commit d2e69dfddbed3dccc7926cdf01e6aa32f47a0570
author Richard Smith <richard-llvm@metafoo.co.uk> Tue Oct 30 02:02:49 2018 +0000
committer Richard Smith <richard-llvm@metafoo.co.uk> Tue Oct 30 02:02:49 2018 +0000
tree 19f42d86224a092777aab4fb1f18186668d7f54f
parent 2f3e8b3d2e4c8679d891568ddc7b6fc73d19c4aa

PR23833, DR2140: an lvalue-to-rvalue conversion on a glvalue of type
nullptr_t does not access memory.

We now reuse CK_NullToPointer to represent a conversion from a glvalue
of type nullptr_t to a prvalue of nullptr_t where necessary.

llvm-svn: 345562

clang/lib/CodeGen/CGExprScalar.cpp

diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index c0cb8ad..a2b3f99 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -1895,14 +1895,14 @@
 
   case CK_NullToPointer:
     if (MustVisitNullValue(E))
-      (void) Visit(E);
+      CGF.EmitIgnoredExpr(E);
 
     return CGF.CGM.getNullPointer(cast<llvm::PointerType>(ConvertType(DestTy)),
                               DestTy);
 
   case CK_NullToMemberPointer: {
     if (MustVisitNullValue(E))
-      (void) Visit(E);
+      CGF.EmitIgnoredExpr(E);
 
     const MemberPointerType *MPT = CE->getType()->getAs<MemberPointerType>();
     return CGF.CGM.getCXXABI().EmitNullMemberPointer(MPT);