1. Avoid unnecessary APInt construction if possible. 2. Use isStrictlyPositive() instead of isPositive() in two places where    they need APInt value > 0 not only >=0.
1. Avoid unnecessary APInt construction if possible.
2. Use isStrictlyPositive() instead of isPositive() in two places where
   they need APInt value > 0 not only >=0.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@35333 91177308-0d34-0410-b5e6-96231b3b80d8

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