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"
32 /// Run: module ::= toplevelentity*
33 bool LLParser::Run() {
37 return ParseTopLevelEntities() ||
38 ValidateEndOfModule();
41 /// ValidateEndOfModule - Do final validity and sanity checks at the end of the
43 bool LLParser::ValidateEndOfModule() {
44 // Update auto-upgraded malloc calls to "malloc".
45 // FIXME: Remove in LLVM 3.0.
47 MallocF->setName("malloc");
48 // If setName() does not set the name to "malloc", then there is already a
49 // declaration of "malloc". In that case, iterate over all calls to MallocF
50 // and get them to call the declared "malloc" instead.
51 if (MallocF->getName() != "malloc") {
52 Constant *RealMallocF = M->getFunction("malloc");
53 if (RealMallocF->getType() != MallocF->getType())
54 RealMallocF = ConstantExpr::getBitCast(RealMallocF, MallocF->getType());
55 MallocF->replaceAllUsesWith(RealMallocF);
56 MallocF->eraseFromParent();
62 // If there are entries in ForwardRefBlockAddresses at this point, they are
63 // references after the function was defined. Resolve those now.
64 while (!ForwardRefBlockAddresses.empty()) {
65 // Okay, we are referencing an already-parsed function, resolve them now.
67 const ValID &Fn = ForwardRefBlockAddresses.begin()->first;
68 if (Fn.Kind == ValID::t_GlobalName)
69 TheFn = M->getFunction(Fn.StrVal);
70 else if (Fn.UIntVal < NumberedVals.size())
71 TheFn = dyn_cast<Function>(NumberedVals[Fn.UIntVal]);
74 return Error(Fn.Loc, "unknown function referenced by blockaddress");
76 // Resolve all these references.
77 if (ResolveForwardRefBlockAddresses(TheFn,
78 ForwardRefBlockAddresses.begin()->second,
82 ForwardRefBlockAddresses.erase(ForwardRefBlockAddresses.begin());
86 if (!ForwardRefTypes.empty())
87 return Error(ForwardRefTypes.begin()->second.second,
88 "use of undefined type named '" +
89 ForwardRefTypes.begin()->first + "'");
90 if (!ForwardRefTypeIDs.empty())
91 return Error(ForwardRefTypeIDs.begin()->second.second,
92 "use of undefined type '%" +
93 utostr(ForwardRefTypeIDs.begin()->first) + "'");
95 if (!ForwardRefVals.empty())
96 return Error(ForwardRefVals.begin()->second.second,
97 "use of undefined value '@" + ForwardRefVals.begin()->first +
100 if (!ForwardRefValIDs.empty())
101 return Error(ForwardRefValIDs.begin()->second.second,
102 "use of undefined value '@" +
103 utostr(ForwardRefValIDs.begin()->first) + "'");
105 if (!ForwardRefMDNodes.empty())
106 return Error(ForwardRefMDNodes.begin()->second.second,
107 "use of undefined metadata '!" +
108 utostr(ForwardRefMDNodes.begin()->first) + "'");
111 // Look for intrinsic functions and CallInst that need to be upgraded
112 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; )
113 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove
115 // Check debug info intrinsics.
116 CheckDebugInfoIntrinsics(M);
120 bool LLParser::ResolveForwardRefBlockAddresses(Function *TheFn,
121 std::vector<std::pair<ValID, GlobalValue*> > &Refs,
122 PerFunctionState *PFS) {
123 // Loop over all the references, resolving them.
124 for (unsigned i = 0, e = Refs.size(); i != e; ++i) {
127 if (Refs[i].first.Kind == ValID::t_LocalName)
128 Res = PFS->GetBB(Refs[i].first.StrVal, Refs[i].first.Loc);
130 Res = PFS->GetBB(Refs[i].first.UIntVal, Refs[i].first.Loc);
131 } else if (Refs[i].first.Kind == ValID::t_LocalID) {
132 return Error(Refs[i].first.Loc,
133 "cannot take address of numeric label after the function is defined");
135 Res = dyn_cast_or_null<BasicBlock>(
136 TheFn->getValueSymbolTable().lookup(Refs[i].first.StrVal));
140 return Error(Refs[i].first.Loc,
141 "referenced value is not a basic block");
143 // Get the BlockAddress for this and update references to use it.
144 BlockAddress *BA = BlockAddress::get(TheFn, Res);
145 Refs[i].second->replaceAllUsesWith(BA);
146 Refs[i].second->eraseFromParent();
152 //===----------------------------------------------------------------------===//
153 // Top-Level Entities
154 //===----------------------------------------------------------------------===//
156 bool LLParser::ParseTopLevelEntities() {
158 switch (Lex.getKind()) {
159 default: return TokError("expected top-level entity");
160 case lltok::Eof: return false;
161 //case lltok::kw_define:
162 case lltok::kw_declare: if (ParseDeclare()) return true; break;
163 case lltok::kw_define: if (ParseDefine()) return true; break;
164 case lltok::kw_module: if (ParseModuleAsm()) return true; break;
165 case lltok::kw_target: if (ParseTargetDefinition()) return true; break;
166 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break;
167 case lltok::kw_type: if (ParseUnnamedType()) return true; break;
168 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break;
169 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0
170 case lltok::LocalVar: if (ParseNamedType()) return true; break;
171 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break;
172 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break;
173 case lltok::Metadata: if (ParseStandaloneMetadata()) return true; break;
174 case lltok::NamedOrCustomMD: if (ParseNamedMetadata()) return true; break;
176 // The Global variable production with no name can have many different
177 // optional leading prefixes, the production is:
178 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal
179 // OptionalAddrSpace ('constant'|'global') ...
180 case lltok::kw_private : // OptionalLinkage
181 case lltok::kw_linker_private: // OptionalLinkage
182 case lltok::kw_internal: // OptionalLinkage
183 case lltok::kw_weak: // OptionalLinkage
184 case lltok::kw_weak_odr: // OptionalLinkage
185 case lltok::kw_linkonce: // OptionalLinkage
186 case lltok::kw_linkonce_odr: // OptionalLinkage
187 case lltok::kw_appending: // OptionalLinkage
188 case lltok::kw_dllexport: // OptionalLinkage
189 case lltok::kw_common: // OptionalLinkage
190 case lltok::kw_dllimport: // OptionalLinkage
191 case lltok::kw_extern_weak: // OptionalLinkage
192 case lltok::kw_external: { // OptionalLinkage
193 unsigned Linkage, Visibility;
194 if (ParseOptionalLinkage(Linkage) ||
195 ParseOptionalVisibility(Visibility) ||
196 ParseGlobal("", SMLoc(), Linkage, true, Visibility))
200 case lltok::kw_default: // OptionalVisibility
201 case lltok::kw_hidden: // OptionalVisibility
202 case lltok::kw_protected: { // OptionalVisibility
204 if (ParseOptionalVisibility(Visibility) ||
205 ParseGlobal("", SMLoc(), 0, false, Visibility))
210 case lltok::kw_thread_local: // OptionalThreadLocal
211 case lltok::kw_addrspace: // OptionalAddrSpace
212 case lltok::kw_constant: // GlobalType
213 case lltok::kw_global: // GlobalType
214 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true;
222 /// ::= 'module' 'asm' STRINGCONSTANT
223 bool LLParser::ParseModuleAsm() {
224 assert(Lex.getKind() == lltok::kw_module);
228 if (ParseToken(lltok::kw_asm, "expected 'module asm'") ||
229 ParseStringConstant(AsmStr)) return true;
231 const std::string &AsmSoFar = M->getModuleInlineAsm();
232 if (AsmSoFar.empty())
233 M->setModuleInlineAsm(AsmStr);
235 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr);
240 /// ::= 'target' 'triple' '=' STRINGCONSTANT
241 /// ::= 'target' 'datalayout' '=' STRINGCONSTANT
242 bool LLParser::ParseTargetDefinition() {
243 assert(Lex.getKind() == lltok::kw_target);
246 default: return TokError("unknown target property");
247 case lltok::kw_triple:
249 if (ParseToken(lltok::equal, "expected '=' after target triple") ||
250 ParseStringConstant(Str))
252 M->setTargetTriple(Str);
254 case lltok::kw_datalayout:
256 if (ParseToken(lltok::equal, "expected '=' after target datalayout") ||
257 ParseStringConstant(Str))
259 M->setDataLayout(Str);
265 /// ::= 'deplibs' '=' '[' ']'
266 /// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']'
267 bool LLParser::ParseDepLibs() {
268 assert(Lex.getKind() == lltok::kw_deplibs);
270 if (ParseToken(lltok::equal, "expected '=' after deplibs") ||
271 ParseToken(lltok::lsquare, "expected '=' after deplibs"))
274 if (EatIfPresent(lltok::rsquare))
278 if (ParseStringConstant(Str)) return true;
281 while (EatIfPresent(lltok::comma)) {
282 if (ParseStringConstant(Str)) return true;
286 return ParseToken(lltok::rsquare, "expected ']' at end of list");
289 /// ParseUnnamedType:
291 /// ::= LocalVarID '=' 'type' type
292 bool LLParser::ParseUnnamedType() {
293 unsigned TypeID = NumberedTypes.size();
295 // Handle the LocalVarID form.
296 if (Lex.getKind() == lltok::LocalVarID) {
297 if (Lex.getUIntVal() != TypeID)
298 return Error(Lex.getLoc(), "type expected to be numbered '%" +
299 utostr(TypeID) + "'");
300 Lex.Lex(); // eat LocalVarID;
302 if (ParseToken(lltok::equal, "expected '=' after name"))
306 assert(Lex.getKind() == lltok::kw_type);
307 LocTy TypeLoc = Lex.getLoc();
308 Lex.Lex(); // eat kw_type
310 PATypeHolder Ty(Type::getVoidTy(Context));
311 if (ParseType(Ty)) return true;
313 // See if this type was previously referenced.
314 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator
315 FI = ForwardRefTypeIDs.find(TypeID);
316 if (FI != ForwardRefTypeIDs.end()) {
317 if (FI->second.first.get() == Ty)
318 return Error(TypeLoc, "self referential type is invalid");
320 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty);
321 Ty = FI->second.first.get();
322 ForwardRefTypeIDs.erase(FI);
325 NumberedTypes.push_back(Ty);
331 /// ::= LocalVar '=' 'type' type
332 bool LLParser::ParseNamedType() {
333 std::string Name = Lex.getStrVal();
334 LocTy NameLoc = Lex.getLoc();
335 Lex.Lex(); // eat LocalVar.
337 PATypeHolder Ty(Type::getVoidTy(Context));
339 if (ParseToken(lltok::equal, "expected '=' after name") ||
340 ParseToken(lltok::kw_type, "expected 'type' after name") ||
344 // Set the type name, checking for conflicts as we do so.
345 bool AlreadyExists = M->addTypeName(Name, Ty);
346 if (!AlreadyExists) return false;
348 // See if this type is a forward reference. We need to eagerly resolve
349 // types to allow recursive type redefinitions below.
350 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator
351 FI = ForwardRefTypes.find(Name);
352 if (FI != ForwardRefTypes.end()) {
353 if (FI->second.first.get() == Ty)
354 return Error(NameLoc, "self referential type is invalid");
356 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty);
357 Ty = FI->second.first.get();
358 ForwardRefTypes.erase(FI);
361 // Inserting a name that is already defined, get the existing name.
362 const Type *Existing = M->getTypeByName(Name);
363 assert(Existing && "Conflict but no matching type?!");
365 // Otherwise, this is an attempt to redefine a type. That's okay if
366 // the redefinition is identical to the original.
367 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0
368 if (Existing == Ty) return false;
370 // Any other kind of (non-equivalent) redefinition is an error.
371 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" +
372 Ty->getDescription() + "'");
377 /// ::= 'declare' FunctionHeader
378 bool LLParser::ParseDeclare() {
379 assert(Lex.getKind() == lltok::kw_declare);
383 return ParseFunctionHeader(F, false);
387 /// ::= 'define' FunctionHeader '{' ...
388 bool LLParser::ParseDefine() {
389 assert(Lex.getKind() == lltok::kw_define);
393 return ParseFunctionHeader(F, true) ||
394 ParseFunctionBody(*F);
400 bool LLParser::ParseGlobalType(bool &IsConstant) {
401 if (Lex.getKind() == lltok::kw_constant)
403 else if (Lex.getKind() == lltok::kw_global)
407 return TokError("expected 'global' or 'constant'");
413 /// ParseUnnamedGlobal:
414 /// OptionalVisibility ALIAS ...
415 /// OptionalLinkage OptionalVisibility ... -> global variable
416 /// GlobalID '=' OptionalVisibility ALIAS ...
417 /// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable
418 bool LLParser::ParseUnnamedGlobal() {
419 unsigned VarID = NumberedVals.size();
421 LocTy NameLoc = Lex.getLoc();
423 // Handle the GlobalID form.
424 if (Lex.getKind() == lltok::GlobalID) {
425 if (Lex.getUIntVal() != VarID)
426 return Error(Lex.getLoc(), "variable expected to be numbered '%" +
427 utostr(VarID) + "'");
428 Lex.Lex(); // eat GlobalID;
430 if (ParseToken(lltok::equal, "expected '=' after name"))
435 unsigned Linkage, Visibility;
436 if (ParseOptionalLinkage(Linkage, HasLinkage) ||
437 ParseOptionalVisibility(Visibility))
440 if (HasLinkage || Lex.getKind() != lltok::kw_alias)
441 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility);
442 return ParseAlias(Name, NameLoc, Visibility);
445 /// ParseNamedGlobal:
446 /// GlobalVar '=' OptionalVisibility ALIAS ...
447 /// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable
448 bool LLParser::ParseNamedGlobal() {
449 assert(Lex.getKind() == lltok::GlobalVar);
450 LocTy NameLoc = Lex.getLoc();
451 std::string Name = Lex.getStrVal();
455 unsigned Linkage, Visibility;
456 if (ParseToken(lltok::equal, "expected '=' in global variable") ||
457 ParseOptionalLinkage(Linkage, HasLinkage) ||
458 ParseOptionalVisibility(Visibility))
461 if (HasLinkage || Lex.getKind() != lltok::kw_alias)
462 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility);
463 return ParseAlias(Name, NameLoc, Visibility);
467 // ::= '!' STRINGCONSTANT
468 bool LLParser::ParseMDString(MetadataBase *&MDS) {
470 if (ParseStringConstant(Str)) return true;
471 MDS = MDString::get(Context, Str);
476 // ::= '!' MDNodeNumber
477 bool LLParser::ParseMDNode(MetadataBase *&Node) {
478 // !{ ..., !42, ... }
480 if (ParseUInt32(MID)) return true;
482 // Check existing MDNode.
483 std::map<unsigned, WeakVH>::iterator I = MetadataCache.find(MID);
484 if (I != MetadataCache.end()) {
485 Node = cast<MetadataBase>(I->second);
489 // Check known forward references.
490 std::map<unsigned, std::pair<WeakVH, LocTy> >::iterator
491 FI = ForwardRefMDNodes.find(MID);
492 if (FI != ForwardRefMDNodes.end()) {
493 Node = cast<MetadataBase>(FI->second.first);
497 // Create MDNode forward reference
498 SmallVector<Value *, 1> Elts;
499 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID);
500 Elts.push_back(MDString::get(Context, FwdRefName));
501 MDNode *FwdNode = MDNode::get(Context, Elts.data(), Elts.size());
502 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc());
507 ///ParseNamedMetadata:
508 /// !foo = !{ !1, !2 }
509 bool LLParser::ParseNamedMetadata() {
510 assert(Lex.getKind() == lltok::NamedOrCustomMD);
512 std::string Name = Lex.getStrVal();
514 if (ParseToken(lltok::equal, "expected '=' here"))
517 if (Lex.getKind() != lltok::Metadata)
518 return TokError("Expected '!' here");
521 if (Lex.getKind() != lltok::lbrace)
522 return TokError("Expected '{' here");
524 SmallVector<MetadataBase *, 8> Elts;
526 if (Lex.getKind() != lltok::Metadata)
527 return TokError("Expected '!' here");
530 if (ParseMDNode(N)) return true;
532 } while (EatIfPresent(lltok::comma));
534 if (ParseToken(lltok::rbrace, "expected end of metadata node"))
537 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M);
541 /// ParseStandaloneMetadata:
543 bool LLParser::ParseStandaloneMetadata() {
544 assert(Lex.getKind() == lltok::Metadata);
546 unsigned MetadataID = 0;
547 if (ParseUInt32(MetadataID))
549 if (MetadataCache.find(MetadataID) != MetadataCache.end())
550 return TokError("Metadata id is already used");
551 if (ParseToken(lltok::equal, "expected '=' here"))
555 PATypeHolder Ty(Type::getVoidTy(Context));
556 if (ParseType(Ty, TyLoc))
559 if (Lex.getKind() != lltok::Metadata)
560 return TokError("Expected metadata here");
563 if (Lex.getKind() != lltok::lbrace)
564 return TokError("Expected '{' here");
566 SmallVector<Value *, 16> Elts;
567 if (ParseMDNodeVector(Elts)
568 || ParseToken(lltok::rbrace, "expected end of metadata node"))
571 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size());
572 MetadataCache[MetadataID] = Init;
573 std::map<unsigned, std::pair<WeakVH, LocTy> >::iterator
574 FI = ForwardRefMDNodes.find(MetadataID);
575 if (FI != ForwardRefMDNodes.end()) {
576 MDNode *FwdNode = cast<MDNode>(FI->second.first);
577 FwdNode->replaceAllUsesWith(Init);
578 ForwardRefMDNodes.erase(FI);
584 /// ParseInlineMetadata:
588 bool LLParser::ParseInlineMetadata(Value *&V, PerFunctionState &PFS) {
589 assert(Lex.getKind() == lltok::Metadata && "Only for Metadata");
593 if (Lex.getKind() == lltok::lbrace) {
595 if (ParseTypeAndValue(V, PFS) ||
596 ParseToken(lltok::rbrace, "expected end of metadata node"))
599 Value *Vals[] = { V };
600 V = MDNode::get(Context, Vals, 1);
604 // Standalone metadata reference
605 // !{ ..., !42, ... }
606 if (!ParseMDNode((MetadataBase *&)V))
610 // '!' STRINGCONSTANT
611 if (ParseMDString((MetadataBase *&)V)) return true;
616 /// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee
619 /// ::= 'bitcast' '(' TypeAndValue 'to' Type ')'
620 /// ::= 'getelementptr' 'inbounds'? '(' ... ')'
622 /// Everything through visibility has already been parsed.
624 bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc,
625 unsigned Visibility) {
626 assert(Lex.getKind() == lltok::kw_alias);
629 LocTy LinkageLoc = Lex.getLoc();
630 if (ParseOptionalLinkage(Linkage))
633 if (Linkage != GlobalValue::ExternalLinkage &&
634 Linkage != GlobalValue::WeakAnyLinkage &&
635 Linkage != GlobalValue::WeakODRLinkage &&
636 Linkage != GlobalValue::InternalLinkage &&
637 Linkage != GlobalValue::PrivateLinkage &&
638 Linkage != GlobalValue::LinkerPrivateLinkage)
639 return Error(LinkageLoc, "invalid linkage type for alias");
642 LocTy AliaseeLoc = Lex.getLoc();
643 if (Lex.getKind() != lltok::kw_bitcast &&
644 Lex.getKind() != lltok::kw_getelementptr) {
645 if (ParseGlobalTypeAndValue(Aliasee)) return true;
647 // The bitcast dest type is not present, it is implied by the dest type.
649 if (ParseValID(ID)) return true;
650 if (ID.Kind != ValID::t_Constant)
651 return Error(AliaseeLoc, "invalid aliasee");
652 Aliasee = ID.ConstantVal;
655 if (!isa<PointerType>(Aliasee->getType()))
656 return Error(AliaseeLoc, "alias must have pointer type");
658 // Okay, create the alias but do not insert it into the module yet.
659 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(),
660 (GlobalValue::LinkageTypes)Linkage, Name,
662 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility);
664 // See if this value already exists in the symbol table. If so, it is either
665 // a redefinition or a definition of a forward reference.
666 if (GlobalValue *Val = M->getNamedValue(Name)) {
667 // See if this was a redefinition. If so, there is no entry in
669 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator
670 I = ForwardRefVals.find(Name);
671 if (I == ForwardRefVals.end())
672 return Error(NameLoc, "redefinition of global named '@" + Name + "'");
674 // Otherwise, this was a definition of forward ref. Verify that types
676 if (Val->getType() != GA->getType())
677 return Error(NameLoc,
678 "forward reference and definition of alias have different types");
680 // If they agree, just RAUW the old value with the alias and remove the
682 Val->replaceAllUsesWith(GA);
683 Val->eraseFromParent();
684 ForwardRefVals.erase(I);
687 // Insert into the module, we know its name won't collide now.
688 M->getAliasList().push_back(GA);
689 assert(GA->getNameStr() == Name && "Should not be a name conflict!");
695 /// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal
696 /// OptionalAddrSpace GlobalType Type Const
697 /// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal
698 /// OptionalAddrSpace GlobalType Type Const
700 /// Everything through visibility has been parsed already.
702 bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc,
703 unsigned Linkage, bool HasLinkage,
704 unsigned Visibility) {
706 bool ThreadLocal, IsConstant;
709 PATypeHolder Ty(Type::getVoidTy(Context));
710 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) ||
711 ParseOptionalAddrSpace(AddrSpace) ||
712 ParseGlobalType(IsConstant) ||
713 ParseType(Ty, TyLoc))
716 // If the linkage is specified and is external, then no initializer is
719 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage &&
720 Linkage != GlobalValue::ExternalWeakLinkage &&
721 Linkage != GlobalValue::ExternalLinkage)) {
722 if (ParseGlobalValue(Ty, Init))
726 if (isa<FunctionType>(Ty) || Ty->isLabelTy())
727 return Error(TyLoc, "invalid type for global variable");
729 GlobalVariable *GV = 0;
731 // See if the global was forward referenced, if so, use the global.
733 if (GlobalValue *GVal = M->getNamedValue(Name)) {
734 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal))
735 return Error(NameLoc, "redefinition of global '@" + Name + "'");
736 GV = cast<GlobalVariable>(GVal);
739 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator
740 I = ForwardRefValIDs.find(NumberedVals.size());
741 if (I != ForwardRefValIDs.end()) {
742 GV = cast<GlobalVariable>(I->second.first);
743 ForwardRefValIDs.erase(I);
748 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0,
749 Name, 0, false, AddrSpace);
751 if (GV->getType()->getElementType() != Ty)
753 "forward reference and definition of global have different types");
755 // Move the forward-reference to the correct spot in the module.
756 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV);
760 NumberedVals.push_back(GV);
762 // Set the parsed properties on the global.
764 GV->setInitializer(Init);
765 GV->setConstant(IsConstant);
766 GV->setLinkage((GlobalValue::LinkageTypes)Linkage);
767 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility);
768 GV->setThreadLocal(ThreadLocal);
770 // Parse attributes on the global.
771 while (Lex.getKind() == lltok::comma) {
774 if (Lex.getKind() == lltok::kw_section) {
776 GV->setSection(Lex.getStrVal());
777 if (ParseToken(lltok::StringConstant, "expected global section string"))
779 } else if (Lex.getKind() == lltok::kw_align) {
781 if (ParseOptionalAlignment(Alignment)) return true;
782 GV->setAlignment(Alignment);
784 TokError("unknown global variable property!");
792 //===----------------------------------------------------------------------===//
793 // GlobalValue Reference/Resolution Routines.
794 //===----------------------------------------------------------------------===//
796 /// GetGlobalVal - Get a value with the specified name or ID, creating a
797 /// forward reference record if needed. This can return null if the value
798 /// exists but does not have the right type.
799 GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty,
801 const PointerType *PTy = dyn_cast<PointerType>(Ty);
803 Error(Loc, "global variable reference must have pointer type");
807 // Look this name up in the normal function symbol table.
809 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name));
811 // If this is a forward reference for the value, see if we already created a
812 // forward ref record.
814 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator
815 I = ForwardRefVals.find(Name);
816 if (I != ForwardRefVals.end())
817 Val = I->second.first;
820 // If we have the value in the symbol table or fwd-ref table, return it.
822 if (Val->getType() == Ty) return Val;
823 Error(Loc, "'@" + Name + "' defined with type '" +
824 Val->getType()->getDescription() + "'");
828 // Otherwise, create a new forward reference for this value and remember it.
830 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) {
831 // Function types can return opaque but functions can't.
832 if (isa<OpaqueType>(FT->getReturnType())) {
833 Error(Loc, "function may not return opaque type");
837 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M);
839 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false,
840 GlobalValue::ExternalWeakLinkage, 0, Name);
843 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
847 GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) {
848 const PointerType *PTy = dyn_cast<PointerType>(Ty);
850 Error(Loc, "global variable reference must have pointer type");
854 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0;
856 // If this is a forward reference for the value, see if we already created a
857 // forward ref record.
859 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator
860 I = ForwardRefValIDs.find(ID);
861 if (I != ForwardRefValIDs.end())
862 Val = I->second.first;
865 // If we have the value in the symbol table or fwd-ref table, return it.
867 if (Val->getType() == Ty) return Val;
868 Error(Loc, "'@" + utostr(ID) + "' defined with type '" +
869 Val->getType()->getDescription() + "'");
873 // Otherwise, create a new forward reference for this value and remember it.
875 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) {
876 // Function types can return opaque but functions can't.
877 if (isa<OpaqueType>(FT->getReturnType())) {
878 Error(Loc, "function may not return opaque type");
881 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M);
883 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false,
884 GlobalValue::ExternalWeakLinkage, 0, "");
887 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc);
892 //===----------------------------------------------------------------------===//
894 //===----------------------------------------------------------------------===//
896 /// ParseToken - If the current token has the specified kind, eat it and return
897 /// success. Otherwise, emit the specified error and return failure.
898 bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) {
899 if (Lex.getKind() != T)
900 return TokError(ErrMsg);
905 /// ParseStringConstant
906 /// ::= StringConstant
907 bool LLParser::ParseStringConstant(std::string &Result) {
908 if (Lex.getKind() != lltok::StringConstant)
909 return TokError("expected string constant");
910 Result = Lex.getStrVal();
917 bool LLParser::ParseUInt32(unsigned &Val) {
918 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
919 return TokError("expected integer");
920 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1);
921 if (Val64 != unsigned(Val64))
922 return TokError("expected 32-bit integer (too large)");
929 /// ParseOptionalAddrSpace
931 /// := 'addrspace' '(' uint32 ')'
932 bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) {
934 if (!EatIfPresent(lltok::kw_addrspace))
936 return ParseToken(lltok::lparen, "expected '(' in address space") ||
937 ParseUInt32(AddrSpace) ||
938 ParseToken(lltok::rparen, "expected ')' in address space");
941 /// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind
942 /// indicates what kind of attribute list this is: 0: function arg, 1: result,
943 /// 2: function attr.
944 /// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0
945 bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) {
946 Attrs = Attribute::None;
947 LocTy AttrLoc = Lex.getLoc();
950 switch (Lex.getKind()) {
953 // Treat these as signext/zeroext if they occur in the argument list after
954 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the
955 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant
957 // FIXME: REMOVE THIS IN LLVM 3.0
959 if (Lex.getKind() == lltok::kw_sext)
960 Attrs |= Attribute::SExt;
962 Attrs |= Attribute::ZExt;
966 default: // End of attributes.
967 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly))
968 return Error(AttrLoc, "invalid use of function-only attribute");
970 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly))
971 return Error(AttrLoc, "invalid use of parameter-only attribute");
974 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break;
975 case lltok::kw_signext: Attrs |= Attribute::SExt; break;
976 case lltok::kw_inreg: Attrs |= Attribute::InReg; break;
977 case lltok::kw_sret: Attrs |= Attribute::StructRet; break;
978 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break;
979 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break;
980 case lltok::kw_byval: Attrs |= Attribute::ByVal; break;
981 case lltok::kw_nest: Attrs |= Attribute::Nest; break;
983 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break;
984 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break;
985 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break;
986 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break;
987 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break;
988 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break;
989 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break;
990 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break;
991 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break;
992 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break;
993 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break;
994 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break;
995 case lltok::kw_naked: Attrs |= Attribute::Naked; break;
997 case lltok::kw_align: {
999 if (ParseOptionalAlignment(Alignment))
1001 Attrs |= Attribute::constructAlignmentFromInt(Alignment);
1009 /// ParseOptionalLinkage
1012 /// ::= 'linker_private'
1017 /// ::= 'linkonce_odr'
1022 /// ::= 'extern_weak'
1024 bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) {
1026 switch (Lex.getKind()) {
1027 default: Res=GlobalValue::ExternalLinkage; return false;
1028 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break;
1029 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break;
1030 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break;
1031 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break;
1032 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break;
1033 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break;
1034 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break;
1035 case lltok::kw_available_externally:
1036 Res = GlobalValue::AvailableExternallyLinkage;
1038 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break;
1039 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break;
1040 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break;
1041 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break;
1042 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break;
1043 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break;
1050 /// ParseOptionalVisibility
1056 bool LLParser::ParseOptionalVisibility(unsigned &Res) {
1057 switch (Lex.getKind()) {
1058 default: Res = GlobalValue::DefaultVisibility; return false;
1059 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break;
1060 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break;
1061 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break;
1067 /// ParseOptionalCallingConv
1072 /// ::= 'x86_stdcallcc'
1073 /// ::= 'x86_fastcallcc'
1074 /// ::= 'arm_apcscc'
1075 /// ::= 'arm_aapcscc'
1076 /// ::= 'arm_aapcs_vfpcc'
1077 /// ::= 'msp430_intrcc'
1080 bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) {
1081 switch (Lex.getKind()) {
1082 default: CC = CallingConv::C; return false;
1083 case lltok::kw_ccc: CC = CallingConv::C; break;
1084 case lltok::kw_fastcc: CC = CallingConv::Fast; break;
1085 case lltok::kw_coldcc: CC = CallingConv::Cold; break;
1086 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break;
1087 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break;
1088 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break;
1089 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break;
1090 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break;
1091 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break;
1092 case lltok::kw_cc: {
1093 unsigned ArbitraryCC;
1095 if (ParseUInt32(ArbitraryCC)) {
1098 CC = static_cast<CallingConv::ID>(ArbitraryCC);
1108 /// ParseOptionalCustomMetadata
1111 bool LLParser::ParseOptionalCustomMetadata() {
1112 if (Lex.getKind() != lltok::NamedOrCustomMD)
1115 std::string Name = Lex.getStrVal();
1118 if (Lex.getKind() != lltok::Metadata)
1119 return TokError("Expected '!' here");
1123 if (ParseMDNode(Node)) return true;
1125 MetadataContext &TheMetadata = M->getContext().getMetadata();
1126 unsigned MDK = TheMetadata.getMDKind(Name.c_str());
1128 MDK = TheMetadata.registerMDKind(Name.c_str());
1129 MDsOnInst.push_back(std::make_pair(MDK, cast<MDNode>(Node)));
1134 /// ParseOptionalAlignment
1137 bool LLParser::ParseOptionalAlignment(unsigned &Alignment) {
1139 if (!EatIfPresent(lltok::kw_align))
1141 LocTy AlignLoc = Lex.getLoc();
1142 if (ParseUInt32(Alignment)) return true;
1143 if (!isPowerOf2_32(Alignment))
1144 return Error(AlignLoc, "alignment is not a power of two");
1148 /// ParseOptionalInfo
1149 /// ::= OptionalInfo (',' OptionalInfo)+
1150 bool LLParser::ParseOptionalInfo(unsigned &Alignment) {
1152 // FIXME: Handle customized metadata info attached with an instruction.
1154 if (Lex.getKind() == lltok::NamedOrCustomMD) {
1155 if (ParseOptionalCustomMetadata()) return true;
1156 } else if (Lex.getKind() == lltok::kw_align) {
1157 if (ParseOptionalAlignment(Alignment)) return true;
1160 } while (EatIfPresent(lltok::comma));
1167 /// ::= (',' uint32)+
1168 bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices) {
1169 if (Lex.getKind() != lltok::comma)
1170 return TokError("expected ',' as start of index list");
1172 while (EatIfPresent(lltok::comma)) {
1173 if (Lex.getKind() == lltok::NamedOrCustomMD)
1176 if (ParseUInt32(Idx)) return true;
1177 Indices.push_back(Idx);
1183 //===----------------------------------------------------------------------===//
1185 //===----------------------------------------------------------------------===//
1187 /// ParseType - Parse and resolve a full type.
1188 bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) {
1189 LocTy TypeLoc = Lex.getLoc();
1190 if (ParseTypeRec(Result)) return true;
1192 // Verify no unresolved uprefs.
1193 if (!UpRefs.empty())
1194 return Error(UpRefs.back().Loc, "invalid unresolved type up reference");
1196 if (!AllowVoid && Result.get()->isVoidTy())
1197 return Error(TypeLoc, "void type only allowed for function results");
1202 /// HandleUpRefs - Every time we finish a new layer of types, this function is
1203 /// called. It loops through the UpRefs vector, which is a list of the
1204 /// currently active types. For each type, if the up-reference is contained in
1205 /// the newly completed type, we decrement the level count. When the level
1206 /// count reaches zero, the up-referenced type is the type that is passed in:
1207 /// thus we can complete the cycle.
1209 PATypeHolder LLParser::HandleUpRefs(const Type *ty) {
1210 // If Ty isn't abstract, or if there are no up-references in it, then there is
1211 // nothing to resolve here.
1212 if (!ty->isAbstract() || UpRefs.empty()) return ty;
1214 PATypeHolder Ty(ty);
1216 errs() << "Type '" << Ty->getDescription()
1217 << "' newly formed. Resolving upreferences.\n"
1218 << UpRefs.size() << " upreferences active!\n";
1221 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes
1222 // to zero), we resolve them all together before we resolve them to Ty. At
1223 // the end of the loop, if there is anything to resolve to Ty, it will be in
1225 OpaqueType *TypeToResolve = 0;
1227 for (unsigned i = 0; i != UpRefs.size(); ++i) {
1228 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'.
1230 std::find(Ty->subtype_begin(), Ty->subtype_end(),
1231 UpRefs[i].LastContainedTy) != Ty->subtype_end();
1234 errs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", "
1235 << UpRefs[i].LastContainedTy->getDescription() << ") = "
1236 << (ContainsType ? "true" : "false")
1237 << " level=" << UpRefs[i].NestingLevel << "\n";
1242 // Decrement level of upreference
1243 unsigned Level = --UpRefs[i].NestingLevel;
1244 UpRefs[i].LastContainedTy = Ty;
1246 // If the Up-reference has a non-zero level, it shouldn't be resolved yet.
1251 errs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n";
1254 TypeToResolve = UpRefs[i].UpRefTy;
1256 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve);
1257 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list.
1258 --i; // Do not skip the next element.
1262 TypeToResolve->refineAbstractTypeTo(Ty);
1268 /// ParseTypeRec - The recursive function used to process the internal
1269 /// implementation details of types.
1270 bool LLParser::ParseTypeRec(PATypeHolder &Result) {
1271 switch (Lex.getKind()) {
1273 return TokError("expected type");
1275 // TypeRec ::= 'float' | 'void' (etc)
1276 Result = Lex.getTyVal();
1279 case lltok::kw_opaque:
1280 // TypeRec ::= 'opaque'
1281 Result = OpaqueType::get(Context);
1285 // TypeRec ::= '{' ... '}'
1286 if (ParseStructType(Result, false))
1289 case lltok::lsquare:
1290 // TypeRec ::= '[' ... ']'
1291 Lex.Lex(); // eat the lsquare.
1292 if (ParseArrayVectorType(Result, false))
1295 case lltok::less: // Either vector or packed struct.
1296 // TypeRec ::= '<' ... '>'
1298 if (Lex.getKind() == lltok::lbrace) {
1299 if (ParseStructType(Result, true) ||
1300 ParseToken(lltok::greater, "expected '>' at end of packed struct"))
1302 } else if (ParseArrayVectorType(Result, true))
1305 case lltok::LocalVar:
1306 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0
1308 if (const Type *T = M->getTypeByName(Lex.getStrVal())) {
1311 Result = OpaqueType::get(Context);
1312 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(),
1313 std::make_pair(Result,
1315 M->addTypeName(Lex.getStrVal(), Result.get());
1320 case lltok::LocalVarID:
1322 if (Lex.getUIntVal() < NumberedTypes.size())
1323 Result = NumberedTypes[Lex.getUIntVal()];
1325 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator
1326 I = ForwardRefTypeIDs.find(Lex.getUIntVal());
1327 if (I != ForwardRefTypeIDs.end())
1328 Result = I->second.first;
1330 Result = OpaqueType::get(Context);
1331 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(),
1332 std::make_pair(Result,
1338 case lltok::backslash: {
1339 // TypeRec ::= '\' 4
1342 if (ParseUInt32(Val)) return true;
1343 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder.
1344 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT));
1350 // Parse the type suffixes.
1352 switch (Lex.getKind()) {
1354 default: return false;
1356 // TypeRec ::= TypeRec '*'
1358 if (Result.get()->isLabelTy())
1359 return TokError("basic block pointers are invalid");
1360 if (Result.get()->isVoidTy())
1361 return TokError("pointers to void are invalid; use i8* instead");
1362 if (!PointerType::isValidElementType(Result.get()))
1363 return TokError("pointer to this type is invalid");
1364 Result = HandleUpRefs(PointerType::getUnqual(Result.get()));
1368 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*'
1369 case lltok::kw_addrspace: {
1370 if (Result.get()->isLabelTy())
1371 return TokError("basic block pointers are invalid");
1372 if (Result.get()->isVoidTy())
1373 return TokError("pointers to void are invalid; use i8* instead");
1374 if (!PointerType::isValidElementType(Result.get()))
1375 return TokError("pointer to this type is invalid");
1377 if (ParseOptionalAddrSpace(AddrSpace) ||
1378 ParseToken(lltok::star, "expected '*' in address space"))
1381 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace));
1385 /// Types '(' ArgTypeListI ')' OptFuncAttrs
1387 if (ParseFunctionType(Result))
1394 /// ParseParameterList
1396 /// ::= '(' Arg (',' Arg)* ')'
1398 /// ::= Type OptionalAttributes Value OptionalAttributes
1399 bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
1400 PerFunctionState &PFS) {
1401 if (ParseToken(lltok::lparen, "expected '(' in call"))
1404 while (Lex.getKind() != lltok::rparen) {
1405 // If this isn't the first argument, we need a comma.
1406 if (!ArgList.empty() &&
1407 ParseToken(lltok::comma, "expected ',' in argument list"))
1410 // Parse the argument.
1412 PATypeHolder ArgTy(Type::getVoidTy(Context));
1413 unsigned ArgAttrs1 = Attribute::None;
1414 unsigned ArgAttrs2 = Attribute::None;
1416 if (ParseType(ArgTy, ArgLoc))
1419 if (Lex.getKind() == lltok::Metadata) {
1420 if (ParseInlineMetadata(V, PFS))
1423 if (ParseOptionalAttrs(ArgAttrs1, 0) ||
1424 ParseValue(ArgTy, V, PFS) ||
1425 // FIXME: Should not allow attributes after the argument, remove this
1427 ParseOptionalAttrs(ArgAttrs2, 3))
1430 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2));
1433 Lex.Lex(); // Lex the ')'.
1439 /// ParseArgumentList - Parse the argument list for a function type or function
1440 /// prototype. If 'inType' is true then we are parsing a FunctionType.
1441 /// ::= '(' ArgTypeListI ')'
1445 /// ::= ArgTypeList ',' '...'
1446 /// ::= ArgType (',' ArgType)*
1448 bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList,
1449 bool &isVarArg, bool inType) {
1451 assert(Lex.getKind() == lltok::lparen);
1452 Lex.Lex(); // eat the (.
1454 if (Lex.getKind() == lltok::rparen) {
1456 } else if (Lex.getKind() == lltok::dotdotdot) {
1460 LocTy TypeLoc = Lex.getLoc();
1461 PATypeHolder ArgTy(Type::getVoidTy(Context));
1465 // If we're parsing a type, use ParseTypeRec, because we allow recursive
1466 // types (such as a function returning a pointer to itself). If parsing a
1467 // function prototype, we require fully resolved types.
1468 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) ||
1469 ParseOptionalAttrs(Attrs, 0)) return true;
1471 if (ArgTy->isVoidTy())
1472 return Error(TypeLoc, "argument can not have void type");
1474 if (Lex.getKind() == lltok::LocalVar ||
1475 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0
1476 Name = Lex.getStrVal();
1480 if (!FunctionType::isValidArgumentType(ArgTy))
1481 return Error(TypeLoc, "invalid type for function argument");
1483 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name));
1485 while (EatIfPresent(lltok::comma)) {
1486 // Handle ... at end of arg list.
1487 if (EatIfPresent(lltok::dotdotdot)) {
1492 // Otherwise must be an argument type.
1493 TypeLoc = Lex.getLoc();
1494 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) ||
1495 ParseOptionalAttrs(Attrs, 0)) return true;
1497 if (ArgTy->isVoidTy())
1498 return Error(TypeLoc, "argument can not have void type");
1500 if (Lex.getKind() == lltok::LocalVar ||
1501 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0
1502 Name = Lex.getStrVal();
1508 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy))
1509 return Error(TypeLoc, "invalid type for function argument");
1511 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name));
1515 return ParseToken(lltok::rparen, "expected ')' at end of argument list");
1518 /// ParseFunctionType
1519 /// ::= Type ArgumentList OptionalAttrs
1520 bool LLParser::ParseFunctionType(PATypeHolder &Result) {
1521 assert(Lex.getKind() == lltok::lparen);
1523 if (!FunctionType::isValidReturnType(Result))
1524 return TokError("invalid function return type");
1526 std::vector<ArgInfo> ArgList;
1529 if (ParseArgumentList(ArgList, isVarArg, true) ||
1530 // FIXME: Allow, but ignore attributes on function types!
1531 // FIXME: Remove in LLVM 3.0
1532 ParseOptionalAttrs(Attrs, 2))
1535 // Reject names on the arguments lists.
1536 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
1537 if (!ArgList[i].Name.empty())
1538 return Error(ArgList[i].Loc, "argument name invalid in function type");
1539 if (!ArgList[i].Attrs != 0) {
1540 // Allow but ignore attributes on function types; this permits
1542 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0
1546 std::vector<const Type*> ArgListTy;
1547 for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
1548 ArgListTy.push_back(ArgList[i].Type);
1550 Result = HandleUpRefs(FunctionType::get(Result.get(),
1551 ArgListTy, isVarArg));
1555 /// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere.
1558 /// ::= '{' TypeRec (',' TypeRec)* '}'
1559 /// ::= '<' '{' '}' '>'
1560 /// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>'
1561 bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) {
1562 assert(Lex.getKind() == lltok::lbrace);
1563 Lex.Lex(); // Consume the '{'
1565 if (EatIfPresent(lltok::rbrace)) {
1566 Result = StructType::get(Context, Packed);
1570 std::vector<PATypeHolder> ParamsList;
1571 LocTy EltTyLoc = Lex.getLoc();
1572 if (ParseTypeRec(Result)) return true;
1573 ParamsList.push_back(Result);
1575 if (Result->isVoidTy())
1576 return Error(EltTyLoc, "struct element can not have void type");
1577 if (!StructType::isValidElementType(Result))
1578 return Error(EltTyLoc, "invalid element type for struct");
1580 while (EatIfPresent(lltok::comma)) {
1581 EltTyLoc = Lex.getLoc();
1582 if (ParseTypeRec(Result)) return true;
1584 if (Result->isVoidTy())
1585 return Error(EltTyLoc, "struct element can not have void type");
1586 if (!StructType::isValidElementType(Result))
1587 return Error(EltTyLoc, "invalid element type for struct");
1589 ParamsList.push_back(Result);
1592 if (ParseToken(lltok::rbrace, "expected '}' at end of struct"))
1595 std::vector<const Type*> ParamsListTy;
1596 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i)
1597 ParamsListTy.push_back(ParamsList[i].get());
1598 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed));
1602 /// ParseArrayVectorType - Parse an array or vector type, assuming the first
1603 /// token has already been consumed.
1605 /// ::= '[' APSINTVAL 'x' Types ']'
1606 /// ::= '<' APSINTVAL 'x' Types '>'
1607 bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) {
1608 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() ||
1609 Lex.getAPSIntVal().getBitWidth() > 64)
1610 return TokError("expected number in address space");
1612 LocTy SizeLoc = Lex.getLoc();
1613 uint64_t Size = Lex.getAPSIntVal().getZExtValue();
1616 if (ParseToken(lltok::kw_x, "expected 'x' after element count"))
1619 LocTy TypeLoc = Lex.getLoc();
1620 PATypeHolder EltTy(Type::getVoidTy(Context));
1621 if (ParseTypeRec(EltTy)) return true;
1623 if (EltTy->isVoidTy())
1624 return Error(TypeLoc, "array and vector element type cannot be void");
1626 if (ParseToken(isVector ? lltok::greater : lltok::rsquare,
1627 "expected end of sequential type"))
1632 return Error(SizeLoc, "zero element vector is illegal");
1633 if ((unsigned)Size != Size)
1634 return Error(SizeLoc, "size too large for vector");
1635 if (!VectorType::isValidElementType(EltTy))
1636 return Error(TypeLoc, "vector element type must be fp or integer");
1637 Result = VectorType::get(EltTy, unsigned(Size));
1639 if (!ArrayType::isValidElementType(EltTy))
1640 return Error(TypeLoc, "invalid array element type");
1641 Result = HandleUpRefs(ArrayType::get(EltTy, Size));
1646 //===----------------------------------------------------------------------===//
1647 // Function Semantic Analysis.
1648 //===----------------------------------------------------------------------===//
1650 LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f,
1652 : P(p), F(f), FunctionNumber(functionNumber) {
1654 // Insert unnamed arguments into the NumberedVals list.
1655 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end();
1658 NumberedVals.push_back(AI);
1661 LLParser::PerFunctionState::~PerFunctionState() {
1662 // If there were any forward referenced non-basicblock values, delete them.
1663 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator
1664 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I)
1665 if (!isa<BasicBlock>(I->second.first)) {
1666 I->second.first->replaceAllUsesWith(
1667 UndefValue::get(I->second.first->getType()));
1668 delete I->second.first;
1669 I->second.first = 0;
1672 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator
1673 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I)
1674 if (!isa<BasicBlock>(I->second.first)) {
1675 I->second.first->replaceAllUsesWith(
1676 UndefValue::get(I->second.first->getType()));
1677 delete I->second.first;
1678 I->second.first = 0;
1682 bool LLParser::PerFunctionState::FinishFunction() {
1683 // Check to see if someone took the address of labels in this block.
1684 if (!P.ForwardRefBlockAddresses.empty()) {
1686 if (!F.getName().empty()) {
1687 FunctionID.Kind = ValID::t_GlobalName;
1688 FunctionID.StrVal = F.getName();
1690 FunctionID.Kind = ValID::t_GlobalID;
1691 FunctionID.UIntVal = FunctionNumber;
1694 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator
1695 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID);
1696 if (FRBAI != P.ForwardRefBlockAddresses.end()) {
1697 // Resolve all these references.
1698 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this))
1701 P.ForwardRefBlockAddresses.erase(FRBAI);
1705 if (!ForwardRefVals.empty())
1706 return P.Error(ForwardRefVals.begin()->second.second,
1707 "use of undefined value '%" + ForwardRefVals.begin()->first +
1709 if (!ForwardRefValIDs.empty())
1710 return P.Error(ForwardRefValIDs.begin()->second.second,
1711 "use of undefined value '%" +
1712 utostr(ForwardRefValIDs.begin()->first) + "'");
1717 /// GetVal - Get a value with the specified name or ID, creating a
1718 /// forward reference record if needed. This can return null if the value
1719 /// exists but does not have the right type.
1720 Value *LLParser::PerFunctionState::GetVal(const std::string &Name,
1721 const Type *Ty, LocTy Loc) {
1722 // Look this name up in the normal function symbol table.
1723 Value *Val = F.getValueSymbolTable().lookup(Name);
1725 // If this is a forward reference for the value, see if we already created a
1726 // forward ref record.
1728 std::map<std::string, std::pair<Value*, LocTy> >::iterator
1729 I = ForwardRefVals.find(Name);
1730 if (I != ForwardRefVals.end())
1731 Val = I->second.first;
1734 // If we have the value in the symbol table or fwd-ref table, return it.
1736 if (Val->getType() == Ty) return Val;
1737 if (Ty->isLabelTy())
1738 P.Error(Loc, "'%" + Name + "' is not a basic block");
1740 P.Error(Loc, "'%" + Name + "' defined with type '" +
1741 Val->getType()->getDescription() + "'");
1745 // Don't make placeholders with invalid type.
1746 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) &&
1747 Ty != Type::getLabelTy(F.getContext())) {
1748 P.Error(Loc, "invalid use of a non-first-class type");
1752 // Otherwise, create a new forward reference for this value and remember it.
1754 if (Ty->isLabelTy())
1755 FwdVal = BasicBlock::Create(F.getContext(), Name, &F);
1757 FwdVal = new Argument(Ty, Name);
1759 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
1763 Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty,
1765 // Look this name up in the normal function symbol table.
1766 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0;
1768 // If this is a forward reference for the value, see if we already created a
1769 // forward ref record.
1771 std::map<unsigned, std::pair<Value*, LocTy> >::iterator
1772 I = ForwardRefValIDs.find(ID);
1773 if (I != ForwardRefValIDs.end())
1774 Val = I->second.first;
1777 // If we have the value in the symbol table or fwd-ref table, return it.
1779 if (Val->getType() == Ty) return Val;
1780 if (Ty->isLabelTy())
1781 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block");
1783 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" +
1784 Val->getType()->getDescription() + "'");
1788 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) &&
1789 Ty != Type::getLabelTy(F.getContext())) {
1790 P.Error(Loc, "invalid use of a non-first-class type");
1794 // Otherwise, create a new forward reference for this value and remember it.
1796 if (Ty->isLabelTy())
1797 FwdVal = BasicBlock::Create(F.getContext(), "", &F);
1799 FwdVal = new Argument(Ty);
1801 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc);
1805 /// SetInstName - After an instruction is parsed and inserted into its
1806 /// basic block, this installs its name.
1807 bool LLParser::PerFunctionState::SetInstName(int NameID,
1808 const std::string &NameStr,
1809 LocTy NameLoc, Instruction *Inst) {
1810 // If this instruction has void type, it cannot have a name or ID specified.
1811 if (Inst->getType()->isVoidTy()) {
1812 if (NameID != -1 || !NameStr.empty())
1813 return P.Error(NameLoc, "instructions returning void cannot have a name");
1817 // If this was a numbered instruction, verify that the instruction is the
1818 // expected value and resolve any forward references.
1819 if (NameStr.empty()) {
1820 // If neither a name nor an ID was specified, just use the next ID.
1822 NameID = NumberedVals.size();
1824 if (unsigned(NameID) != NumberedVals.size())
1825 return P.Error(NameLoc, "instruction expected to be numbered '%" +
1826 utostr(NumberedVals.size()) + "'");
1828 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI =
1829 ForwardRefValIDs.find(NameID);
1830 if (FI != ForwardRefValIDs.end()) {
1831 if (FI->second.first->getType() != Inst->getType())
1832 return P.Error(NameLoc, "instruction forward referenced with type '" +
1833 FI->second.first->getType()->getDescription() + "'");
1834 FI->second.first->replaceAllUsesWith(Inst);
1835 delete FI->second.first;
1836 ForwardRefValIDs.erase(FI);
1839 NumberedVals.push_back(Inst);
1843 // Otherwise, the instruction had a name. Resolve forward refs and set it.
1844 std::map<std::string, std::pair<Value*, LocTy> >::iterator
1845 FI = ForwardRefVals.find(NameStr);
1846 if (FI != ForwardRefVals.end()) {
1847 if (FI->second.first->getType() != Inst->getType())
1848 return P.Error(NameLoc, "instruction forward referenced with type '" +
1849 FI->second.first->getType()->getDescription() + "'");
1850 FI->second.first->replaceAllUsesWith(Inst);
1851 delete FI->second.first;
1852 ForwardRefVals.erase(FI);
1855 // Set the name on the instruction.
1856 Inst->setName(NameStr);
1858 if (Inst->getNameStr() != NameStr)
1859 return P.Error(NameLoc, "multiple definition of local value named '" +
1864 /// GetBB - Get a basic block with the specified name or ID, creating a
1865 /// forward reference record if needed.
1866 BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name,
1868 return cast_or_null<BasicBlock>(GetVal(Name,
1869 Type::getLabelTy(F.getContext()), Loc));
1872 BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) {
1873 return cast_or_null<BasicBlock>(GetVal(ID,
1874 Type::getLabelTy(F.getContext()), Loc));
1877 /// DefineBB - Define the specified basic block, which is either named or
1878 /// unnamed. If there is an error, this returns null otherwise it returns
1879 /// the block being defined.
1880 BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name,
1884 BB = GetBB(NumberedVals.size(), Loc);
1886 BB = GetBB(Name, Loc);
1887 if (BB == 0) return 0; // Already diagnosed error.
1889 // Move the block to the end of the function. Forward ref'd blocks are
1890 // inserted wherever they happen to be referenced.
1891 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB);
1893 // Remove the block from forward ref sets.
1895 ForwardRefValIDs.erase(NumberedVals.size());
1896 NumberedVals.push_back(BB);
1898 // BB forward references are already in the function symbol table.
1899 ForwardRefVals.erase(Name);
1905 //===----------------------------------------------------------------------===//
1907 //===----------------------------------------------------------------------===//
1909 /// ParseValID - Parse an abstract value that doesn't necessarily have a
1910 /// type implied. For example, if we parse "4" we don't know what integer type
1911 /// it has. The value will later be combined with its type and checked for
1913 bool LLParser::ParseValID(ValID &ID) {
1914 ID.Loc = Lex.getLoc();
1915 switch (Lex.getKind()) {
1916 default: return TokError("expected value token");
1917 case lltok::GlobalID: // @42
1918 ID.UIntVal = Lex.getUIntVal();
1919 ID.Kind = ValID::t_GlobalID;
1921 case lltok::GlobalVar: // @foo
1922 ID.StrVal = Lex.getStrVal();
1923 ID.Kind = ValID::t_GlobalName;
1925 case lltok::LocalVarID: // %42
1926 ID.UIntVal = Lex.getUIntVal();
1927 ID.Kind = ValID::t_LocalID;
1929 case lltok::LocalVar: // %foo
1930 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0
1931 ID.StrVal = Lex.getStrVal();
1932 ID.Kind = ValID::t_LocalName;
1934 case lltok::Metadata: { // !{...} MDNode, !"foo" MDString
1935 ID.Kind = ValID::t_Metadata;
1937 if (Lex.getKind() == lltok::lbrace) {
1938 SmallVector<Value*, 16> Elts;
1939 if (ParseMDNodeVector(Elts) ||
1940 ParseToken(lltok::rbrace, "expected end of metadata node"))
1943 ID.MetadataVal = MDNode::get(Context, Elts.data(), Elts.size());
1947 // Standalone metadata reference
1948 // !{ ..., !42, ... }
1949 if (!ParseMDNode(ID.MetadataVal))
1953 // ::= '!' STRINGCONSTANT
1954 if (ParseMDString(ID.MetadataVal)) return true;
1955 ID.Kind = ValID::t_Metadata;
1959 ID.APSIntVal = Lex.getAPSIntVal();
1960 ID.Kind = ValID::t_APSInt;
1962 case lltok::APFloat:
1963 ID.APFloatVal = Lex.getAPFloatVal();
1964 ID.Kind = ValID::t_APFloat;
1966 case lltok::kw_true:
1967 ID.ConstantVal = ConstantInt::getTrue(Context);
1968 ID.Kind = ValID::t_Constant;
1970 case lltok::kw_false:
1971 ID.ConstantVal = ConstantInt::getFalse(Context);
1972 ID.Kind = ValID::t_Constant;
1974 case lltok::kw_null: ID.Kind = ValID::t_Null; break;
1975 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break;
1976 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break;
1978 case lltok::lbrace: {
1979 // ValID ::= '{' ConstVector '}'
1981 SmallVector<Constant*, 16> Elts;
1982 if (ParseGlobalValueVector(Elts) ||
1983 ParseToken(lltok::rbrace, "expected end of struct constant"))
1986 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(),
1987 Elts.size(), false);
1988 ID.Kind = ValID::t_Constant;
1992 // ValID ::= '<' ConstVector '>' --> Vector.
1993 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct.
1995 bool isPackedStruct = EatIfPresent(lltok::lbrace);
1997 SmallVector<Constant*, 16> Elts;
1998 LocTy FirstEltLoc = Lex.getLoc();
1999 if (ParseGlobalValueVector(Elts) ||
2001 ParseToken(lltok::rbrace, "expected end of packed struct")) ||
2002 ParseToken(lltok::greater, "expected end of constant"))
2005 if (isPackedStruct) {
2007 ConstantStruct::get(Context, Elts.data(), Elts.size(), true);
2008 ID.Kind = ValID::t_Constant;
2013 return Error(ID.Loc, "constant vector must not be empty");
2015 if (!Elts[0]->getType()->isInteger() &&
2016 !Elts[0]->getType()->isFloatingPoint())
2017 return Error(FirstEltLoc,
2018 "vector elements must have integer or floating point type");
2020 // Verify that all the vector elements have the same type.
2021 for (unsigned i = 1, e = Elts.size(); i != e; ++i)
2022 if (Elts[i]->getType() != Elts[0]->getType())
2023 return Error(FirstEltLoc,
2024 "vector element #" + utostr(i) +
2025 " is not of type '" + Elts[0]->getType()->getDescription());
2027 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size());
2028 ID.Kind = ValID::t_Constant;
2031 case lltok::lsquare: { // Array Constant
2033 SmallVector<Constant*, 16> Elts;
2034 LocTy FirstEltLoc = Lex.getLoc();
2035 if (ParseGlobalValueVector(Elts) ||
2036 ParseToken(lltok::rsquare, "expected end of array constant"))
2039 // Handle empty element.
2041 // Use undef instead of an array because it's inconvenient to determine
2042 // the element type at this point, there being no elements to examine.
2043 ID.Kind = ValID::t_EmptyArray;
2047 if (!Elts[0]->getType()->isFirstClassType())
2048 return Error(FirstEltLoc, "invalid array element type: " +
2049 Elts[0]->getType()->getDescription());
2051 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size());
2053 // Verify all elements are correct type!
2054 for (unsigned i = 0, e = Elts.size(); i != e; ++i) {
2055 if (Elts[i]->getType() != Elts[0]->getType())
2056 return Error(FirstEltLoc,
2057 "array element #" + utostr(i) +
2058 " is not of type '" +Elts[0]->getType()->getDescription());
2061 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size());
2062 ID.Kind = ValID::t_Constant;
2065 case lltok::kw_c: // c "foo"
2067 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false);
2068 if (ParseToken(lltok::StringConstant, "expected string")) return true;
2069 ID.Kind = ValID::t_Constant;
2072 case lltok::kw_asm: {
2073 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT
2074 bool HasSideEffect, AlignStack;
2076 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) ||
2077 ParseOptionalToken(lltok::kw_alignstack, AlignStack) ||
2078 ParseStringConstant(ID.StrVal) ||
2079 ParseToken(lltok::comma, "expected comma in inline asm expression") ||
2080 ParseToken(lltok::StringConstant, "expected constraint string"))
2082 ID.StrVal2 = Lex.getStrVal();
2083 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1);
2084 ID.Kind = ValID::t_InlineAsm;
2088 case lltok::kw_blockaddress: {
2089 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')'
2093 LocTy FnLoc, LabelLoc;
2095 if (ParseToken(lltok::lparen, "expected '(' in block address expression") ||
2097 ParseToken(lltok::comma, "expected comma in block address expression")||
2098 ParseValID(Label) ||
2099 ParseToken(lltok::rparen, "expected ')' in block address expression"))
2102 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName)
2103 return Error(Fn.Loc, "expected function name in blockaddress");
2104 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName)
2105 return Error(Label.Loc, "expected basic block name in blockaddress");
2107 // Make a global variable as a placeholder for this reference.
2108 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context),
2109 false, GlobalValue::InternalLinkage,
2111 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef));
2112 ID.ConstantVal = FwdRef;
2113 ID.Kind = ValID::t_Constant;
2117 case lltok::kw_trunc:
2118 case lltok::kw_zext:
2119 case lltok::kw_sext:
2120 case lltok::kw_fptrunc:
2121 case lltok::kw_fpext:
2122 case lltok::kw_bitcast:
2123 case lltok::kw_uitofp:
2124 case lltok::kw_sitofp:
2125 case lltok::kw_fptoui:
2126 case lltok::kw_fptosi:
2127 case lltok::kw_inttoptr:
2128 case lltok::kw_ptrtoint: {
2129 unsigned Opc = Lex.getUIntVal();
2130 PATypeHolder DestTy(Type::getVoidTy(Context));
2133 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") ||
2134 ParseGlobalTypeAndValue(SrcVal) ||
2135 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") ||
2136 ParseType(DestTy) ||
2137 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast"))
2139 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy))
2140 return Error(ID.Loc, "invalid cast opcode for cast from '" +
2141 SrcVal->getType()->getDescription() + "' to '" +
2142 DestTy->getDescription() + "'");
2143 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc,
2145 ID.Kind = ValID::t_Constant;
2148 case lltok::kw_extractvalue: {
2151 SmallVector<unsigned, 4> Indices;
2152 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")||
2153 ParseGlobalTypeAndValue(Val) ||
2154 ParseIndexList(Indices) ||
2155 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr"))
2157 if (Lex.getKind() == lltok::NamedOrCustomMD)
2158 if (ParseOptionalCustomMetadata()) return true;
2160 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType()))
2161 return Error(ID.Loc, "extractvalue operand must be array or struct");
2162 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(),
2164 return Error(ID.Loc, "invalid indices for extractvalue");
2166 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size());
2167 ID.Kind = ValID::t_Constant;
2170 case lltok::kw_insertvalue: {
2172 Constant *Val0, *Val1;
2173 SmallVector<unsigned, 4> Indices;
2174 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")||
2175 ParseGlobalTypeAndValue(Val0) ||
2176 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")||
2177 ParseGlobalTypeAndValue(Val1) ||
2178 ParseIndexList(Indices) ||
2179 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr"))
2181 if (Lex.getKind() == lltok::NamedOrCustomMD)
2182 if (ParseOptionalCustomMetadata()) return true;
2183 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType()))
2184 return Error(ID.Loc, "extractvalue operand must be array or struct");
2185 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(),
2187 return Error(ID.Loc, "invalid indices for insertvalue");
2188 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1,
2189 Indices.data(), Indices.size());
2190 ID.Kind = ValID::t_Constant;
2193 case lltok::kw_icmp:
2194 case lltok::kw_fcmp: {
2195 unsigned PredVal, Opc = Lex.getUIntVal();
2196 Constant *Val0, *Val1;
2198 if (ParseCmpPredicate(PredVal, Opc) ||
2199 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") ||
2200 ParseGlobalTypeAndValue(Val0) ||
2201 ParseToken(lltok::comma, "expected comma in compare constantexpr") ||
2202 ParseGlobalTypeAndValue(Val1) ||
2203 ParseToken(lltok::rparen, "expected ')' in compare constantexpr"))
2206 if (Val0->getType() != Val1->getType())
2207 return Error(ID.Loc, "compare operands must have the same type");
2209 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal;
2211 if (Opc == Instruction::FCmp) {
2212 if (!Val0->getType()->isFPOrFPVector())
2213 return Error(ID.Loc, "fcmp requires floating point operands");
2214 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1);
2216 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!");
2217 if (!Val0->getType()->isIntOrIntVector() &&
2218 !isa<PointerType>(Val0->getType()))
2219 return Error(ID.Loc, "icmp requires pointer or integer operands");
2220 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1);
2222 ID.Kind = ValID::t_Constant;
2226 // Binary Operators.
2228 case lltok::kw_fadd:
2230 case lltok::kw_fsub:
2232 case lltok::kw_fmul:
2233 case lltok::kw_udiv:
2234 case lltok::kw_sdiv:
2235 case lltok::kw_fdiv:
2236 case lltok::kw_urem:
2237 case lltok::kw_srem:
2238 case lltok::kw_frem: {
2242 unsigned Opc = Lex.getUIntVal();
2243 Constant *Val0, *Val1;
2245 LocTy ModifierLoc = Lex.getLoc();
2246 if (Opc == Instruction::Add ||
2247 Opc == Instruction::Sub ||
2248 Opc == Instruction::Mul) {
2249 if (EatIfPresent(lltok::kw_nuw))
2251 if (EatIfPresent(lltok::kw_nsw)) {
2253 if (EatIfPresent(lltok::kw_nuw))
2256 } else if (Opc == Instruction::SDiv) {
2257 if (EatIfPresent(lltok::kw_exact))
2260 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") ||
2261 ParseGlobalTypeAndValue(Val0) ||
2262 ParseToken(lltok::comma, "expected comma in binary constantexpr") ||
2263 ParseGlobalTypeAndValue(Val1) ||
2264 ParseToken(lltok::rparen, "expected ')' in binary constantexpr"))
2266 if (Val0->getType() != Val1->getType())
2267 return Error(ID.Loc, "operands of constexpr must have same type");
2268 if (!Val0->getType()->isIntOrIntVector()) {
2270 return Error(ModifierLoc, "nuw only applies to integer operations");
2272 return Error(ModifierLoc, "nsw only applies to integer operations");
2274 // API compatibility: Accept either integer or floating-point types with
2275 // add, sub, and mul.
2276 if (!Val0->getType()->isIntOrIntVector() &&
2277 !Val0->getType()->isFPOrFPVector())
2278 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands");
2280 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2281 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap;
2282 if (Exact) Flags |= SDivOperator::IsExact;
2283 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags);
2285 ID.Kind = ValID::t_Constant;
2289 // Logical Operations
2291 case lltok::kw_lshr:
2292 case lltok::kw_ashr:
2295 case lltok::kw_xor: {
2296 unsigned Opc = Lex.getUIntVal();
2297 Constant *Val0, *Val1;
2299 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") ||
2300 ParseGlobalTypeAndValue(Val0) ||
2301 ParseToken(lltok::comma, "expected comma in logical constantexpr") ||
2302 ParseGlobalTypeAndValue(Val1) ||
2303 ParseToken(lltok::rparen, "expected ')' in logical constantexpr"))
2305 if (Val0->getType() != Val1->getType())
2306 return Error(ID.Loc, "operands of constexpr must have same type");
2307 if (!Val0->getType()->isIntOrIntVector())
2308 return Error(ID.Loc,
2309 "constexpr requires integer or integer vector operands");
2310 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1);
2311 ID.Kind = ValID::t_Constant;
2315 case lltok::kw_getelementptr:
2316 case lltok::kw_shufflevector:
2317 case lltok::kw_insertelement:
2318 case lltok::kw_extractelement:
2319 case lltok::kw_select: {
2320 unsigned Opc = Lex.getUIntVal();
2321 SmallVector<Constant*, 16> Elts;
2322 bool InBounds = false;
2324 if (Opc == Instruction::GetElementPtr)
2325 InBounds = EatIfPresent(lltok::kw_inbounds);
2326 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") ||
2327 ParseGlobalValueVector(Elts) ||
2328 ParseToken(lltok::rparen, "expected ')' in constantexpr"))
2331 if (Opc == Instruction::GetElementPtr) {
2332 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType()))
2333 return Error(ID.Loc, "getelementptr requires pointer operand");
2335 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(),
2336 (Value**)(Elts.data() + 1),
2338 return Error(ID.Loc, "invalid indices for getelementptr");
2339 ID.ConstantVal = InBounds ?
2340 ConstantExpr::getInBoundsGetElementPtr(Elts[0],
2343 ConstantExpr::getGetElementPtr(Elts[0],
2344 Elts.data() + 1, Elts.size() - 1);
2345 } else if (Opc == Instruction::Select) {
2346 if (Elts.size() != 3)
2347 return Error(ID.Loc, "expected three operands to select");
2348 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1],
2350 return Error(ID.Loc, Reason);
2351 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]);
2352 } else if (Opc == Instruction::ShuffleVector) {
2353 if (Elts.size() != 3)
2354 return Error(ID.Loc, "expected three operands to shufflevector");
2355 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2]))
2356 return Error(ID.Loc, "invalid operands to shufflevector");
2358 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]);
2359 } else if (Opc == Instruction::ExtractElement) {
2360 if (Elts.size() != 2)
2361 return Error(ID.Loc, "expected two operands to extractelement");
2362 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1]))
2363 return Error(ID.Loc, "invalid extractelement operands");
2364 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]);
2366 assert(Opc == Instruction::InsertElement && "Unknown opcode");
2367 if (Elts.size() != 3)
2368 return Error(ID.Loc, "expected three operands to insertelement");
2369 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2]))
2370 return Error(ID.Loc, "invalid insertelement operands");
2372 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]);
2375 ID.Kind = ValID::t_Constant;
2384 /// ParseGlobalValue - Parse a global value with the specified type.
2385 bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) {
2388 return ParseValID(ID) ||
2389 ConvertGlobalValIDToValue(Ty, ID, V);
2392 /// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved
2394 bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID,
2396 if (isa<FunctionType>(Ty))
2397 return Error(ID.Loc, "functions are not values, refer to them as pointers");
2400 default: llvm_unreachable("Unknown ValID!");
2401 case ValID::t_Metadata:
2402 return Error(ID.Loc, "invalid use of metadata");
2403 case ValID::t_LocalID:
2404 case ValID::t_LocalName:
2405 return Error(ID.Loc, "invalid use of function-local name");
2406 case ValID::t_InlineAsm:
2407 return Error(ID.Loc, "inline asm can only be an operand of call/invoke");
2408 case ValID::t_GlobalName:
2409 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc);
2411 case ValID::t_GlobalID:
2412 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc);
2414 case ValID::t_APSInt:
2415 if (!isa<IntegerType>(Ty))
2416 return Error(ID.Loc, "integer constant must have integer type");
2417 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits());
2418 V = ConstantInt::get(Context, ID.APSIntVal);
2420 case ValID::t_APFloat:
2421 if (!Ty->isFloatingPoint() ||
2422 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal))
2423 return Error(ID.Loc, "floating point constant invalid for type");
2425 // The lexer has no type info, so builds all float and double FP constants
2426 // as double. Fix this here. Long double does not need this.
2427 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble &&
2430 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven,
2433 V = ConstantFP::get(Context, ID.APFloatVal);
2435 if (V->getType() != Ty)
2436 return Error(ID.Loc, "floating point constant does not have type '" +
2437 Ty->getDescription() + "'");
2441 if (!isa<PointerType>(Ty))
2442 return Error(ID.Loc, "null must be a pointer type");
2443 V = ConstantPointerNull::get(cast<PointerType>(Ty));
2445 case ValID::t_Undef:
2446 // FIXME: LabelTy should not be a first-class type.
2447 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) &&
2448 !isa<OpaqueType>(Ty))
2449 return Error(ID.Loc, "invalid type for undef constant");
2450 V = UndefValue::get(Ty);
2452 case ValID::t_EmptyArray:
2453 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0)
2454 return Error(ID.Loc, "invalid empty array initializer");
2455 V = UndefValue::get(Ty);
2458 // FIXME: LabelTy should not be a first-class type.
2459 if (!Ty->isFirstClassType() || Ty->isLabelTy())
2460 return Error(ID.Loc, "invalid type for null constant");
2461 V = Constant::getNullValue(Ty);
2463 case ValID::t_Constant:
2464 if (ID.ConstantVal->getType() != Ty)
2465 return Error(ID.Loc, "constant expression type mismatch");
2471 bool LLParser::ParseGlobalTypeAndValue(Constant *&V) {
2472 PATypeHolder Type(Type::getVoidTy(Context));
2473 return ParseType(Type) ||
2474 ParseGlobalValue(Type, V);
2477 /// ParseGlobalValueVector
2479 /// ::= TypeAndValue (',' TypeAndValue)*
2480 bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) {
2482 if (Lex.getKind() == lltok::rbrace ||
2483 Lex.getKind() == lltok::rsquare ||
2484 Lex.getKind() == lltok::greater ||
2485 Lex.getKind() == lltok::rparen)
2489 if (ParseGlobalTypeAndValue(C)) return true;
2492 while (EatIfPresent(lltok::comma)) {
2493 if (ParseGlobalTypeAndValue(C)) return true;
2501 //===----------------------------------------------------------------------===//
2502 // Function Parsing.
2503 //===----------------------------------------------------------------------===//
2505 bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V,
2506 PerFunctionState &PFS) {
2507 if (ID.Kind == ValID::t_LocalID)
2508 V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc);
2509 else if (ID.Kind == ValID::t_LocalName)
2510 V = PFS.GetVal(ID.StrVal, Ty, ID.Loc);
2511 else if (ID.Kind == ValID::t_InlineAsm) {
2512 const PointerType *PTy = dyn_cast<PointerType>(Ty);
2513 const FunctionType *FTy =
2514 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0;
2515 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2))
2516 return Error(ID.Loc, "invalid type for inline asm constraint string");
2517 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1);
2519 } else if (ID.Kind == ValID::t_Metadata) {
2523 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true;
2531 bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) {
2534 return ParseValID(ID) ||
2535 ConvertValIDToValue(Ty, ID, V, PFS);
2538 bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) {
2539 PATypeHolder T(Type::getVoidTy(Context));
2540 return ParseType(T) ||
2541 ParseValue(T, V, PFS);
2544 bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc,
2545 PerFunctionState &PFS) {
2548 if (ParseTypeAndValue(V, PFS)) return true;
2549 if (!isa<BasicBlock>(V))
2550 return Error(Loc, "expected a basic block");
2551 BB = cast<BasicBlock>(V);
2557 /// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs
2558 /// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection
2559 /// OptionalAlign OptGC
2560 bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) {
2561 // Parse the linkage.
2562 LocTy LinkageLoc = Lex.getLoc();
2565 unsigned Visibility, RetAttrs;
2567 PATypeHolder RetType(Type::getVoidTy(Context));
2568 LocTy RetTypeLoc = Lex.getLoc();
2569 if (ParseOptionalLinkage(Linkage) ||
2570 ParseOptionalVisibility(Visibility) ||
2571 ParseOptionalCallingConv(CC) ||
2572 ParseOptionalAttrs(RetAttrs, 1) ||
2573 ParseType(RetType, RetTypeLoc, true /*void allowed*/))
2576 // Verify that the linkage is ok.
2577 switch ((GlobalValue::LinkageTypes)Linkage) {
2578 case GlobalValue::ExternalLinkage:
2579 break; // always ok.
2580 case GlobalValue::DLLImportLinkage:
2581 case GlobalValue::ExternalWeakLinkage:
2583 return Error(LinkageLoc, "invalid linkage for function definition");
2585 case GlobalValue::PrivateLinkage:
2586 case GlobalValue::LinkerPrivateLinkage:
2587 case GlobalValue::InternalLinkage:
2588 case GlobalValue::AvailableExternallyLinkage:
2589 case GlobalValue::LinkOnceAnyLinkage:
2590 case GlobalValue::LinkOnceODRLinkage:
2591 case GlobalValue::WeakAnyLinkage:
2592 case GlobalValue::WeakODRLinkage:
2593 case GlobalValue::DLLExportLinkage:
2595 return Error(LinkageLoc, "invalid linkage for function declaration");
2597 case GlobalValue::AppendingLinkage:
2598 case GlobalValue::GhostLinkage:
2599 case GlobalValue::CommonLinkage:
2600 return Error(LinkageLoc, "invalid function linkage type");
2603 if (!FunctionType::isValidReturnType(RetType) ||
2604 isa<OpaqueType>(RetType))
2605 return Error(RetTypeLoc, "invalid function return type");
2607 LocTy NameLoc = Lex.getLoc();
2609 std::string FunctionName;
2610 if (Lex.getKind() == lltok::GlobalVar) {
2611 FunctionName = Lex.getStrVal();
2612 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok.
2613 unsigned NameID = Lex.getUIntVal();
2615 if (NameID != NumberedVals.size())
2616 return TokError("function expected to be numbered '%" +
2617 utostr(NumberedVals.size()) + "'");
2619 return TokError("expected function name");
2624 if (Lex.getKind() != lltok::lparen)
2625 return TokError("expected '(' in function argument list");
2627 std::vector<ArgInfo> ArgList;
2630 std::string Section;
2634 if (ParseArgumentList(ArgList, isVarArg, false) ||
2635 ParseOptionalAttrs(FuncAttrs, 2) ||
2636 (EatIfPresent(lltok::kw_section) &&
2637 ParseStringConstant(Section)) ||
2638 ParseOptionalAlignment(Alignment) ||
2639 (EatIfPresent(lltok::kw_gc) &&
2640 ParseStringConstant(GC)))
2643 // If the alignment was parsed as an attribute, move to the alignment field.
2644 if (FuncAttrs & Attribute::Alignment) {
2645 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs);
2646 FuncAttrs &= ~Attribute::Alignment;
2649 // Okay, if we got here, the function is syntactically valid. Convert types
2650 // and do semantic checks.
2651 std::vector<const Type*> ParamTypeList;
2652 SmallVector<AttributeWithIndex, 8> Attrs;
2653 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function
2655 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg;
2656 if (FuncAttrs & ObsoleteFuncAttrs) {
2657 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs;
2658 FuncAttrs &= ~ObsoleteFuncAttrs;
2661 if (RetAttrs != Attribute::None)
2662 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs));
2664 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
2665 ParamTypeList.push_back(ArgList[i].Type);
2666 if (ArgList[i].Attrs != Attribute::None)
2667 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs));
2670 if (FuncAttrs != Attribute::None)
2671 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs));
2673 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end());
2675 if (PAL.paramHasAttr(1, Attribute::StructRet) &&
2676 RetType != Type::getVoidTy(Context))
2677 return Error(RetTypeLoc, "functions with 'sret' argument must return void");
2679 const FunctionType *FT =
2680 FunctionType::get(RetType, ParamTypeList, isVarArg);
2681 const PointerType *PFT = PointerType::getUnqual(FT);
2684 if (!FunctionName.empty()) {
2685 // If this was a definition of a forward reference, remove the definition
2686 // from the forward reference table and fill in the forward ref.
2687 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI =
2688 ForwardRefVals.find(FunctionName);
2689 if (FRVI != ForwardRefVals.end()) {
2690 Fn = M->getFunction(FunctionName);
2691 ForwardRefVals.erase(FRVI);
2692 } else if ((Fn = M->getFunction(FunctionName))) {
2693 // If this function already exists in the symbol table, then it is
2694 // multiply defined. We accept a few cases for old backwards compat.
2695 // FIXME: Remove this stuff for LLVM 3.0.
2696 if (Fn->getType() != PFT || Fn->getAttributes() != PAL ||
2697 (!Fn->isDeclaration() && isDefine)) {
2698 // If the redefinition has different type or different attributes,
2699 // reject it. If both have bodies, reject it.
2700 return Error(NameLoc, "invalid redefinition of function '" +
2701 FunctionName + "'");
2702 } else if (Fn->isDeclaration()) {
2703 // Make sure to strip off any argument names so we can't get conflicts.
2704 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end();
2708 } else if (M->getNamedValue(FunctionName)) {
2709 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'");
2713 // If this is a definition of a forward referenced function, make sure the
2715 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I
2716 = ForwardRefValIDs.find(NumberedVals.size());
2717 if (I != ForwardRefValIDs.end()) {
2718 Fn = cast<Function>(I->second.first);
2719 if (Fn->getType() != PFT)
2720 return Error(NameLoc, "type of definition and forward reference of '@" +
2721 utostr(NumberedVals.size()) +"' disagree");
2722 ForwardRefValIDs.erase(I);
2727 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M);
2728 else // Move the forward-reference to the correct spot in the module.
2729 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn);
2731 if (FunctionName.empty())
2732 NumberedVals.push_back(Fn);
2734 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage);
2735 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility);
2736 Fn->setCallingConv(CC);
2737 Fn->setAttributes(PAL);
2738 Fn->setAlignment(Alignment);
2739 Fn->setSection(Section);
2740 if (!GC.empty()) Fn->setGC(GC.c_str());
2742 // Add all of the arguments we parsed to the function.
2743 Function::arg_iterator ArgIt = Fn->arg_begin();
2744 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) {
2745 // If we run out of arguments in the Function prototype, exit early.
2746 // FIXME: REMOVE THIS IN LLVM 3.0, this is just for the mismatch case above.
2747 if (ArgIt == Fn->arg_end()) break;
2749 // If the argument has a name, insert it into the argument symbol table.
2750 if (ArgList[i].Name.empty()) continue;
2752 // Set the name, if it conflicted, it will be auto-renamed.
2753 ArgIt->setName(ArgList[i].Name);
2755 if (ArgIt->getNameStr() != ArgList[i].Name)
2756 return Error(ArgList[i].Loc, "redefinition of argument '%" +
2757 ArgList[i].Name + "'");
2764 /// ParseFunctionBody
2765 /// ::= '{' BasicBlock+ '}'
2766 /// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0
2768 bool LLParser::ParseFunctionBody(Function &Fn) {
2769 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin)
2770 return TokError("expected '{' in function body");
2771 Lex.Lex(); // eat the {.
2773 int FunctionNumber = -1;
2774 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1;
2776 PerFunctionState PFS(*this, Fn, FunctionNumber);
2778 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end)
2779 if (ParseBasicBlock(PFS)) return true;
2784 // Verify function is ok.
2785 return PFS.FinishFunction();
2789 /// ::= LabelStr? Instruction*
2790 bool LLParser::ParseBasicBlock(PerFunctionState &PFS) {
2791 // If this basic block starts out with a name, remember it.
2793 LocTy NameLoc = Lex.getLoc();
2794 if (Lex.getKind() == lltok::LabelStr) {
2795 Name = Lex.getStrVal();
2799 BasicBlock *BB = PFS.DefineBB(Name, NameLoc);
2800 if (BB == 0) return true;
2802 std::string NameStr;
2804 // Parse the instructions in this block until we get a terminator.
2807 // This instruction may have three possibilities for a name: a) none
2808 // specified, b) name specified "%foo =", c) number specified: "%4 =".
2809 LocTy NameLoc = Lex.getLoc();
2813 if (Lex.getKind() == lltok::LocalVarID) {
2814 NameID = Lex.getUIntVal();
2816 if (ParseToken(lltok::equal, "expected '=' after instruction id"))
2818 } else if (Lex.getKind() == lltok::LocalVar ||
2819 // FIXME: REMOVE IN LLVM 3.0
2820 Lex.getKind() == lltok::StringConstant) {
2821 NameStr = Lex.getStrVal();
2823 if (ParseToken(lltok::equal, "expected '=' after instruction name"))
2827 if (ParseInstruction(Inst, BB, PFS)) return true;
2828 if (EatIfPresent(lltok::comma))
2829 ParseOptionalCustomMetadata();
2831 // Set metadata attached with this instruction.
2832 MetadataContext &TheMetadata = M->getContext().getMetadata();
2833 for (SmallVector<std::pair<unsigned, MDNode *>, 2>::iterator
2834 MDI = MDsOnInst.begin(), MDE = MDsOnInst.end(); MDI != MDE; ++MDI)
2835 TheMetadata.addMD(MDI->first, MDI->second, Inst);
2838 BB->getInstList().push_back(Inst);
2840 // Set the name on the instruction.
2841 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true;
2842 } while (!isa<TerminatorInst>(Inst));
2847 //===----------------------------------------------------------------------===//
2848 // Instruction Parsing.
2849 //===----------------------------------------------------------------------===//
2851 /// ParseInstruction - Parse one of the many different instructions.
2853 bool LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB,
2854 PerFunctionState &PFS) {
2855 lltok::Kind Token = Lex.getKind();
2856 if (Token == lltok::Eof)
2857 return TokError("found end of file when expecting more instructions");
2858 LocTy Loc = Lex.getLoc();
2859 unsigned KeywordVal = Lex.getUIntVal();
2860 Lex.Lex(); // Eat the keyword.
2863 default: return Error(Loc, "expected instruction opcode");
2864 // Terminator Instructions.
2865 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false;
2866 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false;
2867 case lltok::kw_ret: return ParseRet(Inst, BB, PFS);
2868 case lltok::kw_br: return ParseBr(Inst, PFS);
2869 case lltok::kw_switch: return ParseSwitch(Inst, PFS);
2870 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS);
2871 case lltok::kw_invoke: return ParseInvoke(Inst, PFS);
2872 // Binary Operators.
2875 case lltok::kw_mul: {
2878 LocTy ModifierLoc = Lex.getLoc();
2879 if (EatIfPresent(lltok::kw_nuw))
2881 if (EatIfPresent(lltok::kw_nsw)) {
2883 if (EatIfPresent(lltok::kw_nuw))
2886 // API compatibility: Accept either integer or floating-point types.
2887 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0);
2889 if (!Inst->getType()->isIntOrIntVector()) {
2891 return Error(ModifierLoc, "nuw only applies to integer operations");
2893 return Error(ModifierLoc, "nsw only applies to integer operations");
2896 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true);
2898 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true);
2902 case lltok::kw_fadd:
2903 case lltok::kw_fsub:
2904 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2);
2906 case lltok::kw_sdiv: {
2908 if (EatIfPresent(lltok::kw_exact))
2910 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1);
2913 cast<BinaryOperator>(Inst)->setIsExact(true);
2917 case lltok::kw_udiv:
2918 case lltok::kw_urem:
2919 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1);
2920 case lltok::kw_fdiv:
2921 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2);
2923 case lltok::kw_lshr:
2924 case lltok::kw_ashr:
2927 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal);
2928 case lltok::kw_icmp:
2929 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal);
2931 case lltok::kw_trunc:
2932 case lltok::kw_zext:
2933 case lltok::kw_sext:
2934 case lltok::kw_fptrunc:
2935 case lltok::kw_fpext:
2936 case lltok::kw_bitcast:
2937 case lltok::kw_uitofp:
2938 case lltok::kw_sitofp:
2939 case lltok::kw_fptoui:
2940 case lltok::kw_fptosi:
2941 case lltok::kw_inttoptr:
2942 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal);
2944 case lltok::kw_select: return ParseSelect(Inst, PFS);
2945 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS);
2946 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS);
2947 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS);
2948 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS);
2949 case lltok::kw_phi: return ParsePHI(Inst, PFS);
2950 case lltok::kw_call: return ParseCall(Inst, PFS, false);
2951 case lltok::kw_tail: return ParseCall(Inst, PFS, true);
2953 case lltok::kw_alloca: return ParseAlloc(Inst, PFS);
2954 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false);
2955 case lltok::kw_free: return ParseFree(Inst, PFS, BB);
2956 case lltok::kw_load: return ParseLoad(Inst, PFS, false);
2957 case lltok::kw_store: return ParseStore(Inst, PFS, false);
2958 case lltok::kw_volatile:
2959 if (EatIfPresent(lltok::kw_load))
2960 return ParseLoad(Inst, PFS, true);
2961 else if (EatIfPresent(lltok::kw_store))
2962 return ParseStore(Inst, PFS, true);
2964 return TokError("expected 'load' or 'store'");
2965 case lltok::kw_getresult: return ParseGetResult(Inst, PFS);
2966 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS);
2967 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS);
2968 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS);
2972 /// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind.
2973 bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) {
2974 if (Opc == Instruction::FCmp) {
2975 switch (Lex.getKind()) {
2976 default: TokError("expected fcmp predicate (e.g. 'oeq')");
2977 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break;
2978 case lltok::kw_one: P = CmpInst::FCMP_ONE; break;
2979 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break;
2980 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break;
2981 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break;
2982 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break;
2983 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break;
2984 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break;
2985 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break;
2986 case lltok::kw_une: P = CmpInst::FCMP_UNE; break;
2987 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break;
2988 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break;
2989 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break;
2990 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break;
2991 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break;
2992 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break;
2995 switch (Lex.getKind()) {
2996 default: TokError("expected icmp predicate (e.g. 'eq')");
2997 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break;
2998 case lltok::kw_ne: P = CmpInst::ICMP_NE; break;
2999 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break;
3000 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break;
3001 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break;
3002 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break;
3003 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break;
3004 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break;
3005 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break;
3006 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break;
3013 //===----------------------------------------------------------------------===//
3014 // Terminator Instructions.
3015 //===----------------------------------------------------------------------===//
3017 /// ParseRet - Parse a return instruction.
3018 /// ::= 'ret' void (',' !dbg, !1)
3019 /// ::= 'ret' TypeAndValue (',' !dbg, !1)
3020 /// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1)
3021 /// [[obsolete: LLVM 3.0]]
3022 bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB,
3023 PerFunctionState &PFS) {
3024 PATypeHolder Ty(Type::getVoidTy(Context));
3025 if (ParseType(Ty, true /*void allowed*/)) return true;
3027 if (Ty->isVoidTy()) {
3028 Inst = ReturnInst::Create(Context);
3033 if (ParseValue(Ty, RV, PFS)) return true;
3035 if (EatIfPresent(lltok::comma)) {
3036 // Parse optional custom metadata, e.g. !dbg
3037 if (Lex.getKind() == lltok::NamedOrCustomMD) {
3038 if (ParseOptionalCustomMetadata()) return true;
3040 // The normal case is one return value.
3041 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring use
3042 // of 'ret {i32,i32} {i32 1, i32 2}'
3043 SmallVector<Value*, 8> RVs;
3047 // If optional custom metadata, e.g. !dbg is seen then this is the
3049 if (Lex.getKind() == lltok::NamedOrCustomMD)
3051 if (ParseTypeAndValue(RV, PFS)) return true;
3053 } while (EatIfPresent(lltok::comma));
3055 RV = UndefValue::get(PFS.getFunction().getReturnType());
3056 for (unsigned i = 0, e = RVs.size(); i != e; ++i) {
3057 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv");
3058 BB->getInstList().push_back(I);
3064 Inst = ReturnInst::Create(Context, RV);
3070 /// ::= 'br' TypeAndValue
3071 /// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue
3072 bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) {
3075 BasicBlock *Op1, *Op2;
3076 if (ParseTypeAndValue(Op0, Loc, PFS)) return true;
3078 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) {
3079 Inst = BranchInst::Create(BB);
3083 if (Op0->getType() != Type::getInt1Ty(Context))
3084 return Error(Loc, "branch condition must have 'i1' type");
3086 if (ParseToken(lltok::comma, "expected ',' after branch condition") ||
3087 ParseTypeAndBasicBlock(Op1, Loc, PFS) ||
3088 ParseToken(lltok::comma, "expected ',' after true destination") ||
3089 ParseTypeAndBasicBlock(Op2, Loc2, PFS))
3092 Inst = BranchInst::Create(Op1, Op2, Op0);
3098 /// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']'
3100 /// ::= (TypeAndValue ',' TypeAndValue)*
3101 bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) {
3102 LocTy CondLoc, BBLoc;
3104 BasicBlock *DefaultBB;
3105 if (ParseTypeAndValue(Cond, CondLoc, PFS) ||
3106 ParseToken(lltok::comma, "expected ',' after switch condition") ||
3107 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) ||
3108 ParseToken(lltok::lsquare, "expected '[' with switch table"))
3111 if (!isa<IntegerType>(Cond->getType()))
3112 return Error(CondLoc, "switch condition must have integer type");
3114 // Parse the jump table pairs.
3115 SmallPtrSet<Value*, 32> SeenCases;
3116 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table;
3117 while (Lex.getKind() != lltok::rsquare) {
3121 if (ParseTypeAndValue(Constant, CondLoc, PFS) ||
3122 ParseToken(lltok::comma, "expected ',' after case value") ||
3123 ParseTypeAndBasicBlock(DestBB, PFS))
3126 if (!SeenCases.insert(Constant))
3127 return Error(CondLoc, "duplicate case value in switch");
3128 if (!isa<ConstantInt>(Constant))
3129 return Error(CondLoc, "case value is not a constant integer");
3131 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB));
3134 Lex.Lex(); // Eat the ']'.
3136 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size());
3137 for (unsigned i = 0, e = Table.size(); i != e; ++i)
3138 SI->addCase(Table[i].first, Table[i].second);
3145 /// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']'
3146 bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) {
3149 if (ParseTypeAndValue(Address, AddrLoc, PFS) ||
3150 ParseToken(lltok::comma, "expected ',' after indirectbr address") ||
3151 ParseToken(lltok::lsquare, "expected '[' with indirectbr"))
3154 if (!isa<PointerType>(Address->getType()))
3155 return Error(AddrLoc, "indirectbr address must have pointer type");
3157 // Parse the destination list.
3158 SmallVector<BasicBlock*, 16> DestList;
3160 if (Lex.getKind() != lltok::rsquare) {
3162 if (ParseTypeAndBasicBlock(DestBB, PFS))
3164 DestList.push_back(DestBB);
3166 while (EatIfPresent(lltok::comma)) {
3167 if (ParseTypeAndBasicBlock(DestBB, PFS))
3169 DestList.push_back(DestBB);
3173 if (ParseToken(lltok::rsquare, "expected ']' at end of block list"))
3176 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size());
3177 for (unsigned i = 0, e = DestList.size(); i != e; ++i)
3178 IBI->addDestination(DestList[i]);
3185 /// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList
3186 /// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue
3187 bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) {
3188 LocTy CallLoc = Lex.getLoc();
3189 unsigned RetAttrs, FnAttrs;
3191 PATypeHolder RetType(Type::getVoidTy(Context));
3194 SmallVector<ParamInfo, 16> ArgList;
3196 BasicBlock *NormalBB, *UnwindBB;
3197 if (ParseOptionalCallingConv(CC) ||
3198 ParseOptionalAttrs(RetAttrs, 1) ||
3199 ParseType(RetType, RetTypeLoc, true /*void allowed*/) ||
3200 ParseValID(CalleeID) ||
3201 ParseParameterList(ArgList, PFS) ||
3202 ParseOptionalAttrs(FnAttrs, 2) ||
3203 ParseToken(lltok::kw_to, "expected 'to' in invoke") ||
3204 ParseTypeAndBasicBlock(NormalBB, PFS) ||
3205 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") ||
3206 ParseTypeAndBasicBlock(UnwindBB, PFS))
3209 // If RetType is a non-function pointer type, then this is the short syntax
3210 // for the call, which means that RetType is just the return type. Infer the
3211 // rest of the function argument types from the arguments that are present.
3212 const PointerType *PFTy = 0;
3213 const FunctionType *Ty = 0;
3214 if (!(PFTy = dyn_cast<PointerType>(RetType)) ||
3215 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
3216 // Pull out the types of all of the arguments...
3217 std::vector<const Type*> ParamTypes;
3218 for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
3219 ParamTypes.push_back(ArgList[i].V->getType());
3221 if (!FunctionType::isValidReturnType(RetType))
3222 return Error(RetTypeLoc, "Invalid result type for LLVM function");
3224 Ty = FunctionType::get(RetType, ParamTypes, false);
3225 PFTy = PointerType::getUnqual(Ty);
3228 // Look up the callee.
3230 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true;
3232 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional
3233 // function attributes.
3234 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg;
3235 if (FnAttrs & ObsoleteFuncAttrs) {
3236 RetAttrs |= FnAttrs & ObsoleteFuncAttrs;
3237 FnAttrs &= ~ObsoleteFuncAttrs;
3240 // Set up the Attributes for the function.
3241 SmallVector<AttributeWithIndex, 8> Attrs;
3242 if (RetAttrs != Attribute::None)
3243 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs));
3245 SmallVector<Value*, 8> Args;
3247 // Loop through FunctionType's arguments and ensure they are specified
3248 // correctly. Also, gather any parameter attributes.
3249 FunctionType::param_iterator I = Ty->param_begin();
3250 FunctionType::param_iterator E = Ty->param_end();
3251 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
3252 const Type *ExpectedTy = 0;
3255 } else if (!Ty->isVarArg()) {
3256 return Error(ArgList[i].Loc, "too many arguments specified");
3259 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType())
3260 return Error(ArgList[i].Loc, "argument is not of expected type '" +
3261 ExpectedTy->getDescription() + "'");
3262 Args.push_back(ArgList[i].V);
3263 if (ArgList[i].Attrs != Attribute::None)
3264 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs));
3268 return Error(CallLoc, "not enough parameters specified for call");
3270 if (FnAttrs != Attribute::None)
3271 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs));
3273 // Finish off the Attributes and check them
3274 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end());
3276 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB,
3277 Args.begin(), Args.end());
3278 II->setCallingConv(CC);
3279 II->setAttributes(PAL);
3286 //===----------------------------------------------------------------------===//
3287 // Binary Operators.
3288 //===----------------------------------------------------------------------===//
3291 /// ::= ArithmeticOps TypeAndValue ',' Value
3293 /// If OperandType is 0, then any FP or integer operand is allowed. If it is 1,
3294 /// then any integer operand is allowed, if it is 2, any fp operand is allowed.
3295 bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS,
3296 unsigned Opc, unsigned OperandType) {
3297 LocTy Loc; Value *LHS, *RHS;
3298 if (ParseTypeAndValue(LHS, Loc, PFS) ||
3299 ParseToken(lltok::comma, "expected ',' in arithmetic operation") ||
3300 ParseValue(LHS->getType(), RHS, PFS))
3304 switch (OperandType) {
3305 default: llvm_unreachable("Unknown operand type!");
3306 case 0: // int or FP.
3307 Valid = LHS->getType()->isIntOrIntVector() ||
3308 LHS->getType()->isFPOrFPVector();
3310 case 1: Valid = LHS->getType()->isIntOrIntVector(); break;
3311 case 2: Valid = LHS->getType()->isFPOrFPVector(); break;
3315 return Error(Loc, "invalid operand type for instruction");
3317 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3322 /// ::= ArithmeticOps TypeAndValue ',' Value {
3323 bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS,
3325 LocTy Loc; Value *LHS, *RHS;
3326 if (ParseTypeAndValue(LHS, Loc, PFS) ||
3327 ParseToken(lltok::comma, "expected ',' in logical operation") ||
3328 ParseValue(LHS->getType(), RHS, PFS))
3331 if (!LHS->getType()->isIntOrIntVector())
3332 return Error(Loc,"instruction requires integer or integer vector operands");
3334 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3340 /// ::= 'icmp' IPredicates TypeAndValue ',' Value
3341 /// ::= 'fcmp' FPredicates TypeAndValue ',' Value
3342 bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS,
3344 // Parse the integer/fp comparison predicate.
3348 if (ParseCmpPredicate(Pred, Opc) ||
3349 ParseTypeAndValue(LHS, Loc, PFS) ||
3350 ParseToken(lltok::comma, "expected ',' after compare value") ||
3351 ParseValue(LHS->getType(), RHS, PFS))
3354 if (Opc == Instruction::FCmp) {
3355 if (!LHS->getType()->isFPOrFPVector())
3356 return Error(Loc, "fcmp requires floating point operands");
3357 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS);
3359 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!");
3360 if (!LHS->getType()->isIntOrIntVector() &&
3361 !isa<PointerType>(LHS->getType()))
3362 return Error(Loc, "icmp requires integer operands");
3363 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS);
3368 //===----------------------------------------------------------------------===//
3369 // Other Instructions.
3370 //===----------------------------------------------------------------------===//
3374 /// ::= CastOpc TypeAndValue 'to' Type
3375 bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS,
3377 LocTy Loc; Value *Op;
3378 PATypeHolder DestTy(Type::getVoidTy(Context));
3379 if (ParseTypeAndValue(Op, Loc, PFS) ||
3380 ParseToken(lltok::kw_to, "expected 'to' after cast value") ||
3384 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) {
3385 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy);
3386 return Error(Loc, "invalid cast opcode for cast from '" +
3387 Op->getType()->getDescription() + "' to '" +
3388 DestTy->getDescription() + "'");
3390 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy);
3395 /// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue
3396 bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) {
3398 Value *Op0, *Op1, *Op2;
3399 if (ParseTypeAndValue(Op0, Loc, PFS) ||
3400 ParseToken(lltok::comma, "expected ',' after select condition") ||
3401 ParseTypeAndValue(Op1, PFS) ||
3402 ParseToken(lltok::comma, "expected ',' after select value") ||
3403 ParseTypeAndValue(Op2, PFS))
3406 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2))
3407 return Error(Loc, Reason);
3409 Inst = SelectInst::Create(Op0, Op1, Op2);
3414 /// ::= 'va_arg' TypeAndValue ',' Type
3415 bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) {
3417 PATypeHolder EltTy(Type::getVoidTy(Context));
3419 if (ParseTypeAndValue(Op, PFS) ||
3420 ParseToken(lltok::comma, "expected ',' after vaarg operand") ||
3421 ParseType(EltTy, TypeLoc))
3424 if (!EltTy->isFirstClassType())
3425 return Error(TypeLoc, "va_arg requires operand with first class type");
3427 Inst = new VAArgInst(Op, EltTy);
3431 /// ParseExtractElement
3432 /// ::= 'extractelement' TypeAndValue ',' TypeAndValue
3433 bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) {
3436 if (ParseTypeAndValue(Op0, Loc, PFS) ||
3437 ParseToken(lltok::comma, "expected ',' after extract value") ||
3438 ParseTypeAndValue(Op1, PFS))
3441 if (!ExtractElementInst::isValidOperands(Op0, Op1))
3442 return Error(Loc, "invalid extractelement operands");
3444 Inst = ExtractElementInst::Create(Op0, Op1);
3448 /// ParseInsertElement
3449 /// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue
3450 bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) {
3452 Value *Op0, *Op1, *Op2;
3453 if (ParseTypeAndValue(Op0, Loc, PFS) ||
3454 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
3455 ParseTypeAndValue(Op1, PFS) ||
3456 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
3457 ParseTypeAndValue(Op2, PFS))
3460 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2))
3461 return Error(Loc, "invalid insertelement operands");
3463 Inst = InsertElementInst::Create(Op0, Op1, Op2);
3467 /// ParseShuffleVector
3468 /// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue
3469 bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) {
3471 Value *Op0, *Op1, *Op2;
3472 if (ParseTypeAndValue(Op0, Loc, PFS) ||
3473 ParseToken(lltok::comma, "expected ',' after shuffle mask") ||
3474 ParseTypeAndValue(Op1, PFS) ||
3475 ParseToken(lltok::comma, "expected ',' after shuffle value") ||
3476 ParseTypeAndValue(Op2, PFS))
3479 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2))
3480 return Error(Loc, "invalid extractelement operands");
3482 Inst = new ShuffleVectorInst(Op0, Op1, Op2);
3487 /// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')*
3488 bool LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) {
3489 PATypeHolder Ty(Type::getVoidTy(Context));
3491 LocTy TypeLoc = Lex.getLoc();
3493 if (ParseType(Ty) ||
3494 ParseToken(lltok::lsquare, "expected '[' in phi value list") ||
3495 ParseValue(Ty, Op0, PFS) ||
3496 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
3497 ParseValue(Type::getLabelTy(Context), Op1, PFS) ||
3498 ParseToken(lltok::rsquare, "expected ']' in phi value list"))
3501 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals;
3503 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1)));
3505 if (!EatIfPresent(lltok::comma))
3508 if (Lex.getKind() == lltok::NamedOrCustomMD)
3511 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") ||
3512 ParseValue(Ty, Op0, PFS) ||
3513 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
3514 ParseValue(Type::getLabelTy(Context), Op1, PFS) ||
3515 ParseToken(lltok::rsquare, "expected ']' in phi value list"))
3519 if (Lex.getKind() == lltok::NamedOrCustomMD)
3520 if (ParseOptionalCustomMetadata()) return true;
3522 if (!Ty->isFirstClassType())
3523 return Error(TypeLoc, "phi node must have first class type");
3525 PHINode *PN = PHINode::Create(Ty);
3526 PN->reserveOperandSpace(PHIVals.size());
3527 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i)
3528 PN->addIncoming(PHIVals[i].first, PHIVals[i].second);
3534 /// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value
3535 /// ParameterList OptionalAttrs
3536 bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS,
3538 unsigned RetAttrs, FnAttrs;
3540 PATypeHolder RetType(Type::getVoidTy(Context));
3543 SmallVector<ParamInfo, 16> ArgList;
3544 LocTy CallLoc = Lex.getLoc();
3546 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) ||
3547 ParseOptionalCallingConv(CC) ||
3548 ParseOptionalAttrs(RetAttrs, 1) ||
3549 ParseType(RetType, RetTypeLoc, true /*void allowed*/) ||
3550 ParseValID(CalleeID) ||
3551 ParseParameterList(ArgList, PFS) ||
3552 ParseOptionalAttrs(FnAttrs, 2))
3555 // If RetType is a non-function pointer type, then this is the short syntax
3556 // for the call, which means that RetType is just the return type. Infer the
3557 // rest of the function argument types from the arguments that are present.
3558 const PointerType *PFTy = 0;
3559 const FunctionType *Ty = 0;
3560 if (!(PFTy = dyn_cast<PointerType>(RetType)) ||
3561 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
3562 // Pull out the types of all of the arguments...
3563 std::vector<const Type*> ParamTypes;
3564 for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
3565 ParamTypes.push_back(ArgList[i].V->getType());
3567 if (!FunctionType::isValidReturnType(RetType))
3568 return Error(RetTypeLoc, "Invalid result type for LLVM function");
3570 Ty = FunctionType::get(RetType, ParamTypes, false);
3571 PFTy = PointerType::getUnqual(Ty);
3574 // Look up the callee.
3576 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true;
3578 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional
3579 // function attributes.
3580 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg;
3581 if (FnAttrs & ObsoleteFuncAttrs) {
3582 RetAttrs |= FnAttrs & ObsoleteFuncAttrs;
3583 FnAttrs &= ~ObsoleteFuncAttrs;
3586 // Set up the Attributes for the function.
3587 SmallVector<AttributeWithIndex, 8> Attrs;
3588 if (RetAttrs != Attribute::None)
3589 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs));
3591 SmallVector<Value*, 8> Args;
3593 // Loop through FunctionType's arguments and ensure they are specified
3594 // correctly. Also, gather any parameter attributes.
3595 FunctionType::param_iterator I = Ty->param_begin();
3596 FunctionType::param_iterator E = Ty->param_end();
3597 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
3598 const Type *ExpectedTy = 0;
3601 } else if (!Ty->isVarArg()) {
3602 return Error(ArgList[i].Loc, "too many arguments specified");
3605 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType())
3606 return Error(ArgList[i].Loc, "argument is not of expected type '" +
3607 ExpectedTy->getDescription() + "'");
3608 Args.push_back(ArgList[i].V);
3609 if (ArgList[i].Attrs != Attribute::None)
3610 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs));
3614 return Error(CallLoc, "not enough parameters specified for call");
3616 if (FnAttrs != Attribute::None)
3617 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs));
3619 // Finish off the Attributes and check them
3620 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end());
3622 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end());
3623 CI->setTailCall(isTail);
3624 CI->setCallingConv(CC);
3625 CI->setAttributes(PAL);
3630 //===----------------------------------------------------------------------===//
3631 // Memory Instructions.
3632 //===----------------------------------------------------------------------===//
3635 /// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)?
3636 /// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)?
3637 bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS,
3638 BasicBlock* BB, bool isAlloca) {
3639 PATypeHolder Ty(Type::getVoidTy(Context));
3642 unsigned Alignment = 0;
3643 if (ParseType(Ty)) return true;
3645 if (EatIfPresent(lltok::comma)) {
3646 if (Lex.getKind() == lltok::kw_align
3647 || Lex.getKind() == lltok::NamedOrCustomMD) {
3648 if (ParseOptionalInfo(Alignment)) return true;
3650 if (ParseTypeAndValue(Size, SizeLoc, PFS)) return true;
3651 if (EatIfPresent(lltok::comma))
3652 if (ParseOptionalInfo(Alignment)) return true;
3656 if (Size && Size->getType() != Type::getInt32Ty(Context))
3657 return Error(SizeLoc, "element count must be i32");
3660 Inst = new AllocaInst(Ty, Size, Alignment);
3664 // Autoupgrade old malloc instruction to malloc call.
3665 // FIXME: Remove in LLVM 3.0.
3666 const Type *IntPtrTy = Type::getInt32Ty(Context);
3667 Constant *AllocSize = ConstantExpr::getSizeOf(Ty);
3668 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, IntPtrTy);
3670 // Prototype malloc as "void *(int32)".
3671 // This function is renamed as "malloc" in ValidateEndOfModule().
3672 MallocF = cast<Function>(
3673 M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL));
3674 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, AllocSize, Size, MallocF);
3679 /// ::= 'free' TypeAndValue
3680 bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS,
3682 Value *Val; LocTy Loc;
3683 if (ParseTypeAndValue(Val, Loc, PFS)) return true;
3684 if (!isa<PointerType>(Val->getType()))
3685 return Error(Loc, "operand to free must be a pointer");
3686 Inst = CallInst::CreateFree(Val, BB);
3691 /// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)?
3692 bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS,
3694 Value *Val; LocTy Loc;
3695 unsigned Alignment = 0;
3696 if (ParseTypeAndValue(Val, Loc, PFS)) return true;
3698 if (EatIfPresent(lltok::comma))
3699 if (ParseOptionalInfo(Alignment)) return true;
3701 if (!isa<PointerType>(Val->getType()) ||
3702 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType())
3703 return Error(Loc, "load operand must be a pointer to a first class type");
3705 Inst = new LoadInst(Val, "", isVolatile, Alignment);
3710 /// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)?
3711 bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS,
3713 Value *Val, *Ptr; LocTy Loc, PtrLoc;
3714 unsigned Alignment = 0;
3715 if (ParseTypeAndValue(Val, Loc, PFS) ||
3716 ParseToken(lltok::comma, "expected ',' after store operand") ||
3717 ParseTypeAndValue(Ptr, PtrLoc, PFS))
3720 if (EatIfPresent(lltok::comma))
3721 if (ParseOptionalInfo(Alignment)) return true;
3723 if (!isa<PointerType>(Ptr->getType()))
3724 return Error(PtrLoc, "store operand must be a pointer");
3725 if (!Val->getType()->isFirstClassType())
3726 return Error(Loc, "store operand must be a first class value");
3727 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType())
3728 return Error(Loc, "stored value and pointer type do not match");
3730 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment);
3735 /// ::= 'getresult' TypeAndValue ',' i32
3736 /// FIXME: Remove support for getresult in LLVM 3.0
3737 bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) {
3738 Value *Val; LocTy ValLoc, EltLoc;
3740 if (ParseTypeAndValue(Val, ValLoc, PFS) ||
3741 ParseToken(lltok::comma, "expected ',' after getresult operand") ||
3742 ParseUInt32(Element, EltLoc))
3745 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType()))
3746 return Error(ValLoc, "getresult inst requires an aggregate operand");
3747 if (!ExtractValueInst::getIndexedType(Val->getType(), Element))
3748 return Error(EltLoc, "invalid getresult index for value");
3749 Inst = ExtractValueInst::Create(Val, Element);
3753 /// ParseGetElementPtr
3754 /// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)*
3755 bool LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) {
3756 Value *Ptr, *Val; LocTy Loc, EltLoc;
3758 bool InBounds = EatIfPresent(lltok::kw_inbounds);
3760 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true;
3762 if (!isa<PointerType>(Ptr->getType()))
3763 return Error(Loc, "base of getelementptr must be a pointer");
3765 SmallVector<Value*, 16> Indices;
3766 while (EatIfPresent(lltok::comma)) {
3767 if (Lex.getKind() == lltok::NamedOrCustomMD)
3769 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true;
3770 if (!isa<IntegerType>(Val->getType()))
3771 return Error(EltLoc, "getelementptr index must be an integer");
3772 Indices.push_back(Val);
3774 if (Lex.getKind() == lltok::NamedOrCustomMD)
3775 if (ParseOptionalCustomMetadata()) return true;
3777 if (!GetElementPtrInst::getIndexedType(Ptr->getType(),
3778 Indices.begin(), Indices.end()))
3779 return Error(Loc, "invalid getelementptr indices");
3780 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end());
3782 cast<GetElementPtrInst>(Inst)->setIsInBounds(true);
3786 /// ParseExtractValue
3787 /// ::= 'extractvalue' TypeAndValue (',' uint32)+
3788 bool LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) {
3789 Value *Val; LocTy Loc;
3790 SmallVector<unsigned, 4> Indices;
3791 if (ParseTypeAndValue(Val, Loc, PFS) ||
3792 ParseIndexList(Indices))
3794 if (Lex.getKind() == lltok::NamedOrCustomMD)
3795 if (ParseOptionalCustomMetadata()) return true;
3797 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType()))
3798 return Error(Loc, "extractvalue operand must be array or struct");
3800 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(),
3802 return Error(Loc, "invalid indices for extractvalue");
3803 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end());
3807 /// ParseInsertValue
3808 /// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+
3809 bool LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) {
3810 Value *Val0, *Val1; LocTy Loc0, Loc1;
3811 SmallVector<unsigned, 4> Indices;
3812 if (ParseTypeAndValue(Val0, Loc0, PFS) ||
3813 ParseToken(lltok::comma, "expected comma after insertvalue operand") ||
3814 ParseTypeAndValue(Val1, Loc1, PFS) ||
3815 ParseIndexList(Indices))
3817 if (Lex.getKind() == lltok::NamedOrCustomMD)
3818 if (ParseOptionalCustomMetadata()) return true;
3820 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType()))
3821 return Error(Loc0, "extractvalue operand must be array or struct");
3823 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(),
3825 return Error(Loc0, "invalid indices for insertvalue");
3826 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end());
3830 //===----------------------------------------------------------------------===//
3831 // Embedded metadata.
3832 //===----------------------------------------------------------------------===//
3834 /// ParseMDNodeVector
3835 /// ::= Element (',' Element)*
3837 /// ::= 'null' | TypeAndValue
3838 bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) {
3839 assert(Lex.getKind() == lltok::lbrace);
3843 if (Lex.getKind() == lltok::kw_null) {
3847 PATypeHolder Ty(Type::getVoidTy(Context));
3848 if (ParseType(Ty)) return true;
3849 if (Lex.getKind() == lltok::Metadata) {
3851 MetadataBase *Node = 0;
3852 if (!ParseMDNode(Node))
3855 MetadataBase *MDS = 0;
3856 if (ParseMDString(MDS)) return true;
3861 if (ParseGlobalValue(Ty, C)) return true;
3866 } while (EatIfPresent(lltok::comma));