[Bug middle-end/48954] New: [4.7 Regression] ICE: SIGSEGV in bitmap_count_bits (bitmap.c:719) with -O2 -flto -fno-early-inlining -fkeep-inline-functions

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48954

           Summary: [4.7 Regression] ICE: SIGSEGV in bitmap_count_bits
                    (bitmap.c:719) with -O2 -flto -fno-early-inlining
                    -fkeep-inline-functions
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: zso...@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 24220
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24220
reduced testcase

Compiler output (run under valgrind):
$ g++ -O2 -flto -fno-early-inlining -fkeep-inline-functions testcase.C
==3584== 
==3584== Invalid read of size 8
==3584==    at 0x507DE6: bitmap_count_bits (bitmap.c:719)
==3584==    by 0x7491C2: output_cgraph (lto-cgraph.c:1591)
==3584==    by 0x759C91: lto_output (lto-streamer-out.c:2222)
==3584==    by 0x7940E2: ipa_write_optimization_summaries_1 (passes.c:1760)
==3584==    by 0x794C2F: ipa_write_optimization_summaries (passes.c:1806)
==3584==    by 0x4F59DA: lto_main (lto.c:1996)
==3584==    by 0x880F69: toplev_main (toplev.c:570)
==3584==    by 0x644AB6C: (below main) (in /lib64/libc-2.11.3.so)
==3584==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==3584== 
lto1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r173586 - crash
4.6 r173059 - OK (yes,rtl,df checking)