mirror of https://github.com/rust-lang/rust
20 lines
491 B
Rust
20 lines
491 B
Rust
//@ test-mir-pass: GVN
|
|
//@ compile-flags: -O
|
|
// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
|
|
|
|
#![feature(rustc_attrs, stmt_expr_attributes)]
|
|
|
|
// Note: this test verifies that we, in fact, do not const prop `#[rustc_box]`
|
|
|
|
// EMIT_MIR boxes.main.GVN.diff
|
|
fn main() {
|
|
// CHECK-LABEL: fn main(
|
|
// CHECK: debug x => [[x:_.*]];
|
|
// CHECK: (*{{_.*}}) = const 42_i32;
|
|
// CHECK: [[tmp:_.*]] = (*{{_.*}});
|
|
// CHECK: [[x]] = [[tmp]];
|
|
let x = *(#[rustc_box]
|
|
Box::new(42))
|
|
+ 0;
|
|
}
|