mirror of https://github.com/rust-lang/rust
27 lines
652 B
Rust
27 lines
652 B
Rust
//@ test-mir-pass: GVN
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//@ compile-flags: -O
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// Regression test for https://github.com/rust-lang/rust/issues/118328
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#![allow(unused_assignments)]
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struct SizeOfConst<T>(std::marker::PhantomData<T>);
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impl<T> SizeOfConst<T> {
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const SIZE: usize = std::mem::size_of::<T>();
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}
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// EMIT_MIR overwrite_with_const_with_params.size_of.GVN.diff
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fn size_of<T>() -> usize {
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// CHECK-LABEL: fn size_of(
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// CHECK: _1 = const 0_usize;
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// CHECK-NEXT: _1 = const SizeOfConst::<T>::SIZE;
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// CHECK-NEXT: _0 = _1;
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let mut a = 0;
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a = SizeOfConst::<T>::SIZE;
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a
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}
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fn main() {
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assert_eq!(size_of::<u32>(), std::mem::size_of::<u32>());
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}
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