Commit: abd9d50faae749367aeb69d678c4e843d637c3dc
Author: Campbell Barton
Date:   Thu Jun 29 15:34:50 2017 +1000
Branches: blender2.8
https://developer.blender.org/rBabd9d50faae749367aeb69d678c4e843d637c3dc

Cleanup: quiet negative shift warning

===================================================================

M       source/blender/draw/intern/draw_cache_impl_mesh.c

===================================================================

diff --git a/source/blender/draw/intern/draw_cache_impl_mesh.c 
b/source/blender/draw/intern/draw_cache_impl_mesh.c
index d7bef6b1045..1bccdb87b64 100644
--- a/source/blender/draw/intern/draw_cache_impl_mesh.c
+++ b/source/blender/draw/intern/draw_cache_impl_mesh.c
@@ -490,15 +490,16 @@ static MeshRenderData *mesh_render_data_create_ex(
                rdata->cd.layers.vcol_active = 
CustomData_get_active_layer(cd_ldata, CD_MLOOPCOL);
                rdata->cd.layers.tangent_active = rdata->cd.layers.uv_active;
 
-               if ((cd_lused[CD_MLOOPUV] & (1 << rdata->cd.layers.uv_active)) 
== 0) {
-                       rdata->cd.layers.uv_active = -1;
-               }
-               if ((cd_lused[CD_TANGENT] & (1 << 
rdata->cd.layers.tangent_active)) == 0) {
-                       rdata->cd.layers.tangent_active = -1;
-               }
-               if ((cd_lused[CD_MLOOPCOL] & (1 << 
rdata->cd.layers.vcol_active)) == 0) {
-                       rdata->cd.layers.vcol_active = -1;
-               }
+#define CD_VALIDATE_ACTIVE_LAYER(active_index, used) \
+               if ((active_index != -1) && (used & (1 << active_index)) == 0) 
{ \
+                       active_index = -1; \
+               } ((void)0)
+
+               CD_VALIDATE_ACTIVE_LAYER(rdata->cd.layers.uv_active, 
cd_lused[CD_MLOOPUV]);
+               CD_VALIDATE_ACTIVE_LAYER(rdata->cd.layers.tangent_active, 
cd_lused[CD_TANGENT]);
+               CD_VALIDATE_ACTIVE_LAYER(rdata->cd.layers.vcol_active, 
cd_lused[CD_MLOOPCOL]);
+
+#undef CD_VALIDATE_ACTIVE_LAYER
 
                if (cd_vused[CD_ORCO] & 1) {
                        rdata->orco = CustomData_get_layer(cd_vdata, CD_ORCO);

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