From: Robin Dapp <rdapp@linux.vnet.ibm.com>
To: Christophe Lyon <christophe.lyon@linaro.org>
Cc: Richard Biener <richard.guenther@gmail.com>,
GCC Patches <gcc-patches@gcc.gnu.org>,
"Bin.Cheng" <amker.cheng@gmail.com>,
Andreas Krebbel <krebbel@linux.vnet.ibm.com>
Subject: Re: [PATCH 4/5 v3] Vect peeling cost model
Date: Wed, 31 May 2017 14:37:00 -0000 [thread overview]
Message-ID: <5cb31aad-d0f6-3b83-f531-18f8abe301c7@linux.vnet.ibm.com> (raw)
In-Reply-To: <CAKdteOau7xgv7SarGNjfK6OrWJxqdws-bgQDzv6ksJ1P_bJr_A@mail.gmail.com>
> Since this commit (r248678), I've noticed regressions on some arm targets.
> Executed from: gcc.dg/tree-ssa/tree-ssa.exp
> gcc.dg/tree-ssa/gen-vect-26.c scan-tree-dump-times vect "Alignment
> of access forced using peeling" 1
> gcc.dg/tree-ssa/gen-vect-26.c scan-tree-dump-times vect
> "Vectorizing an unaligned access" 0
> gcc.dg/tree-ssa/gen-vect-28.c scan-tree-dump-times vect "Alignment
> of access forced using peeling" 1
> gcc.dg/tree-ssa/gen-vect-28.c scan-tree-dump-times vect
> "Vectorizing an unaligned access" 0
>
> For instance with --target arm-linux-gnueabihf --with-cpu=cortex-a5
> --with-fpu=vfpv3-d16-fp16
> (using cortex-a9+neon makes the test pass).
I do not have access to an arm machine for testing but could these
regressions be "ok" as in we no longer perform peeling because costs for
not peeling <= costs for peeling and we still vectorize? (Just guessing)
Or are these real regressions that prevent vectorization? Does the
"vectorized 1 loops" check fail?
Regards
Robin
next prev parent reply other threads:[~2017-05-31 14:27 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-11 14:38 [RFC] S/390: Alignment peeling prolog generation Robin Dapp
2017-04-11 14:57 ` Bin.Cheng
2017-04-11 15:03 ` Robin Dapp
2017-04-11 15:07 ` Bin.Cheng
2017-04-11 16:25 ` Richard Biener
2017-04-12 7:51 ` Robin Dapp
2017-04-12 7:58 ` Richard Biener
2017-05-04 9:04 ` [PATCH 1/3] Vect peeling cost model Robin Dapp
2017-05-05 10:32 ` Richard Biener
2017-05-04 9:04 ` [RFC] S/390: Alignment peeling prolog generation Robin Dapp
2017-05-05 11:04 ` Richard Biener
2017-05-08 16:12 ` Robin Dapp
2017-05-09 10:38 ` Richard Biener
2017-05-11 11:17 ` Robin Dapp
2017-05-11 12:15 ` Richard Biener
2017-05-11 12:16 ` Richard Biener
2017-05-11 12:48 ` Richard Biener
2017-05-11 11:17 ` [PATCH 1/5] Vect peeling cost model Robin Dapp
2017-05-11 11:18 ` [PATCH 2/5] " Robin Dapp
2017-05-11 11:19 ` [PATCH 3/5] " Robin Dapp
2017-05-11 11:20 ` [PATCH 4/5] " Robin Dapp
2017-05-11 15:30 ` [PATCH 4/5 v2] " Robin Dapp
2017-05-12 9:36 ` Richard Biener
2017-05-23 15:58 ` [PATCH 2/5 v3] " Robin Dapp
2017-05-23 19:25 ` Richard Sandiford
2017-05-24 7:37 ` Robin Dapp
2017-05-24 7:53 ` Richard Sandiford
2017-05-23 15:58 ` [PATCH 1/5 " Robin Dapp
2017-05-23 15:58 ` [PATCH 0/5 " Robin Dapp
2017-05-24 7:51 ` Richard Biener
2017-05-24 11:57 ` Robin Dapp
2017-05-24 13:56 ` Richard Biener
2017-06-03 17:12 ` Andreas Schwab
2017-06-06 7:13 ` Robin Dapp
2017-06-06 17:26 ` Andreas Schwab
2017-06-07 10:50 ` Robin Dapp
2017-06-07 11:43 ` Andreas Schwab
2017-05-23 15:59 ` [PATCH 4/5 " Robin Dapp
2017-05-31 13:56 ` Christophe Lyon
2017-05-31 14:37 ` Robin Dapp [this message]
2017-05-31 14:49 ` Christophe Lyon
2017-05-23 15:59 ` [PATCH 5/5 " Robin Dapp
2017-05-23 16:02 ` [PATCH 3/5 " Robin Dapp
2017-05-11 11:59 ` [PATCH 5/5] " Robin Dapp
2017-05-08 16:13 ` [PATCH 3/4] " Robin Dapp
2017-05-09 10:41 ` Richard Biener
2017-05-08 16:27 ` [PATCH 4/4] " Robin Dapp
2017-05-09 10:55 ` Richard Biener
2017-05-04 9:07 ` [PATCH 2/3] " Robin Dapp
2017-05-05 10:37 ` Richard Biener
2017-05-04 9:14 ` [PATCH 3/3] " Robin Dapp
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