On Wed, Jan 21, 2015 at 2:18 PM, Reid Kleckner <[email protected]> wrote: > Author: rnk > Date: Wed Jan 21 16:18:17 2015 > New Revision: 226707 > > URL: http://llvm.org/viewvc/llvm-project?rev=226707&view=rev > Log: > Add the "thunk" attribute to MS ABI virtual member pointers > > This attribute implies indicates that the function musttail calls > another function and returns whatever it returns. The return type of the > thunk is meaningless, as the thunk can dynamically call different > functions with different return types. So long as the callers bitcast > the thunk with the correct type, behavior is well defined. > > This attribute was necessary to fix PR20944, where the indirect call > combiner noticed that the thunk returned void and replaced the results > of the indirect call instruction with undef. > > Over-the-shoulder reviewed by David Majnemer.
Is this a fix we want in 3.6? _______________________________________________ cfe-commits mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
