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Diffstat (limited to 'tests/codegen/function-return.rs')
| -rw-r--r-- | tests/codegen/function-return.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/codegen/function-return.rs b/tests/codegen/function-return.rs new file mode 100644 index 000000000..d832d19ac --- /dev/null +++ b/tests/codegen/function-return.rs @@ -0,0 +1,28 @@ +// Test that the `fn_ret_thunk_extern` function attribute is (not) emitted when +// the `-Zfunction-return={keep,thunk-extern}` flag is (not) set. + +// revisions: unset keep thunk-extern keep-thunk-extern thunk-extern-keep +// needs-llvm-components: x86 +// compile-flags: --target x86_64-unknown-linux-gnu +// [keep] compile-flags: -Zfunction-return=keep +// [thunk-extern] compile-flags: -Zfunction-return=thunk-extern +// [keep-thunk-extern] compile-flags: -Zfunction-return=keep -Zfunction-return=thunk-extern +// [thunk-extern-keep] compile-flags: -Zfunction-return=thunk-extern -Zfunction-return=keep + +#![crate_type = "lib"] +#![feature(no_core, lang_items)] +#![no_core] + +#[lang = "sized"] +trait Sized {} + +#[no_mangle] +pub fn foo() { + // CHECK: @foo() unnamed_addr #0 + + // unset-NOT: fn_ret_thunk_extern + // keep-NOT: fn_ret_thunk_extern + // thunk-extern: attributes #0 = { {{.*}}fn_ret_thunk_extern{{.*}} } + // keep-thunk-extern: attributes #0 = { {{.*}}fn_ret_thunk_extern{{.*}} } + // thunk-extern-keep-NOT: fn_ret_thunk_extern +} |