mirror of https://github.com/rust-lang/rust
33 lines
879 B
Rust
33 lines
879 B
Rust
//@ test-mir-pass: GVN
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//@ compile-flags: -Zdump-mir-exclude-alloc-bytes
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// EMIT_MIR address_of_pair.fn0.GVN.diff
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pub fn fn0() -> bool {
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// CHECK-LABEL: fn fn0(
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// CHECK: debug pair => [[pair:_.*]];
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// CHECK: debug ptr => [[ptr:_.*]];
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// CHECK: debug ret => [[ret:_.*]];
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// CHECK: (*[[ptr]]) = const true;
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// CHECK-NOT: = const false;
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// CHECK-NOT: = const true;
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// CHECK: [[tmp:_.*]] = copy ([[pair]].1: bool);
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// CHECK-NOT: = const false;
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// CHECK-NOT: = const true;
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// CHECK: [[ret]] = Not(move [[tmp]]);
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// CHECK-NOT: = const false;
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// CHECK-NOT: = const true;
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// CHECK: _0 = copy [[ret]];
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let mut pair = (1, false);
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let ptr = core::ptr::addr_of_mut!(pair.1);
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pair = (1, false);
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unsafe {
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*ptr = true;
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}
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let ret = !pair.1;
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return ret;
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}
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pub fn main() {
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println!("{}", fn0());
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}
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