[clang] [CIR] Upstream binary assignments and comma (PR #135115)

[Andy Kaylor via cfe-commits]

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@@ -219,6 +219,13 @@ void CIRGenFunction::emitStoreOfScalar(mlir::Value value, Address addr,
   assert(!cir::MissingFeatures::opTBAA());
 }
 
+void CIRGenFunction::emitStoreThroughBitfieldLValue(RValue src, LValue dst,
+                                                    mlir::Value &result) {
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andykaylor wrote:

It's odd that the result is returned in via argument here. Do you know why?

https://github.com/llvm/llvm-project/pull/135115