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Fill gaps in frames (caused by metamethod calls) with nil.

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Simplifies storing snapshots to stack.
This commit is contained in:
Mike Pall 2010-01-26 00:45:30 +01:00
parent 47f1bc80d8
commit 34d84f8836
3 changed files with 5 additions and 5 deletions
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4
src/lj_asm.c
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@ -3045,8 +3045,8 @@ static void asm_tail_sync(ASMState *as)
} }
emit_movmroi(as, RID_BASE, ofs+4, irt_toitype(ir->t)); emit_movmroi(as, RID_BASE, ofs+4, irt_toitype(ir->t));
} }
} else if (s > secondbase) { } else {
emit_movmroi(as, RID_BASE, ofs+4, LJ_TNIL); lua_assert(!(s > secondbase));
} }
checkmclim(as); checkmclim(as);
} }

2
src/lj_record.c
View File

@ -426,7 +426,7 @@ static BCReg rec_mm_prep(jit_State *J, ASMFunction cont)
#endif #endif
J->base[top] = emitir(IRTG(IR_FRAME, IRT_PTR), trcont, trcont); J->base[top] = emitir(IRTG(IR_FRAME, IRT_PTR), trcont, trcont);
for (s = J->maxslot; s < top; s++) for (s = J->maxslot; s < top; s++)
J->base[s] = 0; J->base[s] = TREF_NIL;
return top+1; return top+1;
} }

4
src/lj_snap.c
View File

@ -259,8 +259,8 @@ void lj_snap_restore(jit_State *J, void *exptr)
} }
} }
} }
} else if (newbase) { } else {
setnilV(o); /* Clear unreferenced slots of newly added frames. */ lua_assert(!newbase);
} }
} }
if (newbase) L->base = newbase; if (newbase) L->base = newbase;