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Optimize table length computation with hinting.

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10x faster on loop with t[#t+1] = x idiom. Also used by table.insert.
This commit is contained in:
Mike Pall
2020-05-27 19:20:44 +02:00
parent b2307c8ad8
commit 1a4ff13117
12 changed files with 135 additions and 82 deletions
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4
src/lj_opt_fold.c
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@@ -2132,8 +2132,8 @@ LJFOLDX(lj_opt_fwd_hload)
LJFOLD(ULOAD any)
LJFOLDX(lj_opt_fwd_uload)
LJFOLD(CALLL any IRCALL_lj_tab_len)
LJFOLDX(lj_opt_fwd_tab_len)
LJFOLD(ALEN any any)
LJFOLDX(lj_opt_fwd_alen)
/* Upvalue refs are really loads, but there are no corresponding stores.
** So CSE is ok for them, except for UREFO across a GC step (see below).