rust/tests/codegen/vec-optimizes-away.rs
bjorn3 66982a383b Prevent insta-stable no alloc shim support
You will need to add the following as replacement for the old __rust_*
definitions when not using the alloc shim.

    #[no_mangle]
    static __rust_no_alloc_shim_is_unstable: u8 = 0;
2023-05-11 14:35:09 +00:00

14 lines
371 B
Rust

// ignore-debug: the debug assertions get in the way
// no-system-llvm
// compile-flags: -O
#![crate_type = "lib"]
#[no_mangle]
pub fn sum_me() -> i32 {
// CHECK-LABEL: @sum_me
// CHECK-NEXT: {{^.*:$}}
// CHECK-NEXT: {{.*}} load volatile i8, ptr @__rust_no_alloc_shim_is_unstable, align 1
// CHECK-NEXT: ret i32 6
vec![1, 2, 3].iter().sum::<i32>()
}