Index: clang/test/Analysis/exploded-graph-rewriter/l_directory_from_l/win_file_macros.cpp
===================================================================
--- /dev/null
+++ clang/test/Analysis/exploded-graph-rewriter/l_directory_from_l/win_file_macros.cpp
@@ -0,0 +1,28 @@
+// FIXME: Figure out how to use %clang_analyze_cc1 with our lit.local.cfg.
+// RUN: %clang_cc1 -analyze -triple x86_64-unknown-linux-gnu \
+// RUN:                     -analyzer-checker=core \
+// RUN:                     -analyzer-dump-egraph=%t.dot %s
+// RUN: %exploded_graph_rewriter %t.dot | FileCheck %s
+// REQUIRES: asserts
+// UNSUPPORTED: !windows
+
+// This test checks a special case when `\l` can be not only as a new-line symbol,
+// but as a start of the directory name on Windows platform.
+// This occures when using __FILE__ macros.
+
+extern void __assert_fail (__const char *__assertion, __const char *__file,
+    unsigned int __line, __const char *__function)
+     __attribute__ ((__noreturn__));
+#define assert(expr) \
+  ((expr)  ? (void)(0)  : __assert_fail (#expr, __FILE__, __LINE__, __func__))
+  
+int test1(int i)
+{
+  //Here `assert` produces angle brackets and uses __FILE__ macros.
+  assert(i);
+  return i;
+}
+
+// This test is passed if exploded_graph_rewriter handles dot file without errors.
+// CHECK: digraph "ExplodedGraph"
+
Index: clang/utils/analyzer/exploded-graph-rewriter.py
===================================================================
--- clang/utils/analyzer/exploded-graph-rewriter.py
+++ clang/utils/analyzer/exploded-graph-rewriter.py
@@ -368,8 +368,7 @@
                 self.root_id = node_id
             # Note: when writing tests you don't need to escape everything,
             # even though in a valid dot file everything is escaped.
-            node_label = result.group(2).replace('\\l', '') \
-                                        .replace(' ', '') \
+            node_label = result.group(2).replace(' ', '') \
                                         .replace('\\"', '"') \
                                         .replace('\\{', '{') \
                                         .replace('\\}', '}') \
@@ -378,6 +377,15 @@
                                         .replace('\\<', '\\\\<') \
                                         .replace('\\>', '\\\\>') \
                                         .rstrip(',')
+            # Handle `\l` separately for Windows, because macros __FILE__ produces
+            # Windows specific delimiters `\` and sometimes it happens
+            # when directory name starts with the letter `l`.
+            if sys.platform == 'win32':
+                # Find all `\l` (like `,\l`, `}\l`, `[\l`) except `\\l`,
+                # because __FILE__ containes multiple `\` before `\l`.
+                node_label = re.sub(r'(?<!\\)\\l', '', node_label)
+            else:
+                node_label = node_label.replace('\\l', '')
             logging.debug(node_label)
             json_node = json.loads(node_label)
             self.nodes[node_id].construct(node_id, json_node)