amd/common: scan which components of gl_WorkGroupID are used

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 09dd4bb..0194977 100644 (file)
--- a/src/amd/common/ac_shader_info.c
+++ b/src/amd/common/ac_shader_info.c
@@ -45,6 +45,14 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, struct ac_shader_info *info)
        case nir_intrinsic_load_num_work_groups:
                info->cs.uses_grid_size = true;
                break;
+       case nir_intrinsic_load_work_group_id: {
+               unsigned mask = nir_ssa_def_components_read(&instr->dest.ssa);
+               while (mask) {
+                       unsigned i = u_bit_scan(&mask);
+                       info->cs.uses_block_id[i] = true;
+               }
+               break;
+       }
        case nir_intrinsic_load_sample_id:
                info->ps.force_persample = true;
                break;

diff --git a/src/amd/common/ac_shader_info.h b/src/amd/common/ac_shader_info.h
index 3c809cc..7beefd0 100644 (file)
--- a/src/amd/common/ac_shader_info.h
+++ b/src/amd/common/ac_shader_info.h
@@ -43,6 +43,7 @@ struct ac_shader_info {
        } ps;
        struct {
                bool uses_grid_size;
+               bool uses_block_id[3];
        } cs;
 };