rust/tests/codegen/ffi-returns-twice.rs

// compile-flags: -C no-prepopulate-passes
#![crate_type = "lib"]
#![feature(ffi_returns_twice)]

pub fn bar() { unsafe { foo() } }

extern "C" {
    // CHECK: declare{{( dso_local)?}} void @foo(){{.*}}[[ATTRS:#[0-9]+]]
    // CHECK: attributes [[ATTRS]] = { {{.*}}returns_twice{{.*}} }
    #[ffi_returns_twice] pub fn foo();
}
Implement ffi_returns_twice attribute 2019-02-09 08:55:30 -06:00			`// compile-flags: -C no-prepopulate-passes`
			`#![crate_type = "lib"]`
			`#![feature(ffi_returns_twice)]`

Use pattern to match attributes 2019-02-10 02:59:07 -06:00			`pub fn bar() { unsafe { foo() } }`
Implement ffi_returns_twice attribute 2019-02-09 08:55:30 -06:00
Update tests for extern block linting 2020-09-01 16:12:52 -05:00			`extern "C" {`
Manually set dso_local when its valid to do so This should have no real effect in most cases, as e.g. `hidden` visibility already implies `dso_local` (or at least LLVM IR does not preserve the `dso_local` setting if the item is already `hidden`), but it should fix `-Crelocation-model=static` and improve codegen in executables. Note that this PR does not exhaustively port the logic in [clang]. Only the obviously correct portion and what is necessary to fix a regression from LLVM 12 that relates to `-Crelocation_model=static`. Fixes #83335 [clang]: https://github.com/llvm/llvm-project/blob/3001d080c813da20b329303bf8f45451480e5905/clang/lib/CodeGen/CodeGenModule.cpp#L945-L1039 2021-03-27 17:11:24 -05:00			`// CHECK: declare{{( dso_local)?}} void @foo(){{.*}}[[ATTRS:#[0-9]+]]`
			`// CHECK: attributes [[ATTRS]] = { {{.}}returns_twice{{.}} }`
Use pattern to match attributes 2019-02-10 02:59:07 -06:00			`#[ffi_returns_twice] pub fn foo();`
Implement ffi_returns_twice attribute 2019-02-09 08:55:30 -06:00			`}`