Cleanup: redundant initialization

These were limited to obvious cases. Some less obvious cases
were kept as refactoring might make them necessary in future.

source/blender/blenkernel/intern/mesh.c

@@ -1521,12 +1521,12 @@ void BKE_mesh_transform(Mesh *me, const float mat[4][4], bool do_keys)
 
 void BKE_mesh_translate(Mesh *me, const float offset[3], const bool do_keys)
 {
-  MVert *mvert = CustomData_duplicate_referenced_layer(&me->vdata, CD_MVERT, me->totvert);
+  CustomData_duplicate_referenced_layer(&me->vdata, CD_MVERT, me->totvert);
   /* If the referenced layer has been re-allocated need to update pointers stored in the mesh. */
   BKE_mesh_update_customdata_pointers(me, false);
 
   int i = me->totvert;
-  for (mvert = me->mvert; i--; mvert++) {
+  for (MVert *mvert = me->mvert; i--; mvert++) {
     add_v3_v3(mvert->co, offset);
   }
 

source/blender/blenkernel/intern/mesh_evaluate.c

@@ -2567,7 +2567,7 @@ bool BKE_mesh_center_median_from_polys(const Mesh *me, float r_cent[3])
   const MLoop *mloop = me->mloop;
   const MVert *mvert = me->mvert;
   zero_v3(r_cent);
-  for (mpoly = me->mpoly; i--; mpoly++) {
+  for (; i--; mpoly++) {
     int loopend = mpoly->loopstart + mpoly->totloop;
     for (int j = mpoly->loopstart; j < loopend; j++) {
       add_v3_v3(r_cent, mvert[mloop[j].v].co);

source/blender/blenkernel/intern/subsurf_ccg.c

@@ -1879,12 +1879,11 @@ static const MeshElemMap *ccgDM_getPolyMap(Object *ob, DerivedMesh *dm)
 /* WARNING! *MUST* be called in an 'loops_cache_rwlock' protected thread context! */
 static void ccgDM_recalcLoopTri(DerivedMesh *dm)
 {
-  MLoopTri *mlooptri = dm->looptris.array;
   const int tottri = dm->numPolyData * 2;
   int i, poly_index;
 
   DM_ensure_looptri_data(dm);
-  mlooptri = dm->looptris.array_wip;
+  MLoopTri *mlooptri = dm->looptris.array_wip;
 
   BLI_assert(tottri == 0 || mlooptri != NULL);
   BLI_assert(poly_to_tri_count(dm->numPolyData, dm->numLoopData) == dm->looptris.num);

source/blender/blenlib/intern/mesh_boolean.cc

@@ -1406,9 +1406,9 @@ static int find_cell_for_point_near_edge(mpq3 p,
   int dummy_index = p_sorted_dummy - sorted_tris.begin();
   int prev_tri = (dummy_index == 0) ? sorted_tris[sorted_tris.size() - 1] :
                                       sorted_tris[dummy_index - 1];
-  int next_tri = (dummy_index == sorted_tris.size() - 1) ? sorted_tris[0] :
-                                                           sorted_tris[dummy_index + 1];
   if (dbg_level > 0) {
+    int next_tri = (dummy_index == sorted_tris.size() - 1) ? sorted_tris[0] :
+                                                             sorted_tris[dummy_index + 1];
     std::cout << "prev tri to dummy = " << prev_tri << ";  next tri to dummy = " << next_tri
               << "\n";
   }

source/blender/blenloader/intern/versioning_280.c

@@ -3172,7 +3172,7 @@ void blo_do_versions_280(FileData *fd, Library *UNUSED(lib), Main *bmain)
           bool is_blend = false;
 
           {
-            char tool = tool_init;
+            char tool;
             switch (tool_init) {
               case PAINT_BLEND_MIX:
                 tool = VPAINT_TOOL_DRAW;

source/blender/bmesh/tools/bmesh_bevel.c

@@ -7361,7 +7361,6 @@ static float geometry_collide_offset(BevelParams *bp, EdgeHalf *eb)
 static float vertex_collide_offset(BevelParams *bp, EdgeHalf *ea)
 {
   float no_collide_offset = bp->offset + 1e6;
-  float limit = no_collide_offset;
   if (bp->offset == 0.0f) {
     return no_collide_offset;
   }
@@ -7373,8 +7372,7 @@ static float vertex_collide_offset(BevelParams *bp, EdgeHalf *ea)
   if (kab <= 0.0f) {
     return no_collide_offset;
   }
-  limit = la / kab;
-  return limit;
+  return la / kab;
 }
 
 /**

source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc

@@ -320,7 +320,6 @@ bool id_copy_inplace_no_main(const ID *id, ID *newid)
  * is already allocated. */
 bool scene_copy_inplace_no_main(const Scene *scene, Scene *new_scene)
 {
-  const ID *id_for_copy = &scene->id;
 
   if (G.debug & G_DEBUG_DEPSGRAPH_UUID) {
     SEQ_relations_check_uuids_unique_and_report(scene);
@@ -328,9 +327,10 @@ bool scene_copy_inplace_no_main(const Scene *scene, Scene *new_scene)
 
 #ifdef NESTED_ID_NASTY_WORKAROUND
   NestedIDHackTempStorage id_hack_storage;
-  id_for_copy = nested_id_hack_get_discarded_pointers(&id_hack_storage, &scene->id);
+  const ID *id_for_copy = nested_id_hack_get_discarded_pointers(&id_hack_storage, &scene->id);
+#else
+  const ID *id_for_copy = &scene->id;
 #endif
-
   bool result = (BKE_id_copy_ex(nullptr,
                                 id_for_copy,
                                 (ID **)&new_scene,

source/blender/draw/engines/overlay/overlay_armature.c

@@ -2063,9 +2063,8 @@ static void draw_armature_pose(ArmatureDrawContext *ctx)
           set_pchan_colorset(ctx, ob, pchan);
         }
 
-        int boneflag = bone->flag;
         /* catch exception for bone with hidden parent */
-        boneflag = bone->flag;
+        int boneflag = bone->flag;
         if ((bone->parent) && (bone->parent->flag & (BONE_HIDDEN_P | BONE_HIDDEN_PG))) {
           boneflag &= ~BONE_CONNECTED;
         }

source/blender/editors/curve/editcurve.c

@@ -6646,7 +6646,7 @@ void CURVE_OT_dissolve_verts(wmOperatorType *ot)
 
 static bool nurb_bezt_flag_any(const Nurb *nu, const char flag_test)
 {
-  BezTriple *bezt = nu->bezt;
+  const BezTriple *bezt;
   int i;
 
   for (i = nu->pntsu, bezt = nu->bezt; i--; bezt++) {

source/blender/editors/curve/editcurve_paint.c

@@ -387,7 +387,6 @@ static void curve_draw_stroke_3d(const struct bContext *UNUSED(C),
       GPU_matrix_translate_3f(selem->location_local[0] - location_prev[0],
                               selem->location_local[1] - location_prev[1],
                               selem->location_local[2] - location_prev[2]);
-      location_prev = selem->location_local;
 
       const float radius = stroke_elem_radius(cdd, selem);
 

source/blender/editors/gpencil/gpencil_trace_utils.c

@@ -281,7 +281,6 @@ void ED_gpencil_trace_data_to_strokes(Main *bmain,
     mat_mask_idx = ob->totcol - 1;
   }
 
-  potrace_path_t *path = st->plist;
   int n, *tag;
   potrace_dpoint_t(*c)[3];
 
@@ -289,7 +288,7 @@ void ED_gpencil_trace_data_to_strokes(Main *bmain,
    * good results using the Potrace data. */
   const float scalef = 0.008f * scale;
   /* Draw each curve. */
-  path = st->plist;
+  potrace_path_t *path = st->plist;
   while (path != NULL) {
     n = path->curve.n;
     tag = path->curve.tag;

source/blender/editors/mesh/meshtools.c

@@ -149,7 +149,7 @@ static void join_mesh_single(Depsgraph *depsgraph,
       mul_m4_m4m4(cmat, imat, ob_src->obmat);
 
       /* transform vertex coordinates into new space */
-      for (a = 0, mvert = *mvert_pp; a < me->totvert; a++, mvert++) {
+      for (a = 0; a < me->totvert; a++, mvert++) {
         mul_m4_v3(cmat, mvert->co);
       }
 

source/blender/editors/sculpt_paint/sculpt_undo.c

@@ -1189,9 +1189,7 @@ static SculptUndoNode *sculpt_undo_geometry_push(Object *object, SculptUndoType
 static SculptUndoNode *sculpt_undo_face_sets_push(Object *ob, SculptUndoType type)
 {
   UndoSculpt *usculpt = sculpt_undo_get_nodes();
-  SculptUndoNode *unode = usculpt->nodes.first;
-
-  unode = MEM_callocN(sizeof(*unode), __func__);
+  SculptUndoNode *unode = MEM_callocN(sizeof(*unode), __func__);
 
   BLI_strncpy(unode->idname, ob->id.name, sizeof(unode->idname));
   unode->type = type;

source/blender/editors/space_clip/clip_ops.c

@@ -1235,10 +1235,8 @@ static void do_movie_proxy(void *pjv,
                            float *progress)
 {
   ProxyJob *pj = pjv;
-  Scene *scene = pj->scene;
   MovieClip *clip = pj->clip;
   struct MovieDistortion *distortion = NULL;
-  int cfra, sfra = SFRA, efra = EFRA;
 
   if (pj->index_context) {
     IMB_anim_index_rebuild(pj->index_context, stop, do_update, progress);
@@ -1252,8 +1250,8 @@ static void do_movie_proxy(void *pjv,
     return;
   }
 
-  sfra = 1;
-  efra = clip->len;
+  const int sfra = 1;
+  const int efra = clip->len;
 
   if (build_undistort_count) {
     int threads = BLI_system_thread_count();
@@ -1265,7 +1263,7 @@ static void do_movie_proxy(void *pjv,
     BKE_tracking_distortion_set_threads(distortion, threads);
   }
 
-  for (cfra = sfra; cfra <= efra; cfra++) {
+  for (int cfra = sfra; cfra <= efra; cfra++) {
     BKE_movieclip_build_proxy_frame(
         clip, pj->clip_flag, distortion, cfra, build_undistort_sizes, build_undistort_count, 1);
 

source/blender/editors/space_graph/graph_select.c

@@ -1805,7 +1805,6 @@ static int graphkeys_mselect_column(bAnimContext *ac,
   KeyframeEditFunc select_cb, ok_cb;
   KeyframeEditData ked;
   tNearestVertInfo *nvi;
-  float selx = (float)ac->scene->r.cfra;
 
   /* find the beztriple that we're selecting, and the handle that was clicked on */
   nvi = find_nearest_fcurve_vert(ac, mval);
@@ -1817,7 +1816,7 @@ static int graphkeys_mselect_column(bAnimContext *ac,
 
   /* get frame number on which elements should be selected */
   /* TODO: should we restrict to integer frames only? */
-  selx = nvi->frame;
+  const float selx = nvi->frame;
 
   if (select_mode != SELECT_REPLACE) {
     /* Doesn't need to deselect anything -> Pass. */

source/blender/editors/space_image/image_ops.c

@@ -1311,7 +1311,6 @@ static int image_open_exec(bContext *C, wmOperator *op)
   Scene *scene = CTX_data_scene(C);
   Object *obedit = CTX_data_edit_object(C);
   ImageUser *iuser = NULL;
-  ImageOpenData *iod = op->customdata;
   Image *ima = NULL;
   int frame_seq_len = 0;
   int frame_ofs = 1;
@@ -1345,7 +1344,7 @@ static int image_open_exec(bContext *C, wmOperator *op)
   }
 
   /* hook into UI */
-  iod = op->customdata;
+  ImageOpenData *iod = op->customdata;
 
   if (iod->pprop.prop) {
     /* when creating new ID blocks, use is already 1, but RNA

source/blender/editors/space_info/info_draw.c

@@ -134,14 +134,12 @@ static void report_textview_end(TextViewContext *UNUSED(tvc))
 static int report_textview_step(TextViewContext *tvc)
 {
   /* simple case, but no newline support */
-  const Report *report = tvc->iter;
-
   if (tvc->iter_char_begin <= 0) {
     tvc->iter = (void *)((Link *)tvc->iter)->prev;
     if (tvc->iter && report_textview_skip__internal(tvc)) {
       tvc->iter_tmp++;
 
-      report = tvc->iter;
+      const Report *report = tvc->iter;
       tvc->iter_char_end = report->len; /* reset start */
       report_textview_init__internal(tvc);
 

source/blender/editors/transform/transform_mode_maskshrinkfatten.c

@@ -89,7 +89,7 @@ static void applyMaskShrinkFatten(TransInfo *t, const int UNUSED(mval[2]))
 
   /* apply shrink/fatten */
   FOREACH_TRANS_DATA_CONTAINER (t, tc) {
-    TransData *td = tc->data;
+    TransData *td;
     for (td = tc->data, i = 0; i < tc->data_len; i++, td++) {
       if (td->flag & TD_SKIP) {
         continue;

source/blender/editors/transform/transform_snap.c

@@ -1072,7 +1072,7 @@ static void TargetSnapClosest(TransInfo *t)
     if (t->options & CTX_OBJECT) {
       int i;
       FOREACH_TRANS_DATA_CONTAINER (t, tc) {
-        TransData *td = tc->data;
+        TransData *td;
         for (td = tc->data, i = 0; i < tc->data_len && td->flag & TD_SELECTED; i++, td++) {
           const BoundBox *bb = NULL;
 

source/blender/gpencil_modifiers/intern/lineart/lineart_chain.c

@@ -198,7 +198,7 @@ void MOD_lineart_chain_feature_lines(LineartRenderBuffer *rb)
      * so we assign it based on the first segment we found. */
     ec->object_ref = e->object_ref;
 
-    LineartEdge *new_e = e;
+    LineartEdge *new_e;
     LineartVert *new_vt;
     float N[3] = {0};
 

source/blender/gpu/intern/gpu_shader.cc

@@ -159,7 +159,7 @@ void Shader::print_log(Span<const char *> sources, char *log, const char *stage,
     }
     /* Print line from the source file that is producing the error. */
     if ((error_line != -1) && (error_line != last_error_line || error_char != last_error_char)) {
-      const char *src_line_end = src_line;
+      const char *src_line_end;
       found_line_id = false;
       /* error_line is 1 based in this case. */
       int src_line_index = 1;

source/blender/makesdna/intern/dna_genfile.c

@@ -1564,9 +1564,8 @@ DNA_ReconstructInfo *DNA_reconstruct_info_create(const SDNA *oldsdna,
     ReconstructStep *steps = create_reconstruct_steps_for_struct(
         oldsdna, newsdna, compare_flags, old_struct, new_struct);
 
-    int steps_len = new_struct->members_len;
     /* Comment the line below to skip the compression for debugging purposes. */
-    steps_len = compress_reconstruct_steps(steps, new_struct->members_len);
+    const int steps_len = compress_reconstruct_steps(steps, new_struct->members_len);
 
     reconstruct_info->steps[new_struct_nr] = steps;
     reconstruct_info->step_counts[new_struct_nr] = steps_len;

source/blender/makesrna/intern/rna_scene.c

@@ -1912,10 +1912,9 @@ static void rna_Scene_transform_orientation_slots_begin(CollectionPropertyIterat
       iter, orient_slot, sizeof(*orient_slot), ARRAY_SIZE(scene->orientation_slots), 0, NULL);
 }
 
-static int rna_Scene_transform_orientation_slots_length(PointerRNA *ptr)
+static int rna_Scene_transform_orientation_slots_length(PointerRNA *UNUSED(ptr))
 {
-  Scene *scene = (Scene *)ptr->owner_id;
-  return ARRAY_SIZE(scene->orientation_slots);
+  return ARRAY_SIZE(((Scene *)NULL)->orientation_slots);
 }
 
 static bool rna_Scene_use_audio_get(PointerRNA *ptr)

source/blender/makesrna/intern/rna_userdef.c

@@ -1072,10 +1072,9 @@ static void rna_UserDef_studiolight_solid_lights_begin(CollectionPropertyIterato
   rna_iterator_array_begin(iter, sl->light, sizeof(*sl->light), ARRAY_SIZE(sl->light), 0, NULL);
 }
 
-static int rna_UserDef_studiolight_solid_lights_length(PointerRNA *ptr)
+static int rna_UserDef_studiolight_solid_lights_length(PointerRNA *UNUSED(ptr))
 {
-  StudioLight *sl = (StudioLight *)ptr->data;
-  return ARRAY_SIZE(sl->light);
+  return ARRAY_SIZE(((StudioLight *)NULL)->light);
 }
 
 /* StudioLight.light_ambient */

source/blender/sequencer/intern/strip_add.c

@@ -409,7 +409,7 @@ Sequence *SEQ_add_sound_strip(Main *bmain, Scene *scene, ListBase *seqbase, SeqL
 
   Strip *strip = seq->strip;
   /* We only need 1 element to store the filename. */
-  StripElem *se = strip->stripdata = se = MEM_callocN(sizeof(StripElem), "stripelem");
+  StripElem *se = strip->stripdata = MEM_callocN(sizeof(StripElem), "stripelem");
   BLI_split_dirfile(load_data->path, strip->dir, se->name, sizeof(strip->dir), sizeof(se->name));
 
   if (seq != NULL && seq->sound != NULL) {

source/blender/windowmanager/intern/wm_files.c

@@ -911,7 +911,10 @@ void wm_homefile_read(bContext *C,
                       const char *app_template_override,
                       bool *r_is_factory_startup)
 {
-  Main *bmain = G_MAIN; /* Context does not always have valid main pointer here... */
+#if 0 /* UNUSED, keep as this may be needed later & the comment below isn't self evident. */
+  /* Context does not always have valid main pointer here. */
+  Main *bmain = G_MAIN;
+#endif
   ListBase wmbase;
   bool success = false;
 
@@ -1170,7 +1173,7 @@ void wm_homefile_read(bContext *C,
     BLI_strncpy(U.app_template, app_template_override, sizeof(U.app_template));
   }
 
-  bmain = CTX_data_main(C);
+  Main *bmain = CTX_data_main(C);
 
   if (use_userdef) {
     /* check userdef before open window, keymaps etc */
@@ -2482,12 +2485,11 @@ static void wm_open_mainfile_ui(bContext *UNUSED(C), wmOperator *op)
 {
   struct FileRuntime *file_info = (struct FileRuntime *)&op->customdata;
   uiLayout *layout = op->layout;
-  uiLayout *col = op->layout;
   const char *autoexec_text;
 
   uiItemR(layout, op->ptr, "load_ui", 0, NULL, ICON_NONE);
 
-  col = uiLayoutColumn(layout, false);
+  uiLayout *col = uiLayoutColumn(layout, false);
   if (file_info->is_untrusted) {
     autoexec_text = IFACE_("Trusted Source [Untrusted Path]");
     uiLayoutSetActive(col, false);