jdelong
9dc66f2f40
I think the only case where we currently don't spillstack as part of a vector translation is CGetM of a defined property. However, this can still raise exceptions in the unlikely case of an unset property. For now, just spill before any vector translation---a follow up diff relaxes this to not do it in cases where we know the property can't be undefined. Presumably later we'll push the spillstacks into the unlikely paths for these translations (or put them in unwind handlers)---currently we can't handle control flow where the join point has a different stack.
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