Cache mapping information for a call site after computing it for a mod/ref query.  If the next mod/ref query happens to be for the same call site (which is extremely likely), use the cache instead of recomputing the callee/caller mapping.  This makes -aa-eval ***MUCH*** faster with ds-aa
Cache mapping information for a call site after computing it for a mod/ref
query.  If the next mod/ref query happens to be for the same call site
(which is extremely likely), use the cache instead of recomputing the
callee/caller mapping.  This makes -aa-eval ***MUCH*** faster with
ds-aa


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@20871 91177308-0d34-0410-b5e6-96231b3b80d8

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