[Bug c++/42911] New: another compiler hang for -g -O2

[Bug c++/42911] New: another compiler hang for -g -O2

[dcb314 at hotmail dot com]

I just tried to compile the package kile-2.1beta2-3.19 with the GNU
C++ compiler version 4.5 snapshot 20100128 and the compiler seemed
to take a long time over the compilation.

It ran for over 20 minutes on an idle 2.7 GHz AMD Athlon without
finishing.

Preprocessed source code attached. Flags -g -O2 required.

I am not sure if this bug report is the same or different to #41371.


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           Summary: another compiler hang for -g -O2
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dcb314 at hotmail dot com
  GCC host triplet: x86_64-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42911

[Bug c++/42911] another compiler hang for -g -O2

[dcb314 at hotmail dot com]

------- Comment #1 from dcb314 at hotmail dot com  2010-01-31 10:56 -------
Created an attachment (id=19762)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19762&action=view)
gzipped C++ source code


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42911

[Bug c++/42911] another compiler hang for -g -O2

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2010-01-31 13:51 -------
I think it is related.


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |41371
            Summary|another compiler hang for -g|another compiler hang for -g
                   |-O2                         |-O2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42911

[Bug c++/42911] [4.5 Regression] another compiler hang for -g -O2

[pinskia at gcc dot gnu dot org]

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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |compile-time-hog
            Summary|another compiler hang for -g|[4.5 Regression] another
                   |-O2                         |compiler hang for -g -O2
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42911

[Bug c++/42911] [4.5 Regression] another compiler hang for -g -O2

[rguenth at gcc dot gnu dot org]

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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42911

[Bug c++/42911] [4.5 Regression] huge compile time with -g -O2

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2010-02-11 23:44 -------
It does not hang for me but it is definitely much slower with -g:
 variable tracking     :  57.85 (77%) usr   0.69 (39%) sys  58.60 (77%) wall  
22951 kB ( 6%) ggc

Note this with checking enabled.  So I don't know if the numbers will be that
bad for the release.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aoliva at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-02-11 23:44:23
               date|                            |
            Summary|[4.5 Regression] another    |[4.5 Regression] huge
                   |compiler hang for -g -O2    |compile time with -g -O2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42911

[Bug c++/42911] [4.5 Regression] huge compile time with -g -O2

[jakub at gcc dot gnu dot org]

------- Comment #4 from jakub at gcc dot gnu dot org  2010-02-15 13:52 -------
This is something http://gcc.gnu.org/ml/gcc-patches/2010-01/msg01015.html
patch with a default limit like 50000000 cures.  The function is simple too
huge after all the inlining for var-tracking purposes.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42911

[Bug debug/42911] [4.5 Regression] huge compile time with -g -O2

[jason at gcc dot gnu dot org]

------- Comment #5 from jason at gcc dot gnu dot org  2010-02-24 23:14 -------
Changing component to debug.


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jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |debug


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42911

[Bug debug/42911] [4.5 Regression] huge compile time with -g -O2

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2010-03-15 15:20 -------
Fixed.  Or rather, duplicate of 41371.

*** This bug has been marked as a duplicate of 41371 ***


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42911