Static rustc_lint::builtin::NAMED_ASM_LABELS

pub static NAMED_ASM_LABELS: &'static Lint

The named_asm_labels lint detects the use of named labels in the inline asm! macro.

Example

use std::arch::asm;

fn main() {
    unsafe {
        asm!("foo: bar");
    }
}

{{produces}}

Explanation

LLVM is allowed to duplicate inline assembly blocks for any reason, for example when it is in a function that gets inlined. Because of this, GNU assembler local labels must be used instead of labels with a name. Using named labels might cause assembler or linker errors.

See the explanation in Rust By Example for more details.