Function rustc_codegen_llvm::declare::declare_raw_fn

fn declare_raw_fn<'ll>(
    cx: &CodegenCx<'ll, '_>,
    name: &str,
    callconv: CallConv,
    unnamed: UnnamedAddr,
    visibility: Visibility,
    ty: &'ll Type
) -> &'ll Value

Declare a function.

If there’s a value with the same name already declared, the function will update the declaration and return existing Value instead.