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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
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
//===--- TransARCAssign.cpp - Transformations to ARC mode -----------------===//
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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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// makeAssignARCSafe:
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//
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// Add '__strong' where appropriate.
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//
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// for (id x in collection) {
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// x = 0;
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// }
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// ---->
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// for (__strong id x in collection) {
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// x = 0;
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// }
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//
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//===----------------------------------------------------------------------===//
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#include "Transforms.h"
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#include "Internals.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/Sema/SemaDiagnostic.h"
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using namespace clang;
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using namespace arcmt;
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using namespace trans;
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namespace {
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class ARCAssignChecker : public RecursiveASTVisitor<ARCAssignChecker> {
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MigrationPass &Pass;
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llvm::DenseSet<VarDecl *> ModifiedVars;
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public:
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ARCAssignChecker(MigrationPass &pass) : Pass(pass) { }
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bool VisitBinaryOperator(BinaryOperator *Exp) {
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if (Exp->getType()->isDependentType())
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return true;
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Expr *E = Exp->getLHS();
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SourceLocation OrigLoc = E->getExprLoc();
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SourceLocation Loc = OrigLoc;
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DeclRefExpr *declRef = dyn_cast<DeclRefExpr>(E->IgnoreParenCasts());
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if (declRef && isa<VarDecl>(declRef->getDecl())) {
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ASTContext &Ctx = Pass.Ctx;
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Expr::isModifiableLvalueResult IsLV = E->isModifiableLvalue(Ctx, &Loc);
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if (IsLV != Expr::MLV_ConstQualified)
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return true;
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VarDecl *var = cast<VarDecl>(declRef->getDecl());
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if (var->isARCPseudoStrong()) {
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Transaction Trans(Pass.TA);
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if (Pass.TA.clearDiagnostic(diag::err_typecheck_arr_assign_enumeration,
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Exp->getOperatorLoc())) {
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if (!ModifiedVars.count(var)) {
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TypeLoc TLoc = var->getTypeSourceInfo()->getTypeLoc();
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Pass.TA.insert(TLoc.getBeginLoc(), "__strong ");
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ModifiedVars.insert(var);
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}
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}
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}
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}
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return true;
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}
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};
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} // anonymous namespace
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void trans::makeAssignARCSafe(MigrationPass &pass) {
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ARCAssignChecker assignCheck(pass);
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assignCheck.TraverseDecl(pass.Ctx.getTranslationUnitDecl());
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}
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