mozilla/rust — pull request #9723 by blake2-ppc (2013-10-04 23:15:22+00:00)
Title: Avoid cloning the stack on every `push_ctxt` call in trans

Avoid cloning the stack on every `push_ctxt` call in trans

Rewrite the use of TLS variable for `push_ctxt` so that it uses a ~[]
instead of a @~[]. Before it cloned the whole vector on each push and
pop, which is unnecessary.