[llvm-dev] [DebugInfo] Enabling constructor homing by default in clang

[David Blaikie via llvm-dev]

Thanks Amy! + a few folks to highlight this.

On Thu, Jul 15, 2021 at 11:06 AM Amy Huang via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> A while back I tried turning on constructor homing
> (-debug-info-kind=constructor) by default in clang. Ctor homing is a debug
> info optimization that reduces the amount of debug info that is emitted for
> class types.
>
> The main blocker was that for some libc++ types we avoid calling the
> constructor. Since then I've added a attribute for classes that ignores
> ctor homing (`__attribute__((standlone_debug))`) and added it to the libc++
> types (7c2f58278e66).
>
> I think at this point we can try enabling it by default in Clang -- it's
> currently being used in chromium and google codebases. Thought I'd email
> the llvm-dev list in case people have thoughts/opinions/concerns about
> this. (patch is at https://reviews.llvm.org/D106084)
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