[Bug debug/48343] [4.6/4.7 Regression] ICE compiling i586 linux-2.6.38/drivers/staging/wlan-ng/p80211wep.c: in form_sum, at reload.c:5338

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48343

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-30 
14:11:13 UTC ---
Seems to be a combiner VTA bug.
try_combine decides to SUBST_MODE, because it has a single (non-debug) use and
single set, changes a pseudo from SImode to QImode, which magically changes the
mode also in the debug insn which also uses it and nothing afterwards fixes up
the debug_insn.