(when (block-start next) ; NEXT is not an END-OF-COMPONENT marker
(cond ( ;; We cannot combine with a successor block if:
(or
- ;; The successor has more than one predecessor.
+ ;; the successor has more than one predecessor;
(rest (block-pred next))
- ;; The successor is the current block (infinite loop).
+ ;; the successor is the current block (infinite loop);
(eq next block)
- ;; The next block has a different cleanup, and thus
+ ;; the next block has a different cleanup, and thus
;; we may want to insert cleanup code between the
- ;; two blocks at some point.
+ ;; two blocks at some point;
(not (eq (block-end-cleanup block)
(block-start-cleanup next)))
- ;; The next block has a different home lambda, and
+ ;; the next block has a different home lambda, and
;; thus the control transfer is a non-local exit.
(not (eq (block-home-lambda block)
- (block-home-lambda next))))
+ (block-home-lambda next)))
+ ;; Stack analysis phase wants ENTRY to start a block.
+ (entry-p (block-start-node next)))
nil)
(t
(join-blocks block next)