70 lines
2.5 KiB
Rust
70 lines
2.5 KiB
Rust
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// ignore-tidy-linelength
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// compile-flags: -Z verbose -Z mir-emit-validate=2 -Z span_free_formats
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// Make sure unsafe fns and fns with an unsafe block still get full validation.
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unsafe fn write_42(x: *mut i32) -> bool {
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*x = 42;
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true
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}
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fn test(x: &mut i32) {
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unsafe { write_42(x) };
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}
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fn main() {
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test(&mut 0);
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let test_closure = unsafe { |x: &mut i32| write_42(x) };
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// Note that validation will fail if this is executed: The closure keeps the lock on
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// x, so the write in write_42 fails. This test just checks code generation,
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// so the UB doesn't matter.
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test_closure(&mut 0);
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}
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// END RUST SOURCE
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// START rustc.test.EraseRegions.after.mir
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// fn test(_1: &ReErased mut i32) -> () {
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// ...
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// bb0: {
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// Validate(Acquire, [_1: &ReFree(DefId(0/0:4 ~ validate_5[317d]::test[0]), BrAnon(0)) mut i32]);
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// ...
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// Validate(Release, [_2: bool, _3: *mut i32]);
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// _2 = const write_42(move _3) -> bb1;
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// }
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// ...
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// }
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// END rustc.test.EraseRegions.after.mir
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// START rustc.main-{{closure}}.EraseRegions.after.mir
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// fn main::{{closure}}(_1: &ReErased [closure@NodeId(46)], _2: &ReErased mut i32) -> bool {
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// ...
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// bb0: {
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// Validate(Acquire, [_1: &ReFree(DefId(0/1:9 ~ validate_5[317d]::main[0]::{{closure}}[0]), BrEnv) [closure@NodeId(46)], _2: &ReFree(DefId(0/1:9 ~ validate_5[317d]::main[0]::{{closure}}[0]), BrAnon(0)) mut i32]);
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// StorageLive(_3);
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// StorageLive(_4);
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// StorageLive(_5);
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// Validate(Suspend(ReScope(Node(ItemLocalId(12)))), [(*_2): i32]);
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// _5 = &ReErased mut (*_2);
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// Validate(Acquire, [(*_5): i32/ReScope(Node(ItemLocalId(12)))]);
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// _4 = move _5 as *mut i32 (Misc);
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// _3 = move _4;
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// EndRegion(ReScope(Node(ItemLocalId(12))));
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// StorageDead(_4);
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// StorageDead(_5);
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// Validate(Release, [_0: bool, _3: *mut i32]);
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// _0 = const write_42(move _3) -> bb1;
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// }
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// ...
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// }
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// END rustc.main-{{closure}}.EraseRegions.after.mir
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