[PATCH] D17781: Codegen: [PPC] Word Rotates are Zero Extending

[Hal Finkel via llvm-commits]

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I don't think this is right. RLWINM starts by taking two copies of the 32-bit amount, one copy in the lower word and one copy in the upper word and rotates the result, Then it composes the mask. The mask is non-zero in the upper bits if MB >= ME.


Repository:
  rL LLVM

http://reviews.llvm.org/D17781