[llvm] [PPC] Set minimum of largest number of comparisons to use bit test for switch lowering (PR #155910)

[Eli Friedman via llvm-commits]

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@@ -2063,6 +2077,9 @@ class LLVM_ABI TargetLoweringBase {
 
   virtual bool isJumpTableRelative() const;
 
+  /// Retuen the minimum of largest number of comparisons in BitTest.
+  virtual unsigned getMinimumBitTestCmps() const;
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efriedma-quic wrote:

This doesn't need to be virtual if you have a member variable.

```suggestion
  unsigned getMinimumBitTestCmps() const;
```

https://github.com/llvm/llvm-project/pull/155910