Mesa (master): amd/common: scan which components of gl_WorkGroupID are used

[Samuel Pitoiset]

Module: Mesa
Branch: master
Commit: 42285ed8c33c163914224719a5dabb54229046a9
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=42285ed8c33c163914224719a5dabb54229046a9

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Thu Dec 14 16:48:01 2017 +0100

amd/common: scan which components of gl_WorkGroupID are used

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

---

 src/amd/common/ac_shader_info.c | 8 ++++++++
 src/amd/common/ac_shader_info.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/src/amd/common/ac_shader_info.c b/src/amd/common/ac_shader_info.c
index 09dd4bbd55..01949770d6 100644
--- 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 3c809cce13..7beefd02ac 100644
--- 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;
 };