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Rename: NoUnrolling to InterleaveOnlyWhenForced and AlwaysVectorize to !VectorizeOnlyWhenForced Contrary to what the name 'AlwaysVectorize' suggests, it does not unconditionally vectorize all loops, but applies a cost model to determine whether vectorization is profitable to all loops. Hence, passing false will disable the cost model, except when a loop is marked with llvm.loop.vectorize.enable. The 'OnlyWhenForced' suffix (suggested by @hfinkel in D55716) better matches this behavior. Similarly, 'NoUnrolling' disables the profitability cost model for interleaving (a term to distinguish it from unrolling by the LoopUnrollPass); rename it for consistency. Differential Revision: https://reviews.llvm.org/D55785 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@349513 91177308-0d34-0410-b5e6-96231b3b80d8