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//===--- Spec.cpp - AST Builder and Semantic Analysis Implementation ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the application of Specification statements to the
// declarations.
//
//===----------------------------------------------------------------------===//
#include "flang/Sema/Sema.h"
#include "flang/Sema/DeclSpec.h"
#include "flang/Sema/SemaDiagnostic.h"
#include "flang/AST/ASTContext.h"
#include "flang/AST/Decl.h"
#include "flang/AST/Expr.h"
#include "flang/AST/Stmt.h"
#include "flang/AST/StorageSet.h"
#include "flang/Basic/Diagnostic.h"
#include "llvm/Support/raw_ostream.h"
namespace flang {
void Sema::ActOnFunctionSpecificationPart() {
/// If necessary, apply the implicit typing rules to the current function and its arguments.
if(auto FD = dyn_cast<FunctionDecl>(CurContext)) {
// function type
if(FD->isNormalFunction() || FD->isStatementFunction()) {
if(FD->getType().isNull()) {
auto Type = ResolveImplicitType(FD->getIdentifier());
if(Type.isNull()) {
Diags.Report(FD->getLocation(), diag::err_func_no_implicit_type)
<< FD->getIdentifier();
// FIXME: add note implicit none was applied here.
}
else SetFunctionType(FD, Type, FD->getLocation(), SourceRange()); //FIXME: proper loc and range
}
}
// arguments
for(auto Arg : FD->getArguments()) {
if(Arg->getType().isNull()) {
ApplyImplicitRulesToArgument(Arg);
}
}
}
}
VarDecl *Sema::GetVariableForSpecification(SourceLocation StmtLoc,
const IdentifierInfo *IDInfo,
SourceLocation IDLoc,
bool CanBeArgument) {
auto Declaration = LookupIdentifier(IDInfo);
if(!Declaration)
return CreateImplicitEntityDecl(Context, IDLoc, IDInfo);
auto VD = dyn_cast<VarDecl>(Declaration);
if(VD && !(VD->isParameter() || (!CanBeArgument && VD->isArgument()) || VD->isFunctionResult()))
return VD;
Diags.Report(StmtLoc, CanBeArgument? diag::err_spec_requires_local_var_arg : diag::err_spec_requires_local_var)
<< IDInfo << getTokenRange(IDLoc);
if(VD) {
Diags.Report(Declaration->getLocation(), diag::note_previous_definition_kind)
<< IDInfo << (VD->isArgument()? 0 : 1)
<< getTokenRange(Declaration->getLocation());
} else
Diags.Report(Declaration->getLocation(), diag::note_previous_definition);
return nullptr;
}
void SpecificationScope::AddDimensionSpec(SourceLocation Loc, SourceLocation IDLoc,
const IdentifierInfo *IDInfo,
ArrayRef<ArraySpec*> Dims) {
if(Dims.empty())
return;
auto Start = Dimensions.size();
Dimensions.append(Dims.begin(), Dims.end());
StoredDimensionSpec Spec = { Loc, IDLoc, IDInfo, unsigned(Start), unsigned(Dims.size()) };
DimensionSpecs.push_back(Spec);
}
bool SpecificationScope::IsDimensionAppliedTo(const IdentifierInfo *IDInfo) const {
for(auto Spec : DimensionSpecs) {
if(Spec.IDInfo == IDInfo) return true;
}
return false;
}
void SpecificationScope::ApplyDimensionSpecs(Sema &Visitor) {
for(auto Spec : DimensionSpecs)
Visitor.ApplyDimensionSpecification(Spec.Loc, Spec.IDLoc, Spec.IDInfo,
llvm::makeArrayRef(Dimensions.begin()+Spec.Offset, Spec.Size));
}
bool Sema::ApplyDimensionSpecification(SourceLocation Loc, SourceLocation IDLoc,
const IdentifierInfo *IDInfo,
ArrayRef<ArraySpec*> Dims) {
auto VD = GetVariableForSpecification(Loc, IDInfo, IDLoc);
if(!VD) return true;
if(isa<ArrayType>(VD->getType())) {
Diags.Report(Loc,
diag::err_spec_dimension_already_array)
<< VD->getIdentifier();
return true;
}
auto T = ActOnArraySpec(Context, VD->getType(), Dims);
bool IsTypeImplicit = VD->isTypeImplicit();
VD->setType(T);
if(T->isArrayType()) {
CheckArrayTypeDeclarationCompability(T->asArrayType(), VD);
VD->MarkUsedAsVariable(Loc);
}
VD->setTypeImplicit(IsTypeImplicit);
return false;
}
void SpecificationScope::AddSaveSpec(SourceLocation Loc, SourceLocation IDLoc,
const IdentifierInfo *IDInfo) {
StoredSaveSpec Spec = { Loc, IDLoc, IDInfo };
SaveSpecs.push_back(Spec);
}
void SpecificationScope::AddSaveSpec(SourceLocation Loc, SourceLocation IDLoc,
CommonBlockDecl *Block) {
StoredSaveCommonBlockSpec Spec = { Loc, IDLoc, Block };
SaveCommonBlockSpecs.push_back(Spec);
}
void SpecificationScope::ApplySaveSpecs(Sema &Visitor) {
for(auto Spec : SaveSpecs)
Visitor.ApplySaveSpecification(Spec.Loc, Spec.IDLoc,
Spec.IDInfo);
for(auto Spec : SaveCommonBlockSpecs)
Visitor.ApplySaveSpecification(Spec.Loc, Spec.IDLoc,
Spec.Block);
}
bool Sema::ApplySaveSpecification(SourceLocation Loc, SourceLocation IDLoc,
const IdentifierInfo *IDInfo) {
if(!IDInfo) {
for(DeclContext::decl_iterator I = CurContext->decls_begin(),
End = CurContext->decls_end(); I != End; ++I) {
auto VD = dyn_cast<VarDecl>(*I);
if(VD && !(VD->isParameter() || VD->isArgument() || VD->isFunctionResult())) {
ApplySaveSpecification(Loc, SourceLocation(), VD);
}
}
return false;
}
auto VD = GetVariableForSpecification(Loc, IDInfo, IDLoc, false);
if(!VD) return true;
return ApplySaveSpecification(Loc, IDLoc, VD);
}
bool Sema::ApplySaveSpecification(SourceLocation Loc, SourceLocation IDLoc,
VarDecl *VD) {
if(VD->hasStorageSet()) {
if(auto CBSet = dyn_cast<CommonBlockSet>(VD->getStorageSet())) {
Diags.Report(Loc, diag::err_spec_not_applicable_to_common_block)
<< "save" << getTokenRange(IDLoc);
return true;
}
}
auto Type = VD->getType();
auto Quals = Type.getQualifiers();
if(Quals.hasAttributeSpec(Qualifiers::AS_save)) {
if(IDLoc.isValid()) {
Diags.Report(Loc, diag::err_spec_qual_reapplication)
<< "save" << VD->getIdentifier() << getTokenRange(IDLoc);
} else {
Diags.Report(Loc, diag::err_spec_qual_reapplication)
<< "save" << VD->getIdentifier();
}
return true;
}
Quals.addAttributeSpecs(Qualifiers::AS_save);
VD->setType(Context.getQualifiedType(Type, Quals));
return false;
}
bool Sema::ApplySaveSpecification(SourceLocation Loc, SourceLocation IDLoc,
CommonBlockDecl *Block) {
return false;
}
void SpecificationScope::AddCommonSpec(SourceLocation Loc, SourceLocation IDLoc,
const IdentifierInfo *IDInfo,
CommonBlockDecl *Block) {
StoredCommonSpec Spec = { Loc, IDLoc, IDInfo, Block };
CommonSpecs.push_back(Spec);
}
class CommonBlockSetBuilder {
public:
llvm::SmallDenseMap<CommonBlockDecl*,
SmallVector<CommonBlockSet::Object, 16>, 8> Sets;
void Add(CommonBlockDecl *CBDecl, CommonBlockSet::Object Object) {
Sets.insert(std::make_pair(CBDecl,SmallVector<CommonBlockSet::Object, 16>())).first->second.push_back(Object);
}
void CreateSets(ASTContext &C) {
for(auto Set : Sets)
Set.first->getStorageSet()->setObjects(C, Set.second);
}
};
void SpecificationScope::ApplyCommonSpecs(Sema &Visitor, CommonBlockSetBuilder &Builder) {
for(auto Spec : CommonSpecs)
Visitor.ApplyCommonSpecification(Spec.Loc, Spec.IDLoc,
Spec.IDInfo, Spec.Block,
Builder);
}
bool Sema::ApplyCommonSpecification(SourceLocation Loc, SourceLocation IDLoc,
const IdentifierInfo *IDInfo,
CommonBlockDecl *Block, CommonBlockSetBuilder &Builder) {
auto VD = GetVariableForSpecification(Loc, IDInfo, IDLoc);
if(!VD) return true;
if(VD->hasStorageSet()) {
if(auto CBSet = dyn_cast<CommonBlockSet>(VD->getStorageSet())) {
Diags.Report(Loc, diag::err_spec_qual_reapplication)
<< "common" << IDInfo
<< getTokenRange(IDLoc);
return true;
}
// FIXME: COMMON + EQUIVALENCE
}
Builder.Add(Block, CommonBlockSet::Object(VD));
VD->setStorageSet(Block->getStorageSet());
return false;
}
/// Applies the specification statements to the declarations.
void Sema::ActOnSpecificationPart() {
ActOnFunctionSpecificationPart();
CurSpecScope->ApplyDimensionSpecs(*this);
CommonBlockSetBuilder CBBuilder;
CurSpecScope->ApplyCommonSpecs(*this, CBBuilder);
CBBuilder.CreateSets(Context);
CurSpecScope->ApplySaveSpecs(*this);
}
} // namespace flang
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