[llvm] [LV] Use frozen start value for FindLastIV if needed. (PR #132691)

[David Sherwood via llvm-commits]

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@@ -474,6 +475,12 @@ Value *VPInstruction::generate(VPTransformState &State) {
     Value *Idx = State.get(getOperand(1), /*IsScalar=*/true);
     return Builder.CreateExtractElement(Vec, Idx, Name);
   }
+  case Instruction::Freeze: {
+    if (State.hasVectorValue(this))
+      return State.get(this);
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david-arm wrote:

Will we still generate a freeze instruction if we have a vector value?

https://github.com/llvm/llvm-project/pull/132691