[LVI] Complete the abstract of the cache layer [NFCI]
Convert the previous introduced is-a relationship between the LVICache and LVIImple clases into a has-a relationship and hide all the implementation details of the cache from the lazy query layer.
The only slightly concerning change here is removing the addition of a queried block into the SeenBlock set in LVIImpl::getBlockValue. As far as I can tell, this was effectively dead code. I think it *used* to be the case that getCachedValueInfo wasn't const and might end up inserting elements in the cache during lookup. That's no longer true and hasn't been for a while. I did fixup the const usage to make that more obvious.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@281272 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed