Add back cache invalidation to basic_blocks_and_local_decls_mut
Add back cache invalidation to basic_blocks_and_local_decls_mut

graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust