[llvm] [LV] Remove common extends and selects in CSE (PR #147731)

[Sander de Smalen via llvm-commits]

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@@ -804,6 +804,10 @@ int FunctionComparator::cmpOperations(const Instruction *L,
         return Res;
     }
   }
+  if (const CastInst *Cast = dyn_cast<CastInst>(L)) {
+    const CastInst *CastR = cast<CastInst>(R);
+    return cmpTypes(Cast->getDestTy(), CastR->getDestTy());
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sdesmalen-arm wrote:

@SamTebbs33 do we need a separate test for the FunctionComparator change? (I don't think that's currently tested?)

https://github.com/llvm/llvm-project/pull/147731