55 lines
1.9 KiB
Rust
55 lines
1.9 KiB
Rust
// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// compile-flags: -O -C no-prepopulate-passes
|
|
|
|
#![crate_type = "lib"]
|
|
#![feature(rustc_attrs)]
|
|
|
|
// CHECK-LABEL: @test
|
|
#[no_mangle]
|
|
#[rustc_mir] // FIXME #27840 MIR has different codegen.
|
|
pub fn test() {
|
|
let a = 0;
|
|
&a; // keep variable in an alloca
|
|
|
|
// CHECK: [[S_a:%[0-9]+]] = bitcast i32* %a to i8*
|
|
// CHECK: call void @llvm.lifetime.start(i{{[0-9 ]+}}, i8* [[S_a]])
|
|
|
|
{
|
|
let b = &Some(a);
|
|
&b; // keep variable in an alloca
|
|
|
|
// CHECK: [[S_b:%[0-9]+]] = bitcast %"2.std::option::Option<i32>"** %b to i8*
|
|
// CHECK: call void @llvm.lifetime.start(i{{[0-9 ]+}}, i8* [[S_b]])
|
|
|
|
// CHECK: [[S__5:%[0-9]+]] = bitcast %"2.std::option::Option<i32>"* %_5 to i8*
|
|
// CHECK: call void @llvm.lifetime.start(i{{[0-9 ]+}}, i8* [[S__5]])
|
|
|
|
// CHECK: [[E__5:%[0-9]+]] = bitcast %"2.std::option::Option<i32>"* %_5 to i8*
|
|
// CHECK: call void @llvm.lifetime.end(i{{[0-9 ]+}}, i8* [[E__5]])
|
|
|
|
// CHECK: [[E_b:%[0-9]+]] = bitcast %"2.std::option::Option<i32>"** %b to i8*
|
|
// CHECK: call void @llvm.lifetime.end(i{{[0-9 ]+}}, i8* [[E_b]])
|
|
}
|
|
|
|
let c = 1;
|
|
&c; // keep variable in an alloca
|
|
|
|
// CHECK: [[S_c:%[0-9]+]] = bitcast i32* %c to i8*
|
|
// CHECK: call void @llvm.lifetime.start(i{{[0-9 ]+}}, i8* [[S_c]])
|
|
|
|
// CHECK: [[E_c:%[0-9]+]] = bitcast i32* %c to i8*
|
|
// CHECK: call void @llvm.lifetime.end(i{{[0-9 ]+}}, i8* [[E_c]])
|
|
|
|
// CHECK: [[E_a:%[0-9]+]] = bitcast i32* %a to i8*
|
|
// CHECK: call void @llvm.lifetime.end(i{{[0-9 ]+}}, i8* [[E_a]])
|
|
}
|