[Bug middle-end/48043] pr47201: var-tracking loc_order_check fails for type punning examples

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48043

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-09 
19:34:58 UTC ---
bb 2 op 19 insn 30 MO_VAL_SET (concat/u:SF (value/u:SI 12:5945
@0x243ae38/0x2445870)
        (reg:SF 17 %f2))
Either we should SUBREG this to the VALUE's mode, or allow different modes.  If
we do the latter, then we'll need to SUBREG it at vt_expand_loc_callback time.