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* [Bug c/107127] New: [Regression 11/12] Long compile times on code with C complex
@ 2022-10-03  2:03 inform at tiker dot net
  2022-10-03  9:31 ` [Bug c/107127] [11/12/13 Regression] Long compile times on code with C complex since r11-3299-gcba079f354a55363 marxin at gcc dot gnu.org
                   ` (14 more replies)
  0 siblings, 15 replies; 16+ messages in thread
From: inform at tiker dot net @ 2022-10-03  2:03 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107127

            Bug ID: 107127
           Summary: [Regression 11/12] Long compile times on code with C
                    complex
           Product: gcc
           Version: 12.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: inform at tiker dot net
  Target Milestone: ---

A generated code using C-style complex arithmetic that compiled nearly
instantaneously with gcc 10.4 takes >=30s with gcc 11.3.0 and 12.2.0.

How to reproduce:

git clone https://gist.github.com/inducer/802e227e86e3ff4fd95aa0fefae462fe.git 
cd 802e227e86e3ff4fd95aa0fefae462fe
git checkout 9eb600e
$ time gcc-10 -c post-110.c
gcc-10 -c post-110.c  0,05s user 0,02s system 45% cpu 0,155 total
$ time gcc-11 -c post-110.c
^C
gcc-11 -c post-110.c  0,00s user 0,00s system 0% cpu 23,757 total
$ time gcc-12 -c post-110.c
^C
gcc-12 -c post-110.c  0,00s user 0,00s system 0% cpu 31,574 total

This does not seem to be very sensitive to headers, so I'm not including
preprocessed source to start. Happy to supply it if needed.

Target: x86_64-linux-gnu
Precise versions:

gcc version 10.4.0 (Debian 10.4.0-5)
gcc version 11.3.0 (Debian 11.3.0-5)
gcc version 12.2.0 (Debian 12.2.0-3)

x-ref: https://github.com/inducer/loopy/issues/686

^ permalink raw reply	[flat|nested] 16+ messages in thread
end of thread, other threads:[~2023-05-03  9:29 UTC | newest]

Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-10-03  2:03 [Bug c/107127] New: [Regression 11/12] Long compile times on code with C complex inform at tiker dot net
2022-10-03  9:31 ` [Bug c/107127] [11/12/13 Regression] Long compile times on code with C complex since r11-3299-gcba079f354a55363 marxin at gcc dot gnu.org
2022-10-03  9:53 ` marxin at gcc dot gnu.org
2022-10-03 19:49 ` pinskia at gcc dot gnu.org
2022-10-03 19:52 ` pinskia at gcc dot gnu.org
2022-10-06  9:59 ` rguenth at gcc dot gnu.org
2022-11-22 11:10 ` jakub at gcc dot gnu.org
2022-11-23 18:10 ` cvs-commit at gcc dot gnu.org
2022-11-23 18:11 ` [Bug c/107127] [11/12 " jakub at gcc dot gnu.org
2022-11-24  9:34 ` cvs-commit at gcc dot gnu.org
2023-02-10 17:43 ` cvs-commit at gcc dot gnu.org
2023-02-10 17:44 ` cvs-commit at gcc dot gnu.org
2023-02-10 17:57 ` [Bug c/107127] [11 " jakub at gcc dot gnu.org
2023-05-02 20:12 ` cvs-commit at gcc dot gnu.org
2023-05-02 20:12 ` cvs-commit at gcc dot gnu.org
2023-05-03  9:29 ` jakub at gcc dot gnu.org

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