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| author | Kaz Kylheku <kaz@kylheku.com> | 2021-02-18 07:46:11 -0800 |
|---|---|---|
| committer | Kaz Kylheku <kaz@kylheku.com> | 2021-02-18 07:46:11 -0800 |
| commit | 6bd89e9123a78f60fa88f7683f24e2853510b8b8 (patch) | |
| tree | 0221e4a08d3e281cedb51d2fbb42be706c5171db | |
| parent | 6f386f9072155e0fd9013bb2116c04de46651acd (diff) | |
| download | txr-6bd89e9123a78f60fa88f7683f24e2853510b8b8.tar.gz txr-6bd89e9123a78f60fa88f7683f24e2853510b8b8.tar.bz2 txr-6bd89e9123a78f60fa88f7683f24e2853510b8b8.zip | |
compiler: reduce (not (eq ...)) and related exprs.
* share/txr/stdlib/compiler.tl (compiler comp-fun-form):
Reduce negated eq, eql, equal to neq, neql, nequal.
| -rw-r--r-- | share/txr/stdlib/compiler.tl | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/share/txr/stdlib/compiler.tl b/share/txr/stdlib/compiler.tl index 4b3ee0df..ebc2bda3 100644 --- a/share/txr/stdlib/compiler.tl +++ b/share/txr/stdlib/compiler.tl @@ -1161,6 +1161,9 @@ ((or (eql-comparable a) (eql-comparable b)) (set form ^(eql ,a ,b))))) + ((not (@(and @(or eq eql equal) @op) @a @b)) + (let ((nop (caseq op (eq 'neq) (eql 'neql) (equal 'nequal)))) + (return-from comp-fun-form me.(compile oreg env ^(,nop ,a ,b))))) ((@(or append cons list list*) . @args) (set form (reduce-lisp form))) ((@(@bin [%bin-op% @sym]) @a @b) |