[llvm] [VPlan] Move predication to VPlanTransform (NFC). (PR #128420)

[via llvm-commits]

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@@ -9442,43 +9232,32 @@ LoopVectorizationPlanner::tryToBuildVPlanWithVPRecipes(VFRange &Range,
   }
 
   // ---------------------------------------------------------------------------
-  // Construct recipes for the instructions in the loop
+  // Predicate and linearize the top-level loop region.
   // ---------------------------------------------------------------------------
+  DenseMap<VPBasicBlock *, VPValue *> BlockMaskCache;
+  VPlanTransforms::predicateAndLinearize(*Plan, CM.foldTailByMasking(),
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ayalz wrote:

Perhaps more accurately `introduceMasksAndLinearize()`, as predicating instructions is done afterwards? Can also provide BlockMaskCache as return value.

https://github.com/llvm/llvm-project/pull/128420