tree 3f7b845da88ecc38adcc50abba137f9ca97b83e8
parent 1e68ecc4fcce12f683c4fd38acfd1a004001b04f
author Douglas Gregor <dgregor@apple.com> 1325802425 +0000
committer Douglas Gregor <dgregor@apple.com> 1325802425 +0000

When we deserialize a declaration from a module file, allocate extra
storage for the global declaration ID. Declarations that are parsed
(rather than deserialized) are unaffected, so the number of
declarations that pay this cost tends to be relatively small (since
relatively few declarations are ever deserialized).

This replaces a largish DenseMap within the AST reader. It's not
strictly a win in terms of memory use---not every declaration was
added to that DenseMap in the first place---but it's cleaner to have
this information available for every deserialized declaration, so that
future clients can rely on it.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147617 91177308-0d34-0410-b5e6-96231b3b80d8