From: David Malcolm <dmalcolm@redhat.com>
To: Jakub Jelinek <jakub@redhat.com>
Cc: Andrew MacLeod <amacleod@redhat.com>, gcc-patches@gcc.gnu.org
Subject: Re: [PATCH 0/6] Conversion of gimple types to C++ inheritance (v3)
Date: Fri, 01 Nov 2013 22:58:00 -0000 [thread overview]
Message-ID: <1383346704.5282.44.camel@surprise> (raw)
In-Reply-To: <20131101215709.GG27813@tucnak.zalov.cz>
On Fri, 2013-11-01 at 22:57 +0100, Jakub Jelinek wrote:
> On Fri, Nov 01, 2013 at 05:47:14PM -0400, Andrew MacLeod wrote:
> > On 11/01/2013 05:41 PM, Jakub Jelinek wrote:
> > >On Fri, Nov 01, 2013 at 05:36:34PM -0400, Andrew MacLeod wrote:
> > >> static inline void
> > >>! gimple_call_set_lhs (gimple gs, tree lhs)
> > >> {
> > >>- GIMPLE_CHECK (gs, GIMPLE_CALL);
>
> The checking you are removing here.
>
> > What checking? There ought to be no checking at all in this
> > example... gimple_build_call_vec returns a gimple_call, and
> > gimple_call_set_lhs() doesn't have to check anything because it
> > only accepts gimple_call's.. so there is no checking other than the
> > usual "does my parameter match" that the compiler has to do...
>
> and want to replace it by checking of the types at compile time.
> The problem is that it uglifies the source too much, and, when you
> actually don't have a gimple_call but supposedly a base class of it,
> I expect you'd do as_a which is not only further uglification, but has
> runtime cost also for --enable-checking=release.
I can have a look next week at every call to gimple_call_set_lhs in the
tree, and see to what extent we know at compile-time that the initial
arg is indeed a call (of the ones I quickly grepped just now, most are
from gimple_build_call and friends, but one was from a gimple_copy).
FWIW I did some performance testing of the is_a/as_a code in the earlier
version of the patch, and it didn't have a noticable runtime cost
compared to the GIMPLE_CHECK in the existing code:
Size of compiler executable:
http://gcc.gnu.org/ml/gcc-patches/2013-08/msg01920.html
Compile times:
http://gcc.gnu.org/ml/gcc-patches/2013-09/msg00171.html
Dave
next prev parent reply other threads:[~2013-11-01 22:58 UTC|newest]
Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-31 5:45 RFC: gimple.[ch] break apart Andrew MacLeod
2013-10-31 6:15 ` Jeff Law
2013-10-31 16:41 ` [PATCH 0/6] Conversion of gimple types to C++ inheritance (v3) David Malcolm
2013-10-31 16:27 ` [PATCH 4/6] Implement is_a_helper <>::test specializations for various gimple types David Malcolm
2013-11-14 9:41 ` Jeff Law
2013-11-18 19:51 ` David Malcolm
2013-11-18 20:10 ` Andrew MacLeod
2013-11-18 20:15 ` Jeff Law
2013-10-31 16:27 ` [PATCH 1/6] Convert gimple types from a union to C++ inheritance David Malcolm
2013-11-14 23:00 ` Jeff Law
2013-11-19 0:22 ` David Malcolm
2013-11-19 8:49 ` Jeff Law
2013-10-31 16:27 ` [PATCH 2/6] Hand-written port of various accessors within gimple.h David Malcolm
2013-11-14 9:53 ` Jeff Law
2013-10-31 16:31 ` [PATCH 3/6] Automated part of conversion of gimple types to use C++ inheritance David Malcolm
2013-11-14 9:43 ` Jeff Law
2013-11-18 22:17 ` [PATCH] Updated automated patch (was Re: [PATCH 3/6] Automated part of conversion of gimple types to use C++ inheritance) David Malcolm
2013-11-19 8:49 ` Jeff Law
2013-11-19 16:36 ` David Malcolm
2013-11-22 0:27 ` Jakub Jelinek
2013-11-22 0:35 ` Jeff Law
2013-11-22 1:51 ` Jakub Jelinek
2013-11-22 2:52 ` Andrew MacLeod
2013-11-22 3:48 ` David Malcolm
2013-11-25 18:09 ` [PATCH] Fix checking of gimple types David Malcolm
2013-11-25 18:42 ` Michael Matz
2013-11-25 22:18 ` Jeff Law
2013-11-27 8:54 ` David Malcolm
2014-07-23 13:16 ` Thomas Schwinge
2014-07-24 1:50 ` David Malcolm
2014-07-29 8:11 ` Thomas Schwinge
2013-10-31 16:46 ` [PATCH 6/6] Update gdb hooks to reflect changes to " David Malcolm
2013-11-14 9:10 ` Jeff Law
2013-10-31 16:49 ` [PATCH 5/6] Port various places from union access to subclass access David Malcolm
2013-11-14 9:23 ` Jeff Law
2013-11-19 0:52 ` David Malcolm
2013-10-31 18:43 ` [PATCH 0/6] Conversion of gimple types to C++ inheritance (v3) Basile Starynkevitch
2013-11-01 21:36 ` Andrew MacLeod
2013-11-01 21:41 ` Jakub Jelinek
2013-11-01 21:47 ` Andrew MacLeod
2013-11-01 21:57 ` Jakub Jelinek
2013-11-01 22:58 ` David Malcolm [this message]
2013-11-04 13:23 ` Andrew MacLeod
2013-11-04 21:52 ` David Malcolm
2013-11-04 22:09 ` David Malcolm
2013-11-04 22:31 ` Andrew MacLeod
2013-11-05 21:27 ` Jeff Law
2013-11-04 22:43 ` Andrew MacLeod
2013-11-04 22:28 ` Jakub Jelinek
2013-11-04 22:49 ` Andrew MacLeod
2013-11-05 21:09 ` Jeff Law
2013-11-05 11:53 ` Richard Biener
2013-11-05 12:33 ` David Malcolm
2013-11-05 12:52 ` Richard Biener
2013-11-04 14:00 ` Andrew MacLeod
2013-11-04 14:01 ` Jakub Jelinek
2013-11-04 14:15 ` Andrew MacLeod
2013-11-04 18:23 ` Jeff Law
2013-11-01 22:43 ` David Malcolm
2013-11-01 23:43 ` Trevor Saunders
2013-11-04 13:15 ` Andrew MacLeod
2013-11-05 17:23 ` [PATCH] Add gimple subclasses for every gimple code (was Re: [PATCH 0/6] Conversion of gimple types to C++ inheritance (v3)) David Malcolm
2013-11-06 16:53 ` Michael Matz
2013-11-07 6:19 ` David Malcolm
2013-11-07 7:08 ` Jeff Law
2013-11-08 19:23 ` David Malcolm
2013-11-14 8:38 ` Jeff Law
2013-11-14 15:06 ` Michael Matz
2013-11-14 18:32 ` David Malcolm
2013-11-15 2:49 ` Jeff Law
2013-11-07 14:57 ` Michael Matz
2013-11-08 0:07 ` Alec Teal
2013-11-08 14:31 ` Michael Matz
2013-11-05 18:22 ` [PATCH 0/6] Conversion of gimple types to C++ inheritance (v3) Andrew MacLeod
2013-11-05 21:33 ` Jeff Law
2013-11-05 22:01 ` David Malcolm
2013-11-05 22:17 ` Jeff Law
2013-11-06 1:14 ` Ian Lance Taylor
2013-11-06 20:49 ` Jeff Law
2013-11-06 20:57 ` Trevor Saunders
2013-11-05 22:24 ` Andrew MacLeod
2013-11-05 22:12 ` Andrew MacLeod
2013-11-06 9:37 ` Richard Biener
2013-11-06 11:20 ` Bernd Schmidt
2013-11-06 11:43 ` Richard Biener
2013-11-06 11:53 ` Jakub Jelinek
2013-11-06 13:14 ` Richard Biener
2013-11-06 13:23 ` Jakub Jelinek
2013-11-06 16:42 ` David Malcolm
2013-11-06 16:55 ` Jakub Jelinek
2013-11-06 18:34 ` Tom Tromey
2013-11-06 19:15 ` Jeff Law
2013-11-06 20:05 ` Tom Tromey
2013-11-06 20:45 ` Jeff Law
2013-11-06 13:31 ` Joseph S. Myers
2013-11-06 21:25 ` Jeff Law
2013-11-06 21:09 ` Jeff Law
2013-11-06 12:42 ` Bernd Schmidt
2013-11-06 21:04 ` Jeff Law
2013-11-06 21:06 ` Andrew MacLeod
2013-11-06 21:52 ` Jeff Law
2013-11-07 10:29 ` Richard Biener
2013-11-07 14:01 ` Joseph S. Myers
2013-11-07 14:42 ` Richard Biener
2013-11-07 14:53 ` Andrew MacLeod
2013-11-10 12:35 ` Richard Sandiford
2013-11-10 15:27 ` Richard Biener
2013-11-06 11:56 ` Eric Botcazou
2013-11-06 20:51 ` Jeff Law
2013-11-06 21:26 ` Jeff Law
2013-11-14 8:40 ` Jeff Law
2013-11-05 16:58 ` [patch] Create gimple-expr..[ch] ... was Re: RFC: gimple.[ch] break apart Andrew MacLeod
2013-11-05 17:52 ` Jeff Law
2013-11-07 10:58 ` Basile Starynkevitch
2013-11-07 13:47 ` Andrew MacLeod
2013-11-07 18:13 ` Diego Novillo
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