[llvm] [LV][EVL] Support cast instruction with EVL-vectorization (PR #108351)

[via llvm-commits]

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@@ -1381,16 +1384,73 @@ void VPWidenCastRecipe::execute(VPTransformState &State) {
   }
 }
 
+static bool isCastInstruction(unsigned Opcode) {
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LiqinWeng wrote:

done~

https://github.com/llvm/llvm-project/pull/108351