[Bug c++/59736] New: ice with -O3 in cgraph_edge_brings_value_p

[dcb314 at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59736

            Bug ID: 59736
           Summary: ice with -O3 in cgraph_edge_brings_value_p
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com

Created attachment 31782
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31782&action=edit
gzipped C++ source code

I just compiled the attached code with gcc trunk 20140108
on a x86_64 box and it said

[dcb@zippy4 foundBugs]$ ../results/bin/g++ -c -O3 bug127.cc
ngramcount.cc:198:1: internal compiler error: Segmentation fault
0xc6eccf crash_signal
    ../../src/trunk/gcc/toplev.c:337
0x11c3cb5 cgraph_edge_brings_value_p
    ../../src/trunk/gcc/ipa-cp.c:2371
0x11c3cb5 get_info_about_necessary_edges
    ../../src/trunk/gcc/ipa-cp.c:2439
0x11cb06b decide_about_value
    ../../src/trunk/gcc/ipa-cp.c:3330
0x11cb06b decide_whether_version_node
    ../../src/trunk/gcc/ipa-cp.c:3411
0x11cb06b ipcp_decision_stage
    ../../src/trunk/gcc/ipa-cp.c:3556
0x11cb06b ipcp_driver
    ../../src/trunk/gcc/ipa-cp.c:3598
0x11cb06b execute
    ../../src/trunk/gcc/ipa-cp.c:3694
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Flag -O3 required.