diff --git a/clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp b/clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp
index 9c5708067402..1ed9b100411d 100644
--- a/clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp
@@ -313,7 +313,10 @@ class ComplexExprEmitter : public StmtVisitor<ComplexExprEmitter, mlir::Value> {
   VisitAbstractConditionalOperator(const AbstractConditionalOperator *CO) {
     llvm_unreachable("NYI");
   }
-  mlir::Value VisitChooseExpr(ChooseExpr *CE) { llvm_unreachable("NYI"); }
+
+  mlir::Value VisitChooseExpr(ChooseExpr *CE) {
+    return Visit(CE->getChosenSubExpr());
+  }
 
   mlir::Value VisitInitListExpr(InitListExpr *E);
 
diff --git a/clang/test/CIR/CodeGen/complex-builtins.cpp b/clang/test/CIR/CodeGen/complex-builtins.cpp
new file mode 100644
index 000000000000..d0f47751a4d0
--- /dev/null
+++ b/clang/test/CIR/CodeGen/complex-builtins.cpp
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value -fclangir -emit-cir %s -o %t.cir
+// RUN: FileCheck --input-file=%t.cir %s -check-prefix=CIR
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value -fclangir -emit-llvm %s -o %t-cir.ll
+// RUN: FileCheck --input-file=%t-cir.ll %s -check-prefix=LLVM
+
+void complex_choose_expr() {
+ int _Complex a;
+ int _Complex b;
+ int _Complex r = __builtin_choose_expr(true, a, b);
+}
+
+// CIR: %[[COMPLEX_A:.*]] = cir.alloca !cir.complex<!s32i>, !cir.ptr<!cir.complex<!s32i>>, ["a"]
+// CIR: %[[RESULT:.*]] = cir.alloca !cir.complex<!s32i>, !cir.ptr<!cir.complex<!s32i>>, ["r", init]
+// CIR: %[[TMP_A:.*]] = cir.load{{.*}} %[[COMPLEX_A]] : !cir.ptr<!cir.complex<!s32i>>, !cir.complex<!s32i>
+// CIR: cir.store{{.*}} %[[TMP_A]], %[[RESULT]] : !cir.complex<!s32i>, !cir.ptr<!cir.complex<!s32i>>
+
+// LLVM: %[[COMPLEX_A:.*]] = alloca { i32, i32 }, i64 1, align 4
+// LLVM: %[[COMPLEX_B:.*]] = alloca { i32, i32 }, i64 1, align 4
+// LLVM: %[[RESULT:.*]] = alloca { i32, i32 }, i64 1, align 4
+// LLVM: %[[TMP_A:.*]] = load { i32, i32 }, ptr %[[COMPLEX_A]], align 4
+// LLVM: store { i32, i32 } %[[TMP_A]], ptr %[[RESULT]], align 4