774268afc1
We're using `Layout` on both sides, so might as well skip the transmutes back and forth to `usize`. The mir-opt test shows that doing so allows simplifying the boxed-slice drop slightly, for example.
16 lines
710 B
Rust
16 lines
710 B
Rust
//@ compile-flags: -O -Zmir-opt-level=2
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// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
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// EMIT_MIR_FOR_EACH_BIT_WIDTH
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#![crate_type = "lib"]
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// EMIT_MIR drop_boxed_slice.generic_in_place.PreCodegen.after.mir
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pub unsafe fn generic_in_place<T: Copy>(ptr: *mut Box<[T]>) {
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// CHECK-LABEL: fn generic_in_place(_1: *mut Box<[T]>)
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// CHECK: (inlined <Box<[T]> as Drop>::drop)
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// CHECK: [[SIZE:_.+]] = std::intrinsics::size_of_val::<[T]>
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// CHECK: [[ALIGN:_.+]] = const <T as std::mem::SizedTypeProperties>::ALIGN;
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// CHECK: [[B:_.+]] = copy [[ALIGN]] as std::ptr::Alignment (Transmute);
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// CHECK: = alloc::alloc::__rust_dealloc({{.+}}, move [[SIZE]], move [[B]]) ->
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std::ptr::drop_in_place(ptr)
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}
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