(compile nil `(lambda (x)
(symbol-macrolet ((sv x))
(values (svref sv 0) (setf (svref sv 0) 99))))))
+
+;; The compiler used to update the receiving LVAR's type too
+;; aggressively when converting a large constant to a smaller
+;; (potentially signed) one, causing other branches to be
+;; inferred as dead.
+(with-test (:name :modular-cut-constant-to-width)
+ (let ((test (compile nil
+ `(lambda (x)
+ (logand 254
+ (case x
+ ((3) x)
+ ((2 2 0 -2 -1 2) 9223372036854775803)
+ (t 358458651)))))))
+ (assert (= (funcall test -10470605025) 26))))
+
+(with-test (:name :append-type-derivation)
+ (let ((test-cases
+ '((lambda () (append 10)) (integer 10 10)
+ (lambda () (append nil 10)) (integer 10 10)
+ (lambda (x) (append x 10)) t
+ (lambda (x) (append x (cons 1 2))) cons
+ (lambda (x y) (append x (cons 1 2) y)) cons
+ (lambda (x y) (nconc x (the list y) x)) t
+ (lambda (x y) (print (length y)) (append x y)) sequence)))
+ (loop for (function result-type) on test-cases by #'cddr
+ do (assert (equal (car (cdaddr (sb-kernel:%simple-fun-type
+ (compile nil function))))
+ result-type)))))