[clang] [CIR] Upstream unary not for ComplexType (PR #148857)

[Henrich Lauko via cfe-commits]

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@@ -22,15 +24,68 @@ struct LoweringPreparePass : public LoweringPrepareBase<LoweringPreparePass> {
   void runOnOperation() override;
 
   void runOnOp(Operation *op);
+  void lowerUnaryOp(UnaryOp op);
 };
 
 } // namespace
 
-void LoweringPreparePass::runOnOp(Operation *op) {}
+void LoweringPreparePass::lowerUnaryOp(UnaryOp op) {
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xlauko wrote:

```suggestion
void LoweringPreparePass::lowerUnaryOp(cir::UnaryOp op) {
```

https://github.com/llvm/llvm-project/pull/148857