- rc_move_output(&compiler.Base,
- VERT_RESULT_FOGC,
- vp->key.FogAttr - FRAG_ATTRIB_TEX0 + VERT_RESULT_TEX0, WRITEMASK_X);
+ unsigned int vp_fog_attr = vp->key.FogAttr - FRAG_ATTRIB_TEX0 + VERT_RESULT_TEX0;
+
+ /* Set empty writemask for instructions writing to vp_fog_attr
+ * before moving the fog attr there.
+ * Such instructions will be removed by DCE.
+ */
+ rc_move_output(&compiler.Base, vp_fog_attr, vp->key.FogAttr, 0);
+ rc_move_output(&compiler.Base, VERT_RESULT_FOGC, vp_fog_attr, WRITEMASK_X);