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34 lines
677 B
Rust
34 lines
677 B
Rust
// compile-flags: -O
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#![feature(c_unwind)]
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#![crate_type = "lib"]
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pub struct Foo([u8; 1000]);
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extern "C" {
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fn init(p: *mut Foo);
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}
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pub fn new_from_uninit() -> Foo {
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// CHECK-LABEL: new_from_uninit
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// CHECK-NOT: call void @llvm.memcpy.
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let mut x = std::mem::MaybeUninit::uninit();
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unsafe {
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init(x.as_mut_ptr());
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x.assume_init()
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}
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}
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extern "C-unwind" {
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fn init_unwind(p: *mut Foo);
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}
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pub fn new_from_uninit_unwind() -> Foo {
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// CHECK-LABEL: new_from_uninit
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// CHECK: call void @llvm.memcpy.
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let mut x = std::mem::MaybeUninit::uninit();
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unsafe {
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init_unwind(x.as_mut_ptr());
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x.assume_init()
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}
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}
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