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24 lines
731 B
Rust
24 lines
731 B
Rust
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//@ compile-flags: -O -C no-prepopulate-passes -Z mir-enable-passes=-InstSimplify
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//@ only-64bit (so I don't need to worry about usize)
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#![crate_type = "lib"]
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#![feature(core_intrinsics)]
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use std::intrinsics::aggregate_raw_ptr;
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// InstSimplify replaces these with casts if it can, which means they're almost
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// never seen in codegen, but PR#121571 found a way, so add a test for it.
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#[inline(never)]
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pub fn opaque(_p: &*const i32) {}
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// CHECK-LABEL: @thin_ptr_via_aggregate(
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#[no_mangle]
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pub unsafe fn thin_ptr_via_aggregate(p: *const ()) {
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// CHECK: %mem = alloca
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// CHECK: store ptr %p, ptr %mem
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// CHECK: call {{.+}}aggregate_thin_pointer{{.+}} %mem)
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let mem = aggregate_raw_ptr(p, ());
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opaque(&mem);
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}
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