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authorJason Ekstrand <[email protected]>2015-09-08 16:45:57 -0700
committerJason Ekstrand <[email protected]>2015-09-17 08:21:31 -0700
commitfc11dbe13f3470ff2a4cb91c6b063db2456664da (patch)
tree71405e7f421887251bb5eb476fe97307a9124fc9 /src/mesa/drivers
parenta6c467d6c574baf6636814b51f1dafe2557e22f6 (diff)
i965/vec4: Use nir_move_vec_src_uses_to_dest
The idea here is not that it gives register coalescing a little bit of a helping hand. It doesn't actually fix the coalescing problems, but it seems to help a good bit. Shader-db results for vec4 programs on Haswell: total instructions in shared programs: 1746280 -> 1683959 (-3.57%) instructions in affected programs: 1259166 -> 1196845 (-4.95%) helped: 11363 HURT: 148 v2 (Jason Ekstrand): - Run nir_move_vec_src_uses_to_dest after going out of SSA - New shader-db numbers Reviewed-by: Eduardo Lima Mitev <[email protected]>
Diffstat (limited to 'src/mesa/drivers')
-rw-r--r--src/mesa/drivers/dri/i965/brw_nir.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_nir.c b/src/mesa/drivers/dri/i965/brw_nir.c
index f326b239d74..9a0bbb06847 100644
--- a/src/mesa/drivers/dri/i965/brw_nir.c
+++ b/src/mesa/drivers/dri/i965/brw_nir.c
@@ -187,6 +187,9 @@ brw_create_nir(struct brw_context *brw,
nir_validate_shader(nir);
if (!is_scalar) {
+ nir_move_vec_src_uses_to_dest(nir);
+ nir_validate_shader(nir);
+
nir_lower_vec_to_movs(nir);
nir_validate_shader(nir);
}