Add test 20.

6 files changed, 1426 insertions, 1 deletions

diff --git a/test/Makefile b/test/Makefile
index 5a5398c..293f81a 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -18,7 +18,8 @@ TESTS16 = test16-01 test16-02 test16-03 test16-04
 TESTS17 = test17-01 test17-02 test17-03 test17-04
 TESTS18 = test18-01 test18-02 test18-03 test18-04
 TESTS19 = test19-01 test19-02 test19-03 test19-04
-ALLTESTS = test01 test02 test03 test04 test05 test06 test07 test08 test09 test10 test11 test12 test13 test14 test15 test16 test17 test18 test19 ${TESTS01} ${TESTS02} ${TESTS03} ${TESTS04} ${TESTS05} ${TESTS06} ${TESTS07} ${TESTS08} ${TESTS09} ${TESTS10} ${TESTS11} ${TESTS12} ${TESTS13} ${TESTS14} ${TESTS15} ${TESTS16} ${TESTS17} ${TESTS18} ${TESTS19}
+TESTS20 = test20-01 test20-02 test20-03 test20-04
+ALLTESTS = test01 test02 test03 test04 test05 test06 test07 test08 test09 test10 test11 test12 test13 test14 test15 test16 test17 test18 test19 test20 ${TESTS01} ${TESTS02} ${TESTS03} ${TESTS04} ${TESTS05} ${TESTS06} ${TESTS07} ${TESTS08} ${TESTS09} ${TESTS10} ${TESTS11} ${TESTS12} ${TESTS13} ${TESTS14} ${TESTS15} ${TESTS16} ${TESTS17} ${TESTS18} ${TESTS19} ${TESTS20}
 
 .PHONY: ${ALLTESTS} ${CRASHES} all crashes
 
@@ -222,6 +223,16 @@ test19-03:
 test19-04:
 	$(call CMDXX,detectnullpointers,test19.cpp,test19-04.txt)
 
+test20: ${TESTS20}
+test20-01:
+	$(call CMD,dump,test20.c,test20-01.txt)
+test20-02:
+	$(call CMD,findargs,test20.c,test20-02.txt)
+test20-03:
+	$(call CMD,dumpnullpointers,test20.c,test20-03.txt)
+test20-04:
+	$(call CMD,detectnullpointers,test20.c,test20-04.txt)
+
 crashtest01:
 	$(call CMDXX,dump,crashtest01.h,crashtest01-01.txt)
 crashtest02:
diff --git a/test/test20-01.txt b/test/test20-01.txt
new file mode 100644
index 0000000..7794f4a
--- /dev/null
+++ b/test/test20-01.txt
@@ -0,0 +1,906 @@
+function_decl func1 test20.c 8:5
+- isPublic: 1
+ function_type - function type
+  integer_type - function return type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  tree_list - arg types
+   pointer_type - value
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+   tree_list - chain
+    pointer_type - value
+     record_type - nested type
+      identifier_node Data1 - type name
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+    tree_list - chain
+     void_type - value
+      type_decl void - type name
+ result_decl test20.c 8:5 - function result
+ - isAutogenerated: 1
+  integer_type - result type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  integer_cst 32 - decl size
+ - isUsed: 1
+ parm_decl ptr1 test20.c 8:25 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ parm_decl ptr2 test20.c 8:45 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ bind_expr test20.c 9:1 - code
+  var_decl ptr3 test20.c 10:19 - operand
+   integer_cst 64 - decl size
+   - isUsed: 1
+   parm_decl ptr1 test20.c 8:25 - initial
+   pointer_type - var type
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+  decl_expr test20.c 10:19 - operand
+   var_decl ptr3 test20.c 10:19 - operand
+  block - operand
+   var_decl ptr3 test20.c 10:19 - block vars
+function_decl func2 test20.c 13:5
+- isPublic: 1
+ function_type - function type
+  integer_type - function return type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  tree_list - arg types
+   pointer_type - value
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+   tree_list - chain
+    pointer_type - value
+     record_type - nested type
+      identifier_node Data1 - type name
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+    tree_list - chain
+     void_type - value
+      type_decl void - type name
+ result_decl test20.c 13:5 - function result
+ - isAutogenerated: 1
+  integer_type - result type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  integer_cst 32 - decl size
+ - isUsed: 1
+ parm_decl ptr1 test20.c 13:25 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ parm_decl ptr2 test20.c 13:45 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ bind_expr test20.c 14:1 - code
+  var_decl ptr3 test20.c 15:19 - operand
+  - isUsed: 1
+   integer_cst 64 - decl size
+   - isUsed: 1
+   parm_decl ptr1 test20.c 13:25 - initial
+   pointer_type - var type
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+  statement_list - operand
+   decl_expr test20.c 15:19 - statement
+    var_decl ptr3 test20.c 15:19 - operand
+    - isUsed: 1
+   modify_expr test20.c 16:15 - statement
+    component_ref test20.c 16:9 - operand
+     indirect_ref test20.c 16:9 - object
+      var_decl ptr3 test20.c 15:19 - ref
+      - isUsed: 1
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+    integer_cst 100 - operand
+  block - operand
+   var_decl ptr3 test20.c 15:19 - block vars
+   - isUsed: 1
+function_decl func3 test20.c 19:5
+- isPublic: 1
+ function_type - function type
+  integer_type - function return type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  tree_list - arg types
+   pointer_type - value
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+   tree_list - chain
+    pointer_type - value
+     record_type - nested type
+      identifier_node Data1 - type name
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+    tree_list - chain
+     void_type - value
+      type_decl void - type name
+ result_decl test20.c 19:5 - function result
+ - isAutogenerated: 1
+  integer_type - result type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  integer_cst 32 - decl size
+ - isUsed: 1
+ parm_decl ptr1 test20.c 19:25 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ parm_decl ptr2 test20.c 19:45 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ bind_expr test20.c 20:1 - code
+  var_decl ptr3 test20.c 21:19 - operand
+  - isUsed: 1
+   integer_cst 64 - decl size
+   - isUsed: 1
+   parm_decl ptr1 test20.c 19:25 - initial
+   pointer_type - var type
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+  statement_list - operand
+   decl_expr test20.c 21:19 - statement
+    var_decl ptr3 test20.c 21:19 - operand
+    - isUsed: 1
+   cond_expr test20.c 22:8 - statement
+    ne_expr test20.c 22:9 - operand
+     var_decl ptr3 test20.c 21:19 - operand
+     - isUsed: 1
+     integer_cst 0 - operand
+    modify_expr test20.c 23:19 - operand
+     component_ref test20.c 23:13 - operand
+      indirect_ref test20.c 23:13 - object
+       var_decl ptr3 test20.c 21:19 - ref
+       - isUsed: 1
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+     integer_cst 100 - operand
+  block - operand
+   var_decl ptr3 test20.c 21:19 - block vars
+   - isUsed: 1
+function_decl func4 test20.c 26:5
+- isPublic: 1
+ function_type - function type
+  integer_type - function return type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  tree_list - arg types
+   pointer_type - value
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+   tree_list - chain
+    pointer_type - value
+     record_type - nested type
+      identifier_node Data1 - type name
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+    tree_list - chain
+     void_type - value
+      type_decl void - type name
+ result_decl test20.c 26:5 - function result
+ - isAutogenerated: 1
+  integer_type - result type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  integer_cst 32 - decl size
+ - isUsed: 1
+ parm_decl ptr1 test20.c 26:25 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ - isUsed: 1
+ parm_decl ptr2 test20.c 26:45 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ bind_expr test20.c 27:1 - code
+  var_decl ptr3 test20.c 28:19 - operand
+  - isUsed: 1
+   integer_cst 64 - decl size
+   - isUsed: 1
+   parm_decl ptr1 test20.c 26:25 - initial
+   pointer_type - var type
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+  statement_list - operand
+   decl_expr test20.c 28:19 - statement
+    var_decl ptr3 test20.c 28:19 - operand
+    - isUsed: 1
+   cond_expr test20.c 29:8 - statement
+    ne_expr test20.c 29:9 - operand
+     var_decl ptr3 test20.c 28:19 - operand
+     - isUsed: 1
+     integer_cst 0 - operand
+    modify_expr test20.c 30:19 - operand
+     component_ref test20.c 30:13 - operand
+      indirect_ref test20.c 30:13 - object
+       var_decl ptr3 test20.c 28:19 - ref
+       - isUsed: 1
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+     integer_cst 100 - operand
+    cond_expr test20.c 31:13 - operand
+     truth_andif_expr test20.c 31:20 - operand
+      eq_expr test20.c 31:14 - operand
+       - isUsed: 1
+       parm_decl ptr1 test20.c 26:25 - operand
+        pointer_type - decl type
+         record_type - nested type
+          identifier_node Data1 - type name
+          field_decl val test20.c 3:9 - field
+          - signed
+           integer_cst 32 - decl size
+        integer_cst 64 - parm size
+       integer_cst 0 - operand
+      ne_expr test20.c 31:20 - operand
+       - isUsed: 1
+       parm_decl ptr2 test20.c 26:45 - operand
+        pointer_type - decl type
+         record_type - nested type
+          identifier_node Data1 - type name
+          field_decl val test20.c 3:9 - field
+          - signed
+           integer_cst 32 - decl size
+        integer_cst 64 - parm size
+       integer_cst 0 - operand
+     modify_expr test20.c 32:19 - operand
+      component_ref test20.c 32:13 - operand
+       indirect_ref test20.c 32:13 - object
+        - isUsed: 1
+        parm_decl ptr2 test20.c 26:45 - ref
+         pointer_type - decl type
+          record_type - nested type
+           identifier_node Data1 - type name
+           field_decl val test20.c 3:9 - field
+           - signed
+            integer_cst 32 - decl size
+         integer_cst 64 - parm size
+       field_decl val test20.c 3:9 - field
+       - signed
+        integer_cst 32 - decl size
+      integer_cst 200 - operand
+  block - operand
+   var_decl ptr3 test20.c 28:19 - block vars
+   - isUsed: 1
+function_decl func5 test20.c 35:5
+- isPublic: 1
+ function_type - function type
+  integer_type - function return type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  tree_list - arg types
+   pointer_type - value
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+   tree_list - chain
+    pointer_type - value
+     record_type - nested type
+      identifier_node Data1 - type name
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+    tree_list - chain
+     void_type - value
+      type_decl void - type name
+ result_decl test20.c 35:5 - function result
+ - isAutogenerated: 1
+  integer_type - result type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  integer_cst 32 - decl size
+ - isUsed: 1
+ parm_decl ptr1 test20.c 35:25 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ parm_decl ptr2 test20.c 35:45 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ bind_expr test20.c 36:1 - code
+  var_decl ptr3 test20.c 40:19 - operand
+  - isUsed: 1
+   integer_cst 64 - decl size
+   - isUsed: 1
+   parm_decl ptr1 test20.c 35:25 - initial
+   pointer_type - var type
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+  statement_list - operand
+   cond_expr test20.c 37:8 - statement
+    truth_orif_expr test20.c 37:15 - operand
+     eq_expr test20.c 37:9 - operand
+      - isUsed: 1
+      parm_decl ptr1 test20.c 35:25 - operand
+       pointer_type - decl type
+        record_type - nested type
+         identifier_node Data1 - type name
+         field_decl val test20.c 3:9 - field
+         - signed
+          integer_cst 32 - decl size
+       integer_cst 64 - parm size
+      integer_cst 0 - operand
+     eq_expr test20.c 37:20 - operand
+      var_decl k test20.c 6:5 - operand
+      - isUsed: 1
+       integer_cst 32 - decl size
+       integer_type - var type
+       - precisionBits: 32
+       - signed
+        type_decl int - type name
+        integer_cst 32 - type size
+        integer_cst -2147483648 - min value
+        integer_cst 2147483647 - max value
+      integer_cst 10 - operand
+    return_expr test20.c 38:16 - operand
+     modify_expr test20.c 38:16 - operand
+      result_decl test20.c 35:5 - operand
+      - isAutogenerated: 1
+       integer_type - result type
+       - precisionBits: 32
+       - signed
+        type_decl int - type name
+        integer_cst 32 - type size
+        integer_cst -2147483648 - min value
+        integer_cst 2147483647 - max value
+       integer_cst 32 - decl size
+      integer_cst 0 - operand
+   decl_expr test20.c 40:19 - statement
+    var_decl ptr3 test20.c 40:19 - operand
+    - isUsed: 1
+   modify_expr test20.c 42:15 - statement
+    component_ref test20.c 42:9 - operand
+     indirect_ref test20.c 42:9 - object
+      var_decl ptr3 test20.c 40:19 - ref
+      - isUsed: 1
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+    integer_cst 100 - operand
+  block - operand
+   var_decl ptr3 test20.c 40:19 - block vars
+   - isUsed: 1
+function_decl func6 test20.c 45:5
+- isPublic: 1
+ function_type - function type
+  integer_type - function return type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  tree_list - arg types
+   pointer_type - value
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+   tree_list - chain
+    pointer_type - value
+     record_type - nested type
+      identifier_node Data1 - type name
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+    tree_list - chain
+     void_type - value
+      type_decl void - type name
+ result_decl test20.c 45:5 - function result
+ - isAutogenerated: 1
+  integer_type - result type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  integer_cst 32 - decl size
+ - isUsed: 1
+ parm_decl ptr1 test20.c 45:25 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ parm_decl ptr2 test20.c 45:45 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ bind_expr test20.c 46:1 - code
+  var_decl ptr3 test20.c 50:19 - operand
+  - isUsed: 1
+   integer_cst 64 - decl size
+   - isUsed: 1
+   parm_decl ptr1 test20.c 45:25 - initial
+   pointer_type - var type
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+  statement_list - operand
+   cond_expr test20.c 47:8 - statement
+    truth_orif_expr test20.c 47:14 - operand
+     ne_expr test20.c 47:9 - operand
+      - isUsed: 1
+      parm_decl ptr1 test20.c 45:25 - operand
+       pointer_type - decl type
+        record_type - nested type
+         identifier_node Data1 - type name
+         field_decl val test20.c 3:9 - field
+         - signed
+          integer_cst 32 - decl size
+       integer_cst 64 - parm size
+      integer_cst 0 - operand
+     eq_expr test20.c 47:19 - operand
+      var_decl k test20.c 6:5 - operand
+      - isUsed: 1
+       integer_cst 32 - decl size
+       integer_type - var type
+       - precisionBits: 32
+       - signed
+        type_decl int - type name
+        integer_cst 32 - type size
+        integer_cst -2147483648 - min value
+        integer_cst 2147483647 - max value
+      integer_cst 10 - operand
+    return_expr test20.c 48:16 - operand
+     modify_expr test20.c 48:16 - operand
+      result_decl test20.c 45:5 - operand
+      - isAutogenerated: 1
+       integer_type - result type
+       - precisionBits: 32
+       - signed
+        type_decl int - type name
+        integer_cst 32 - type size
+        integer_cst -2147483648 - min value
+        integer_cst 2147483647 - max value
+       integer_cst 32 - decl size
+      integer_cst 0 - operand
+   decl_expr test20.c 50:19 - statement
+    var_decl ptr3 test20.c 50:19 - operand
+    - isUsed: 1
+   modify_expr test20.c 52:15 - statement
+    component_ref test20.c 52:9 - operand
+     indirect_ref test20.c 52:9 - object
+      var_decl ptr3 test20.c 50:19 - ref
+      - isUsed: 1
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+    integer_cst 100 - operand
+  block - operand
+   var_decl ptr3 test20.c 50:19 - block vars
+   - isUsed: 1
+function_decl func7 test20.c 55:5
+- isPublic: 1
+ function_type - function type
+  integer_type - function return type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  tree_list - arg types
+   pointer_type - value
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+   tree_list - chain
+    pointer_type - value
+     record_type - nested type
+      identifier_node Data1 - type name
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+    tree_list - chain
+     void_type - value
+      type_decl void - type name
+ result_decl test20.c 55:5 - function result
+ - isAutogenerated: 1
+  integer_type - result type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  integer_cst 32 - decl size
+ - isUsed: 1
+ parm_decl ptr1 test20.c 55:25 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ parm_decl ptr2 test20.c 55:45 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ bind_expr test20.c 56:1 - code
+  var_decl c test20.c 57:9 - operand
+  - isUsed: 1
+   integer_cst 32 - decl size
+   integer_type - var type
+   - precisionBits: 32
+   - signed
+    type_decl int - type name
+    integer_cst 32 - type size
+    integer_cst -2147483648 - min value
+    integer_cst 2147483647 - max value
+  statement_list - operand
+   decl_expr test20.c 57:9 - statement
+    var_decl c test20.c 57:9 - operand
+    - isUsed: 1
+   cond_expr test20.c 58:8 - statement
+    ne_expr test20.c 58:11 - operand
+     var_decl k test20.c 6:5 - operand
+     - isUsed: 1
+      integer_cst 32 - decl size
+      integer_type - var type
+      - precisionBits: 32
+      - signed
+       type_decl int - type name
+       integer_cst 32 - type size
+       integer_cst -2147483648 - min value
+       integer_cst 2147483647 - max value
+     var_decl c test20.c 57:9 - operand
+     - isUsed: 1
+    cond_expr test20.c 60:12 - operand
+     eq_expr test20.c 60:13 - operand
+      - isUsed: 1
+      parm_decl ptr1 test20.c 55:25 - operand
+       pointer_type - decl type
+        record_type - nested type
+         identifier_node Data1 - type name
+         field_decl val test20.c 3:9 - field
+         - signed
+          integer_cst 32 - decl size
+       integer_cst 64 - parm size
+      integer_cst 0 - operand
+     return_expr test20.c 61:20 - operand
+      modify_expr test20.c 61:20 - operand
+       result_decl test20.c 55:5 - operand
+       - isAutogenerated: 1
+        integer_type - result type
+        - precisionBits: 32
+        - signed
+         type_decl int - type name
+         integer_cst 32 - type size
+         integer_cst -2147483648 - min value
+         integer_cst 2147483647 - max value
+        integer_cst 32 - decl size
+       integer_cst 0 - operand
+   decl_expr test20.c 64:19 - statement
+    var_decl ptr3 test20.c 64:19 - operand
+    - isUsed: 1
+     integer_cst 64 - decl size
+     - isUsed: 1
+     parm_decl ptr1 test20.c 55:25 - initial
+     pointer_type - var type
+      record_type - nested type
+       identifier_node Data1 - type name
+       field_decl val test20.c 3:9 - field
+       - signed
+        integer_cst 32 - decl size
+   modify_expr test20.c 66:15 - statement
+    component_ref test20.c 66:9 - operand
+     indirect_ref test20.c 66:9 - object
+      - isUsed: 1
+      parm_decl ptr1 test20.c 55:25 - ref
+       pointer_type - decl type
+        record_type - nested type
+         identifier_node Data1 - type name
+         field_decl val test20.c 3:9 - field
+         - signed
+          integer_cst 32 - decl size
+       integer_cst 64 - parm size
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+    integer_cst 100 - operand
+   modify_expr test20.c 67:15 - statement
+    component_ref test20.c 67:9 - operand
+     indirect_ref test20.c 67:9 - object
+      var_decl ptr3 test20.c 64:19 - ref
+      - isUsed: 1
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+    integer_cst 200 - operand
+  block - operand
+   var_decl c test20.c 57:9 - block vars
+   - isUsed: 1
+   var_decl ptr3 test20.c 64:19 - block vars
+   - isUsed: 1
+function_decl func8 test20.c 70:5
+- isPublic: 1
+ function_type - function type
+  integer_type - function return type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  tree_list - arg types
+   pointer_type - value
+    record_type - nested type
+     identifier_node Data1 - type name
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+   tree_list - chain
+    pointer_type - value
+     record_type - nested type
+      identifier_node Data1 - type name
+      field_decl val test20.c 3:9 - field
+      - signed
+       integer_cst 32 - decl size
+    tree_list - chain
+     void_type - value
+      type_decl void - type name
+ result_decl test20.c 70:5 - function result
+ - isAutogenerated: 1
+  integer_type - result type
+  - precisionBits: 32
+  - signed
+   type_decl int - type name
+   integer_cst 32 - type size
+   integer_cst -2147483648 - min value
+   integer_cst 2147483647 - max value
+  integer_cst 32 - decl size
+ - isUsed: 1
+ parm_decl ptr1 test20.c 70:25 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ parm_decl ptr2 test20.c 70:45 - argument
+  pointer_type - decl type
+   record_type - nested type
+    identifier_node Data1 - type name
+    field_decl val test20.c 3:9 - field
+    - signed
+     integer_cst 32 - decl size
+  integer_cst 64 - parm size
+ bind_expr test20.c 71:1 - code
+  var_decl c test20.c 72:9 - operand
+  - isUsed: 1
+   integer_cst 32 - decl size
+   integer_type - var type
+   - precisionBits: 32
+   - signed
+    type_decl int - type name
+    integer_cst 32 - type size
+    integer_cst -2147483648 - min value
+    integer_cst 2147483647 - max value
+  statement_list - operand
+   decl_expr test20.c 72:9 - statement
+    var_decl c test20.c 72:9 - operand
+    - isUsed: 1
+   cond_expr test20.c 73:8 - statement
+    ne_expr test20.c 73:11 - operand
+     var_decl k test20.c 6:5 - operand
+     - isUsed: 1
+      integer_cst 32 - decl size
+      integer_type - var type
+      - precisionBits: 32
+      - signed
+       type_decl int - type name
+       integer_cst 32 - type size
+       integer_cst -2147483648 - min value
+       integer_cst 2147483647 - max value
+     var_decl c test20.c 72:9 - operand
+     - isUsed: 1
+    cond_expr test20.c 75:12 - operand
+     ne_expr test20.c 75:13 - operand
+      - isUsed: 1
+      parm_decl ptr1 test20.c 70:25 - operand
+       pointer_type - decl type
+        record_type - nested type
+         identifier_node Data1 - type name
+         field_decl val test20.c 3:9 - field
+         - signed
+          integer_cst 32 - decl size
+       integer_cst 64 - parm size
+      integer_cst 0 - operand
+     return_expr test20.c 76:20 - operand
+      modify_expr test20.c 76:20 - operand
+       result_decl test20.c 70:5 - operand
+       - isAutogenerated: 1
+        integer_type - result type
+        - precisionBits: 32
+        - signed
+         type_decl int - type name
+         integer_cst 32 - type size
+         integer_cst -2147483648 - min value
+         integer_cst 2147483647 - max value
+        integer_cst 32 - decl size
+       integer_cst 0 - operand
+   decl_expr test20.c 79:19 - statement
+    var_decl ptr3 test20.c 79:19 - operand
+    - isUsed: 1
+     integer_cst 64 - decl size
+     - isUsed: 1
+     parm_decl ptr1 test20.c 70:25 - initial
+     pointer_type - var type
+      record_type - nested type
+       identifier_node Data1 - type name
+       field_decl val test20.c 3:9 - field
+       - signed
+        integer_cst 32 - decl size
+   modify_expr test20.c 81:15 - statement
+    component_ref test20.c 81:9 - operand
+     indirect_ref test20.c 81:9 - object
+      - isUsed: 1
+      parm_decl ptr1 test20.c 70:25 - ref
+       pointer_type - decl type
+        record_type - nested type
+         identifier_node Data1 - type name
+         field_decl val test20.c 3:9 - field
+         - signed
+          integer_cst 32 - decl size
+       integer_cst 64 - parm size
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+    integer_cst 100 - operand
+   modify_expr test20.c 82:15 - statement
+    component_ref test20.c 82:9 - operand
+     indirect_ref test20.c 82:9 - object
+      var_decl ptr3 test20.c 79:19 - ref
+      - isUsed: 1
+     field_decl val test20.c 3:9 - field
+     - signed
+      integer_cst 32 - decl size
+    integer_cst 200 - operand
+  block - operand
+   var_decl c test20.c 72:9 - block vars
+   - isUsed: 1
+   var_decl ptr3 test20.c 79:19 - block vars
+   - isUsed: 1
diff --git a/test/test20-02.txt b/test/test20-02.txt
new file mode 100644
index 0000000..f1fa1ce
--- /dev/null
+++ b/test/test20-02.txt
@@ -0,0 +1,8 @@
+func1: pointer_type ptr1, pointer_type ptr2, 
+func2: pointer_type ptr1, pointer_type ptr2, 
+func3: pointer_type ptr1, pointer_type ptr2, 
+func4: pointer_type ptr1, pointer_type ptr2, 
+func5: pointer_type ptr1, pointer_type ptr2, 
+func6: pointer_type ptr1, pointer_type ptr2, 
+func7: pointer_type ptr1, pointer_type ptr2, 
+func8: pointer_type ptr1, pointer_type ptr2, 
diff --git a/test/test20-03.txt b/test/test20-03.txt
new file mode 100644
index 0000000..9f86a10
--- /dev/null
+++ b/test/test20-03.txt
@@ -0,0 +1,395 @@
+function_decl func1: 
+bind_expr : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+decl_expr : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+block : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+function_decl func2: 
+bind_expr : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+statement_list : ptr1, ptr2, ptr3, 
+decl_expr : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, ptr3, 
+component_ref : ptr1, ptr2, ptr3, 
+test20.c: In function 'func2':
+test20.c:16:9: warning: Using variable 'ptr3' without checking for null pointer
+     ptr3->val = 100;
+         ^
+indirect_ref : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 100: ptr1, ptr2, ptr3, 
+block : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+function_decl func3: 
+bind_expr : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+statement_list : ptr1, ptr2, ptr3, 
+decl_expr : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+cond_expr : ptr1, ptr2, ptr3, 
+ne_expr : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 0: ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, 
+component_ref : ptr1, ptr2, 
+indirect_ref : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, 
+field_decl val: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst 100: ptr1, ptr2, 
+block : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+function_decl func4: 
+bind_expr : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+statement_list : ptr1, ptr2, ptr3, 
+decl_expr : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+cond_expr : ptr1, ptr2, ptr3, 
+ne_expr : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 0: ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, 
+component_ref : ptr1, ptr2, 
+indirect_ref : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, 
+field_decl val: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst 100: ptr1, ptr2, 
+cond_expr : ptr1, ptr2, ptr3, 
+truth_andif_expr : ptr1, ptr2, ptr3, 
+eq_expr : ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+integer_cst 0: ptr1, ptr2, ptr3, 
+ne_expr : ptr1, ptr2, ptr3, 
+parm_decl ptr2: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+integer_cst 0: ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr3, 
+component_ref : ptr1, ptr3, 
+indirect_ref : ptr1, ptr3, 
+parm_decl ptr2: ptr1, ptr3, 
+pointer_type : ptr1, ptr3, 
+record_type : ptr1, ptr3, 
+identifier_node Data1: ptr1, ptr3, 
+field_decl val: ptr1, ptr3, 
+integer_cst 32: ptr1, ptr3, 
+integer_cst 64: ptr1, ptr3, 
+field_decl val: ptr1, ptr3, 
+integer_cst 32: ptr1, ptr3, 
+integer_cst 200: ptr1, ptr3, 
+block : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+function_decl func5: 
+bind_expr : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+statement_list : ptr1, ptr2, ptr3, 
+cond_expr : ptr1, ptr2, ptr3, 
+truth_orif_expr : ptr1, ptr2, ptr3, 
+eq_expr : ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+integer_cst 0: ptr1, ptr2, ptr3, 
+eq_expr : ptr2, 
+var_decl k: ptr2, ptr3, 
+integer_cst 32: ptr2, ptr3, 
+integer_type : ptr2, ptr3, 
+type_decl int: ptr2, ptr3, 
+integer_cst 32: ptr2, ptr3, 
+integer_cst -2147483648: ptr2, ptr3, 
+integer_cst 2147483647: ptr2, ptr3, 
+integer_cst 10: ptr2, ptr3, 
+return_expr : ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, ptr3, 
+result_decl : ptr1, ptr2, ptr3, 
+integer_type : ptr1, ptr2, ptr3, 
+type_decl int: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst -2147483648: ptr1, ptr2, ptr3, 
+integer_cst 2147483647: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 0: ptr1, ptr2, ptr3, 
+decl_expr : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr2, ptr3, 
+modify_expr : ptr1, ptr2, ptr3, 
+component_ref : ptr2, ptr3, 
+indirect_ref : ptr2, ptr3, 
+var_decl ptr3: ptr2, ptr3, 
+field_decl val: ptr2, ptr3, 
+integer_cst 32: ptr2, ptr3, 
+integer_cst 100: ptr2, ptr3, 
+block : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr2, ptr3, 
+function_decl func6: 
+bind_expr : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+statement_list : ptr1, ptr2, ptr3, 
+cond_expr : ptr1, ptr2, ptr3, 
+truth_orif_expr : ptr1, ptr2, ptr3, 
+ne_expr : ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+integer_cst 0: ptr1, ptr2, ptr3, 
+eq_expr : ptr1, ptr2, ptr3, 
+var_decl k: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_type : ptr1, ptr2, ptr3, 
+type_decl int: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst -2147483648: ptr1, ptr2, ptr3, 
+integer_cst 2147483647: ptr1, ptr2, ptr3, 
+integer_cst 10: ptr1, ptr2, ptr3, 
+return_expr : ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, ptr3, 
+result_decl : ptr1, ptr2, ptr3, 
+integer_type : ptr1, ptr2, ptr3, 
+type_decl int: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst -2147483648: ptr1, ptr2, ptr3, 
+integer_cst 2147483647: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 0: ptr1, ptr2, ptr3, 
+decl_expr : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, ptr3, 
+component_ref : ptr1, ptr2, ptr3, 
+test20.c: In function 'func6':
+test20.c:52:9: warning: Using variable 'ptr3' without checking for null pointer
+     ptr3->val = 100;
+         ^
+indirect_ref : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 100: ptr1, ptr2, ptr3, 
+block : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+function_decl func7: 
+bind_expr : ptr1, ptr2, 
+var_decl c: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_type : ptr1, ptr2, 
+type_decl int: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst -2147483648: ptr1, ptr2, 
+integer_cst 2147483647: ptr1, ptr2, 
+statement_list : ptr1, ptr2, 
+decl_expr : ptr1, ptr2, 
+var_decl c: ptr1, ptr2, 
+cond_expr : ptr1, ptr2, 
+ne_expr : ptr1, ptr2, 
+var_decl k: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_type : ptr1, ptr2, 
+type_decl int: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst -2147483648: ptr1, ptr2, 
+integer_cst 2147483647: ptr1, ptr2, 
+var_decl c: ptr1, ptr2, 
+cond_expr : ptr1, ptr2, 
+eq_expr : ptr1, ptr2, 
+parm_decl ptr1: ptr1, ptr2, 
+pointer_type : ptr1, ptr2, 
+record_type : ptr1, ptr2, 
+identifier_node Data1: ptr1, ptr2, 
+field_decl val: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst 64: ptr1, ptr2, 
+integer_cst 0: ptr1, ptr2, 
+return_expr : ptr1, ptr2, 
+modify_expr : ptr1, ptr2, 
+result_decl : ptr1, ptr2, 
+integer_type : ptr1, ptr2, 
+type_decl int: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst -2147483648: ptr1, ptr2, 
+integer_cst 2147483647: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst 0: ptr1, ptr2, 
+decl_expr : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, 
+component_ref : ptr1, ptr2, ptr3, 
+test20.c: In function 'func7':
+test20.c:66:9: warning: Using parameter 'ptr1' without checking for null pointer
+     ptr1->val = 100;
+         ^
+indirect_ref : ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 100: ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, 
+component_ref : ptr1, ptr2, ptr3, 
+test20.c:67:9: warning: Using variable 'ptr3' without checking for null pointer
+     ptr3->val = 200;
+         ^
+indirect_ref : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 200: ptr1, ptr2, ptr3, 
+block : ptr1, ptr2, 
+var_decl c: ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+function_decl func8: 
+bind_expr : ptr1, ptr2, 
+var_decl c: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_type : ptr1, ptr2, 
+type_decl int: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst -2147483648: ptr1, ptr2, 
+integer_cst 2147483647: ptr1, ptr2, 
+statement_list : ptr1, ptr2, 
+decl_expr : ptr1, ptr2, 
+var_decl c: ptr1, ptr2, 
+cond_expr : ptr1, ptr2, 
+ne_expr : ptr1, ptr2, 
+var_decl k: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_type : ptr1, ptr2, 
+type_decl int: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst -2147483648: ptr1, ptr2, 
+integer_cst 2147483647: ptr1, ptr2, 
+var_decl c: ptr1, ptr2, 
+cond_expr : ptr1, ptr2, 
+ne_expr : ptr1, ptr2, 
+parm_decl ptr1: ptr1, ptr2, 
+pointer_type : ptr1, ptr2, 
+record_type : ptr1, ptr2, 
+identifier_node Data1: ptr1, ptr2, 
+field_decl val: ptr1, ptr2, 
+integer_cst 32: ptr1, ptr2, 
+integer_cst 64: ptr1, ptr2, 
+integer_cst 0: ptr1, ptr2, 
+return_expr : ptr2, 
+modify_expr : ptr2, 
+result_decl : ptr2, 
+integer_type : ptr2, 
+type_decl int: ptr2, 
+integer_cst 32: ptr2, 
+integer_cst -2147483648: ptr2, 
+integer_cst 2147483647: ptr2, 
+integer_cst 32: ptr2, 
+integer_cst 0: ptr2, 
+decl_expr : ptr1, ptr2, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, 
+component_ref : ptr1, ptr2, ptr3, 
+test20.c: In function 'func8':
+test20.c:81:9: warning: Using parameter 'ptr1' without checking for null pointer
+     ptr1->val = 100;
+         ^
+indirect_ref : ptr1, ptr2, ptr3, 
+parm_decl ptr1: ptr1, ptr2, ptr3, 
+pointer_type : ptr1, ptr2, ptr3, 
+record_type : ptr1, ptr2, ptr3, 
+identifier_node Data1: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 64: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 100: ptr1, ptr2, ptr3, 
+modify_expr : ptr1, ptr2, 
+component_ref : ptr1, ptr2, ptr3, 
+test20.c:82:9: warning: Using variable 'ptr3' without checking for null pointer
+     ptr3->val = 200;
+         ^
+indirect_ref : ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
+field_decl val: ptr1, ptr2, ptr3, 
+integer_cst 32: ptr1, ptr2, ptr3, 
+integer_cst 200: ptr1, ptr2, ptr3, 
+block : ptr1, ptr2, 
+var_decl c: ptr1, ptr2, ptr3, 
+var_decl ptr3: ptr1, ptr2, ptr3, 
diff --git a/test/test20-04.txt b/test/test20-04.txt
new file mode 100644
index 0000000..a20e98d
--- /dev/null
+++ b/test/test20-04.txt
@@ -0,0 +1,22 @@
+test20.c: In function 'func2':
+test20.c:16:9: warning: Using variable 'ptr3' without checking for null pointer
+     ptr3->val = 100;
+         ^
+test20.c: In function 'func6':
+test20.c:52:9: warning: Using variable 'ptr3' without checking for null pointer
+     ptr3->val = 100;
+         ^
+test20.c: In function 'func7':
+test20.c:66:9: warning: Using parameter 'ptr1' without checking for null pointer
+     ptr1->val = 100;
+         ^
+test20.c:67:9: warning: Using variable 'ptr3' without checking for null pointer
+     ptr3->val = 200;
+         ^
+test20.c: In function 'func8':
+test20.c:81:9: warning: Using parameter 'ptr1' without checking for null pointer
+     ptr1->val = 100;
+         ^
+test20.c:82:9: warning: Using variable 'ptr3' without checking for null pointer
+     ptr3->val = 200;
+         ^
diff --git a/test/test20.c b/test/test20.c
new file mode 100644
index 0000000..671be3c
--- /dev/null
+++ b/test/test20.c
@@ -0,0 +1,83 @@
+struct Data1
+{
+    int val;
+};
+
+int k;
+
+int func1(struct Data1 *ptr1, struct Data1 *ptr2)
+{
+    struct Data1 *ptr3 = ptr1;
+}
+
+int func2(struct Data1 *ptr1, struct Data1 *ptr2)
+{
+    struct Data1 *ptr3 = ptr1;
+    ptr3->val = 100;
+}
+
+int func3(struct Data1 *ptr1, struct Data1 *ptr2)
+{
+    struct Data1 *ptr3 = ptr1;
+    if (ptr3)
+        ptr3->val = 100;
+}
+
+int func4(struct Data1 *ptr1, struct Data1 *ptr2)
+{
+    struct Data1 *ptr3 = ptr1;
+    if (ptr3)
+        ptr3->val = 100;
+    else if (!ptr1 && ptr2)
+        ptr2->val = 200;
+}
+
+int func5(struct Data1 *ptr1, struct Data1 *ptr2)
+{
+    if (!ptr1 || k == 10)
+        return 0;
+
+    struct Data1 *ptr3 = ptr1;
+
+    ptr3->val = 100;
+}
+
+int func6(struct Data1 *ptr1, struct Data1 *ptr2)
+{
+    if (ptr1 || k == 10)
+        return 0;
+
+    struct Data1 *ptr3 = ptr1;
+
+    ptr3->val = 100;
+}
+
+int func7(struct Data1 *ptr1, struct Data1 *ptr2)
+{
+    int c;
+    if (k != c)
+    {
+        if (!ptr1)
+            return 0;
+    }
+
+    struct Data1 *ptr3 = ptr1;
+
+    ptr1->val = 100;
+    ptr3->val = 200;
+}
+
+int func8(struct Data1 *ptr1, struct Data1 *ptr2)
+{
+    int c;
+    if (k != c)
+    {
+        if (ptr1)
+            return 0;
+    }
+
+    struct Data1 *ptr3 = ptr1;
+
+    ptr1->val = 100;
+    ptr3->val = 200;
+}