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Author SHA1 Message Date
Richard Sandiford 37cd6cfba2 Turn MipsOptimizeMathLibCalls into a target-independent scalar transform 
...so that it can be used for z too.  Most of the code is the same.
The only real change is to use TargetTransformInfo to test when a sqrt
instruction is available.

The pass is opt-in because at the moment it only handles sqrt.

llvm-svn: 189097
 2013-08-23 10:27:02 +00:00