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Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- From: Michael Matz <matz at suse dot de>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: Richard Smith <richard at metafoo dot co dot uk>, Matthijs van Duin <matthijsvanduin at gmail dot com>, Jonathan Wakely <jwakely dot gcc at gmail dot com>, GCC Development <gcc at gcc dot gnu dot org>, cfe-commits <cfe-commits at lists dot llvm dot org>
- Date: Thu, 18 Feb 2016 15:35:53 +0100 (CET)
- Subject: Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Authentication-results: sourceware.org; auth=none
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Hi,
On Tue, 16 Feb 2016, H.J. Lu wrote:
> Here is the new definition:
>
> An empty type is a type where it and all of its subobjects (recursively)
> are of class, structure, union, or array type. No memory slot nor
> register should be used to pass or return an object of empty type.
The trivially copyable is gone again. Why is it not necessary?
Ciao,
Michael.
- References:
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct
- Re: RFC: Update Intel386, x86-64 and IA MCU psABIs for passing/returning empty struct