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Optimize table.new() with constant args to (sinkable) IR_TNEW.

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Thanks to Peter Cawley. #1128
This commit is contained in:
Mike Pall 2023-12-10 14:41:56 +01:00
parent 7ad68a1fd3
commit d1236a4caa
1 changed files with 9 additions and 0 deletions
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9
src/lj_ffrecord.c
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@ -1444,6 +1444,15 @@ static void LJ_FASTCALL recff_table_new(jit_State *J, RecordFFData *rd)
{
TRef tra = lj_opt_narrow_toint(J, J->base[0]);
TRef trh = lj_opt_narrow_toint(J, J->base[1]);
if (tref_isk(tra) && tref_isk(trh)) {
int32_t a = IR(tref_ref(tra))->i;
if (a < 0x7fff) {
uint32_t hbits = hsize2hbits(IR(tref_ref(trh))->i);
a = a > 0 ? a+1 : 0;
J->base[0] = emitir(IRTG(IR_TNEW, IRT_TAB), (uint32_t)a, hbits);
return;
}
}
J->base[0] = lj_ir_call(J, IRCALL_lj_tab_new_ah, tra, trh);
UNUSED(rd);
}