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In the generic for loop, it is simpler for OP_TFORLOOP to use the
same 'ra' as OP_TFORCALL. Moreover, the internal names of the loop
temporaries "(for ...)" don't need to leak internal details (even
because the numerical for loop doesn't have a fixed role for each of
its temporaries).
This commit is contained in:
Roberto Ierusalimschy
2019-07-10 14:58:31 -03:00
parent 3d296304ef
commit be8445d7e4
3 changed files with 13 additions and 13 deletions
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13
lparser.c
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@@ -1527,7 +1527,6 @@ static void forbody (LexState *ls, int base, int line, int nvars, int isgen) {
if (isgen) { /* generic for? */
luaK_codeABC(fs, OP_TFORCALL, base, 0, nvars);
luaK_fixline(fs, line);
base += 2; /* base for 'OP_TFORLOOP' (skips function and state) */
}
endfor = luaK_codeABx(fs, forloop[isgen], base, 0);
fixforjump(fs, endfor, prep + 1, 1);
@@ -1539,9 +1538,9 @@ static void fornum (LexState *ls, TString *varname, int line) {
/* fornum -> NAME = exp,exp[,exp] forbody */
FuncState *fs = ls->fs;
int base = fs->freereg;
new_localvarliteral(ls, "(for index)");
new_localvarliteral(ls, "(for limit)");
new_localvarliteral(ls, "(for step)");
new_localvarliteral(ls, "(for state)");
new_localvarliteral(ls, "(for state)");
new_localvarliteral(ls, "(for state)");
new_localvar(ls, varname);
checknext(ls, '=');
exp1(ls); /* initial value */
@@ -1566,10 +1565,10 @@ static void forlist (LexState *ls, TString *indexname) {
int line;
int base = fs->freereg;
/* create control variables */
new_localvarliteral(ls, "(for generator)");
new_localvarliteral(ls, "(for state)");
new_localvarliteral(ls, "(for control)");
new_localvarliteral(ls, "(for toclose)");
new_localvarliteral(ls, "(for state)");
new_localvarliteral(ls, "(for state)");
new_localvarliteral(ls, "(for state)");
/* create declared variables */
new_localvar(ls, indexname);
while (testnext(ls, ',')) {