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Emit sunk IR_NEWREF only once per key on snapshot replay.

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Thanks to Sergey Kaplun and Peter Cawley. #1128
This commit is contained in:
Mike Pall 2023-12-10 14:29:45 +01:00
parent 644723649e
commit 1761fd2ef7
1 changed files with 12 additions and 0 deletions
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12
src/lj_snap.c
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@ -575,9 +575,21 @@ void lj_snap_replay(jit_State *J, GCtrace *T)
if (irr->o == IR_HREFK || irr->o == IR_AREF) { if (irr->o == IR_HREFK || irr->o == IR_AREF) {
IRIns *irf = &T->ir[irr->op1]; IRIns *irf = &T->ir[irr->op1];
tmp = emitir(irf->ot, tmp, irf->op2); tmp = emitir(irf->ot, tmp, irf->op2);
} else if (irr->o == IR_NEWREF) {
IRRef allocref = tref_ref(tr);
IRRef keyref = tref_ref(key);
IRRef newref_ref = J->chain[IR_NEWREF];
IRIns *newref = &J->cur.ir[newref_ref];
lua_assert(irref_isk(keyref));
if (newref_ref > allocref && newref->op2 == keyref) {
lua_assert(newref->op1 == allocref);
tmp = newref_ref;
goto skip_newref;
}
} }
} }
tmp = emitir(irr->ot, tmp, key); tmp = emitir(irr->ot, tmp, key);
skip_newref:
val = snap_pref(J, T, map, nent, seen, irs->op2); val = snap_pref(J, T, map, nent, seen, irs->op2);
if (val == 0) { if (val == 0) {
IRIns *irc = &T->ir[irs->op2]; IRIns *irc = &T->ir[irs->op2];