[PATCH] Use rsqrt (X86) to speed up reciprocal square root calcs (PR20900)

Sanjay Patel spatel at rotateright.com
Fri Oct 24 10:14:56 PDT 2014

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Thanks, Andrea and Hal. Checked in with r220570.

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D5658

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