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//@ revisions: DEBUGINFO NODEBUGINFO
//@ compile-flags: -Zunsound-mir-opts
// FIXME: see <https://github.com/rust-lang/rust/issues/132353>
//@ compile-flags: -O -Cno-prepopulate-passes
//@ [DEBUGINFO] compile-flags: -Cdebuginfo=full
// From https://github.com/rust-lang/rust/issues/128081.
// Ensure that we only generate a memcpy instruction.
#![crate_type = "lib"]
#[derive(Clone)]
struct SubCloneAndCopy {
v1: u32,
v2: u32,
}
#[derive(Clone)]
struct CloneOnly {
v1: u8,
v2: u8,
v3: u8,
v4: u8,
v5: u8,
v6: u8,
v7: u8,
v8: u8,
v9: u8,
v_sub: SubCloneAndCopy,
v_large: [u8; 256],
}
// CHECK-LABEL: define {{.*}}@clone_only(
#[no_mangle]
pub fn clone_only(v: &CloneOnly) -> CloneOnly {
// CHECK-NOT: call {{.*}}clone
// CHECK-NOT: store i8
// CHECK-NOT: store i32
// CHECK: call void @llvm.memcpy
// CHECK-NEXT: ret void
v.clone()
}
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