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FFI: Fix FOLD rule for TOBIT + CONV num.u32.

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Thanks to Jiale Zhi.
This commit is contained in:
Mike Pall 2015-03-02 17:31:18 +01:00
parent 5c0e33c2aa
commit 1f578bd424
1 changed files with 8 additions and 3 deletions
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9
src/lj_opt_fold.c
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@ -1006,11 +1006,16 @@ LJFOLDF(simplify_conv_flt_num)
LJFOLD(TOBIT CONV KNUM)
LJFOLDF(simplify_tobit_conv)
{
if ((fleft->op2 & IRCONV_SRCMASK) == IRT_INT ||
(fleft->op2 & IRCONV_SRCMASK) == IRT_U32) {
/* Fold even across PHI to avoid expensive num->int conversions in loop. */
if ((fleft->op2 & IRCONV_SRCMASK) == IRT_INT) {
lua_assert(irt_isnum(fleft->t));
return fleft->op1;
} else if ((fleft->op2 & IRCONV_SRCMASK) == IRT_U32) {
lua_assert(irt_isnum(fleft->t));
fins->o = IR_CONV;
fins->op1 = fleft->op1;
fins->op2 = (IRT_INT<<5)|IRT_U32;
return RETRYFOLD;
}
return NEXTFOLD;
}