From: Iago Toral Quiroga <[email protected]>
Significantly reduces register pressure in some piglit tests.
---
src/mesa/drivers/dri/i965/brw_nir.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_nir.c
b/src/mesa/drivers/dri/i965/brw_nir.c
index a4ea147..87b7a30 100644
--- a/src/mesa/drivers/dri/i965/brw_nir.c
+++ b/src/mesa/drivers/dri/i965/brw_nir.c
@@ -42,8 +42,12 @@ nir_optimize(nir_shader *nir, bool is_scalar)
progress |= nir_copy_prop(nir);
nir_validate_shader(nir);
- nir_lower_phis_to_scalar(nir);
- nir_validate_shader(nir);
+
+ if (is_scalar) {
+ nir_lower_phis_to_scalar(nir);
+ nir_validate_shader(nir);
+ }
+
progress |= nir_copy_prop(nir);
nir_validate_shader(nir);
progress |= nir_opt_dce(nir);
--
2.1.4
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