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Add FOLD rule to reassociate 64 bit (x+k1)+k2.

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Mike Pall 2010-12-08 20:57:21 +01:00
parent 70071241bf
commit f308e00e03
1 changed files with 14 additions and 0 deletions
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14
src/lj_opt_fold.c
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@ -983,6 +983,20 @@ LJFOLDF(reassoc_intarith_k)
return NEXTFOLD;
}
LJFOLD(ADD ADD KINT64)
LJFOLDF(reassoc_intarith_k64)
{
IRIns *irk = IR(fleft->op2);
if (irk->o == IR_KINT64) {
uint64_t k = ir_kint64(irk)->u64 + ir_kint64(fright)->u64;
PHIBARRIER(fleft);
fins->op1 = fleft->op1;
fins->op2 = (IRRef1)lj_ir_kint64(J, k);
return RETRYFOLD; /* (i o k1) o k2 ==> i o (k1 o k2) */
}
return NEXTFOLD;
}
LJFOLD(MIN MIN any)
LJFOLD(MAX MAX any)
LJFOLD(BAND BAND any)