[Bug rtl-optimization/52715] New: [4.8 Regression] ICE: in reset_sched_cycles_in_current_ebb, at sel-sched.c:7140 with -fselective-scheduling2 -funroll-loops --param=max-average-unrolled-insns=406

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52715

             Bug #: 52715
           Summary: [4.8 Regression] ICE: in
                    reset_sched_cycles_in_current_ebb, at sel-sched.c:7140
                    with -fselective-scheduling2 -funroll-loops
                    --param=max-average-unrolled-insns=406
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: zso...@seznam.cz


Created attachment 26986
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26986
reduced testcase

Compiler output:
$ gcc -O2 -fno-omit-frame-pointer -fprefetch-loop-arrays -fno-rename-registers
-fsel-sched-pipelining -fselective-scheduling2 -funroll-loops
--param=max-average-unrolled-insns=406 testcase.c         
testcase.c: In function 'CRYPTO_cbc128_decrypt':
testcase.c:19:1: internal compiler error: in reset_sched_cycles_in_current_ebb,
at sel-sched.c:7140
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r185773 - crash
4.7 r185191 - OK