+Wed Jul 10 19:50:03 2002 J"orn Rennecke <joern.rennecke@superh.com>
+
+ * combine.c (gen_lowpart_for_combine): Handle vector modes.
+ Supply non-VOID mode to simplify_gen_subreg.
+
Wed Jul 10 18:48:55 CEST 2002 Jan Hubicka <jh@suse.cz>
* i386.c (ix86_init_mmx_sse_builtins): Fix thinko.
|| GET_MODE_SIZE (GET_MODE (x)) == GET_MODE_SIZE (mode)))
return gen_rtx_CLOBBER (GET_MODE (x), const0_rtx);
- /* simplify_gen_subreg does not know how to handle the case where we try
- to convert an integer constant to a vector.
- ??? We could try to teach it to generate CONST_VECTORs. */
- if (GET_MODE (x) == VOIDmode && VECTOR_MODE_P (mode))
- return gen_rtx_CLOBBER (GET_MODE (x), const0_rtx);
-
/* X might be a paradoxical (subreg (mem)). In that case, gen_lowpart
won't know what to do. So we will strip off the SUBREG here and
process normally. */
{
int offset = 0;
rtx res;
+ enum machine_mode sub_mode = GET_MODE (x);
- offset = subreg_lowpart_offset (mode, GET_MODE (x));
- res = simplify_gen_subreg (mode, x, GET_MODE (x), offset);
+ offset = subreg_lowpart_offset (mode, sub_mode);
+ if (sub_mode == VOIDmode)
+ {
+ sub_mode = int_mode_for_mode (mode);
+ x = gen_lowpart_common (sub_mode, x);
+ }
+ res = simplify_gen_subreg (mode, x, sub_mode, offset);
if (res)
return res;
return gen_rtx_CLOBBER (GET_MODE (x), const0_rtx);