Mesa (master): pan/midgard: Compute spill costs
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Thu Nov 14 02:58:51 UTC 2019
Module: Mesa
Branch: master
Commit: 23c83f3f05d95c9ee519914a5798fd72d880d8bc
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=23c83f3f05d95c9ee519914a5798fd72d880d8bc
Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date: Sat Oct 26 10:08:18 2019 -0400
pan/midgard: Compute spill costs
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
---
src/panfrost/midgard/midgard_schedule.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/src/panfrost/midgard/midgard_schedule.c b/src/panfrost/midgard/midgard_schedule.c
index e5ec8f87225..588f7c6302e 100644
--- a/src/panfrost/midgard/midgard_schedule.c
+++ b/src/panfrost/midgard/midgard_schedule.c
@@ -1195,10 +1195,21 @@ static void mir_spill_register(
* spill node. All nodes are equal in spill cost, but we can't spill
* nodes written to from an unspill */
- for (unsigned i = 0; i < ctx->temp_count; ++i) {
- lcra_set_node_spill_cost(l, i, 1);
+ unsigned *cost = calloc(ctx->temp_count, sizeof(cost[0]));
+
+ mir_foreach_instr_global(ctx, ins) {
+ if (ins->dest < ctx->temp_count)
+ cost[ins->dest]++;
+
+ mir_foreach_src(ins, s) {
+ if (ins->src[s] < ctx->temp_count)
+ cost[ins->src[s]]++;
+ }
}
+ for (unsigned i = 0; i < ctx->temp_count; ++i)
+ lcra_set_node_spill_cost(l, i, cost[i]);
+
/* We can't spill any bundles that contain unspills. This could be
* optimized to allow use of r27 to spill twice per bundle, but if
* you're at the point of optimizing spilling, it's too late.
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