From: Lehua Ding
Hi,
When I was adding the new RISC-V auto-vectorization function, I found that
converting `vector-reg1 vop vector-vreg2` to `scalar-reg3 vop vectorreg2` is
not very easy to handle where `vector-reg1` is a vec_duplicate_expr. For
example the bellow gimple IR:
```gimple
vect_
From: Lehua Ding
ps: Resend for adjusting the width of each line of text.
Hi,
When I was adding the new RISC-V auto-vectorization function, I found that
converting `vector-reg1 vop vector-vreg2` to `scalar-reg3 vop vectorreg2`
is not very easy to handle where `vector-reg1` is a vec_duplicate_ex
this patch, we hope this can be done
in GCC 14.
Thank you so much.
juzhe.zh...@rivai.ai
From: lehua.ding
Date: 2023-01-13 17:42
To: gcc-patches
CC: richard.sandiford; juzhe.zhong; Lehua Ding
Subject: [PATCH 1/1] [fwprop]: Add the support of forwarding the vec_duplicate
rtx
From: Lehua Ding
lehua.d...@rivai.ai writes:
> From: Lehua Ding
>
> ps: Resend for adjusting the width of each line of text.
>
> Hi,
>
> When I was adding the new RISC-V auto-vectorization function, I found that
> converting `vector-reg1 vop vector-vreg2` to `scalar-reg3 vop vectorreg2`
> is not very easy to handl
On 1/17/23 09:00, Richard Sandiford via Gcc-patches wrote:
But the idea of the fwprop change looks OK to me in principle.
What we have now seems conservative, based on heuristics that
haven't been updated in a long time. So relaxing them a bit seems
like a good idea. IIRC Jeff had another
> I don't think this pattern is correct, because SEL isn't commutative
> in the vector operands.
Indeed, I think I should invert PRED operand or the comparison
operator which produce the PRED operand first.
> I think this should be:
>
> if (...)
> to = XEXP (to, 0);>
> and should be before
"丁乐华" writes:
> > I don't think this pattern is correct, because SEL isn't commutative
> > in the vector operands.
>
> Indeed, I think I should invert PRED operand or the comparison
> operator which produce the PRED operand first.
That would work, but it would no longer be a win. The vectoriser
