[Bug tree-optimization/48186] New: ICE: SIGFPE (division by zero) in maybe_hot_frequency_p at predict.c:129 with --param hot-bb-frequency-fraction=0 on basic code

[Bug tree-optimization/48186] New: ICE: SIGFPE (division by zero) in maybe_hot_frequency_p at predict.c:129 with --param hot-bb-frequency-fraction=0 on basic code

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48186

           Summary: ICE: SIGFPE (division by zero) in
                    maybe_hot_frequency_p at predict.c:129 with --param
                    hot-bb-frequency-fraction=0 on basic code
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


----- testcase.c -----
void foo (void) { }
----------------------

Compiler output:
$ gcc -O --param hot-bb-frequency-fraction=0 testcase.c
testcase.c: In function 'foo':
testcase.c:1:6: internal compiler error: Floating point exception
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Program received signal SIGFPE, Arithmetic exception.
0x0000000000806f9c in maybe_hot_frequency_p (bb=Unhandled dwarf expression
opcode 0xf3
) at /mnt/svn/gcc-trunk/gcc/predict.c:129
129       if (freq < ENTRY_BLOCK_PTR->frequency / PARAM_VALUE
(HOT_BB_FREQUENCY_FRACTION))

[Bug tree-optimization/48186] ICE: SIGFPE (division by zero) in maybe_hot_frequency_p at predict.c:129 with --param hot-bb-frequency-fraction=0 on basic code

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48186

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-12-15
     Ever Confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-12-15 02:20:27 UTC ---
Confirmed.

[Bug tree-optimization/48186] ICE: SIGFPE (division by zero) in maybe_hot_frequency_p at predict.c:129 with --param hot-bb-frequency-fraction=0 on basic code

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48186

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |mpolacek at gcc dot gnu.org
         AssignedTo|unassigned at gcc dot       |mpolacek at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-04-04 14:51:20 UTC ---
I have a patch.

[Bug tree-optimization/48186] ICE: SIGFPE (division by zero) in maybe_hot_frequency_p at predict.c:129 with --param hot-bb-frequency-fraction=0 on basic code

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48186

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-04-04 15:49:00 UTC ---
Author: mpolacek
Date: Thu Apr  4 15:48:25 2013
New Revision: 197487

URL: http://gcc.gnu.org/viewcvs?rev=197487&root=gcc&view=rev
Log:
        PR tree-optimization/48186
        * predict.c (maybe_hot_frequency_p): Return false if
        HOT_BB_FREQUENCY_FRACTION is 0.
        (cgraph_maybe_hot_edge_p): Likewise.

        * gcc.dg/pr48186.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr48186.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/predict.c
    trunk/gcc/testsuite/ChangeLog

[Bug tree-optimization/48186] ICE: SIGFPE (division by zero) in maybe_hot_frequency_p at predict.c:129 with --param hot-bb-frequency-fraction=0 on basic code

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48186

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dominiq at lps dot ens.fr

--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2013-04-04 15:52:12 UTC ---
*** Bug 40119 has been marked as a duplicate of this bug. ***

[Bug tree-optimization/48186] ICE: SIGFPE (division by zero) in maybe_hot_frequency_p at predict.c:129 with --param hot-bb-frequency-fraction=0 on basic code

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48186

--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-04-04 15:53:25 UTC ---
Author: mpolacek
Date: Thu Apr  4 15:52:54 2013
New Revision: 197488

URL: http://gcc.gnu.org/viewcvs?rev=197488&root=gcc&view=rev
Log:
        PR tree-optimization/48186
        * predict.c (maybe_hot_frequency_p): Return false if
        HOT_BB_FREQUENCY_FRACTION is 0.
        (cgraph_maybe_hot_edge_p): Likewise.

        * gcc.dg/pr48186.c: New test.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr48186.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/predict.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog

[Bug tree-optimization/48186] ICE: SIGFPE (division by zero) in maybe_hot_frequency_p at predict.c:129 with --param hot-bb-frequency-fraction=0 on basic code

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48186

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-04-04 15:53:56 UTC ---
Fixed.