Warn if direct accessing synthesized ivar backing the property in
nonofragile-abi2. Fixes //rdar://8673791 llvm-svn: 119543
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@ -2698,6 +2698,9 @@ def note_condition_assign_to_comparison : Note<
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def note_condition_assign_silence : Note<
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"place parentheses around the assignment to silence this warning">;
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def warn_synthesized_ivar_access : Warning<
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"direct access of synthesized ivar by using property access %0">,
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InGroup<NonfragileAbi2>, DefaultIgnore;
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def warn_ivar_variable_conflict : Warning<
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"when default property synthesis is on, "
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"%0 lookup will access property ivar instead of global variable">,
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@ -1446,10 +1446,16 @@ ExprResult Sema::ActOnIdExpression(Scope *S,
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if (Ex) return Owned(Ex);
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// Synthesize ivars lazily
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if (getLangOptions().ObjCNonFragileABI2) {
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if (SynthesizeProvisionalIvar(*this, R, II, NameLoc))
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if (SynthesizeProvisionalIvar(*this, R, II, NameLoc)) {
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if (const ObjCPropertyDecl *Property =
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canSynthesizeProvisionalIvar(II)) {
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Diag(NameLoc, diag::warn_synthesized_ivar_access) << II;
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Diag(Property->getLocation(), diag::note_property_declare);
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}
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return ActOnIdExpression(S, SS, Id, HasTrailingLParen,
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isAddressOfOperand);
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}
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}
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// for further use, this must be set to false if in class method.
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IvarLookupFollowUp = getCurMethodDecl()->isInstanceMethod();
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}
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@ -0,0 +1,14 @@
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// RUN: %clang_cc1 -Wnonfragile-abi2 -fsyntax-only -fobjc-nonfragile-abi2 -verify %s
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// rdar://8673791
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@interface I {
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}
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@property int IVAR; // expected-note {{property declared here}}
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- (int) OK;
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@end
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@implementation I
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- (int) Meth { return IVAR; } // expected-warning {{direct access of synthesized ivar by using property access 'IVAR'}}
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- (int) OK { return self.IVAR; }
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@end
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