------- Comment #5 from hjl dot tools at gmail dot com 2008-09-09 04:23 -------
This patch fixes the crash:
--- i386.c.sse2 2008-09-08 21:17:15.000000000 -0700
+++ i386.c 2008-09-08 21:17:32.000000000 -0700
@@ -26886,7 +26886,7 @@ static void
ix86_expand_vector_init_interleave (enum machine_mode mode,
rtx target, rtx *ops, int n)
{
- enum machine_mode first_imode, second_imode, third_imode;
+ enum machine_mode first_imode, second_imode, third_imode, inner_mode;
int i, j;
rtx op0, op1;
rtx (*gen_load_even) (rtx, rtx, rtx);
@@ -26899,6 +26899,7 @@ ix86_expand_vector_init_interleave (enum
gen_load_even = gen_vec_setv8hi;
gen_interleave_first_low = gen_vec_interleave_lowv4si;
gen_interleave_second_low = gen_vec_interleave_lowv2di;
+ inner_mode = HImode;
first_imode = V4SImode;
second_imode = V2DImode;
third_imode = VOIDmode;
@@ -26907,6 +26908,7 @@ ix86_expand_vector_init_interleave (enum
gen_load_even = gen_vec_setv16qi;
gen_interleave_first_low = gen_vec_interleave_lowv8hi;
gen_interleave_second_low = gen_vec_interleave_lowv4si;
+ inner_mode = QImode;
first_imode = V8HImode;
second_imode = V4SImode;
third_imode = V2DImode;
@@ -26935,7 +26937,9 @@ ix86_expand_vector_init_interleave (enum
emit_move_insn (op0, gen_lowpart (mode, op1));
/* Load even elements into the second positon. */
- emit_insn ((*gen_load_even) (op0, ops [i + i + 1],
+ emit_insn ((*gen_load_even) (op0,
+ force_reg (inner_mode,
+ ops [i + i + 1]),
const1_rtx));
/* Cast vector to FIRST_IMODE vector. */
However the generated codes don't look good for 2 reasons:
1. By default, gcc won't generate inter-unit move between
GPR and SSE.
2. ix86_expand_vector_init doesn't take advantage of the
fact that the second half is the same as the first half
__v8hi D2094 = {D2073, D2076, D2079, 0, D2073, D2076, D2079, 0};
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37434
