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Qiu Chaofan
3d8ed5a845
[DAGCombiner] Improve division estimation of floating points.
Current implementation of estimating divisions loses precision since it estimates reciprocal first and does multiplication. This patch is to re-order arithmetic operations in the last iteration in DAGCombiner to improve the accuracy. Reviewed By: Sanjay Patel, Jinsong Ji Differential Revision: https://reviews.llvm.org/D66050 llvm-svn: 371713
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