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authorMattias EngdegÄrd <mattiase@acm.org>2022-12-16 15:56:04 +0100
committerMattias EngdegÄrd <mattiase@acm.org>2022-12-16 19:18:34 +0100
commit6283b9233459d74f95e9b0300f025a49f9674fb9 (patch)
treee252e8cb4228b1321d59e14b3cbbac8980d5f694 /test/lisp/emacs-lisp/syntax-tests.el
parent30d2b72c4124b351026a8a5420686d5dc04ecc61 (diff)
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Elide broken but unnecessary `if` optimisations
* lisp/emacs-lisp/byte-opt.el (byte-optimize-if): Remove explicit clauses purposing to simplify (if X nil t) -> (not X) (if X t nil) -> (not (not X)) but never did so because of a coding mistake (eq instead of equal), found by a recently added warning. They weren't actually needed thanks to the optimiser's fixpoint iteration: we eventually get the same results through (if X nil t) -> (if (not X) t nil) -> (if (not X) t) -> (not X) (if X t nil) -> (if X t) -> (not (not X))
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