2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
119 lines
2.9 KiB
C++
119 lines
2.9 KiB
C++
//===- StmtIterator.cpp - Iterators for Statements ------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines internal methods for StmtIterator.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/StmtIterator.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/Type.h"
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#include "clang/Basic/LLVM.h"
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#include "llvm/Support/Casting.h"
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#include <cassert>
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#include <cstdint>
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using namespace clang;
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// FIXME: Add support for dependent-sized array types in C++?
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// Does it even make sense to build a CFG for an uninstantiated template?
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static inline const VariableArrayType *FindVA(const Type* t) {
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while (const ArrayType *vt = dyn_cast<ArrayType>(t)) {
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if (const VariableArrayType *vat = dyn_cast<VariableArrayType>(vt))
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if (vat->getSizeExpr())
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return vat;
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t = vt->getElementType().getTypePtr();
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}
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return nullptr;
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}
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void StmtIteratorBase::NextVA() {
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assert(getVAPtr());
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const VariableArrayType *p = getVAPtr();
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p = FindVA(p->getElementType().getTypePtr());
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setVAPtr(p);
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if (p)
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return;
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if (inDeclGroup()) {
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if (VarDecl* VD = dyn_cast<VarDecl>(*DGI))
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if (VD->hasInit())
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return;
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NextDecl();
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}
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else {
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assert(inSizeOfTypeVA());
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RawVAPtr = 0;
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}
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}
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void StmtIteratorBase::NextDecl(bool ImmediateAdvance) {
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assert(getVAPtr() == nullptr);
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assert(inDeclGroup());
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if (ImmediateAdvance)
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++DGI;
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for ( ; DGI != DGE; ++DGI)
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if (HandleDecl(*DGI))
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return;
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RawVAPtr = 0;
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}
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bool StmtIteratorBase::HandleDecl(Decl* D) {
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if (VarDecl* VD = dyn_cast<VarDecl>(D)) {
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if (const VariableArrayType* VAPtr = FindVA(VD->getType().getTypePtr())) {
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setVAPtr(VAPtr);
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return true;
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}
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if (VD->getInit())
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return true;
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}
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else if (TypedefNameDecl* TD = dyn_cast<TypedefNameDecl>(D)) {
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if (const VariableArrayType* VAPtr =
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FindVA(TD->getUnderlyingType().getTypePtr())) {
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setVAPtr(VAPtr);
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return true;
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}
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}
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else if (EnumConstantDecl* ECD = dyn_cast<EnumConstantDecl>(D)) {
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if (ECD->getInitExpr())
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return true;
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}
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return false;
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}
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StmtIteratorBase::StmtIteratorBase(Decl** dgi, Decl** dge)
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: DGI(dgi), RawVAPtr(DeclGroupMode), DGE(dge) {
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NextDecl(false);
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}
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StmtIteratorBase::StmtIteratorBase(const VariableArrayType* t)
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: DGI(nullptr), RawVAPtr(SizeOfTypeVAMode) {
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RawVAPtr |= reinterpret_cast<uintptr_t>(t);
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}
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Stmt*& StmtIteratorBase::GetDeclExpr() const {
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if (const VariableArrayType* VAPtr = getVAPtr()) {
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assert(VAPtr->SizeExpr);
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return const_cast<Stmt*&>(VAPtr->SizeExpr);
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}
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assert(inDeclGroup());
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VarDecl* VD = cast<VarDecl>(*DGI);
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return *VD->getInitAddress();
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}
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