- if (variability_constant == get_entity_variability(ent)) {
- if (is_atomic_entity(ent)) {
- /* Might not be atomic after lowering of Sels. In this case we
- * could also load, but it's more complicated. */
- /* more simpler case: we load the content of a constant value:
- * replace it by the constant itself */
- value = get_atomic_ent_value(ent);
- } else if (ent->has_initializer) {
- /* new style initializer */
- value = find_compound_ent_value(ptr);
- } else {
- /* old style initializer */
- compound_graph_path *path = get_accessed_path(ptr);
-
- if (path != NULL) {
- assert(is_proper_compound_graph_path(path, get_compound_graph_path_length(path)-1));
-
- value = get_compound_ent_value_by_path(ent, path);
- DB((dbg, LEVEL_1, " Constant access at %F%F resulted in %+F\n", ent, path, value));
- free_compound_graph_path(path);
- }
+ /* no exception, clear the info field as it might be checked later again */
+ if (info->projs[pn_Load_X_except]) {
+ ir_graph *irg = get_irn_irg(load);
+ exchange(info->projs[pn_Load_X_except], new_r_Bad(irg, mode_X));
+ info->projs[pn_Load_X_except] = NULL;
+ res |= CF_CHANGED;
+ }
+ if (info->projs[pn_Load_X_regular]) {
+ exchange(info->projs[pn_Load_X_regular], new_r_Jmp(get_nodes_block(load)));
+ info->projs[pn_Load_X_regular] = NULL;
+ res |= CF_CHANGED;
+ }
+
+ if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
+ if (has_entity_initializer(ent)) {
+ /* new style initializer */
+ value = find_compound_ent_value(ptr);
+ } else if (entity_has_compound_ent_values(ent)) {
+ /* old style initializer */
+ compound_graph_path *path = get_accessed_path(ptr);
+
+ if (path != NULL) {
+ assert(is_proper_compound_graph_path(path, get_compound_graph_path_length(path)-1));
+
+ value = get_compound_ent_value_by_path(ent, path);
+ DB((dbg, LEVEL_1, " Constant access at %F%F resulted in %+F\n", ent, path, value));
+ free_compound_graph_path(path);
+ }
+ }
+ if (value != NULL) {
+ ir_graph *irg = get_irn_irg(load);
+ value = can_replace_load_by_const(load, value);
+ if (value != NULL && is_Sel(ptr) &&
+ !is_irg_state(irg, IR_GRAPH_STATE_IMPLICIT_BITFIELD_MASKING)) {
+ /* frontend has inserted masking operations after bitfield accesses,
+ * so we might have to shift the const. */
+ unsigned char bit_offset = get_entity_offset_bits_remainder(get_Sel_entity(ptr));
+ ir_tarval *tv_old = get_Const_tarval(value);
+ ir_tarval *tv_offset = new_tarval_from_long(bit_offset, mode_Bu);
+ ir_tarval *tv_new = tarval_shl(tv_old, tv_offset);
+ value = new_r_Const(irg, tv_new);