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the legalization cost must be included to get an accurate estimation of the total cost of the scalarized vector. The inaccurate cost triggered unprofitable SLP vectorization on 32-bit X86. Summary: Include legalization overhead when computing scalarization cost Reviewers: hfinkel, nadav CC: chandlerc, rnk, llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D2992 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203509 91177308-0d34-0410-b5e6-96231b3b80d8
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