[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" <gcc-bugzilla at gcc dot gnu dot org>]

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))