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[CIR] Implement lowering for LinkageSpecDecl #137634

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Merged
merged 1 commit into from
Apr 28, 2025
Merged

[CIR] Implement lowering for LinkageSpecDecl #137634

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1 change: 1 addition & 0 deletions clang/lib/CIR/CodeGen/CIRGenDecl.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -260,6 +260,7 @@ void CIRGenFunction::emitExprAsInit(const Expr *init, const ValueDecl *d,

void CIRGenFunction::emitDecl(const Decl &d) {
switch (d.getKind()) {
case Decl::LinkageSpec:
case Decl::Namespace:
llvm_unreachable("Declaration should not be in declstmts!");

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3 changes: 2 additions & 1 deletion clang/lib/CIR/CodeGen/CIRGenModule.cpp
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Expand Up @@ -677,8 +677,9 @@ void CIRGenModule::emitTopLevelDecl(Decl *decl) {
break;

// C++ Decls
case Decl::LinkageSpec:
case Decl::Namespace:
emitDeclContext(cast<NamespaceDecl>(decl));
emitDeclContext(Decl::castToDeclContext(decl));
break;
}
}
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42 changes: 42 additions & 0 deletions clang/test/CIR/CodeGen/linkage-spec.cpp
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@@ -0,0 +1,42 @@
// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o - 2>&1 | FileCheck %s

extern "C" void TopLevelC(){}
// CHECK: cir.func @TopLevelC() {
extern "C++" void TopLevelCpp(){}
// CHECK: cir.func @_Z11TopLevelCppv() {

extern "C++" {
void ExternCppEmpty(){}
// CHECK: cir.func @_Z14ExternCppEmptyv() {
extern "C" void ExternCpp_C(){}
// CHECK: cir.func @ExternCpp_C() {
extern "C++" void ExternCpp_Cpp(){}
// CHECK: cir.func @_Z13ExternCpp_Cppv() {

extern "C" {
void ExternCpp_CEmpty(){}
// CHECK: cir.func @ExternCpp_CEmpty() {
extern "C" void ExternCpp_C_C(){}
// CHECK: cir.func @ExternCpp_C_C() {
extern "C++" void ExternCpp_C_Cpp(){}
// CHECK: cir.func @_Z15ExternCpp_C_Cppv() {
}
}

extern "C" {
void ExternCEmpty(){}
// CHECK: cir.func @ExternCEmpty() {
extern "C" void ExternC_C(){}
// CHECK: cir.func @ExternC_C() {
extern "C++" void ExternC_Cpp(){}
// CHECK: cir.func @_Z11ExternC_Cppv() {
extern "C++" {
void ExternC_CppEmpty(){}
// CHECK: cir.func @_Z16ExternC_CppEmptyv() {
extern "C" void ExternC_Cpp_C(){}
// CHECK: cir.func @ExternC_Cpp_C() {
extern "C++" void ExternC_Cpp_Cpp(){}
// CHECK: cir.func @_Z15ExternC_Cpp_Cppv() {
}
}