mirror of
https://github.com/rust-lang/rust
synced 2024-10-14 12:33:57 +00:00
37 lines
977 B
Rust
37 lines
977 B
Rust
//@ compile-flags: -O -C no-prepopulate-passes -Z inline-mir
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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::ptr_metadata;
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// CHECK-LABEL: @thin_metadata(
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#[no_mangle]
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pub fn thin_metadata(p: *const ()) {
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// CHECK: start
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// CHECK-NEXT: ret void
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ptr_metadata(p)
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}
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// CHECK-LABEL: @slice_metadata(
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#[no_mangle]
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pub fn slice_metadata(p: *const [u8]) -> usize {
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// CHECK: start
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// CHECK-NEXT: ret i64 %p.1
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ptr_metadata(p)
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}
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// CHECK-LABEL: @dyn_byte_offset(
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#[no_mangle]
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pub unsafe fn dyn_byte_offset(
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p: *const dyn std::fmt::Debug,
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n: usize,
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) -> *const dyn std::fmt::Debug {
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// CHECK: %[[Q:.+]] = getelementptr inbounds i8, ptr %p.0, i64 %n
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// CHECK: %[[TEMP1:.+]] = insertvalue { ptr, ptr } poison, ptr %[[Q]], 0
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// CHECK: %[[TEMP2:.+]] = insertvalue { ptr, ptr } %[[TEMP1]], ptr %p.1, 1
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// CHECK: ret { ptr, ptr } %[[TEMP2]]
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p.byte_add(n)
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}
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