Rask Ingemann Lambertsen <[EMAIL PROTECTED]> writes: > Here something has gone wrong, and the parameters to > subreg_regno_offset() are invalid: > > (gdb) frame 1 > #1 0x08504786 in subreg_regno_offset (xregno=9, xmode=HImode, offset=2, > ymode=HImode) at rtlanal.c:3017 > > If I take out the lines 5643 and 5644 > > if (regno < FIRST_PSEUDO_REGISTER) > regno = subreg_regno (rld[r].in_reg); > > it will instead get regno = 10, mode = SImode and last_reg = (reg:SI 8 si) > and call subreg_regno_offset (xregno=8, xmode=SImode, offset=2, ymode=HImode) > which is fine and returns 1.
I have to agree that this looks rather dubious. It seems to me that when we increment regno in the lines above, we need to reset byte to 0. This bug, if it is a bug, has been there since this code was introduced: Fri Oct 16 20:40:50 1998 J"orn Rennecke <[EMAIL PROTECTED]> It seems possible that it could be a bug, since a SUBREG of a hard register is unusual. Ian
