mirror of https://github.com/rust-lang/rust
30 lines
1.1 KiB
Rust
30 lines
1.1 KiB
Rust
//@ needs-llvm-components: x86
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//@ compile-flags: --target=i686-pc-windows-msvc --crate-type=rlib -Cno-prepopulate-passes
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#![no_core]
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#![feature(no_core, lang_items)]
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#[lang = "sized"]
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trait Sized {}
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// Test that `nounwind` attributes are correctly applied to exported `fastcall` and
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// `fastcall-unwind` extern functions. `fastcall-unwind` functions MUST NOT have this attribute. We
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// disable optimizations above to prevent LLVM from inferring the attribute.
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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 "fastcall" fn rust_item_that_cannot_unwind() {}
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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 "fastcall-unwind" fn rust_item_that_can_unwind() {}
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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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