[clang] [CIR] Upstream ChooseExpr for ComplexType (PR #145163)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang

@llvm/pr-subscribers-clangir

Author: Amr Hesham (AmrDeveloper)

<details>
<summary>Changes</summary>

This change adds support for ChooseExpr for ComplexType

https://github.com/llvm/llvm-project/issues/141365

---
Full diff: https://github.com/llvm/llvm-project/pull/145163.diff


2 Files Affected:

- (modified) clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp (+5) 
- (added) clang/test/CIR/CodeGen/complex-builtins.cpp (+35) 


``````````diff
diff --git a/clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp b/clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp
index eaa199abc1657..9a883cba46ce8 100644
--- a/clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp
@@ -41,6 +41,7 @@ class ComplexExprEmitter : public StmtVisitor<ComplexExprEmitter, mlir::Value> {
 
   mlir::Value VisitBinAssign(const BinaryOperator *e);
   mlir::Value VisitCallExpr(const CallExpr *e);
+  mlir::Value VisitChooseExpr(ChooseExpr *e);
   mlir::Value VisitDeclRefExpr(DeclRefExpr *e);
   mlir::Value VisitImplicitCastExpr(ImplicitCastExpr *e);
   mlir::Value VisitInitListExpr(const InitListExpr *e);
@@ -140,6 +141,10 @@ mlir::Value ComplexExprEmitter::VisitCallExpr(const CallExpr *e) {
   return cgf.emitCallExpr(e).getValue();
 }
 
+mlir::Value ComplexExprEmitter::VisitChooseExpr(ChooseExpr *e) {
+  return Visit(e->getChosenSubExpr());
+}
+
 mlir::Value ComplexExprEmitter::VisitDeclRefExpr(DeclRefExpr *e) {
   if (CIRGenFunction::ConstantEmission constant = cgf.tryEmitAsConstant(e))
     return emitConstant(constant, e);
diff --git a/clang/test/CIR/CodeGen/complex-builtins.cpp b/clang/test/CIR/CodeGen/complex-builtins.cpp
new file mode 100644
index 0000000000000..2372ab571e533
--- /dev/null
+++ b/clang/test/CIR/CodeGen/complex-builtins.cpp
@@ -0,0 +1,35 @@
+// 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
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value -emit-llvm %s -o %t.ll
+// RUN: FileCheck --input-file=%t.ll %s -check-prefix=OGCG
+
+void foo() {
+ 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: %[[COMPLEX_R:.*]] = 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]], %[[COMPLEX_R]] : !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: %[[COMPLEX_R:.*]] = 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 %[[COMPLEX_R]], align 4
+
+// OGCG: %[[COMPLEX_A:.*]] = alloca { i32, i32 }, align 4
+// OGCG: %[[COMPLEX_B:.*]] = alloca { i32, i32 }, align 4
+// OGCG: %[[COMPLEX_R:.*]] = alloca { i32, i32 }, align 4
+// OGCG: %[[A_REAL_PTR:.*]] = getelementptr inbounds nuw { i32, i32 }, ptr %[[COMPLEX_A]], i32 0, i32 0
+// OGCG: %[[A_REAL:.*]] = load i32, ptr %[[A_REAL_PTR]], align 4
+// OGCG: %[[A_IMAG_PTR:.*]] = getelementptr inbounds nuw { i32, i32 }, ptr %[[COMPLEX_A]], i32 0, i32 1
+// OGCG: %[[A_IMAG:.*]] = load i32, ptr %[[A_IMAG_PTR]], align 4
+// OGCG: %[[R_REAL_PTR:.*]] = getelementptr inbounds nuw { i32, i32 }, ptr %[[COMPLEX_R]], i32 0, i32 0
+// OGCG: %[[R_IMAG_PTR:.*]] = getelementptr inbounds nuw { i32, i32 }, ptr %[[COMPLEX_R]], i32 0, i32 1
+// OGCG: store i32 %[[A_REAL]], ptr %[[R_REAL_PTR]], align 4
+// OGCG: store i32 %[[A_IMAG]], ptr %[[R_IMAG_PTR]], align 4

``````````

</details>


https://github.com/llvm/llvm-project/pull/145163