llvm-project/null-cast.cpp at 761787d42576751afbaaba5107233ee849f81b6f - llvm-project - Gitea For EOELAB

mirrors/llvm-project

mirror of https://github.com/llvm/llvm-project.git synced 2025-04-17 03:16:37 +00:00

Tim Northover 0150333a3c Create valid LValue to represent null pointers in constant exprs

We were leaving the SubobjectDesignator in a surprising situation, where
it was allegedly valid but didn't actually refer to a type. This caused
a crash later on.

This patch fills out the SubobjectDesignator with the pointee type (as
happens in other evaluations of constant pointers) so that we don't
crash later.

llvm-svn: 303957

2017-05-26 02:16:00 +00:00

9 lines

227 B

C++

Raw Blame History

 // RUN: %clang_cc1 -fsyntax-only -verify %s
 struct A {};
 struct B : virtual A {};
 void foo() {
   (void)static_cast<A&>(*(B *)0); // expected-warning {{binding dereferenced null pointer to reference has undefined behavior}}
 }