| // RUN: %clang_cc1 %s -triple=x86_64-pc-linux -emit-llvm -o - | FileCheck --check-prefix=X86 %s |
| // RUN: %clang_cc1 %s -triple=wasm32 -emit-llvm -o - | FileCheck --check-prefix=WASM %s |
| // RUN: %clang_cc1 %s -triple=armv7-apple-darwin9 -emit-llvm -o - | FileCheck --check-prefix=ARM %s |
| |
| // Test that destructors are not passed directly to __cxa_atexit when their |
| // signatures do not match the type of its first argument. |
| // e.g. ARM and WebAssembly have destructors that return this instead of void. |
| |
| |
| class Foo { |
| public: |
| ~Foo() { |
| } |
| }; |
| |
| Foo global; |
| |
| // X86 destructors have void return, and are registered directly with __cxa_atexit. |
| // X86: define internal void @__cxx_global_var_init() |
| // X86: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%class.Foo*)* @_ZN3FooD1Ev to void (i8*)*), i8* getelementptr inbounds (%class.Foo, %class.Foo* @global, i32 0, i32 0), i8* @__dso_handle) |
| |
| // ARM destructors return this, but can be registered directly with __cxa_atexit |
| // because the calling conventions tolerate the mismatch. |
| // ARM: define internal void @__cxx_global_var_init() |
| // ARM: call i32 @__cxa_atexit(void (i8*)* bitcast (%class.Foo* (%class.Foo*)* @_ZN3FooD1Ev to void (i8*)*), i8* getelementptr inbounds (%class.Foo, %class.Foo* @global, i32 0, i32 0), i8* @__dso_handle) |
| |
| // Wasm destructors return this, and use a wrapper function, which is registered |
| // with __cxa_atexit. |
| // WASM: define internal void @__cxx_global_var_init() |
| // WASM: call i32 @__cxa_atexit(void (i8*)* @__cxx_global_array_dtor, i8* null, i8* @__dso_handle) |
| |
| // WASM: define internal void @__cxx_global_array_dtor(i8*) |
| // WASM: %call = call %class.Foo* @_ZN3FooD1Ev(%class.Foo* @global) |
