Don't try to explicitly zero out bit-fields.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@105391 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CGExprConstant.cpp b/lib/CodeGen/CGExprConstant.cpp
index 21a2a605a432aeb4ac2dc4d33d5df20455dac147..a145a66b59b413ff4fc33c991f58daac35adef0b 100644 (file)
--- a/lib/CodeGen/CGExprConstant.cpp
+++ b/lib/CodeGen/CGExprConstant.cpp
@@ -1117,6 +1117,11 @@ llvm::Constant *CodeGenModule::EmitNullConstant(QualType T) {
     for (RecordDecl::field_iterator I = RD->field_begin(),
          E = RD->field_end(); I != E; ++I) {
       const FieldDecl *FD = *I;
+      
+      // Ignore bit fields.
+      if (FD->isBitField())
+        continue;
+
       unsigned FieldNo = Layout.getLLVMFieldNo(FD);
       Elements[FieldNo] = EmitNullConstant(FD->getType());
     }

diff --git a/test/CodeGenCXX/pointers-to-data-members.cpp b/test/CodeGenCXX/pointers-to-data-members.cpp
index e0e4e0c02688f615db6d8f01c7aaa67ba614b181..e527c72d49573b3d82fd2b22f15806ffb7cf2ed0 100644 (file)
--- a/test/CodeGenCXX/pointers-to-data-members.cpp
+++ b/test/CodeGenCXX/pointers-to-data-members.cpp
@@ -172,3 +172,14 @@ struct D : C { int A::*i; };
 D d;
 
 }
+
+namespace Test1 {
+
+// Don't crash when A contains a bit-field.
+struct A {
+  int A::* a;
+  int b : 10;
+};
+A a;
+
+}