28 lines
1011 B
Rust
28 lines
1011 B
Rust
|
//@ compile-flags: -Cno-prepopulate-passes -Copt-level=0 -Cdebug-assertions=no
|
||
|
|
|
||
|
|
// This test ensures that in a debug build which turns off debug assertions, we do not monomorphize
|
||
|
|
// any of the standard library's unsafe precondition checks.
|
||
|
|
// The naive codegen of those checks contains the actual check underneath an `if false`, which
|
||
|
|
// could be optimized out if optimizations are enabled. But if we rely on optimizations to remove
|
||
|
|
// panic branches, then we can't link compiler_builtins without optimizing it, which means that
|
||
|
|
// -Zbuild-std doesn't work with -Copt-level=0.
|
||
|
|
//
|
||
|
|
// In other words, this tests for a mandatory optimization.
|
||
|
|
|
||
|
|
#![crate_type = "lib"]
|
||
|
|
|
||
|
|
use std::ptr::NonNull;
|
||
|
|
|
||
|
|
// CHECK-LABEL: ; core::ptr::non_null::NonNull<T>::new_unchecked
|
||
|
|
// CHECK-NOT: call
|
||
|
|
// CHECK: }
|
||
|
|
|
||
|
|
// CHECK-LABEL: @nonnull_new
|
||
|
|
#[no_mangle]
|
||
|
|
pub unsafe fn nonnull_new(ptr: *mut u8) -> NonNull<u8> {
|
||
|
|
// CHECK: ; call core::ptr::non_null::NonNull<T>::new_unchecked
|
||
|
|
unsafe {
|
||
|
|
NonNull::new_unchecked(ptr)
|
||
|
|
}
|
||
|
|
}
|