From: Segher Boessenkool <segher@kernel.crashing.org>
To: Bill Schmidt <wschmidt@linux.ibm.com>
Cc: gcc-patches@gcc.gnu.org, dje.gcc@gmail.com
Subject: Re: [PATCH 2/8] rs6000: Don't #ifdef "short" built-in names
Date: Fri, 28 Jan 2022 14:32:52 -0600 [thread overview]
Message-ID: <20220128203252.GH614@gate.crashing.org> (raw)
In-Reply-To: <68d0e1d61ff7834c90b598a17266cb5fbb60a77c.1643390744.git.wschmidt@linux.ibm.com>
On Fri, Jan 28, 2022 at 11:50:20AM -0600, Bill Schmidt wrote:
> It was recently pointed out that we get anomalous behavior when using
> __attribute__((target)) to select a CPU. As an example, when building for
> -mcpu=power8 but using __attribute__((target("mcpu=power10")), it is legal
> to call __builtin_vec_mod, but not vec_mod, even though these are
> equivalent. This is because the equivalence is established with a #define
> that is guarded by #ifdef _ARCH_PWR10.
Yeah that is bad.
> This goofy behavior occurs with both the old builtins support and the
> new. One of the goals of the new builtins support was to make sure all
> appropriate interfaces are available using __attribute__((target)), so I
> failed in this respect. This patch corrects the problem by removing the
> apply. For example, #ifdef __PPU__ is still appropriate.
"By removing the apply"... What does that mean?
Nice cleanup (and nice bugfix of course). Okay for trunk (with that
comment improved a bit perhaps). Thanks!
Segher
next prev parent reply other threads:[~2022-01-28 20:33 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-28 17:50 [PATCH 0/8] rs6000: Built-in function cleanups and bug fixes Bill Schmidt
2022-01-28 17:50 ` [PATCH 1/8] rs6000: More factoring of overload processing Bill Schmidt
2022-01-28 19:11 ` Segher Boessenkool
2022-01-28 21:19 ` Bill Schmidt
2022-01-28 23:09 ` Segher Boessenkool
2022-02-01 14:49 ` [PATCH v2 " Bill Schmidt
2022-02-01 21:48 ` Segher Boessenkool
2022-02-02 18:46 ` Bill Schmidt
2022-02-03 14:44 ` [PATCH v3 " Bill Schmidt
2022-02-04 1:24 ` Segher Boessenkool
2022-01-28 17:50 ` [PATCH 2/8] rs6000: Don't #ifdef "short" built-in names Bill Schmidt
2022-01-28 20:32 ` Segher Boessenkool [this message]
2022-01-28 21:21 ` Bill Schmidt
2022-01-28 17:50 ` [PATCH 3/8] rs6000: Convert <x> built-in constraints to <x,y> form Bill Schmidt
2022-01-28 23:24 ` [PATCH 3/8] rs6000: Convert <x> built-in constraints to <x, y> form Segher Boessenkool
2022-01-31 17:21 ` [PATCH 3/8] rs6000: Convert <x> built-in constraints to <x,y> form Bill Schmidt
2022-01-31 17:28 ` [PATCH 3/8] rs6000: Convert <x> built-in constraints to <x, y> form Segher Boessenkool
2022-01-31 17:31 ` [PATCH 3/8] rs6000: Convert <x> built-in constraints to <x,y> form Bill Schmidt
2022-02-01 14:53 ` [PATCH v2 3/8] rs6000: Unify error messages for built-in constant restrictions Bill Schmidt
2022-02-01 22:16 ` Segher Boessenkool
2022-01-28 17:50 ` [PATCH 4/8] rs6000: Consolidate target built-ins code Bill Schmidt
2022-01-31 21:32 ` Segher Boessenkool
2022-01-31 22:01 ` Bill Schmidt
2022-01-31 22:33 ` Segher Boessenkool
2022-01-28 17:50 ` [PATCH 5/8] rs6000: Fix LE code gen for vec_cnt[lt]z_lsbb [PR95082] Bill Schmidt
2022-02-01 23:01 ` Segher Boessenkool
2022-01-28 17:50 ` [PATCH 6/8] rs6000: Remove -m[no-]fold-gimple flag [PR103686] Bill Schmidt
2022-02-02 23:21 ` Segher Boessenkool
2022-01-28 17:50 ` [PATCH 7/8] rs6000: vec_neg built-ins wrongly require POWER8 Bill Schmidt
2022-02-07 15:48 ` Bill Schmidt
2022-03-30 18:04 ` Segher Boessenkool
2022-01-28 17:50 ` [PATCH 8/8] rs6000: Fix some missing built-in attributes [PR104004] Bill Schmidt
2022-03-15 13:18 ` rs6000 patch ping: " Jakub Jelinek
2022-03-30 12:28 ` rs6000 patch ping^2: " Jakub Jelinek
2022-03-30 23:07 ` rs6000 patch ping: " Segher Boessenkool
2022-03-31 22:17 ` Segher Boessenkool
2022-03-30 17:41 ` will schmidt
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