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Fix snapshot #0 handling for traces with a stack check on entry.

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Mike Pall 2014-11-28 20:20:12 +01:00
parent a31c317fb5
commit c75c62b489
1 changed files with 5 additions and 0 deletions
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5
src/lj_asm.c
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@ -1373,6 +1373,11 @@ static void asm_head_side(ASMState *as)
int pass3 = 0;
IRRef i;
if (as->snapno && as->topslot > as->parent->topslot) {
/* Force snap #0 alloc to prevent register overwrite in stack check. */
as->snapno = 0;
asm_snap_alloc(as);
}
allow = asm_head_side_base(as, irp, allow);
/* Scan all parent SLOADs and collect register dependencies. */