[Bug middle-end/81318] [8 regression] ICE in to_reg_br_prob_base, at profile-count.h:189

[daniel.black at au dot ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81318

Daniel Black <daniel.black at au dot ibm.com> changed:

           What    |Removed                     |Added
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                 CC|                            |daniel.black at au dot ibm.com

--- Comment #25 from Daniel Black <daniel.black at au dot ibm.com> ---
Also getting this on linux kernel 4.13 release on gcc master branch but not
gcc-7:

There are at least two locations that generate this backtrace.

gcc -O1 -c -o drivers/scsi/mpt3sas/.tmp_mpt3sas_scsih.o   ./mpt3sas_scsih.i

during GIMPLE pass: profile_estimate
drivers/scsi/mpt3sas/mpt3sas_scsih.c: In function ‘mpt3sas_scsih_issue_tm’:
drivers/scsi/mpt3sas/mpt3sas_scsih.c:9455:1: internal compiler error: in
to_reg_br_prob_base, at profile-count.h:189
 module_exit(_mpt3sas_exit);
 ^~~~~~
0x1085d55f profile_probability::to_reg_br_prob_base() const
        ../../gcc/profile-count.h:189
0x1085d55f estimate_bb_frequencies(bool)
        ../../gcc/predict.c:3570
0x10861123 tree_estimate_probability(bool)
        ../../gcc/predict.c:2827
0x1086165f execute
        ../../gcc/predict.c:3712
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

Simplest ICE generation is -O1. -O0 gets to code errors.