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Summary: Set operation action for FP16 conversion opcodes, so the Op legalizer can choose the gnu_* libcalls for Mips. Set LoadExtAction and TruncStoreAction for f16 scalars and vectors to prevent (fpext (load )) and (store (fptrunc)) from getting combined into unsupported operations. Added test cases to test that these operations are handled correctly for f16 scalars and vectors. This patch depends on http://reviews.llvm.org/D8755. Reviewers: srhines Subscribers: llvm-commits, ab Differential Revision: http://reviews.llvm.org/D8804 llvm-svn: 235341
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