[PATCH] D78271: [TLI][PowerPC] Introduce TLI query to check if MULH is cheaper than MUL + SHIFT

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: llvm/include/llvm/CodeGen/TargetLowering.h:1662
+  /// a multiply followed by a shift. This is false by default.
+  virtual bool isMulhCheaperThanMulShift(EVT Type) const { return false; }
+
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If we add X86/SSE support we might need a IsSigned flag but unless PPC have a use case right now I don't think this needs to be added yet.


Repository:
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  https://reviews.llvm.org/D78271/new/

https://reviews.llvm.org/D78271