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Loading will generally extend to an f32 or an 64, so make sure to match those patterns directly to load into the FPR16 register class directly rather than going through the integer GPRs. This also eliminates an extra step in the convert-to-f64 path which was first converting to f32 and then to f64 from there. rdar://17594379 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212573 91177308-0d34-0410-b5e6-96231b3b80d8
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