nir: add nir_opt_shrink_load pass

This is a very simple pass that just shrinks load_push_constant
intrinsics when some components are unused. For now, it can just
shrink vec4 to vec3, vec3 to vec2 and so on.

Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Bas Nieuwenhuizen <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 9ab2769e067..5ea8c9926b9 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -2770,6 +2770,8 @@ bool nir_opt_peephole_select(nir_shader *shader, unsigned limit);
 
 bool nir_opt_remove_phis(nir_shader *shader);
 
+bool nir_opt_shrink_load(nir_shader *shader);
+
 bool nir_opt_trivial_continues(nir_shader *shader);
 
 bool nir_opt_undef(nir_shader *shader);