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freedreno/ir3: relax restriction in grouping

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Currently we were two restrictive, and would insert an output move in
cases like: MOV OUT[0], IN[0].xyzw

Loosen the restriction to allow the current instruction to appear in the
neighbor list but only at it's current possition.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
This commit is contained in:
Rob Clark 2016-04-24 11:40:12 -04:00
parent 36c9ea6e79
commit 0831eb94b9
1 changed files with 5 additions and 3 deletions
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8
src/gallium/drivers/freedreno/ir3/ir3_group.c
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@ -92,8 +92,10 @@ static struct group_ops instr_ops = { instr_get, instr_insert_mov };
/* verify that cur != instr, but cur is also not in instr's neighbor-list: */
static bool
in_neighbor_list(struct ir3_instruction *instr, struct ir3_instruction *cur)
in_neighbor_list(struct ir3_instruction *instr, struct ir3_instruction *cur, int pos)
{
int idx = 0;
if (!instr)
return false;
@ -101,7 +103,7 @@ in_neighbor_list(struct ir3_instruction *instr, struct ir3_instruction *cur)
return true;
for (instr = ir3_neighbor_first(instr); instr; instr = instr->cp.right)
if (instr == cur)
if ((idx++ != pos) && (instr == cur))
return true;
return false;
@ -137,7 +139,7 @@ restart:
/* we also can't have an instr twice in the group: */
for (j = i + 1; (j < n) && !conflict; j++)
if (in_neighbor_list(ops->get(arr, j), instr))
if (in_neighbor_list(ops->get(arr, j), instr, i))
conflict = true;
if (conflict) {