameLoc, "invalid redefinition of function '" +
2559 FunctionName + "'");
2560 } else if (Fn->isDeclaration()) {
2561 // Make sure to strip off any argument names so we can't get conflicts.
2562 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end();
2569 // If this is a definition of a forward referenced function, make sure the
2571 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I
2572 = ForwardRefValIDs.find(NumberedVals.size());
2573 if (I != ForwardRefValIDs.end()) {
2574 Fn = cast<Function>(I->second.first);
2575 if (Fn->getType() != PFT)
2576 return Error(NameLoc, "type of definition and forward reference of '@" +
2577 utostr(NumberedVals.size()) +"' disagree");
2578 ForwardRefValIDs.erase(I);
2583 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M);
2584 else // Move the forward-reference to the correct spot in the module.
2585 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn);
2587 if (FunctionName.empty())
2588 NumberedVals.push_back(Fn);
2590 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage);
2591 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility);
2592 Fn->setCallingConv(CC);
2593 Fn->setAttributes(PAL);
2594 Fn->setAlignment(Alignment);
2595 Fn->setSection(Section);
2596 if (!GC.empty()) Fn->setGC(GC.c_str());
2598 // Add all of the arguments we parsed to the function.
2599 Function::arg_iterator ArgIt = Fn->arg_begin();
2600 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) {
2601 // If the argument has a name, insert it into the argument symbol table.
2602 if (ArgList[i].Name.empty()) continue;
2604 // Set the name, if it conflicted, it will be auto-renamed.
2605 ArgIt->setName(ArgList[i].Name);
2607 if (ArgIt->getNameStr() != ArgList[i].Name)
2608 return Error(ArgList[i].Loc, "redefinition of argument '%" +
2609 ArgList[i].Name + "'");
2616 /// ParseFunctionBody
2617 /// ::= '{' BasicBlock+ '}'
2618 /// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0
2620 bool LLParser::ParseFunctionBody(Function &Fn) {
2621 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin)
2622 return TokError("expected '{' in function body");
2623 Lex.Lex(); // eat the {.
2625 PerFunctionState PFS(*this, Fn);
2627 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end)
2628 if (ParseBasicBlock(PFS)) return true;
2633 // Verify function is ok.
2634 return PFS.VerifyFunctionComplete();
2638 /// ::= LabelStr? Instruction*
2639 bool LLParser::ParseBasicBlock(PerFunctionState &PFS) {
2640 // If this basic block starts out with a name, remember it.
2642 LocTy NameLoc = Lex.getLoc();
2643 if (Lex.getKind() == lltok::LabelStr) {
2644 Name = Lex.getStrVal();
2648 BasicBlock *BB = PFS.DefineBB(Name, NameLoc);
2649 if (BB == 0) return true;
2651 std::string NameStr;
2653 // Parse the instructions in this block until we get a terminator.
2656 // This instruction may have three possibilities for a name: a) none
2657 // specified, b) name specified "%foo =", c) number specified: "%4 =".
2658 LocTy NameLoc = Lex.getLoc();
2662 if (Lex.getKind() == lltok::LocalVarID) {
2663 NameID = Lex.getUIntVal();
2665 if (ParseToken(lltok::equal, "expected '=' after instruction id"))
2667 } else if (Lex.getKind() == lltok::LocalVar ||
2668 // FIXME: REMOVE IN LLVM 3.0
2669 Lex.getKind() == lltok::StringConstant) {
2670 NameStr = Lex.getStrVal();
2672 if (ParseToken(lltok::equal, "expected '=' after instruction name"))
2676 if (ParseInstruction(Inst, BB, PFS)) return true;
2677 if (EatIfPresent(lltok::comma))
2678 ParseOptionalCustomMetadata();
2680 // Set metadata attached with this instruction.
2681 MetadataContext &TheMetadata = M->getContext().getMetadata();
2682 for (SmallVector<std::pair<unsigned, MDNode *>, 2>::iterator
2683 MDI = MDsOnInst.begin(), MDE = MDsOnInst.end(); MDI != MDE; ++MDI)
2684 TheMetadata.addMD(MDI->first, MDI->second, Inst);
2687 BB->getInstList().push_back(Inst);
2689 // Set the name on the instruction.
2690 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true;
2691 } while (!isa<TerminatorInst>(Inst));
2696 //===----------------------------------------------------------------------===//
2697 // Instruction Parsing.
2698 //===----------------------------------------------------------------------===//
2700 /// ParseInstruction - Parse one of the many different instructions.
2702 bool LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB,
2703 PerFunctionState &PFS) {
2704 lltok::Kind Token = Lex.getKind();
2705 if (Token == lltok::Eof)
2706 return TokError("found end of file when expecting more instructions");
2707 LocTy Loc = Lex.getLoc();
2708 unsigned KeywordVal = Lex.getUIntVal();
2709 Lex.Lex(); // Eat the keyword.
2712 default: return Error(Loc, "expected instruction opcode");
2713 // Terminator Instructions.
2714 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false;
2715 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false;
2716 case lltok::kw_ret: return ParseRet(Inst, BB, PFS);
2717 case lltok::kw_br: return ParseBr(Inst, PFS);
2718 case lltok::kw_switch: return ParseSwitch(Inst, PFS);
2719 case lltok::kw_invoke: return ParseInvoke(Inst, PFS);
2720 // Binary Operators.
2723 case lltok::kw_mul: {
2726 LocTy ModifierLoc = Lex.getLoc();
2727 if (EatIfPresent(lltok::kw_nuw))
2729 if (EatIfPresent(lltok::kw_nsw)) {
2731 if (EatIfPresent(lltok::kw_nuw))
2734 // API compatibility: Accept either integer or floating-point types.
2735 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0);
2737 if (!Inst->getType()->isIntOrIntVector()) {
2739 return Error(ModifierLoc, "nuw only applies to integer operations");
2741 return Error(ModifierLoc, "nsw only applies to integer operations");
2744 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true);
2746 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true);
2750 case lltok::kw_fadd:
2751 case lltok::kw_fsub:
2752 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2);
2754 case lltok::kw_sdiv: {
2756 if (EatIfPresent(lltok::kw_exact))
2758 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1);
2761 cast<BinaryOperator>(Inst)->setIsExact(true);
2765 case lltok::kw_udiv:
2766 case lltok::kw_urem:
2767 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1);
2768 case lltok::kw_fdiv:
2769 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2);
2771 case lltok::kw_lshr:
2772 case lltok::kw_ashr:
2775 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal);
2776 case lltok::kw_icmp:
2777 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal);
2779 case lltok::kw_trunc:
2780 case lltok::kw_zext:
2781 case lltok::kw_sext:
2782 case lltok::kw_fptrunc:
2783 case lltok::kw_fpext:
2784 case lltok::kw_bitcast:
2785 case lltok::kw_uitofp:
2786 case lltok::kw_sitofp:
2787 case lltok::kw_fptoui:
2788 case lltok::kw_fptosi:
2789 case lltok::kw_inttoptr:
2790 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal);
2792 case lltok::kw_select: return ParseSelect(Inst, PFS);
2793 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS);
2794 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS);
2795 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS);
2796 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS);
2797 case lltok::kw_phi: return ParsePHI(Inst, PFS);
2798 case lltok::kw_call: return ParseCall(Inst, PFS, false);
2799 case lltok::kw_tail: return ParseCall(Inst, PFS, true);
2801 case lltok::kw_alloca: return ParseAlloc(Inst, PFS);
2802 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false);
2803 case lltok::kw_free: return ParseFree(Inst, PFS);
2804 case lltok::kw_load: return ParseLoad(Inst, PFS, false);
2805 case lltok::kw_store: return ParseStore(Inst, PFS, false);
2806 case lltok::kw_volatile:
2807 if (EatIfPresent(lltok::kw_load))
2808 return ParseLoad(Inst, PFS, true);
2809 else if (EatIfPresent(lltok::kw_store))
2810 return ParseStore(Inst, PFS, true);
2812 return TokError("expected 'load' or 'store'");
2813 case lltok::kw_getresult: return ParseGetResult(Inst, PFS);
2814 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS);
2815 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS);
2816 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS);
2820 /// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind.
2821 bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) {
2822 if (Opc == Instruction::FCmp) {
2823 switch (Lex.getKind()) {
2824 default: TokError("expected fcmp predicate (e.g. 'oeq')");
2825 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break;
2826 case lltok::kw_one: P = CmpInst::FCMP_ONE; break;
2827 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break;
2828 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break;
2829 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break;
2830 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break;
2831 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break;
2832 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break;
2833 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break;
2834 case lltok::kw_une: P = CmpInst::FCMP_UNE; break;
2835 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break;
2836 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break;
2837 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break;
2838 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break;
2839 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break;
2840 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break;
2843 switch (Lex.getKind()) {
2844 default: TokError("expected icmp predicate (e.g. 'eq')");
2845 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break;
2846 case lltok::kw_ne: P = CmpInst::ICMP_NE; break;
2847 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break;
2848 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break;
2849 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break;
2850 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break;
2851 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break;
2852 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break;
2853 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break;
2854 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break;
2861 //===----------------------------------------------------------------------===//
2862 // Terminator Instructions.
2863 //===----------------------------------------------------------------------===//
2865 /// ParseRet - Parse a return instruction.
2866 /// ::= 'ret' void (',' !dbg, !1)
2867 /// ::= 'ret' TypeAndValue (',' !dbg, !1)
2868 /// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1)
2869 /// [[obsolete: LLVM 3.0]]
2870 bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB,
2871 PerFunctionState &PFS) {
2872 PATypeHolder Ty(Type::getVoidTy(Context));
2873 if (ParseType(Ty, true /*void allowed*/)) return true;
2875 if (Ty->isVoidTy()) {
2876 Inst = ReturnInst::Create(Context);
2881 if (ParseValue(Ty, RV, PFS)) return true;
2883 if (EatIfPresent(lltok::comma)) {
2884 // Parse optional custom metadata, e.g. !dbg
2885 if (Lex.getKind() == lltok::NamedOrCustomMD) {
2886 if (ParseOptionalCustomMetadata()) return true;
2888 // The normal case is one return value.
2889 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring use
2890 // of 'ret {i32,i32} {i32 1, i32 2}'
2891 SmallVector<Value*, 8> RVs;
2895 // If optional custom metadata, e.g. !dbg is seen then this is the
2897 if (Lex.getKind() == lltok::NamedOrCustomMD)
2899 if (ParseTypeAndValue(RV, PFS)) return true;
2901 } while (EatIfPresent(lltok::comma));
2903 RV = UndefValue::get(PFS.getFunction().getReturnType());
2904 for (unsigned i = 0, e = RVs.size(); i != e; ++i) {
2905 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv");
2906 BB->getInstList().push_back(I);
2912 Inst = ReturnInst::Create(Context, RV);
2918 /// ::= 'br' TypeAndValue
2919 /// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue
2920 bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) {
2922 Value *Op0, *Op1, *Op2;
2923 if (ParseTypeAndValue(Op0, Loc, PFS)) return true;
2925 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) {
2926 Inst = BranchInst::Create(BB);
2930 if (Op0->getType() != Type::getInt1Ty(Context))
2931 return Error(Loc, "branch condition must have 'i1' type");
2933 if (ParseToken(lltok::comma, "expected ',' after branch condition") ||
2934 ParseTypeAndValue(Op1, Loc, PFS) ||
2935 ParseToken(lltok::comma, "expected ',' after true destination") ||
2936 ParseTypeAndValue(Op2, Loc2, PFS))
2939 if (!isa<BasicBlock>(Op1))
2940 return Error(Loc, "true destination of branch must be a basic block");
2941 if (!isa<BasicBlock>(Op2))
2942 return Error(Loc2, "true destination of branch must be a basic block");
2944 Inst = BranchInst::Create(cast<BasicBlock>(Op1), cast<BasicBlock>(Op2), Op0);
2950 /// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']'
2952 /// ::= (TypeAndValue ',' TypeAndValue)*
2953 bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) {
2954 LocTy CondLoc, BBLoc;
2955 Value *Cond, *DefaultBB;
2956 if (ParseTypeAndValue(Cond, CondLoc, PFS) ||
2957 ParseToken(lltok::comma, "expected ',' after switch condition") ||
2958 ParseTypeAndValue(DefaultBB, BBLoc, PFS) ||
2959 ParseToken(lltok::lsquare, "expected '[' with switch table"))
2962 if (!isa<IntegerType>(Cond->getType()))
2963 return Error(CondLoc, "switch condition must have integer type");
2964 if (!isa<BasicBlock>(DefaultBB))
2965 return Error(BBLoc, "default destination must be a basic block");
2967 // Parse the jump table pairs.
2968 SmallPtrSet<Value*, 32> SeenCases;
2969 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table;
2970 while (Lex.getKind() != lltok::rsquare) {
2971 Value *Constant, *DestBB;
2973 if (ParseTypeAndValue(Constant, CondLoc, PFS) ||
2974 ParseToken(lltok::comma, "expected ',' after case value") ||
2975 ParseTypeAndValue(DestBB, BBLoc, PFS))
2978 if (!SeenCases.insert(Constant))
2979 return Error(CondLoc, "duplicate case value in switch");
2980 if (!isa<ConstantInt>(Constant))
2981 return Error(CondLoc, "case value is not a constant integer");
2982 if (!isa<BasicBlock>(DestBB))
2983 return Error(BBLoc, "case destination is not a basic block");
2985 Table.push_back(std::make_pair(cast<ConstantInt>(Constant),
2986 cast<BasicBlock>(DestBB)));
2989 Lex.Lex(); // Eat the ']'.
2991 SwitchInst *SI = SwitchInst::Create(Cond, cast<BasicBlock>(DefaultBB),
2993 for (unsigned i = 0, e = Table.size(); i != e; ++i)
2994 SI->addCase(Table[i].first, Table[i].second);
3000 /// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList
3001 /// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue
3002 bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) {
3003 LocTy CallLoc = Lex.getLoc();
3004 unsigned RetAttrs, FnAttrs;
3006 PATypeHolder RetType(Type::getVoidTy(Context));
3009 SmallVector<ParamInfo, 16> ArgList;
3011 Value *NormalBB, *UnwindBB;
3012 if (ParseOptionalCallingConv(CC) ||
3013 ParseOptionalAttrs(RetAttrs, 1) ||
3014 ParseType(RetType, RetTypeLoc, true /*void allowed*/) ||
3015 ParseValID(CalleeID) ||
3016 ParseParameterList(ArgList, PFS) ||
3017 ParseOptionalAttrs(FnAttrs, 2) ||
3018 ParseToken(lltok::kw_to, "expected 'to' in invoke") ||
3019 ParseTypeAndValue(NormalBB, PFS) ||
3020 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") ||
3021 ParseTypeAndValue(UnwindBB, PFS))
3024 if (!isa<BasicBlock>(NormalBB))
3025 return Error(CallLoc, "normal destination is not a basic block");
3026 if (!isa<BasicBlock>(UnwindBB))
3027 return Error(CallLoc, "unwind destination is not a basic block");
3029 // If RetType is a non-function pointer type, then this is the short syntax
3030 // for the call, which means that RetType is just the return type. Infer the
3031 // rest of the function argument types from the arguments that are present.
3032 const PointerType *PFTy = 0;
3033 const FunctionType *Ty = 0;
3034 if (!(PFTy = dyn_cast<PointerType>(RetType)) ||
3035 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
3036 // Pull out the types of all of the arguments...
3037 std::vector<const Type*> ParamTypes;
3038 for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
3039 ParamTypes.push_back(ArgList[i].V->getType());
3041 if (!FunctionType::isValidReturnType(RetType))
3042 return Error(RetTypeLoc, "Invalid result type for LLVM function");
3044 Ty = FunctionType::get(RetType, ParamTypes, false);
3045 PFTy = PointerType::getUnqual(Ty);
3048 // Look up the callee.
3050 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true;
3052 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional
3053 // function attributes.
3054 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg;
3055 if (FnAttrs & ObsoleteFuncAttrs) {
3056 RetAttrs |= FnAttrs & ObsoleteFuncAttrs;
3057 FnAttrs &= ~ObsoleteFuncAttrs;
3060 // Set up the Attributes for the function.
3061 SmallVector<AttributeWithIndex, 8> Attrs;
3062 if (RetAttrs != Attribute::None)
3063 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs));
3065 SmallVector<Value*, 8> Args;
3067 // Loop through FunctionType's arguments and ensure they are specified
3068 // correctly. Also, gather any parameter attributes.
3069 FunctionType::param_iterator I = Ty->param_begin();
3070 FunctionType::param_iterator E = Ty->param_end();
3071 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
3072 const Type *ExpectedTy = 0;
3075 } else if (!Ty->isVarArg()) {
3076 return Error(ArgList[i].Loc, "too many arguments specified");
3079 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType())
3080 return Error(ArgList[i].Loc, "argument is not of expected type '" +
3081 ExpectedTy->getDescription() + "'");
3082 Args.push_back(ArgList[i].V);
3083 if (ArgList[i].Attrs != Attribute::None)
3084 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs));
3088 return Error(CallLoc, "not enough parameters specified for call");
3090 if (FnAttrs != Attribute::None)
3091 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs));
3093 // Finish off the Attributes and check them
3094 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end());
3096 InvokeInst *II = InvokeInst::Create(Callee, cast<BasicBlock>(NormalBB),
3097 cast<BasicBlock>(UnwindBB),
3098 Args.begin(), Args.end());
3099 II->setCallingConv(CC);
3100 II->setAttributes(PAL);
3107 //===----------------------------------------------------------------------===//
3108 // Binary Operators.
3109 //===----------------------------------------------------------------------===//
3112 /// ::= ArithmeticOps TypeAndValue ',' Value
3114 /// If OperandType is 0, then any FP or integer operand is allowed. If it is 1,
3115 /// then any integer operand is allowed, if it is 2, any fp operand is allowed.
3116 bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS,
3117 unsigned Opc, unsigned OperandType) {
3118 LocTy Loc; Value *LHS, *RHS;
3119 if (ParseTypeAndValue(LHS, Loc, PFS) ||
3120 ParseToken(lltok::comma, "expected ',' in arithmetic operation") ||
3121 ParseValue(LHS->getType(), RHS, PFS))
3125 switch (OperandType) {
3126 default: llvm_unreachable("Unknown operand type!");
3127 case 0: // int or FP.
3128 Valid = LHS->getType()->isIntOrIntVector() ||
3129 LHS->getType()->isFPOrFPVector();
3131 case 1: Valid = LHS->getType()->isIntOrIntVector(); break;
3132 case 2: Valid = LHS->getType()->isFPOrFPVector(); break;
3136 return Error(Loc, "invalid operand type for instruction");
3138 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3143 /// ::= ArithmeticOps TypeAndValue ',' Value {
3144 bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS,
3146 LocTy Loc; Value *LHS, *RHS;
3147 if (ParseTypeAndValue(LHS, Loc, PFS) ||
3148 ParseToken(lltok::comma, "expected ',' in logical operation") ||
3149 ParseValue(LHS->getType(), RHS, PFS))
3152 if (!LHS->getType()->isIntOrIntVector())
3153 return Error(Loc,"instruction requires integer or integer vector operands");
3155 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3161 /// ::= 'icmp' IPredicates TypeAndValue ',' Value
3162 /// ::= 'fcmp' FPredicates TypeAndValue ',' Value
3163 bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS,
3165 // Parse the integer/fp comparison predicate.
3169 if (ParseCmpPredicate(Pred, Opc) ||
3170 ParseTypeAndValue(LHS, Loc, PFS) ||
3171 ParseToken(lltok::comma, "expected ',' after compare value") ||
3172 ParseValue(LHS->getType(), RHS, PFS))
3175 if (Opc == Instruction::FCmp) {
3176 if (!LHS->getType()->isFPOrFPVector())
3177 return Error(Loc, "fcmp requires floating point operands");
3178 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS);
3180 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!");
3181 if (!LHS->getType()->isIntOrIntVector() &&
3182 !isa<PointerType>(LHS->getType()))
3183 return Error(Loc, "icmp requires integer operands");
3184 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS);
3189 //===----------------------------------------------------------------------===//
3190 // Other Instructions.
3191 //===----------------------------------------------------------------------===//
3195 /// ::= CastOpc TypeAndValue 'to' Type
3196 bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS,
3198 LocTy Loc; Value *Op;
3199 PATypeHolder DestTy(Type::getVoidTy(Context));
3200 if (ParseTypeAndValue(Op, Loc, PFS) ||
3201 ParseToken(lltok::kw_to, "expected 'to' after cast value") ||
3205 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) {
3206 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy);
3207 return Error(Loc, "invalid cast opcode for cast from '" +
3208 Op->getType()->getDescription() + "' to '" +
3209 DestTy->getDescription() + "'");
3211 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy);
3216 /// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue
3217 bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) {
3219 Value *Op0, *Op1, *Op2;
3220 if (ParseTypeAndValue(Op0, Loc, PFS) ||
3221 ParseToken(lltok::comma, "expected ',' after select condition") ||
3222 ParseTypeAndValue(Op1, PFS) ||
3223 ParseToken(lltok::comma, "expected ',' after select value") ||
3224 ParseTypeAndValue(Op2, PFS))
3227 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2))
3228 return Error(Loc, Reason);
3230 Inst = SelectInst::Create(Op0, Op1, Op2);
3235 /// ::= 'va_arg' TypeAndValue ',' Type
3236 bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) {
3238 PATypeHolder EltTy(Type::getVoidTy(Context));
3240 if (ParseTypeAndValue(Op, PFS) ||
3241 ParseToken(lltok::comma, "expected ',' after vaarg operand") ||
3242 ParseType(EltTy, TypeLoc))
3245 if (!EltTy->isFirstClassType())
3246 return Error(TypeLoc, "va_arg requires operand with first class type");
3248 Inst = new VAArgInst(Op, EltTy);
3252 /// ParseExtractElement
3253 /// ::= 'extractelement' TypeAndValue ',' TypeAndValue
3254 bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) {
3257 if (ParseTypeAndValue(Op0, Loc, PFS) ||
3258 ParseToken(lltok::comma, "expected ',' after extract value") ||
3259 ParseTypeAndValue(Op1, PFS))
3262 if (!ExtractElementInst::isValidOperands(Op0, Op1))
3263 return Error(Loc, "invalid extractelement operands");
3265 Inst = ExtractElementInst::Create(Op0, Op1);
3269 /// ParseInsertElement
3270 /// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue
3271 bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) {
3273 Value *Op0, *Op1, *Op2;
3274 if (ParseTypeAndValue(Op0, Loc, PFS) ||
3275 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
3276 ParseTypeAndValue(Op1, PFS) ||
3277 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
3278 ParseTypeAndValue(Op2, PFS))
3281 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2))
3282 return Error(Loc, "invalid insertelement operands");
3284 Inst = InsertElementInst::Create(Op0, Op1, Op2);
3288 /// ParseShuffleVector
3289 /// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue
3290 bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) {
3292 Value *Op0, *Op1, *Op2;
3293 if (ParseTypeAndValue(Op0, Loc, PFS) ||
3294 ParseToken(lltok::comma, "expected ',' after shuffle mask") ||
3295 ParseTypeAndValue(Op1, PFS) ||
3296 ParseToken(lltok::comma, "expected ',' after shuffle value") ||
3297 ParseTypeAndValue(Op2, PFS))
3300 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2))
3301 return Error(Loc, "invalid extractelement operands");
3303 Inst = new ShuffleVectorInst(Op0, Op1, Op2);
3308 /// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')*
3309 bool LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) {
3310 PATypeHolder Ty(Type::getVoidTy(Context));
3312 LocTy TypeLoc = Lex.getLoc();
3314 if (ParseType(Ty) ||
3315 ParseToken(lltok::lsquare, "expected '[' in phi value list") ||
3316 ParseValue(Ty, Op0, PFS) ||
3317 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
3318 ParseValue(Type::getLabelTy(Context), Op1, PFS) ||
3319 ParseToken(lltok::rsquare, "expected ']' in phi value list"))
3322 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals;
3324 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1)));
3326 if (!EatIfPresent(lltok::comma))
3329 if (Lex.getKind() == lltok::NamedOrCustomMD)
3332 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") ||
3333 ParseValue(Ty, Op0, PFS) ||
3334 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
3335 ParseValue(Type::getLabelTy(Context), Op1, PFS) ||
3336 ParseToken(lltok::rsquare, "expected ']' in phi value list"))
3340 if (Lex.getKind() == lltok::NamedOrCustomMD)
3341 if (ParseOptionalCustomMetadata()) return true;
3343 if (!Ty->isFirstClassType())
3344 return Error(TypeLoc, "phi node must have first class type");
3346 PHINode *PN = PHINode::Create(Ty);
3347 PN->reserveOperandSpace(PHIVals.size());
3348 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i)
3349 PN->addIncoming(PHIVals[i].first, PHIVals[i].second);
3355 /// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value
3356 /// ParameterList OptionalAttrs
3357 bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS,
3359 unsigned RetAttrs, FnAttrs;
3361 PATypeHolder RetType(Type::getVoidTy(Context));
3364 SmallVector<ParamInfo, 16> ArgList;
3365 LocTy CallLoc = Lex.getLoc();
3367 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) ||
3368 ParseOptionalCallingConv(CC) ||
3369 ParseOptionalAttrs(RetAttrs, 1) ||
3370 ParseType(RetType, RetTypeLoc, true /*void allowed*/) ||
3371 ParseValID(CalleeID) ||
3372 ParseParameterList(ArgList, PFS) ||
3373 ParseOptionalAttrs(FnAttrs, 2))
3376 // If RetType is a non-function pointer type, then this is the short syntax
3377 // for the call, which means that RetType is just the return type. Infer the
3378 // rest of the function argument types from the arguments that are present.
3379 const PointerType *PFTy = 0;
3380 const FunctionType *Ty = 0;
3381 if (!(PFTy = dyn_cast<PointerType>(RetType)) ||
3382 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
3383 // Pull out the types of all of the arguments...
3384 std::vector<const Type*> ParamTypes;
3385 for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
3386 ParamTypes.push_back(ArgList[i].V->getType());
3388 if (!FunctionType::isValidReturnType(RetType))
3389 return Error(RetTypeLoc, "Invalid result type for LLVM function");
3391 Ty = FunctionType::get(RetType, ParamTypes, false);
3392 PFTy = PointerType::getUnqual(Ty);
3395 // Look up the callee.
3397 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true;
3399 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional
3400 // function attributes.
3401 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg;
3402 if (FnAttrs & ObsoleteFuncAttrs) {
3403 RetAttrs |= FnAttrs & ObsoleteFuncAttrs;
3404 FnAttrs &= ~ObsoleteFuncAttrs;
3407 // Set up the Attributes for the function.
3408 SmallVector<AttributeWithIndex, 8> Attrs;
3409 if (RetAttrs != Attribute::None)
3410 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs));
3412 SmallVector<Value*, 8> Args;
3414 // Loop through FunctionType's arguments and ensure they are specified
3415 // correctly. Also, gather any parameter attributes.
3416 FunctionType::param_iterator I = Ty->param_begin();
3417 FunctionType::param_iterator E = Ty->param_end();
3418 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
3419 const Type *ExpectedTy = 0;
3422 } else if (!Ty->isVarArg()) {
3423 return Error(ArgList[i].Loc, "too many arguments specified");
3426 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType())
3427 return Error(ArgList[i].Loc, "argument is not of expected type '" +
3428 ExpectedTy->getDescription() + "'");
3429 Args.push_back(ArgList[i].V);
3430 if (ArgList[i].Attrs != Attribute::None)
3431 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs));
3435 return Error(CallLoc, "not enough parameters specified for call");
3437 if (FnAttrs != Attribute::None)
3438 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs));
3440 // Finish off the Attributes and check them
3441 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end());
3443 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end());
3444 CI->setTailCall(isTail);
3445 CI->setCallingConv(CC);
3446 CI->setAttributes(PAL);
3451 //===----------------------------------------------------------------------===//
3452 // Memory Instructions.
3453 //===----------------------------------------------------------------------===//
3456 /// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)?
3457 /// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)?
3458 bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS,
3459 BasicBlock* BB, bool isAlloca) {
3460 PATypeHolder Ty(Type::getVoidTy(Context));
3463 unsigned Alignment = 0;
3464 if (ParseType(Ty)) return true;
3466 if (EatIfPresent(lltok::comma)) {
3467 if (Lex.getKind() == lltok::kw_align
3468 || Lex.getKind() == lltok::NamedOrCustomMD) {
3469 if (ParseOptionalInfo(Alignment)) return true;
3471 if (ParseTypeAndValue(Size, SizeLoc, PFS)) return true;
3472 if (EatIfPresent(lltok::comma))
3473 if (ParseOptionalInfo(Alignment)) return true;
3477 if (Size && Size->getType() != Type::getInt32Ty(Context))
3478 return Error(SizeLoc, "element count must be i32");
3481 Inst = new AllocaInst(Ty, Size, Alignment);
3485 // Autoupgrade old malloc instruction to malloc call.
3486 // FIXME: Remove in LLVM 3.0.
3487 const Type *IntPtrTy = Type::getInt32Ty(Context);
3488 const Type *Int8PtrTy = Type::getInt8PtrTy(Context);
3490 // Prototype malloc as "void *(int32)".
3491 // This function is renamed as "malloc" in ValidateEndOfModule().
3492 MallocF = cast<Function>(M->getOrInsertFunction(NULL, Int8PtrTy,
3494 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, Size, MallocF);
3499 /// ::= 'free' TypeAndValue
3500 bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS) {
3501 Value *Val; LocTy Loc;
3502 if (ParseTypeAndValue(Val, Loc, PFS)) return true;
3503 if (!isa<PointerType>(Val->getType()))
3504 return Error(Loc, "operand to free must be a pointer");
3505 Inst = new FreeInst(Val);
3510 /// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)?
3511 bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS,
3513 Value *Val; LocTy Loc;
3514 unsigned Alignment = 0;
3515 if (ParseTypeAndValue(Val, Loc, PFS)) return true;
3517 if (EatIfPresent(lltok::comma))
3518 if (ParseOptionalInfo(Alignment)) return true;
3520 if (!isa<PointerType>(Val->getType()) ||
3521 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType())
3522 return Error(Loc, "load operand must be a pointer to a first class type");
3524 Inst = new LoadInst(Val, "", isVolatile, Alignment);
3529 /// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)?
3530 bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS,
3532 Value *Val, *Ptr; LocTy Loc, PtrLoc;
3533 unsigned Alignment = 0;
3534 if (ParseTypeAndValue(Val, Loc, PFS) ||
3535 ParseToken(lltok::comma, "expected ',' after store operand") ||
3536 ParseTypeAndValue(Ptr, PtrLoc, PFS))
3539 if (EatIfPresent(lltok::comma))
3540 if (ParseOptionalInfo(Alignment)) return true;
3542 if (!isa<PointerType>(Ptr->getType()))
3543 return Error(PtrLoc, "store operand must be a pointer");
3544 if (!Val->getType()->isFirstClassType())
3545 return Error(Loc, "store operand must be a first class value");
3546 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType())
3547 return Error(Loc, "stored value and pointer type do not match");
3549 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment);
3554 /// ::= 'getresult' TypeAndValue ',' i32
3555 /// FIXME: Remove support for getresult in LLVM 3.0
3556 bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) {
3557 Value *Val; LocTy ValLoc, EltLoc;
3559 if (ParseTypeAndValue(Val, ValLoc, PFS) ||
3560 ParseToken(lltok::comma, "expected ',' after getresult operand") ||
3561 ParseUInt32(Element, EltLoc))
3564 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType()))
3565 return Error(ValLoc, "getresult inst requires an aggregate operand");
3566 if (!ExtractValueInst::getIndexedType(Val->getType(), Element))
3567 return Error(EltLoc, "invalid getresult index for value");
3568 Inst = ExtractValueInst::Create(Val, Element);
3572 /// ParseGetElementPtr
3573 /// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)*
3574 bool LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) {
3575 Value *Ptr, *Val; LocTy Loc, EltLoc;
3577 bool InBounds = EatIfPresent(lltok::kw_inbounds);
3579 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true;
3581 if (!isa<PointerType>(Ptr->getType()))
3582 return Error(Loc, "base of getelementptr must be a pointer");
3584 SmallVector<Value*, 16> Indices;
3585 while (EatIfPresent(lltok::comma)) {
3586 if (Lex.getKind() == lltok::NamedOrCustomMD)
3588 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true;
3589 if (!isa<IntegerType>(Val->getType()))
3590 return Error(EltLoc, "getelementptr index must be an integer");
3591 Indices.push_back(Val);
3593 if (Lex.getKind() == lltok::NamedOrCustomMD)
3594 if (ParseOptionalCustomMetadata()) return true;
3596 if (!GetElementPtrInst::getIndexedType(Ptr->getType(),
3597 Indices.begin(), Indices.end()))
3598 return Error(Loc, "invalid getelementptr indices");
3599 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end());
3601 cast<GetElementPtrInst>(Inst)->setIsInBounds(true);
3605 /// ParseExtractValue
3606 /// ::= 'extractvalue' TypeAndValue (',' uint32)+
3607 bool LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) {
3608 Value *Val; LocTy Loc;
3609 SmallVector<unsigned, 4> Indices;
3610 if (ParseTypeAndValue(Val, Loc, PFS) ||
3611 ParseIndexList(Indices))
3614 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType()))
3615 return Error(Loc, "extractvalue operand must be array or struct");
3617 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(),
3619 return Error(Loc, "invalid indices for extractvalue");
3620 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end());
3624 /// ParseInsertValue
3625 /// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+
3626 bool LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) {
3627 Value *Val0, *Val1; LocTy Loc0, Loc1;
3628 SmallVector<unsigned, 4> Indices;
3629 if (ParseTypeAndValue(Val0, Loc0, PFS) ||
3630 ParseToken(lltok::comma, "expected comma after insertvalue operand") ||
3631 ParseTypeAndValue(Val1, Loc1, PFS) ||
3632 ParseIndexList(Indices))
3635 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType()))
3636 return Error(Loc0, "extractvalue operand must be array or struct");
3638 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(),
3640 return Error(Loc0, "invalid indices for insertvalue");
3641 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end());
3645 //===----------------------------------------------------------------------===//
3646 // Embedded metadata.
3647 //===----------------------------------------------------------------------===//
3649 /// ParseMDNodeVector
3650 /// ::= Element (',' Element)*
3652 /// ::= 'null' | TypeAndValue
3653 bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) {
3654 assert(Lex.getKind() == lltok::lbrace);
3658 if (Lex.getKind() == lltok::kw_null) {
3662 PATypeHolder Ty(Type::getVoidTy(Context));
3663 if (ParseType(Ty)) return true;
3664 if (Lex.getKind() == lltok::Metadata) {
3666 MetadataBase *Node = 0;
3667 if (!ParseMDNode(Node))
3670 MetadataBase *MDS = 0;
3671 if (ParseMDString(MDS)) return true;
3676 if (ParseGlobalValue(Ty, C)) return true;
3681 } while (EatIfPresent(lltok::comma));