Fixed expression parser handling of empty strings.

<rdar://problem/12977827>

llvm-svn: 180215

lldb/source/Expression/IRForTarget.cpp

@@ -1465,6 +1465,11 @@ IRForTarget::MaterializeInitializer (uint8_t *data, Constant *initializer)
         }
         return true;
     }
+    else if (isa<ConstantAggregateZero>(initializer))
+    {
+        memset(data, 0, m_target_data->getTypeStoreSize(initializer_type));
+        return true;
+    }
     return false;
 }
 

lldb/test/lang/c/strings/TestCStrings.py

@@ -63,6 +63,9 @@ class CStringsTestCase(TestBase):
                     substrs = ['(char *) $', ' = 0x',
                                'hello'])
 
+        self.expect("p (int)strlen(\"\")",
+                    substrs = ['(int) $', ' = 0'])
+
 if __name__ == '__main__':
     import atexit
     lldb.SBDebugger.Initialize()