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combine.c (gen_lowpart_for_combine): Handle vector modes. 

* combine.c (gen_lowpart_for_combine): Handle vector modes.
	Supply non-VOID mode to simplify_gen_subreg.

From-SVN: r55375
This commit is contained in:
J"orn Rennecke 2002-07-10 18:51:20 +00:00 committed by Joern Rennecke
parent 6e04241fb6
commit 80ba02b10c
2 changed files with 13 additions and 8 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
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.

16
gcc/combine.c
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@ -9831,12 +9831,6 @@ gen_lowpart_for_combine (mode, x)
|| 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. */
@ -9903,9 +9897,15 @@ gen_lowpart_for_combine (mode, x)
{
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);