[Bug rtl-optimization/61509] New: GCC miscompilation on ARM during RTL optimization when compiled with -O3

[quentusrex at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61509

            Bug ID: 61509
           Summary: GCC miscompilation on ARM during RTL optimization when
                    compiled with -O3
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: quentusrex at gmail dot com

C code:
if(strcasecmp(var,"a")) 
else if(strcasecmp(var, "b") 

the second call to strcasecmp is being optimized out, and the control statement
is effectively being treated as an if() else statement.

More detailed write up here: 
http://quentusrex.com/freeswitch-raspberrypi-gcc-compiler-bug.html

Debug files located here:
https://github.com/quentusrex/FS-6495/tree/master/gcc_debug_orig

The second call to strcasecmp is being removed in pass #200 during a DCE loop.