[Bug rtl-optimization/46571] New: bootsrap comparison failure in fortran/trans-openmp.c

[Bug rtl-optimization/46571] New: bootsrap comparison failure in fortran/trans-openmp.c

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46571

           Summary: bootsrap comparison failure in fortran/trans-openmp.c
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rth@gcc.gnu.org


Stage2/3 differ on this file on ia64-linux.  This is a real
code generation difference observable with/without -g.

Command line:
  ./xgcc -B./ -O2 -g z.i

[Bug rtl-optimization/46571] bootsrap comparison failure in fortran/trans-openmp.c

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46571

Richard Henderson <rth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2010.11.19 22:11:13
         AssignedTo|unassigned at gcc dot       |rth at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Henderson <rth at gcc dot gnu.org> 2010-11-19 22:11:13 UTC ---
Created attachment 22463
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22463
Minimized test case

[Bug rtl-optimization/46571] bootsrap comparison failure in fortran/trans-openmp.c

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46571

Richard Henderson <rth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |ia64-linux
           Priority|P3                          |P2
   Target Milestone|---                         |4.6.0

--- Comment #2 from Richard Henderson <rth at gcc dot gnu.org> 2010-11-19 22:15:40 UTC ---
The first real code generation difference appears during the
173r.cprop3 pass, where the important difference is:

-GLOBAL COPY-PROP: Replacing reg 424 in insn 90 with reg 427

the replacement does not happen with -g.  Now to figure out why...

[Bug rtl-optimization/46571] [4.6 Regression] bootsrap comparison failure in fortran/trans-openmp.c

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46571

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build
           Priority|P2                          |P1
            Summary|bootsrap comparison failure |[4.6 Regression] bootsrap
                   |in fortran/trans-openmp.c   |comparison failure in
                   |                            |fortran/trans-openmp.c

[Bug rtl-optimization/46571] [4.6 Regression] bootstrap comparison failure in fortran/trans-openmp.c

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46571

--- Comment #3 from Richard Henderson <rth at gcc dot gnu.org> 2010-11-21 17:19:40 UTC ---
Author: rth
Date: Sun Nov 21 17:19:37 2010
New Revision: 167007

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=167007
Log:
PR rtl-optimization/46571
    * gcse.c (hash_scan_set): Use next_nonnote_nondebug_insn.
    (compute_hash_table_work): Use NONDEBUG_INSN_P.

Added:
    trunk/gcc/testsuite/gcc.dg/pr46571.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gcse.c

[Bug rtl-optimization/46571] [4.6 Regression] bootstrap comparison failure in fortran/trans-openmp.c

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46571

--- Comment #4 from Richard Henderson <rth at gcc dot gnu.org> 2010-11-21 17:27:26 UTC ---
Author: rth
Date: Sun Nov 21 17:27:23 2010
New Revision: 167008

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=167008
Log:
PR rtl-optimization/46571
    * gcse.c (hash_scan_set): Use next_nonnote_nondebug_insn.
    (compute_hash_table_work): Use NONDEBUG_INSN_P.

Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/gcse.c

[Bug rtl-optimization/46571] [4.6 Regression] bootstrap comparison failure in fortran/trans-openmp.c

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46571

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
                 CC|                            |jakub at gcc dot gnu.org
         Resolution|                            |FIXED

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-22 10:46:00 UTC ---
Fixed.

[Bug rtl-optimization/46571] [4.6 Regression] bootstrap comparison failure in fortran/trans-openmp.c

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46571

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-01-26 00:16:38 UTC ---
*** Bug 46569 has been marked as a duplicate of this bug. ***