[PATCH] D25333: [LV] Avoid rounding errors for predicated instruction costs

[Matthew Simpson via llvm-commits]

mssimpso added inline comments.


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Comment at: lib/Transforms/Vectorize/LoopVectorize.cpp:6528
+      // models a copy at the end of each predicated block.
+      auto PhiCost = VF * TTI.getCFInstrCost(Instruction::PHI);
+
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gilr wrote:
> Not sure the use of "auto" instead of "unsigned" adheres to [[ http://llvm.org/docs/CodingStandards.html#use-auto-type-deduction-to-make-code-more-readable | the coding guidelines for auto ]].
Good point, I'll make this explicit. Thanks, Gil!


https://reviews.llvm.org/D25333