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author | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2019-03-19 10:53:18 -0300 |
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committer | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2019-03-19 10:53:18 -0300 |
commit | 9b37a4695ebf50b37b5b4fb279ae948f23b5b6a0 (patch) | |
tree | 2a6b0f6c1c2eb962bb383175eb0a67ea81a4564d /lopnames.h | |
parent | 1e0c73d5b643707335b06abd2546a83d9439d14c (diff) | |
download | lua-9b37a4695ebf50b37b5b4fb279ae948f23b5b6a0.tar.gz lua-9b37a4695ebf50b37b5b4fb279ae948f23b5b6a0.tar.bz2 lua-9b37a4695ebf50b37b5b4fb279ae948f23b5b6a0.zip |
New semantics for the integer 'for' loop
The numerical 'for' loop over integers now uses a precomputed counter
to control its number of iteractions. This change eliminates several
weird cases caused by overflows (wrap-around) in the control variable.
(It also ensures that every integer loop halts.)
Also, the special opcodes for the usual case of step==1 were removed.
(The new code is already somewhat complex for the usual case,
but efficient.)
Diffstat (limited to 'lopnames.h')
-rw-r--r-- | lopnames.h | 2 |
1 files changed, 0 insertions, 2 deletions
@@ -84,8 +84,6 @@ static const char *const opnames[] = { | |||
84 | "RETURN", | 84 | "RETURN", |
85 | "RETURN0", | 85 | "RETURN0", |
86 | "RETURN1", | 86 | "RETURN1", |
87 | "FORLOOP1", | ||
88 | "FORPREP1", | ||
89 | "FORLOOP", | 87 | "FORLOOP", |
90 | "FORPREP", | 88 | "FORPREP", |
91 | "TFORPREP", | 89 | "TFORPREP", |