[PATCH] D13690: Silence MSVC warning D9025 when /W3 present after /W4

[Saleem Abdulrasool via llvm-commits]

compnerd added a comment.

This would avoid that issue at the cost of preventing the user from specifying an alternative flag via the command line.  Is there a good reason to disallow that?


http://reviews.llvm.org/D13690