From: Alexandre Oliva <oliva@adacore.com>
To: Richard Biener <rguenther@suse.de>
Cc: gcc-patches@gcc.gnu.org, ebotcazou@adacore.com, joseph@codesourcery.com
Subject: Re: introduce -fcallgraph-info option
Date: Wed, 25 Dec 2019 10:05:00 -0000 [thread overview]
Message-ID: <ory2v0222s.fsf@livre.home> (raw)
In-Reply-To: <ortv7fpazz.fsf@livre.home> (Alexandre Oliva's message of "Thu, 07 Nov 2019 19:39:12 -0300")
On Nov 7, 2019, Alexandre Oliva <oliva@adacore.com> wrote:
> compiling a single source idir/ibase.iext:
> -o odir/obase.oext specified: default -dumpdir odir -dumpbase obase.iext
> -o obase.oext specified: default -dumpbase obase.iext
> -o ibase.oext implied: default -dumpbase ibase.iext
> compiling multiple sources named as ibase.iext for linking:
> -dumpbase [ddir/]dbase specified: make it -dumpbase [ddir/]dbase-ibase.iext
> -o odir/output specified: default -dumpdir odir -dumpbase output-ibase.iext
> -o output specified: default -dumpbase output-ibase.iext
> -o a.out implied: default -dumpbase a.out-ibase.iext
> LTO recompiling:
> same as above, with each ibase.iext set to ltrans#
> The resulting behavior (aux_base_name, dump_base_name)
> compiling and linking with -o: (outdir/runme-ibase, outdir/runme-ibase.iext)
> ex $CC -o outdir/runme srcdir/foo.c srcdir/x/bar.c
> -> /tmp/temp().o outdir/runme-foo.su outdir/runme-foo.c.#t.original
> + /tmp/temp().o outdir/runme-bar.su outdir/runme-bar.c.#t.original
> + outdir/runme
I've implemented this so that, even with a single source file, the
executable name is prepended to the aux outputs in the case above. This
causes thousands of testsuite failures, as dump files generated by tests
that undergo linking were no longer found: since we compile
foo.ext -o foo.exe, dumps end up named foo-foo.ext.* rather than
foo.ext.*.
Although it doesn't seem too hard to fix the testsuite logic, I'm a
little hesitant at imposing this change onto such a common case that
might hit other tools that use gcc underneath. I'm considering other
alternatives, such as:
1. do not take the executable name into account when naming aux outputs
of compilations, just like we do today. this makes aux outputs for the
same input file overwrite each other.
2. do not take the executable name into account when there is a single
input file. same problem as above
3. do not take the executable name into account when it shares the
basename with an input file; combine executable basename with input name
otherwise. this makes gcc -o foo[.exe] -g -gsplit-dwarf foo.c output
foo.dwo rather than foo-foo.dwo, which is nice, but then dwo files
compiled for use with foo won't all match foo-*.dwo; it seems more
desirable that they all do
4. same as above, but only when there is only one input file, so that
after adding bar.c to the command above, you'd get foo-foo.dwo and
foo-bar.dwo
5. when there is a single input file, take the basename of the
executable alone, rather than combine it with the basename of the input
file, to name aux outputs, but still use the extension of the input
file, so gcc -o foo foo.c will generate foo.dwo and foo.c.* dumps
I dislike the asymmetry in 3., but I would be happy to implement any
other, including the testsuite change to accommodate foo-foo.* dumps.
Any preferences? Me, I'm leaning towards 5.
--
Alexandre Oliva, freedom fighter he/him https://FSFLA.org/blogs/lxo
Free Software Evangelist Stallman was right, but he's left :(
GNU Toolchain Engineer FSMatrix: It was he who freed the first of us
FSF & FSFLA board member The Savior shall return (true);
next prev parent reply other threads:[~2019-12-25 9:21 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-26 5:30 Alexandre Oliva
2019-10-26 8:12 ` Richard Biener
2019-10-26 11:21 ` Alexandre Oliva
2019-10-27 9:08 ` Alexandre Oliva
2019-10-28 8:38 ` Richard Biener
2019-10-30 10:12 ` Alexandre Oliva
2019-10-30 11:28 ` Richard Biener
2019-11-02 19:31 ` Alexandre Oliva
2019-11-04 8:28 ` Richard Biener
2019-11-06 10:53 ` Alexandre Oliva
2019-11-20 4:35 ` Alexandre Oliva
2019-11-20 9:16 ` Richard Biener
2019-11-06 15:38 ` Alexandre Oliva
2019-11-07 7:49 ` Richard Biener
2019-11-07 10:50 ` Alexandre Oliva
2019-11-07 11:48 ` Richard Biener
2019-11-07 12:30 ` Alexandre Oliva
2019-11-07 14:02 ` Richard Biener
2019-11-07 22:39 ` Alexandre Oliva
2019-11-08 8:28 ` Richard Biener
2019-11-08 23:12 ` Eric Gallager
2019-11-15 1:34 ` Alexandre Oliva
2019-11-15 1:01 ` Alexandre Oliva
2019-11-15 7:30 ` Alexandre Oliva
2019-11-15 8:08 ` Richard Biener
2019-11-15 22:50 ` Alexandre Oliva
2019-12-03 22:44 ` Alexandre Oliva
2019-12-09 9:41 ` Richard Biener
2019-12-12 1:14 ` Alexandre Oliva
2019-12-25 10:05 ` Alexandre Oliva [this message]
2019-12-26 19:00 ` drop -aux{dir,base}, revamp -dump{dir,base} (was: Re: introduce -fcallgraph-info option) Alexandre Oliva
2020-01-09 13:33 ` Richard Biener
2020-01-09 19:09 ` drop -aux{dir,base}, revamp -dump{dir,base} Alexandre Oliva
2020-01-16 11:06 ` Alexandre Oliva
2020-01-16 11:15 ` Alexandre Oliva
2020-01-17 2:14 ` Joseph Myers
2020-01-20 10:38 ` Richard Biener
2020-01-22 1:25 ` Alexandre Oliva
2020-01-22 8:15 ` Richard Biener
2020-01-23 20:06 ` Alexandre Oliva
2020-01-24 1:50 ` Alexandre Oliva
2020-05-19 8:51 ` Alexandre Oliva
2020-05-19 8:59 ` Alexandre Oliva
2020-05-19 9:29 ` Richard Biener
2020-05-19 8:59 ` Alexandre Oliva
2020-05-19 9:30 ` Richard Biener
2020-05-19 9:00 ` Alexandre Oliva
2020-05-19 9:04 ` Richard Biener
2020-05-22 0:32 ` Alexandre Oliva
2020-05-22 6:05 ` Richard Biener
2020-05-26 7:08 ` Alexandre Oliva
2020-05-26 8:52 ` Richard Biener
2020-05-26 9:02 ` Martin Liška
2020-05-26 10:00 ` Alexandre Oliva
2020-05-26 12:14 ` Alexandre Oliva
2020-05-26 13:52 ` Alexandre Oliva
2020-05-26 13:56 ` Richard Biener
2020-05-27 22:05 ` Alexandre Oliva
2020-05-27 23:01 ` Jeff Law
2020-06-02 11:52 ` Alexandre Oliva
2020-06-02 12:02 ` Richard Biener
2020-05-27 1:04 ` Broken build (was: Re: drop -aux{dir,base}, revamp -dump{dir,base}) Hans-Peter Nilsson
2020-05-27 14:30 ` Broken build Alexandre Oliva
2020-05-27 15:04 ` Hans-Peter Nilsson
2020-05-28 0:53 ` Alexandre Oliva
2020-05-28 0:39 ` Anthony Green
2020-06-02 11:29 ` Alexandre Oliva
2020-06-02 14:07 ` Hans-Peter Nilsson
2020-05-27 9:45 ` drop -aux{dir,base}, revamp -dump{dir,base} Andreas Schwab
2020-05-27 10:28 ` Andreas Schwab
2020-05-27 14:41 ` Alexandre Oliva
2020-05-27 14:59 ` Andreas Schwab
2020-06-09 12:29 ` Thomas Schwinge
2020-06-09 12:42 ` BRIG FE testsuite: Fix all dump-scans (Was: Re: drop -aux{dir, base}, revamp -dump{dir, base}) Martin Jambor
2020-06-09 18:31 ` BRIG FE testsuite: Fix all dump-scans (Was: Re: drop -aux{dir,base}, revamp -dump{dir,base}) Mike Stump
2020-06-11 14:28 ` BRIG FE testsuite: Fix all dump-scans (Was: Re: drop -aux{dir, base}, revamp -dump{dir, base}) Martin Jambor
2020-06-12 20:52 ` BRIG FE testsuite: Fix all dump-scans (Was: Re: drop -aux{dir,base}, revamp -dump{dir,base}) Mike Stump
2020-06-10 21:50 ` BRIG FE testsuite: Fix all dump-scans Alexandre Oliva
2020-06-23 9:44 ` drop -aux{dir,base}, revamp -dump{dir,base} Alexandre Oliva
2020-06-23 11:30 ` Martin Jambor
2020-06-09 13:08 ` Thomas Schwinge
2020-06-10 22:24 ` Alexandre Oliva
2020-06-17 10:50 ` Tobias Burnus
2020-06-18 2:58 ` Alexandre Oliva
2020-06-18 6:10 ` Alexandre Oliva
2020-06-18 9:41 ` Tobias Burnus
2020-06-18 10:39 ` Alexandre Oliva
2020-06-18 12:06 ` Tobias Burnus
2020-06-30 16:13 ` Thomas Schwinge
2020-07-14 5:46 ` Alexandre Oliva
2020-07-24 6:08 ` Thomas Schwinge
2020-07-24 17:54 ` Alexandre Oliva
2020-07-14 5:49 ` Alexandre Oliva
2020-06-19 9:53 ` Alexandre Oliva
2020-06-19 16:09 ` Tobias Burnus
2020-06-22 6:08 ` Alexandre Oliva
2020-06-22 7:07 ` Tobias Burnus
2020-06-22 14:32 ` Alexandre Oliva
2020-06-23 8:17 ` Richard Biener
2020-06-30 16:35 ` Thomas Schwinge
2020-07-24 12:06 ` Thomas Schwinge
2020-06-30 18:52 ` Thomas Schwinge
2020-07-14 4:48 ` Alexandre Oliva
2020-07-24 6:01 ` Thomas Schwinge
2020-07-24 18:00 ` Alexandre Oliva
2023-11-24 12:46 ` testsuite: Add 'only_for_offload_target' wrapper for 'scan-offload-tree-dump' etc. (was: drop -aux{dir,base}, revamp -dump{dir,base}) Thomas Schwinge
2020-06-23 9:50 ` drop -aux{dir,base}, revamp -dump{dir,base} Alexandre Oliva
2020-06-30 16:07 ` Thomas Schwinge
2020-07-23 21:12 ` [PR95720] protect gluefile and wrap_flags with -Wl too (was: Re: drop -aux{dir,base}, revamp -dump{dir,base}) Alexandre Oliva
2020-07-24 6:48 ` Richard Biener
2020-05-26 8:09 ` [wwwdocs] Re: drop -aux{dir,base}, revamp -dump{dir,base} Alexandre Oliva
2019-10-28 23:56 ` introduce -fcallgraph-info option Joseph Myers
2019-10-30 9:22 ` Alexandre Oliva
2019-10-30 9:43 ` Alexandre Oliva
2019-10-30 18:17 ` Joseph Myers
2019-11-06 21:27 ` Thomas Schwinge
2019-11-07 11:23 ` Alexandre Oliva
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