[clang] [clang] Fixed a crash when explicitly casting to atomic complex (PR #172163)

[Eli Friedman via cfe-commits]

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@@ -1235,7 +1241,7 @@ LValue ComplexExprEmitter::EmitCompoundAssignLValue(
                        E->getComputationResultType(), IsComplexDivisor);
   if (PromotionTypeCR.isNull())
     PromotionTypeCR = E->getComputationResultType();
-  OpInfo.Ty = PromotionTypeCR;
+  OpInfo.Ty = PromotionTypeCR.getAtomicUnqualifiedType();
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efriedma-quic wrote:

Missing test coverage for this change?

https://github.com/llvm/llvm-project/pull/172163