Add codegen support for __null

llvm-svn: 61314

2 files changed, 9 insertions, 0 deletions

diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 11f07fb1166..db9536633be 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -416,6 +416,12 @@ public:
     return true;
   }
   
+  bool VisitGNUNullExpr(const GNUNullExpr *E) {
+    Result = APSInt::getNullValue(getIntTypeSizeInBits(E->getType()));
+    Result.setIsUnsigned(E->getType()->isUnsignedIntegerType());
+    return true;
+  }
+    
   bool VisitCXXZeroInitValueExpr(const CXXZeroInitValueExpr *E) {
     Result = APSInt::getNullValue(getIntTypeSizeInBits(E->getType()));
     Result.setIsUnsigned(E->getType()->isUnsignedIntegerType());
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index a5d5bc22af0..71f9f92f9c4 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -113,6 +113,9 @@ public:
   Value *VisitCXXZeroInitValueExpr(const CXXZeroInitValueExpr *E) {
     return llvm::Constant::getNullValue(ConvertType(E->getType()));
   }
+  Value *VisitGNUNullExpr(const GNUNullExpr *E) {
+    return llvm::Constant::getNullValue(ConvertType(E->getType()));
+  }
   Value *VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) {
     return llvm::ConstantInt::get(ConvertType(E->getType()),
                                   CGF.getContext().typesAreCompatible(