My mistake, reworked patch. Tests are still running.
________________________________
From: Richard Biener <richard.guenther@gmail.com>
Sent: 13 December 2021 14:47
To: gcc-patches@gcc.gnu.org <gcc-patches@gcc.gnu.org>; Tobias Burnus <tobias@codesourcery.com>; Joel Hutton <Joel.Hutton@arm.com>; Richard Sandiford <Richard.Sandiford@arm.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>; Richard Biener <rguenther@suse.de>
Subject: Re: GCC 11 backport does not build (no "directly_supported_p") - was: Re: pr103523: Check for PLUS/MINUS support

On December 13, 2021 3:27:50 PM GMT+01:00, Tobias Burnus <tobias@codesourcery.com> wrote:
>Hi Joel,
>
>your patch fails here with:
>
>../../repos/gcc-11-commit/gcc/tree-vect-loop.c:8000:8: error:
>‘directly_supported_p’ was not declared in this scope
>  8000 |   if (!directly_supported_p (PLUS_EXPR, step_vectype)
>       |        ^~~~~~~~~~~~~~~~~~~~
>
>And "git grep" shows that this is only present in:
>
>gcc/tree-vect-loop.c:  if (!directly_supported_p (PLUS_EXPR, step_vectype)
>gcc/tree-vect-loop.c:      || !directly_supported_p (MINUS_EXPR,
>step_vectype))
>
>That's different on mainline, which offers that function.

Just as a reminder, backports need regular bootstrap and regtest validation on the respective branches.

Richard.

>Tobias
>
>On 10.12.21 14:24, Joel Hutton via Gcc-patches wrote:
>> ok for backport to 11?
>> ________________________________
>> From: Richard Sandiford <richard.sandiford@arm.com>
>> Sent: 10 December 2021 10:22
>> To: Joel Hutton <Joel.Hutton@arm.com>
>> Cc: GCC Patches <gcc-patches@gcc.gnu.org>; Richard Biener <rguenther@suse.de>
>> Subject: Re: pr103523: Check for PLUS/MINUS support
>>
>> Joel Hutton <Joel.Hutton@arm.com> writes:
>>> Hi all,
>>>
>>> This is to address pr103523.
>>>
>>> bootstrapped and regression tested on aarch64.
>>>
>>> Check for PLUS_EXPR/MINUS_EXPR support in vectorizable_induction.
>>> PR103523 is an ICE on valid code:
>>>
>>> void d(float *a, float b, int c) {
>>>      float e;
>>>      for (; c; c--, e += b)
>>>        a[c] = e;
>>> }
>>>
>>> This is due to not checking for PLUS_EXPR support, which is missing in
>>> VNx2sf mode. This causes an ICE at expand time. This patch adds a check
>>> for support in vectorizable_induction.
>>>
>>> gcc/ChangeLog:
>>>
>>>          PR tree-optimization/PR103523
>> The bugzilla hook expects: PR tree-optimization/103523
>>
>>>          * tree-vect-loop.c (vectorizable_induction): Check for
>>>      PLUS_EXPR/MINUS_EXPR support.
>> OK, thanks.
>>
>> Richard
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