Apply noreturn and nounwind LLVM attributes to callsites

Author: Amanieu

compiler/rustc_codegen_llvm/src/abi.rs

@@ -511,7 +511,12 @@ impl<'tcx> FnAbiLlvmExt<'tcx> for FnAbi<'tcx, Ty<'tcx>> {
     }
 
     fn apply_attrs_callsite(&self, bx: &mut Builder<'a, 'll, 'tcx>, callsite: &'ll Value) {
-        // FIXME(wesleywiser, eddyb): We should apply `nounwind` and `noreturn` as appropriate to this callsite.
+        if self.ret.layout.abi.is_uninhabited() {
+            llvm::Attribute::NoReturn.apply_callsite(llvm::AttributePlace::Function, callsite);
+        }
+        if !self.can_unwind {
+            llvm::Attribute::NoUnwind.apply_callsite(llvm::AttributePlace::Function, callsite);
+        }
 
         let mut i = 0;
         let mut apply = |cx: &CodegenCx<'_, '_>, attrs: &ArgAttributes| {