microsoft
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clang-1
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clang-1/lib/AST/DeclBase.cpp

350 строки
13 KiB
C++
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//===--- DeclBase.cpp - Declaration AST Node 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 Decl and DeclContext classes.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/ASTContext.h"
#include "llvm/ADT/DenseMap.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Statistics
//===----------------------------------------------------------------------===//
// temporary statistics gathering
static unsigned nFuncs = 0;
static unsigned nVars = 0;
static unsigned nParmVars = 0;
static unsigned nSUC = 0;
static unsigned nCXXSUC = 0;
static unsigned nEnumConst = 0;
static unsigned nEnumDecls = 0;
static unsigned nNamespaces = 0;
static unsigned nTypedef = 0;
static unsigned nFieldDecls = 0;
static unsigned nCXXFieldDecls = 0;
static unsigned nInterfaceDecls = 0;
static unsigned nClassDecls = 0;
static unsigned nMethodDecls = 0;
static unsigned nProtocolDecls = 0;
static unsigned nForwardProtocolDecls = 0;
static unsigned nCategoryDecls = 0;
static unsigned nIvarDecls = 0;
static unsigned nAtDefsFieldDecls = 0;
static unsigned nObjCImplementationDecls = 0;
static unsigned nObjCCategoryImpl = 0;
static unsigned nObjCCompatibleAlias = 0;
static unsigned nObjCPropertyDecl = 0;
static unsigned nObjCPropertyImplDecl = 0;
static unsigned nLinkageSpecDecl = 0;
static unsigned nFileScopeAsmDecl = 0;
static bool StatSwitch = false;
// This keeps track of all decl attributes. Since so few decls have attrs, we
// keep them in a hash map instead of wasting space in the Decl class.
typedef llvm::DenseMap<const Decl*, Attr*> DeclAttrMapTy;
static DeclAttrMapTy *DeclAttrs = 0;
const char *Decl::getDeclKindName() const {
switch (DeclKind) {
default: assert(0 && "Unknown decl kind!");
case Namespace: return "Namespace";
case Typedef: return "Typedef";
case Function: return "Function";
case Var: return "Var";
case ParmVar: return "ParmVar";
case EnumConstant: return "EnumConstant";
case ObjCIvar: return "ObjCIvar";
case ObjCInterface: return "ObjCInterface";
case ObjCClass: return "ObjCClass";
case ObjCMethod: return "ObjCMethod";
case ObjCProtocol: return "ObjCProtocol";
case ObjCForwardProtocol: return "ObjCForwardProtocol";
case Struct: return "Struct";
case Union: return "Union";
case Class: return "Class";
case Enum: return "Enum";
}
}
bool Decl::CollectingStats(bool Enable) {
if (Enable)
StatSwitch = true;
return StatSwitch;
}
void Decl::PrintStats() {
fprintf(stderr, "*** Decl Stats:\n");
fprintf(stderr, " %d decls total.\n",
int(nFuncs+nVars+nParmVars+nFieldDecls+nSUC+nCXXFieldDecls+nCXXSUC+
nEnumDecls+nEnumConst+nTypedef+nInterfaceDecls+nClassDecls+
nMethodDecls+nProtocolDecls+nCategoryDecls+nIvarDecls+
nAtDefsFieldDecls+nNamespaces));
fprintf(stderr, " %d namespace decls, %d each (%d bytes)\n",
nNamespaces, (int)sizeof(NamespaceDecl),
int(nNamespaces*sizeof(NamespaceDecl)));
fprintf(stderr, " %d function decls, %d each (%d bytes)\n",
nFuncs, (int)sizeof(FunctionDecl), int(nFuncs*sizeof(FunctionDecl)));
fprintf(stderr, " %d variable decls, %d each (%d bytes)\n",
nVars, (int)sizeof(VarDecl),
int(nVars*sizeof(VarDecl)));
fprintf(stderr, " %d parameter variable decls, %d each (%d bytes)\n",
nParmVars, (int)sizeof(ParmVarDecl),
int(nParmVars*sizeof(ParmVarDecl)));
fprintf(stderr, " %d field decls, %d each (%d bytes)\n",
nFieldDecls, (int)sizeof(FieldDecl),
int(nFieldDecls*sizeof(FieldDecl)));
fprintf(stderr, " %d @defs generated field decls, %d each (%d bytes)\n",
nAtDefsFieldDecls, (int)sizeof(ObjCAtDefsFieldDecl),
int(nAtDefsFieldDecls*sizeof(ObjCAtDefsFieldDecl)));
fprintf(stderr, " %d struct/union/class decls, %d each (%d bytes)\n",
nSUC, (int)sizeof(RecordDecl),
int(nSUC*sizeof(RecordDecl)));
fprintf(stderr, " %d C++ field decls, %d each (%d bytes)\n",
nCXXFieldDecls, (int)sizeof(CXXFieldDecl),
int(nCXXFieldDecls*sizeof(CXXFieldDecl)));
fprintf(stderr, " %d C++ struct/union/class decls, %d each (%d bytes)\n",
nCXXSUC, (int)sizeof(CXXRecordDecl),
int(nCXXSUC*sizeof(CXXRecordDecl)));
fprintf(stderr, " %d enum decls, %d each (%d bytes)\n",
nEnumDecls, (int)sizeof(EnumDecl),
int(nEnumDecls*sizeof(EnumDecl)));
fprintf(stderr, " %d enum constant decls, %d each (%d bytes)\n",
nEnumConst, (int)sizeof(EnumConstantDecl),
int(nEnumConst*sizeof(EnumConstantDecl)));
fprintf(stderr, " %d typedef decls, %d each (%d bytes)\n",
nTypedef, (int)sizeof(TypedefDecl),int(nTypedef*sizeof(TypedefDecl)));
// Objective-C decls...
fprintf(stderr, " %d interface decls, %d each (%d bytes)\n",
nInterfaceDecls, (int)sizeof(ObjCInterfaceDecl),
int(nInterfaceDecls*sizeof(ObjCInterfaceDecl)));
fprintf(stderr, " %d instance variable decls, %d each (%d bytes)\n",
nIvarDecls, (int)sizeof(ObjCIvarDecl),
int(nIvarDecls*sizeof(ObjCIvarDecl)));
fprintf(stderr, " %d class decls, %d each (%d bytes)\n",
nClassDecls, (int)sizeof(ObjCClassDecl),
int(nClassDecls*sizeof(ObjCClassDecl)));
fprintf(stderr, " %d method decls, %d each (%d bytes)\n",
nMethodDecls, (int)sizeof(ObjCMethodDecl),
int(nMethodDecls*sizeof(ObjCMethodDecl)));
fprintf(stderr, " %d protocol decls, %d each (%d bytes)\n",
nProtocolDecls, (int)sizeof(ObjCProtocolDecl),
int(nProtocolDecls*sizeof(ObjCProtocolDecl)));
fprintf(stderr, " %d forward protocol decls, %d each (%d bytes)\n",
nForwardProtocolDecls, (int)sizeof(ObjCForwardProtocolDecl),
int(nForwardProtocolDecls*sizeof(ObjCForwardProtocolDecl)));
fprintf(stderr, " %d category decls, %d each (%d bytes)\n",
nCategoryDecls, (int)sizeof(ObjCCategoryDecl),
int(nCategoryDecls*sizeof(ObjCCategoryDecl)));
fprintf(stderr, " %d class implementation decls, %d each (%d bytes)\n",
nObjCImplementationDecls, (int)sizeof(ObjCImplementationDecl),
int(nObjCImplementationDecls*sizeof(ObjCImplementationDecl)));
fprintf(stderr, " %d class implementation decls, %d each (%d bytes)\n",
nObjCCategoryImpl, (int)sizeof(ObjCCategoryImplDecl),
int(nObjCCategoryImpl*sizeof(ObjCCategoryImplDecl)));
fprintf(stderr, " %d compatibility alias decls, %d each (%d bytes)\n",
nObjCCompatibleAlias, (int)sizeof(ObjCCompatibleAliasDecl),
int(nObjCCompatibleAlias*sizeof(ObjCCompatibleAliasDecl)));
fprintf(stderr, " %d property decls, %d each (%d bytes)\n",
nObjCPropertyDecl, (int)sizeof(ObjCPropertyDecl),
int(nObjCPropertyDecl*sizeof(ObjCPropertyDecl)));
fprintf(stderr, " %d property implementation decls, %d each (%d bytes)\n",
nObjCPropertyImplDecl, (int)sizeof(ObjCPropertyImplDecl),
int(nObjCPropertyImplDecl*sizeof(ObjCPropertyImplDecl)));
fprintf(stderr, "Total bytes = %d\n",
int(nFuncs*sizeof(FunctionDecl)+
nVars*sizeof(VarDecl)+nParmVars*sizeof(ParmVarDecl)+
nFieldDecls*sizeof(FieldDecl)+nSUC*sizeof(RecordDecl)+
nCXXFieldDecls*sizeof(CXXFieldDecl)+nCXXSUC*sizeof(CXXRecordDecl)+
nEnumDecls*sizeof(EnumDecl)+nEnumConst*sizeof(EnumConstantDecl)+
nTypedef*sizeof(TypedefDecl)+
nInterfaceDecls*sizeof(ObjCInterfaceDecl)+
nIvarDecls*sizeof(ObjCIvarDecl)+
nClassDecls*sizeof(ObjCClassDecl)+
nMethodDecls*sizeof(ObjCMethodDecl)+
nProtocolDecls*sizeof(ObjCProtocolDecl)+
nForwardProtocolDecls*sizeof(ObjCForwardProtocolDecl)+
nCategoryDecls*sizeof(ObjCCategoryDecl)+
nObjCImplementationDecls*sizeof(ObjCImplementationDecl)+
nObjCCategoryImpl*sizeof(ObjCCategoryImplDecl)+
nObjCCompatibleAlias*sizeof(ObjCCompatibleAliasDecl)+
nObjCPropertyDecl*sizeof(ObjCPropertyDecl)+
nObjCPropertyImplDecl*sizeof(ObjCPropertyImplDecl)+
nLinkageSpecDecl*sizeof(LinkageSpecDecl)+
nFileScopeAsmDecl*sizeof(FileScopeAsmDecl)+
nNamespaces*sizeof(NamespaceDecl)));
}
void Decl::addDeclKind(Kind k) {
switch (k) {
case Namespace: nNamespaces++; break;
case Typedef: nTypedef++; break;
case Function: nFuncs++; break;
case Var: nVars++; break;
case ParmVar: nParmVars++; break;
case EnumConstant: nEnumConst++; break;
case Field: nFieldDecls++; break;
case Struct: case Union: case Class: nSUC++; break;
case Enum: nEnumDecls++; break;
case ObjCInterface: nInterfaceDecls++; break;
case ObjCClass: nClassDecls++; break;
case ObjCMethod: nMethodDecls++; break;
case ObjCProtocol: nProtocolDecls++; break;
case ObjCForwardProtocol: nForwardProtocolDecls++; break;
case ObjCCategory: nCategoryDecls++; break;
case ObjCIvar: nIvarDecls++; break;
case ObjCAtDefsField: nAtDefsFieldDecls++; break;
case ObjCImplementation: nObjCImplementationDecls++; break;
case ObjCCategoryImpl: nObjCCategoryImpl++; break;
case ObjCCompatibleAlias: nObjCCompatibleAlias++; break;
case ObjCProperty: nObjCPropertyDecl++; break;
case ObjCPropertyImpl: nObjCPropertyImplDecl++; break;
case LinkageSpec: nLinkageSpecDecl++; break;
case FileScopeAsm: nFileScopeAsmDecl++; break;
case ImplicitParam:
case TranslationUnit: break;
case CXXField: nCXXFieldDecls++; break;
case CXXStruct: case CXXUnion: case CXXClass: nCXXSUC++; break;
// FIXME: Statistics for C++ decls.
case CXXMethod:
case CXXClassVar:
break;
}
}
//===----------------------------------------------------------------------===//
// Decl Implementation
//===----------------------------------------------------------------------===//
// Out-of-line virtual method providing a home for Decl.
Decl::~Decl() {
if (!HasAttrs)
return;
DeclAttrMapTy::iterator it = DeclAttrs->find(this);
assert(it != DeclAttrs->end() && "No attrs found but HasAttrs is true!");
// release attributes.
delete it->second;
invalidateAttrs();
}
void Decl::addAttr(Attr *NewAttr) {
if (!DeclAttrs)
DeclAttrs = new DeclAttrMapTy();
Attr *&ExistingAttr = (*DeclAttrs)[this];
NewAttr->setNext(ExistingAttr);
ExistingAttr = NewAttr;
HasAttrs = true;
}
void Decl::invalidateAttrs() {
if (!HasAttrs) return;
HasAttrs = false;
(*DeclAttrs)[this] = 0;
DeclAttrs->erase(this);
if (DeclAttrs->empty()) {
delete DeclAttrs;
DeclAttrs = 0;
}
}
const Attr *Decl::getAttrs() const {
if (!HasAttrs)
return 0;
return (*DeclAttrs)[this];
}
void Decl::swapAttrs(Decl *RHS) {
bool HasLHSAttr = this->HasAttrs;
bool HasRHSAttr = RHS->HasAttrs;
// Usually, neither decl has attrs, nothing to do.
if (!HasLHSAttr && !HasRHSAttr) return;
// If 'this' has no attrs, swap the other way.
if (!HasLHSAttr)
return RHS->swapAttrs(this);
// Handle the case when both decls have attrs.
if (HasRHSAttr) {
std::swap((*DeclAttrs)[this], (*DeclAttrs)[RHS]);
return;
}
// Otherwise, LHS has an attr and RHS doesn't.
(*DeclAttrs)[RHS] = (*DeclAttrs)[this];
(*DeclAttrs).erase(this);
this->HasAttrs = false;
RHS->HasAttrs = true;
}
void Decl::Destroy(ASTContext& C) {
if (ScopedDecl* SD = dyn_cast<ScopedDecl>(this)) {
// Observe the unrolled recursion. By setting N->NextDeclarator = 0x0
// within the loop, only the Destroy method for the first ScopedDecl
// will deallocate all of the ScopedDecls in a chain.
ScopedDecl* N = SD->getNextDeclarator();
while (N) {
ScopedDecl* Tmp = N->getNextDeclarator();
N->NextDeclarator = 0x0;
N->Destroy(C);
N = Tmp;
}
}
this->~Decl();
C.getAllocator().Deallocate((void *)this);
}
//===----------------------------------------------------------------------===//
// DeclContext Implementation
//===----------------------------------------------------------------------===//
DeclContext *DeclContext::getParent() const {
if (ScopedDecl *SD = dyn_cast<ScopedDecl>(this))
return SD->getDeclContext();
else
return NULL;
}
Decl *DeclContext::ToDecl (const DeclContext *D) {
return CastTo<Decl>(D);
}
DeclContext *DeclContext::FromDecl (const Decl *D) {
return CastTo<DeclContext>(D);
}
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