[Bug tree-optimization/54942] New: [4.8 Regression] ICE: OOM with -O3 -fno-cse-follow-jumps -funroll-loops

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54942

             Bug #: 54942
           Summary: [4.8 Regression] ICE: OOM with -O3
                    -fno-cse-follow-jumps -funroll-loops
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Created attachment 28459
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28459
reduced testcase

Compiler output:
$ gcc -O3 -fno-cse-follow-jumps -funroll-loops testcase.c

cc1: out of memory allocating 17179869180 bytes after a total of 733184 bytes

The original testcase didn't have uninitialised variables... I can provide it
if needed.

Tested revisions:
r192509 - fail
r191586 - OK
4.7 r191640 - OK