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