diff options
Diffstat (limited to 'tests/codegen/unwind-abis/system-unwind-abi.rs')
-rw-r--r-- | tests/codegen/unwind-abis/system-unwind-abi.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/tests/codegen/unwind-abis/system-unwind-abi.rs b/tests/codegen/unwind-abis/system-unwind-abi.rs new file mode 100644 index 000000000..2591c1d48 --- /dev/null +++ b/tests/codegen/unwind-abis/system-unwind-abi.rs @@ -0,0 +1,29 @@ +// compile-flags: -C opt-level=0 + +// Test that `nounwind` attributes are correctly applied to exported `system` and `system-unwind` +// extern functions. `system-unwind` functions MUST NOT have this attribute. We disable +// optimizations above to prevent LLVM from inferring the attribute. + +#![crate_type = "lib"] +#![feature(c_unwind)] + +// CHECK: @rust_item_that_cannot_unwind() unnamed_addr #0 { +#[no_mangle] +pub extern "system" fn rust_item_that_cannot_unwind() { +} + +// CHECK: @rust_item_that_can_unwind() unnamed_addr #1 { +#[no_mangle] +pub extern "system-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: } |