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Add missing FOLD rule for 64 bit shift+BAND simplification.

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Mike Pall 2016-12-08 22:38:35 +01:00
parent 986854cbb2
commit ec2756ba78
1 changed files with 13 additions and 0 deletions
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13
src/lj_opt_fold.c
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@ -347,6 +347,11 @@ static uint64_t kfold_int64arith(uint64_t k1, uint64_t k2, IROp op)
case IR_BAND: k1 &= k2; break;
case IR_BOR: k1 |= k2; break;
case IR_BXOR: k1 ^= k2; break;
case IR_BSHL: k1 <<= (k2 & 63); break;
case IR_BSHR: k1 = (int32_t)((uint32_t)k1 >> (k2 & 63)); break;
case IR_BSAR: k1 >>= (k2 & 63); break;
case IR_BROL: k1 = (int32_t)lj_rol((uint32_t)k1, (k2 & 63)); break;
case IR_BROR: k1 = (int32_t)lj_ror((uint32_t)k1, (k2 & 63)); break;
#endif
default: UNUSED(k2); lua_assert(0); break;
}
@ -1653,6 +1658,14 @@ LJFOLDF(simplify_shiftk_andk)
fins->op2 = (IRRef1)lj_ir_kint(J, k);
fins->ot = IRTI(IR_BAND);
return RETRYFOLD;
} else if (irk->o == IR_KINT64) {
uint64_t k = kfold_int64arith(ir_k64(irk)->u64, fright->i, (IROp)fins->o);
IROpT ot = fleft->ot;
fins->op1 = fleft->op1;
fins->op1 = (IRRef1)lj_opt_fold(J);
fins->op2 = (IRRef1)lj_ir_kint64(J, k);
fins->ot = ot;
return RETRYFOLD;
}
return NEXTFOLD;
}