master: Lower more things to from EQUALP to EQUAL

stassats via Sbcl-commits <[email protected]>
Newsgroups gmane.lisp.steel-bank.cvs
Message-ID <[email protected]>
The branch "master" has been updated in SBCL:
       via  c1f893b2dff39b06ba7df00ba4f1f812ebdb05f3 (commit)
      from  ce88d7209f22005baaa28ea2e8e7fbd96ee0da13 (commit)

- Log -----------------------------------------------------------------
commit c1f893b2dff39b06ba7df00ba4f1f812ebdb05f3
Author: Stas Boukarev <[email protected]>
Date:   Wed Apr 8 20:45:07 2026 +0300

    Lower more things to from EQUALP to EQUAL
    
    Characters and strings without case
---
 src/compiler/srctran.lisp | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/src/compiler/srctran.lisp b/src/compiler/srctran.lisp
index fba418568..aa6331272 100644
--- a/src/compiler/srctran.lisp
+++ b/src/compiler/srctran.lisp
@@ -6961,11 +6961,22 @@
                                ,y)
                               (eq (car ,y) ',(car value))
                               (eq (cdr ,y) ',(cdr value))))
-                       ((and (proper-or-dotted-list-p value)
-                             (let ((cdr value))
-                               (and (loop while (consp cdr)
-                                          always (symbolp (pop cdr)))
-                                    (symbolp cdr))))
+                       ((or
+                         ;; (equalp string "123") => equal
+                         (and (stringp value)
+                              (notany #'both-case-p value)
+                              (csubtypep (type-intersection y-type (specifier-type 'vector))
+                                         (specifier-type 'string)))
+                         ;; (equalp x '(symbol #\0)) => equal
+                         (labels ((equal-comparison-p (x)
+                                    (or (symbolp x)
+                                        (and (characterp x)
+                                             (not (both-case-p x))))))
+                           (and (proper-or-dotted-list-p value)
+                                (let ((cdr value))
+                                  (and (loop while (consp cdr)
+                                             always (equal-comparison-p (pop cdr)))
+                                       (equal-comparison-p cdr))))))
                         `(equal x y))))))
            ;; (equalp x (list y))
            ;; (equalp x (cons car cdr))

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