rust/tests/codegen/refs.rs

22 lines
673 B
Rust

//@ compile-flags: -C no-prepopulate-passes -Zmir-opt-level=0 -Copt-level=0
#![crate_type = "lib"]
// Hack to get the correct size for the length part in slices
// CHECK: @helper([[USIZE:i[0-9]+]] %_1)
#[no_mangle]
pub fn helper(_: usize) {}
// CHECK-LABEL: @ref_dst
#[no_mangle]
pub fn ref_dst(s: &[u8]) {
// We used to generate an extra alloca and memcpy to ref the dst, so check that we copy
// directly to the alloca for "x"
// CHECK: store ptr %s.0, {{.*}} %x
// CHECK: [[X1:%[0-9]+]] = getelementptr inbounds i8, {{.*}} %x, {{i32 4|i64 8}}
// CHECK: store [[USIZE]] %s.1, {{.*}} [[X1]]
let x = &*s;
&x; // keep variable in an alloca
}