[clang] [CIR] Upstream LValue Unary Inc & Dec for ComplexType (PR #160201)

[Andy Kaylor via cfe-commits]

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@@ -913,8 +913,7 @@ LValue CIRGenFunction::emitUnaryOpLValue(const UnaryOperator *e) {
     assert(e->isPrefix() && "Prefix operator in unexpected state!");
 
     if (e->getType()->isAnyComplexType()) {
-      cgm.errorNYI(e->getSourceRange(), "UnaryOp complex inc/dec");
-      lv = LValue();
+      emitComplexPrePostIncDec(e, lv, kind, true /*isPre=*/);
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andykaylor wrote:

```suggestion
      emitComplexPrePostIncDec(e, lv, kind, /*isPre=*/true);
```

https://github.com/llvm/llvm-project/pull/160201