mirror of https://github.com/rust-lang/rust
73 lines
1.9 KiB
Rust
73 lines
1.9 KiB
Rust
// skip-filecheck
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//@ test-mir-pass: AddRetag
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// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
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// ignore-tidy-linelength
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//@ compile-flags: -Z mir-emit-retag -Z mir-opt-level=0 -Z span_free_formats
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#![allow(unused)]
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struct Test(i32);
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// EMIT_MIR retag.{impl#0}-foo.SimplifyCfg-pre-optimizations.after.mir
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// EMIT_MIR retag.{impl#0}-foo_shr.SimplifyCfg-pre-optimizations.after.mir
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impl Test {
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// Make sure we run the pass on a method, not just on bare functions.
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fn foo<'x>(&self, x: &'x mut i32) -> &'x mut i32 {
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x
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}
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fn foo_shr<'x>(&self, x: &'x i32) -> &'x i32 {
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x
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}
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}
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// EMIT_MIR core.ptr-drop_in_place.Test.SimplifyCfg-make_shim.after.mir
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impl Drop for Test {
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fn drop(&mut self) {}
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}
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// EMIT_MIR retag.main.SimplifyCfg-pre-optimizations.after.mir
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// EMIT_MIR retag.main-{closure#0}.SimplifyCfg-pre-optimizations.after.mir
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pub fn main() {
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let mut x = 0;
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{
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let v = Test(0).foo(&mut x); // just making sure we do not panic when there is a tuple struct ctor
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let w = { v }; // assignment
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let w = w; // reborrow
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// escape-to-raw (mut)
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let _w = w as *mut _;
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}
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// Also test closures
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let c: fn(&i32) -> &i32 = |x: &i32| -> &i32 {
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let _y = x;
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x
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};
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let _w = c(&x);
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// need to call `foo_shr` or it doesn't even get generated
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Test(0).foo_shr(&0);
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// escape-to-raw (shr)
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let _w = _w as *const _;
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array_casts();
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}
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/// Casting directly to an array should also go through `&raw` and thus add appropriate retags.
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// EMIT_MIR retag.array_casts.SimplifyCfg-pre-optimizations.after.mir
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fn array_casts() {
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let mut x: [usize; 2] = [0, 0];
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let p = &mut x as *mut usize;
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unsafe { *p.add(1) = 1; }
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let x: [usize; 2] = [0, 1];
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let p = &x as *const usize;
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assert_eq!(unsafe { *p.add(1) }, 1);
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}
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// EMIT_MIR retag.box_to_raw_mut.SimplifyCfg-pre-optimizations.after.mir
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fn box_to_raw_mut(x: &mut Box<i32>) -> *mut i32 {
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std::ptr::addr_of_mut!(**x)
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}
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