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[Bug target/85939] -mstackrealign does not realign stack with local __m64 variable
- From: "fw at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 27 May 2018 15:42:25 +0000
- Subject: [Bug target/85939] -mstackrealign does not realign stack with local __m64 variable
- Auto-submitted: auto-generated
- References: <bug-85939-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85939
--- Comment #3 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #1)
> Please also use -mincoming-stack-boundary=2 to tell the compiler about
> possible incoming stack (mis)alignment.
This does change the result; alignment is performed. This is not documented.
I'm not sure what the intent is here.
(In reply to Uroš Bizjak from comment #2)
> FYI, -mstackrealign applies only to main ().
I don't think this is true. In the example, stack alignment is performed if I
use __m128 instead of __m64.