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Matthew Flatt 7bcc9afd4c adjust required-keyword expansion to improve optimization
Make the definition of a function with a required keyword expand in a
way that allows the optimizer to recognize it as a form that has no
errors or externally visible side effects.

The old expansion of

 (define (f #:x x) ...)

included

 (define lifted-constructor (make-required ....))
 (define f (lifted-constructor (lambda ....) ....))

where `make-required` calls `make-struct-type` and returns just the
constructor.

The new expansion instead has

 (define-values (_ lifted-constructor _ _ _)
   (make-struct-type ....))
 (define f (lifted-constructor (lambda ....) ....))

In other words, `make-required` is inlined by macro expansion,
so that the optimizer will be able to see it and eventually
conclude that no side effects have taken place.
2016-08-07 14:25:27 -06:00
pkgs fix syntax-local-lift-values-expression 2016-08-07 14:22:35 -06:00
racket adjust required-keyword expansion to improve optimization 2016-08-07 14:25:27 -06:00
.gitattributes Don't include git files in archives. 2010-05-12 01:46:05 -04:00
.gitignore Add *.orig, *.rej and *.core files to gitignore. 2015-11-06 10:25:13 -06:00
.mailmap mailmap updates & fixes. 2013-04-03 18:10:22 -04:00
.travis.yml Fix CI tests for match test move. 2015-12-30 10:39:45 -05:00
appveyor.yml Fix CI tests for match test move. 2015-12-30 10:39:45 -05:00
INSTALL.txt Corrected a few typos in INSTALL.txt 2016-06-02 13:39:39 -05:00
Makefile Moved xrepl to be part of bootloader directly. 2016-07-26 10:14:38 -04:00
README.md Add info to README. 2016-07-13 10:38:54 -04:00

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