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Fix simplify_numsub_k

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This commit is contained in:
XmiliaH 2021-12-17 11:44:42 +01:00
parent f3c856915b
commit 3140d64ad7
1 changed files with 9 additions and 2 deletions
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11
src/lj_opt_fold.c
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@ -1038,8 +1038,15 @@ LJFOLD(SUB any KNUM)
LJFOLDF(simplify_numsub_k)
{
lua_Number n = knumright;
if (n == 0.0) /* x - (+-0) ==> x */
return LEFTFOLD;
if (n == 0.0) {
/* x - (+0) ==> x */
if (!signbit(n))
return LEFTFOLD;
/* x - (-0) ==> x + 0 */
/* Note: x + 0 != x for x = -0 */
fins->o = IR_ADD;
fins->op2 = (IRRef1)lj_ir_knum(J, 0.0);
}
return NEXTFOLD;
}