Fixed a bug where empty C structs were given size
1 by the expression parser.  We now correctly
report that they are of size 0.  (C++ structs
are mandated to have nonzero size, and Clang marks
them as being 1 byte in size.)

<rdar://problem/12380800>

llvm-svn: 166256
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
index bb96eae..0f3ad3e 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -5611,6 +5611,27 @@
                             // No children for this struct/union/class, lets finish it
                             ast.StartTagDeclarationDefinition (clang_type);
                             ast.CompleteTagDeclarationDefinition (clang_type);
+                            
+                            if (tag == DW_TAG_structure_type) // this only applies in C
+                            {
+                                clang::QualType qual_type = clang::QualType::getFromOpaquePtr (clang_type);
+                                const clang::RecordType *record_type = qual_type->getAs<clang::RecordType> ();
+                                
+                                if (record_type)
+                                {
+                                    clang::RecordDecl *record_decl = record_type->getDecl();
+                                    
+                                    if (record_decl)
+                                    {
+                                        LayoutInfo layout_info;
+                                        
+                                        layout_info.alignment = 0;
+                                        layout_info.bit_size = 0;
+                                        
+                                        m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
+                                    }
+                                }
+                            }
                         }
                         else if (clang_type_was_created)
                         {