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770e106ed6
This patch teaches the backend how to expand a double-half conversion into a double-float conversion immediately followed by a float-half conversion. We do this only under fast-math, and if float-half conversions are legal for the target. Added test CodeGen/X86/fastmath-float-half-conversion.ll Differential Revision: http://reviews.llvm.org/D7832 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230276 91177308-0d34-0410-b5e6-96231b3b80d8