This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: PATCH: testsuite/37074: gcc.dg/torture/stackalign/builtin-apply-4.c failed with SSE2
On Mon, Aug 11, 2008 at 2:57 AM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On Mon, Aug 11, 2008 at 10:18 AM, Ye, Joey <joey.ye@intel.com> wrote:
>
>> Andrew wrote:
>>> Again this does not explain why is happening, just what happens.
>
>> __builtin_apply_args needs to save all args to stack. Following code in
>> ix86_function_arg_regno_p makes it believe mm0 to mm2 are passing
>> arguments.
>> return (regno < REGPARM_MAX
>> || (TARGET_MMX && MMX_REGNO_P (regno)
>> && (regno < FIRST_MMX_REG + MMX_REGPARM_MAX))
>> || (TARGET_SSE && SSE_REGNO_P (regno)
>> && (regno < FIRST_SSE_REG + SSE_REGPARM_MAX)));
>>
>> So mm0 to mm2 are saved and restored. Which arguments are passed via mm0
>> to mm2?
>
> These are MMX vector arguments, V8QImode, V4HImode, V2SImode, V1DImode
> and V2SFmode. Please note, that we also have MMX function return
> register, MMX vector values are returned in %mm0 register.
>
Is my patch OK for trunk?
--
H.J.