[clang] [CIR] Implement LValueBitcast for ComplexType (PR #150668)

[Andy Kaylor via cfe-commits]

================
@@ -923,4 +923,129 @@ CIRGenFunction::emitArrayLength(const clang::ArrayType *origArrayType,
   return builder.getConstInt(*currSrcLoc, SizeTy, countFromCLAs);
 }
 
+// TODO(cir): most part of this function can be shared between CIRGen
----------------
andykaylor wrote:

```suggestion
// TODO(cir): Most of this function can be shared between CIRGen
```

https://github.com/llvm/llvm-project/pull/150668