i965/nir: Do not scalarize phis in non-scalar setups

Significantly reduces register pressure in some piglit tests. Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
2015-07-15 09:32:17 +02:00
parent 34d162260f
commit da1b1bf85c
1 changed files with 6 additions and 2 deletions
@@ -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);