| //@ compile-flags: -C opt-level=0 |
| //@ needs-unwind |
| |
| // Test that `nounwind` attributes are correctly applied to exported `C` and `C-unwind` extern |
| // functions. `C-unwind` functions MUST NOT have this attribute. We disable optimizations above |
| // to prevent LLVM from inferring the attribute. |
| |
| #![crate_type = "lib"] |
| |
| // CHECK: @rust_item_that_cannot_unwind() unnamed_addr #0 { |
| #[no_mangle] |
| pub extern "C" fn rust_item_that_cannot_unwind() {} |
| |
| // CHECK: @rust_item_that_can_unwind() unnamed_addr #1 { |
| #[no_mangle] |
| pub extern "C-unwind" fn rust_item_that_can_unwind() {} |
| |
| // Now, make some assertions that the LLVM attributes for these functions are correct. First, make |
| // sure that the first item is correctly marked with the `nounwind` attribute: |
| // |
| // CHECK: attributes #0 = { {{.*}}nounwind{{.*}} } |
| // |
| // Next, let's assert that the second item, which CAN unwind, does not have this attribute. |
| // |
| // CHECK: attributes #1 = { |
| // CHECK-NOT: nounwind |
| // CHECK: } |
