i965/nir: Optimize after nir_lower_var_copies().

Array variable copy splitting generates a bunch of stuff we want to
clean up before proceeding.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index 28ef4178aab49f91c81d6d56c890e6cd8cca45f2..ef8369397059f68578f68539e242fd8080f56e50 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -102,6 +102,9 @@ fs_visitor::emit_nir_code()
    nir_lower_var_copies(nir);
    nir_validate_shader(nir);
 
+   /* Get rid of split copies */
+   nir_optimize(nir);
+
    nir_lower_io(nir);
    nir_validate_shader(nir);