blob: 80bfd22d6258ae3f1e7a028b6b225ce2ba67b0f6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
//===--- TransARCAssign.cpp - Transformations to ARC mode -----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// makeAssignARCSafe:
//
// Add '__strong' where appropriate.
//
// for (id x in collection) {
// x = 0;
// }
// ---->
// for (__strong id x in collection) {
// x = 0;
// }
//
//===----------------------------------------------------------------------===//
#include "Transforms.h"
#include "Internals.h"
#include "clang/AST/ASTContext.h"
#include "clang/Sema/SemaDiagnostic.h"
using namespace clang;
using namespace arcmt;
using namespace trans;
namespace {
class ARCAssignChecker : public RecursiveASTVisitor<ARCAssignChecker> {
MigrationPass &Pass;
llvm::DenseSet<VarDecl *> ModifiedVars;
public:
ARCAssignChecker(MigrationPass &pass) : Pass(pass) { }
bool VisitBinaryOperator(BinaryOperator *Exp) {
if (Exp->getType()->isDependentType())
return true;
Expr *E = Exp->getLHS();
SourceLocation OrigLoc = E->getExprLoc();
SourceLocation Loc = OrigLoc;
DeclRefExpr *declRef = dyn_cast<DeclRefExpr>(E->IgnoreParenCasts());
if (declRef && isa<VarDecl>(declRef->getDecl())) {
ASTContext &Ctx = Pass.Ctx;
Expr::isModifiableLvalueResult IsLV = E->isModifiableLvalue(Ctx, &Loc);
if (IsLV != Expr::MLV_ConstQualified)
return true;
VarDecl *var = cast<VarDecl>(declRef->getDecl());
if (var->isARCPseudoStrong()) {
Transaction Trans(Pass.TA);
if (Pass.TA.clearDiagnostic(diag::err_typecheck_arr_assign_enumeration,
Exp->getOperatorLoc())) {
if (!ModifiedVars.count(var)) {
TypeLoc TLoc = var->getTypeSourceInfo()->getTypeLoc();
Pass.TA.insert(TLoc.getBeginLoc(), "__strong ");
ModifiedVars.insert(var);
}
}
}
}
return true;
}
};
} // anonymous namespace
void trans::makeAssignARCSafe(MigrationPass &pass) {
ARCAssignChecker assignCheck(pass);
assignCheck.TraverseDecl(pass.Ctx.getTranslationUnitDecl());
}
|
