[llvm] [CodeGen] Avoid sinking vector comparisons during CodeGenPrepare (PR #113158)

[David Sherwood via llvm-commits]

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@@ -502,6 +502,11 @@ class TargetLoweringBase {
     return HasMultipleConditionRegisters;
   }
 
+  /// Return true if multiple vector predicate registers are available.
+  bool hasMultipleVectorPredicateRegisters() const {
+    return HasMultipleVectorPredicateRegisters;
+  }
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david-arm wrote:

OK, I've added an extra EVT argument because if I understood you correctly from your other comment you'd prefer me to have a single function called from both `shouldNormalizeToSelectSequence` and `sinkCmpExpression`. In this case `shouldNormalizeToSelectSequence` is in DAGCombiner and works with EVTs rather than Types.

https://github.com/llvm/llvm-project/pull/113158