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better comp-limplify-block

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do not non fall through blocks
This commit is contained in:
Andrea Corallo 2019-10-27 10:24:03 +01:00
parent 45158ed98b
commit 67ac8603ea
1 changed files with 6 additions and 9 deletions
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15
lisp/emacs-lisp/comp.el
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@ -1079,21 +1079,18 @@ The block name is returned."
(comp-func-lap comp-func))
for inst = (car inst-cell)
for next-inst = (car-safe (cdr inst-cell))
for fall-through = (comp-lap-fall-through-p inst)
do (comp-limplify-lap-inst inst)
(cl-incf (comp-limplify-pc comp-pass))
(pcase next-inst
when (comp-lap-fall-through-p inst)
do (pcase next-inst
(`(TAG ,_label . ,label-sp)
(when (and label-sp fall-through)
(when label-sp
(cl-assert (= (1- label-sp) (comp-sp))))
(let* ((stack-depth (if label-sp
(1- label-sp)
(if fall-through
(comp-sp)
(error "Unknown stack depth."))))
(next-bb (comp-add-pending-block stack-depth)))
(when (and fall-through
(not (comp-block-closed bb)))
(comp-sp)))
(next-bb (comp-add-pending-block stack-depth)))
(unless (comp-block-closed bb)
(comp-emit `(jump ,next-bb))))
(cl-return)))
until (comp-lap-eob-p inst)))