Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/lib/ARCMigrate/TransARCAssign.cpp
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//===--- 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())88
) {
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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 true80
;
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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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}