Add support for fast isel of inttoptr and ptrtoint in the cases where truncation is not needed.
Add support for fast isel of inttoptr and ptrtoint in the cases where truncation is not needed.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@55399 91177308-0d34-0410-b5e6-96231b3b80d8

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