[Bug debug/46867] New: [4.6 Regression] ICE: in emit_note_insn_var_location, at var-tracking.c:7325 with -O -g

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46867

           Summary: [4.6 Regression] ICE: in emit_note_insn_var_location,
                    at var-tracking.c:7325 with -O -g
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 22692
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22692
reduced testcase

Compiler output:
$ gcc -O -g pr46867.c 
pr46867.c: In function 'foo':
pr46867.c:29:1: internal compiler error: in emit_note_insn_var_location, at
var-tracking.c:7325
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r167621 - crash
r165699 - crash
r161659 - OK
4.5 r166509 - OK