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Date: Tue, 07 Jun 2011 04:16:00 -0000
Message-ID: <BANLkTikF2wo01xwR1ofaYkJfgTk=3sKjEw@mail.gmail.com>
Subject: Re: [PATCH] Remove pow/powi expanders (PR46728 patch 6)
From: "H.J. Lu" <hjl.tools@gmail.com>
To: "William J. Schmidt" <wschmidt@linux.vnet.ibm.com>
Cc: gcc-patches@gcc.gnu.org
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On Tue, May 31, 2011 at 7:00 AM, William J. Schmidt
<wschmidt@linux.vnet.ibm.com> wrote:
> This patch removes the now-redundant support for pow and powi builtins
> in the expand phase. =A0My concerns about -O0 regressions were unfounded.
> There are code gen differences for the unlikely combination of -O0 and
> -ffast-math, but that's obviously nothing to be concerned about.
>
> Bootstrapped and regtested for powerpc64-linux with no regressions. =A0OK
> for trunk?
>
> 2011-05-31 =A0Bill Schmidt =A0<wschmidt@linux.vnet.ibm.com>
>
> =A0 =A0 =A0 =A0PR tree-optimization/46728
> =A0 =A0 =A0 =A0* builtins.c (powi_table): Remove.
> =A0 =A0 =A0 =A0(powi_lookup_cost): Remove.
> =A0 =A0 =A0 =A0(powi_cost): Remove.
> =A0 =A0 =A0 =A0(expand_powi_1): Remove.
> =A0 =A0 =A0 =A0(expand_powi): Remove.
> =A0 =A0 =A0 =A0(expand_builtin_pow_root): Remove.
> =A0 =A0 =A0 =A0(expand_builtin_pow): Remove.
> =A0 =A0 =A0 =A0(expand_builtin_powi): Eliminate handling of constant expo=
nent.
> =A0 =A0 =A0 =A0(expand_builtin): Use expand_builtin_mathfn_2 for BUILT_IN=
_POW.
>
>

This caused:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D49302


H.J.