49 lines
1.1 KiB
Rust
49 lines
1.1 KiB
Rust
// skip-filecheck
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// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
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// Check that CopyProp considers reborrows as not mutating the pointer.
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//@ unit-test: CopyProp
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#![feature(raw_ref_op)]
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#[inline(never)]
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fn opaque(_: impl Sized) {}
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// EMIT_MIR reborrow.remut.CopyProp.diff
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fn remut(mut x: u8) {
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let a = &mut x;
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let b = &mut *a; //< this cannot mutate a.
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let c = a; //< so `c` and `a` can be merged.
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opaque(c);
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}
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// EMIT_MIR reborrow.reraw.CopyProp.diff
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fn reraw(mut x: u8) {
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let a = &mut x;
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let b = &raw mut *a; //< this cannot mutate a.
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let c = a; //< so `c` and `a` can be merged.
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opaque(c);
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}
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// EMIT_MIR reborrow.miraw.CopyProp.diff
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fn miraw(mut x: u8) {
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let a = &raw mut x;
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let b = unsafe { &raw mut *a }; //< this cannot mutate a.
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let c = a; //< so `c` and `a` can be merged.
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opaque(c);
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}
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// EMIT_MIR reborrow.demiraw.CopyProp.diff
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fn demiraw(mut x: u8) {
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let a = &raw mut x;
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let b = unsafe { &mut *a }; //< this cannot mutate a.
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let c = a; //< so `c` and `a` can be merged.
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opaque(c);
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}
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fn main() {
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remut(0);
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reraw(0);
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miraw(0);
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demiraw(0);
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}
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