On 11/17/2011 12:37 AM, Alan Modra wrote: > - oldval = convert_modes (SImode, mode, oldval, 1); > + oldval = gen_reg_rtx (SImode); > + convert_move (oldval, orig, 1); > oldval = expand_simple_binop (SImode, ASHIFT, oldval, shift, > oldval, 1, OPTAB_LIB_WIDEN);
Gah. From convert_modes, oldval is a subreg, and modifying that subreg gets us into all sorts of trouble. The fix should be as simple as - oldval, 1, OPTAB_LIB_WIDEN); + NULL_RTX, 1, OPTAB_LIB_WIDEN); so that we don't write back into the subreg. r~
