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| author | Mattias Engdegård <mattiase@acm.org> | 2021-07-29 10:07:26 +0200 |
|---|---|---|
| committer | Mattias Engdegård <mattiase@acm.org> | 2021-07-30 09:54:29 +0200 |
| commit | dc9e2a1749c892cdf52a01414bee97e9a2245ca5 (patch) | |
| tree | a9b13c9ca71f5b5d5f10891e2bd17cdd589cddb0 /lisp/emacs-lisp/crm.el | |
| parent | 9a6333811441a32e49bfd33c14f77680402cd639 (diff) | |
| download | emacs-dc9e2a1749c892cdf52a01414bee97e9a2245ca5.tar.gz emacs-dc9e2a1749c892cdf52a01414bee97e9a2245ca5.tar.bz2 emacs-dc9e2a1749c892cdf52a01414bee97e9a2245ca5.zip | |
Optimise prog1 better
Rewrite (prog1 CONST FORMS...) => (progn FORMS... CONST)
where CONST is a compile-time constant, because putting the value last
allows the lapcode peephole pass to do important improvements like
branch elimination. Also use progn instead of prog1 for `ignore`.
* lisp/emacs-lisp/byte-opt.el (byte-optimize-form-code-walker):
New `prog1` and `ignore` transforms.
Diffstat (limited to 'lisp/emacs-lisp/crm.el')
0 files changed, 0 insertions, 0 deletions