From: Jeff Law <jlaw@ventanamicro.com>
To: Palmer Dabbelt <palmer@dabbelt.com>
Cc: manolis.tsamis@vrull.eu, Vineet Gupta <vineetg@rivosinc.com>,
gcc-patches@gcc.gnu.org, Kito Cheng <kito.cheng@gmail.com>,
philipp.tomsich@vrull.eu
Subject: Re: [PATCH] Enable shrink wrapping for the RISC-V target.
Date: Thu, 3 Nov 2022 16:23:28 -0600 [thread overview]
Message-ID: <bf2f5779-15cc-a886-4553-af44108edf05@ventanamicro.com> (raw)
In-Reply-To: <mhng-f36dfb20-48b9-4390-8c1b-8f25b0faa1da@palmer-ri-x1c9a>
On 11/2/22 18:26, Palmer Dabbelt wrote:
>
>>> I also tried to remove that restriction but it looks like it can't
>>> work because we can't create
>>> pseudo-registers during shrink wrapping and shrink wrapping can't
>>> work either.
>>>
>>> I believe this means that shrink wrapping cannot interfere with a long
>>> stack frame
>>> so there is nothing to test against in this case?
>>
>> It'd be marginally better to have such a test case to ensure we don't
>> shrink wrap it -- that would ensure that someone doesn't accidentally
>> introduce shrink wrapping with large offsets. Just a bit of future
>> proofing.
>
> If there's passing test cases that fail with that check removed then
> it's probably good enough, though I think in this case just having a
> comment there saying why the short-stack check is necessary should be
> fine.
I can live with this.
jeff
next prev parent reply other threads:[~2022-11-03 22:23 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-06 10:39 mtsamis
2022-10-02 20:32 ` Palmer Dabbelt
2022-10-18 15:18 ` Manolis Tsamis
2022-10-18 15:57 ` Jeff Law
2022-10-18 17:35 ` Palmer Dabbelt
2022-10-19 17:15 ` Jeff Law
2022-10-20 7:42 ` Manolis Tsamis
2022-11-02 14:12 ` Manolis Tsamis
2022-11-02 15:02 ` Jeff Law
2022-10-20 7:35 ` Manolis Tsamis
2022-11-02 13:54 ` Manolis Tsamis
2022-11-02 15:06 ` Jeff Law
2022-11-03 0:26 ` Palmer Dabbelt
2022-11-03 22:23 ` Jeff Law [this message]
2022-11-07 22:07 ` Palmer Dabbelt
2022-11-13 1:32 ` Jeff Law
2022-11-16 10:26 ` Manolis Tsamis
2022-11-17 2:09 ` Jeff Law
2022-11-17 10:54 ` Manolis Tsamis
2022-11-17 11:59 ` Philipp Tomsich
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