[Bug c++/46806] New: -O3 implies 0 <= 8 <= 7

[cstankevitz at toyon dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46806

           Summary: -O3 implies 0 <= 8 <= 7
           Product: gcc
           Version: 4.5.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: cstankevitz@toyon.com
              Host: Linux seymour.toyon.corp 2.6.35.6-48.fc14.x86_64 #1
                    SMP Fri Oct 22 15:36:08 UTC 2010 x86_64 x86_64 x86_64
                    GNU/Linux
             Build: g++ (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)


Created attachment 22636
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22636
sample program

Linux seymour.toyon.corp 2.6.35.6-48.fc14.x86_64 #1 SMP Fri Oct 22 15:36:08 UTC
2010 x86_64 x86_64 x86_64 GNU/Linux

g++ (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)

Compile the attached source with "g++ test.cpp -O3" and the executable will
report 0<=8<=7.

To make the strange result go away:

- comment out the do-nothing line gValue = EdgeType (or make a number of other
minor changes)

- compile with -O1