rustc_llvm::LLVMUnpackOptimizationDiagnostic

pub unsafe extern fn LLVMUnpackOptimizationDiagnostic(DI: DiagnosticInfoRef, pass_name_out: *mut *const c_char, function_out: *mut ValueRef, debugloc_out: *mut DebugLocRef, message_out: *mut TwineRef)

Unstable (rustc_private)