------- Comment #2 from hjl dot tools at gmail dot com 2008-08-18 23:24 -------
The particular insn is
(insn 72 70 73 8 x.i:17 (set (reg:SI 386)
(minus:SI (subreg:SI (reg/f:DI 376 [ ivtmp.14 ]) 0)
(subreg:SI (reg/f:DI 335 virtual-stack-vars) 0))) 165 {subsi3}
(nil))
(gdb) f 0
#0 subreg_offset_representable_p (xregno=328, xmode=DImode, offset=0,
ymode=SImode) at ../../src/gcc/rtlanal.c:3244
3244 return (info.representable_p
(gdb) f 1
#1 0x4000000000377740 in validate_subreg (omode=SImode, imode=DImode,
reg=0x20000000035506c0, offset=0) at ../../src/gcc/emit-rtl.c:755
755 return subreg_offset_representable_p (regno, imode, offset,
omode);
(gdb) call debug_rtx (reg)
(reg/f:DI 328 sfp)
(gdb)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37155
