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