[clang] [flang] [llvm] [OpenMPIRBuilder] Emit __atomic_load and __atomic_compare_exchange libcalls for complex types in atomic update (PR #92364)

[Michael Kruse via cfe-commits]

================
@@ -6033,6 +6034,52 @@ std::pair<Value *, Value *> 
OpenMPIRBuilder::emitAtomicUpdate(
       Res.second = Res.first;
     else
       Res.second = emitRMWOpAsInstruction(Res.first, Expr, RMWOp);
+  } else if (RMWOp == llvm::AtomicRMWInst::BinOp::BAD_BINOP) {
----------------
Meinersbur wrote:

`BAD_BINOP`? Doesn't this implement `BinOp::Xchg`?

https://github.com/llvm/llvm-project/pull/92364
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