diff options
Diffstat (limited to 'share/txr/stdlib/optimize.tl')
| -rw-r--r-- | share/txr/stdlib/optimize.tl | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/share/txr/stdlib/optimize.tl b/share/txr/stdlib/optimize.tl index a2054ca3..fcaece3b 100644 --- a/share/txr/stdlib/optimize.tl +++ b/share/txr/stdlib/optimize.tl @@ -37,8 +37,9 @@ links insns) - (defstruct (basic-blocks insns) nil + (defstruct (basic-blocks insns lt-dregs) nil insns + lt-dregs root (hash (hash)) (li-hash (hash :eq-based)) @@ -257,7 +258,9 @@ (while* (nequal ninsn insn) (set insn ninsn ninsn (match-case insn - ((if (d @reg) @jlabel) nil) + (@(require (if @(as reg (d @reg)) @jlabel) + (not (memqual reg bb.lt-dregs))) + nil) ((if (t 0) @jlabel) ^(jmp ,jlabel)) ((jmp @jlabel) |