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| author | Kaz Kylheku <kaz@kylheku.com> | 2021-01-26 20:06:15 -0800 |
|---|---|---|
| committer | Kaz Kylheku <kaz@kylheku.com> | 2021-01-26 20:06:15 -0800 |
| commit | 89e094a72f05cbd4d3c5c40f89de13593b7f8e05 (patch) | |
| tree | 41171f24d6282dce42a5072cb48750c1493d8c2a | |
| parent | adf81861f9926512dce338b0d1140d73baf2da5a (diff) | |
| download | txr-89e094a72f05cbd4d3c5c40f89de13593b7f8e05.tar.gz txr-89e094a72f05cbd4d3c5c40f89de13593b7f8e05.tar.bz2 txr-89e094a72f05cbd4d3c5c40f89de13593b7f8e05.zip | |
optimizer: thread ifq instructions also.
* share/txr/stdlib/optimize.tl (basic-blocks thread-jumps): If
an (ifq RX RY label-X) instruction branches to an
(ifq RX RY label-Y) instruction, replace it with that
instruction. Moreover, if (if RX RY label-X) jumps to a
(jmp label-Y) instruction, also replace it with
(if RX RY label-Y).
| -rw-r--r-- | share/txr/stdlib/optimize.tl | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/share/txr/stdlib/optimize.tl b/share/txr/stdlib/optimize.tl index 5cd05095..9cb6ab85 100644 --- a/share/txr/stdlib/optimize.tl +++ b/share/txr/stdlib/optimize.tl @@ -60,6 +60,15 @@ ((@(op eq jlabel) (jmp @(require @jjlabel (neq jjlabel jlabel))) . @nil) ^((if ,reg ,jjlabel) ,*rest)) (@jelse insns)))) + (((ifq @reg @creg @jlabel) . @rest) + (let ((jinsns [bb.hash jlabel])) + (match-case jinsns + ((@(op eq jlabel) (ifq @(op eq reg) @(op eq creg) + @(require @jjlabel (neq jjlabel jlabel))) . @nil) + ^((ifq ,reg ,creg ,jjlabel) ,*rest)) + ((@(op eq jlabel) (jmp @(require @jjlabel (neq jjlabel jlabel))) . @nil) + ^((ifq ,reg ,creg ,jjlabel) ,*rest)) + (@jelse insns)))) (@else insns))) code)))) |