akhuang added inline comments.
================
Comment at: clang/include/clang/Basic/Attr.td:1665
+ let Spellings = [Clang<"force_debug_if_required_type">];
+ let Subjects = SubjectList<[CXXRecord]>;
+ let Documentation = [Undocumented];
----------------
dblaikie wrote:
> aaron.ballman wrote:
> > Does this attribute have effect in C? If so, this should be `Record`
> > instead of `CXXRecord`. If not, should this get a `LangOpts` field so the
> > attribute is explicitly unused in C?
> Seems (at least based on some limited testing I just did) we don't do type
> homing in C at all, even the basic "is the type required to be complete" sort
> of thing, like this:
> ```
> struct s { int i; };
> struct s *g;
> ```
> compiled as C, that produces a definition of `s`, compiled as C++ it produces
> a declaration of `s`
>
> (& because I was curious - we don't home enums under these rules (we handle
> enums differently anyway - because sometimes they're used as bags of
> constants, so we have to preserve their definition even when they're not
> referenced through the usual function/variable type links, etc))
Yep, there's a check for `LangOpts.CPlusPlus` before the debug optimizations.
Maybe should change it to `Record` anyway, even though it does nothing in C at
the moment.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D97411/new/
https://reviews.llvm.org/D97411
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