mirror/guile
mirror/guile
1
Fork 0
mirror of https://git.savannah.gnu.org/git/guile.git synced 2025-06-18 01:30:27 +02:00
Code Activity

Fix closure-conversion bug for SCC with all free vars pruned

Browse source 
* module/language/cps/closure-conversion.scm (convert-one): Fix bug when
getting value of SCC whose free variables have been elided.  Thanks to
abcdw for the report!
* test-suite/tests/compiler.test ("cse auxiliary definitions"): Remove
spurious newline.
("closure conversion"): New test.
This commit is contained in:
Andy Wingo 2021-04-27 14:51:38 +02:00
parent 534dd35a3c
commit 12fa7d115d
2 changed files with 44 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

16
module/language/cps/closure-conversion.scm
View file

@ -504,11 +504,17 @@ Otherwise @var{var} is bound, so @var{k} is called with @var{var}."
;; A not-well-known function with zero free vars. Copy as a
;; constant, relying on the linker to reify just one copy.
=> (lambda (kfun)
(with-cps cps
(letv var*)
(let$ body (k var*))
(letk k* ($kargs (#f) (var*) ,body))
(build-term ($continue k* #f ($const-fun kfun))))))
;; It may well be that "var" is the "self" of another
;; member of an SCC containing just one not-well-known
;; function. But here we're asking for the value of the
;; closure, which is the $const-fun of the non-well-known
;; member.
(let ((kfun (closure-label kfun shared bound->label)))
(with-cps cps
(letv var*)
(let$ body (k var*))
(letk k* ($kargs (#f) (var*) ,body))
(build-term ($continue k* #f ($const-fun kfun)))))))
((intset-ref free var)
(if (and self-known? (eqv? 1 nfree))
;; A reference to the one free var of a well-known function.