radv: do not add extra SGPR when push constants are not used

This is not because the vertex stage needs some push constants
that other stages need them too. This should reduce the number
of loaded SGPRs in some situations.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/amd/common/ac_shader_info.c b/src/amd/common/ac_shader_info.c
index 6aadb50..ab5388f 100644 (file)
--- a/src/amd/common/ac_shader_info.c
+++ b/src/amd/common/ac_shader_info.c
@@ -149,7 +149,8 @@ ac_nir_shader_info_pass(struct nir_shader *nir,
        struct nir_function *func = (struct nir_function *)exec_list_get_head(&nir->functions);
 
        info->needs_push_constants = false;
-       if (options->layout->push_constant_size ||
+       if ((options->layout->push_constant_size &&
+            options->layout->push_constant_stages & (1 << nir->info.stage)) ||
            options->layout->dynamic_offset_count)
                info->needs_push_constants = true;