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Drop frame clearing in exit handling and JIT compiled code.

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This commit is contained in:
Mike Pall
2010-02-11 01:50:32 +01:00
parent ab90b8fc2b
commit 565eb39574
2 changed files with 1 additions and 21 deletions
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18
src/lj_asm.c
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@@ -3043,8 +3043,7 @@ static void asm_tail_sync(ASMState *as)
MSize n, nent = snap->nent;
SnapEntry *map = &as->T->snapmap[snap->mapofs];
SnapEntry *flinks = map + nent + 1;
BCReg newbase = 0;
BCReg nslots, topslot = 0;
BCReg newbase = 0, topslot = 0;
checkmclim(as);
ra_allocref(as, REF_BASE, RID2RSET(RID_BASE));
@@ -3076,21 +3075,6 @@ static void asm_tail_sync(ASMState *as)
emit_addptr(as, RID_BASE, 8*(int32_t)newbase);
/* Clear stack slots of newly added frames. */
nslots = snap->nslots;
if (nslots <= topslot) {
if (nslots < topslot) {
BCReg s;
for (s = nslots; s <= topslot; s++) {
emit_movtomro(as, RID_EAX, RID_BASE, 8*((int32_t)s-1)+4);
checkmclim(as);
}
emit_loadi(as, RID_EAX, LJ_TNIL);
} else {
emit_movmroi(as, RID_BASE, 8*((int32_t)nslots-1)+4, LJ_TNIL);
}
}
/* Store the value of all modified slots to the Lua stack. */
for (n = 0; n < nent; n++) {
SnapEntry sn = map[n];