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test Retag in drop shim
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RalfJung committed Aug 5, 2019
1 parent bb4a055 commit 3df672f
Showing 1 changed file with 26 additions and 11 deletions.
37 changes: 26 additions & 11 deletions src/test/mir-opt/retag.rs
Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,10 @@ impl Test {
fn foo_shr<'x>(&self, x: &'x i32) -> &'x i32 { x }
}

impl Drop for Test {
fn drop(&mut self) {}
}

fn main() {
let mut x = 0;
{
Expand Down Expand Up @@ -60,10 +64,12 @@ fn main() {
// ...
// bb0: {
// ...
// _3 = const Test::foo(move _4, move _6) -> bb1;
// _3 = const Test::foo(move _4, move _6) -> [return: bb2, unwind: bb3];
// }
//
// bb1: {
// ...
//
// bb2: {
// Retag(_3);
// ...
// _9 = move _3;
Expand All @@ -80,25 +86,20 @@ fn main() {
// _12 = move _13 as *mut i32 (Misc);
// Retag([raw] _12);
// ...
// _16 = move _17(move _18) -> bb2;
// _16 = move _17(move _18) -> bb5;
// }
//
// bb2: {
// bb5: {
// Retag(_16);
// ...
// _20 = const Test::foo_shr(move _21, move _23) -> bb3;
// }
//
// bb3: {
// ...
// return;
// _20 = const Test::foo_shr(move _21, move _23) -> [return: bb6, unwind: bb7];
// }
//
// ...
// }
// END rustc.main.EraseRegions.after.mir
// START rustc.main-{{closure}}.EraseRegions.after.mir
// fn main::{{closure}}#0(_1: &[closure@HirId { owner: DefIndex(20), local_id: 72 }], _2: &i32) -> &i32 {
// fn main::{{closure}}#0(_1: &[closure@HirId { owner: DefIndex(22), local_id: 72 }], _2: &i32) -> &i32 {
// ...
// bb0: {
// Retag([fn entry] _1);
Expand All @@ -113,3 +114,17 @@ fn main() {
// }
// }
// END rustc.main-{{closure}}.EraseRegions.after.mir
// START rustc.ptr-real_drop_in_place.Test.SimplifyCfg-make_shim.after.mir
// fn std::ptr::real_drop_in_place(_1: &mut Test) -> () {
// ...
// bb0: {
// Retag([raw] _1);
// _2 = &mut (*_1);
// _3 = const <Test as std::ops::Drop>::drop(move _2) -> bb1;
// }
//
// bb1: {
// return;
// }
// }
// END rustc.ptr-real_drop_in_place.Test.SimplifyCfg-make_shim.after.mir

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