/* For special reads, figure out how many bytes we need */
unsigned read_bytemask = 0;
+ /* If multiple instructions write to this destination, we'll have to
+ * fill from TLS before writing */
+ unsigned write_count = 0;
+
mir_foreach_instr_global_safe(ctx, ins) {
read_bytemask |= mir_bytemask_of_read_components(ins, spill_node);
+ if (ins->dest == spill_node)
+ ++write_count;
}
/* For TLS, replace all stores to the spilled node. For
mir_insert_instruction_after_scheduled(ctx, block, ins, st);
} else {
- ins->dest = spill_index++;
+ unsigned dest = spill_index++;
+
+ if (write_count > 1 && mir_bytemask(ins) != 0xF) {
+ midgard_instruction read =
+ v_load_store_scratch(dest, spill_slot, false, 0xF);
+ mir_insert_instruction_before_scheduled(ctx, block, ins, read);
+ }
+
+ ins->dest = dest;
ins->no_spill |= (1 << spill_class);
midgard_instruction st =