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5540570374
This patch improves the performance of vector creation in caseiswhere where several of the lanes in the vector are a constant floating point value. It also includes new patterns to fold together some of the instructions when the value is 0.0f. Test cases included. rdar://16349427 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206496 91177308-0d34-0410-b5e6-96231b3b80d8
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