On Sat, 2023-09-09 at 15:14 +0800, chenglulu wrote:
>
> 在 2023/9/9 下午3:06, Xi Ruoyao 写道:
> > On Sat, 2023-09-09 at 15:04 +0800, chenglulu wrote:
> > > Hi,RuoYao:
> > >
> > > I think the test example memcpy-vec-3.c submitted in r14-3818 is
> > > implemented incorrectly.
> > >
> > > The 16-byte length in this test example will cause can_move_by_pieces to
> > > return true when with '-mstrict-align', so no vector load instructions
> > > will be generated.
> > Yes, in this case we cannot use vst because we don't know if b is
> > aligned. Thus a { scan-assembler-not "vst" } guarantees that.
> >
> > Or am I understanding something wrongly here?
> >
> Well, what I mean is that even if '-mno-strict-align' is used here,
> vst/vld will not be used,
>
> so this test example cannot test what we want to test.
Let me revise it...
--
Xi Ruoyao <xry...@xry111.site>
School of Aerospace Science and Technology, Xidian University
