--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/analyzer/analyzer-verbosity-2.c	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,222 @@
+/* { dg-additional-options "-fdiagnostics-show-line-numbers -fdiagnostics-path-format=inline-events -fdiagnostics-show-caret -fanalyzer-verbosity=2" } */
+/* { dg-enable-nn-line-numbers "" } */
+
+#include <stdlib.h>
+
+void calls_free_1 (void *ptr)
+{
+  free (ptr); /* { dg-warning "double-'free' of 'ptr'" } */
+}
+
+void test_1 (void *ptr, int a, int b)
+{
+  if (a)
+    calls_free_1 (ptr);
+
+  if (b)
+    {
+    }
+  else
+    calls_free_1 (ptr);
+}
+
+/* { dg-begin-multiline-output "" }
+   NN |   free (ptr);
+      |   ^~~~~~~~~~
+  'test_1': events 1-4
+    |
+    |   NN | void test_1 (void *ptr, int a, int b)
+    |      |      ^~~~~~
+    |      |      |
+    |      |      (1) entry to 'test_1'
+    |   NN | {
+    |   NN |   if (a)
+    |      |      ~
+    |      |      |
+    |      |      (2) following 'true' branch (when 'a != 0')...
+    |   NN |     calls_free_1 (ptr);
+    |      |     ~~~~~~~~~~~~~~~~~~
+    |      |     |
+    |      |     (3) ...to here
+    |      |     (4) calling 'calls_free_1' from 'test_1'
+    |
+    +--> 'calls_free_1': events 5-6
+           |
+           |   NN | void calls_free_1 (void *ptr)
+           |      |      ^~~~~~~~~~~~
+           |      |      |
+           |      |      (5) entry to 'calls_free_1'
+           |   NN | {
+           |   NN |   free (ptr);
+           |      |   ~~~~~~~~~~
+           |      |   |
+           |      |   (6) first 'free' here
+           |
+    <------+
+    |
+  'test_1': events 7-10
+    |
+    |   NN |     calls_free_1 (ptr);
+    |      |     ^~~~~~~~~~~~~~~~~~
+    |      |     |
+    |      |     (7) returning to 'test_1' from 'calls_free_1'
+    |   NN | 
+    |   NN |   if (b)
+    |      |      ~
+    |      |      |
+    |      |      (8) following 'false' branch (when 'b == 0')...
+    |......
+    |   NN |     calls_free_1 (ptr);
+    |      |     ~~~~~~~~~~~~~~~~~~
+    |      |     |
+    |      |     (9) ...to here
+    |      |     (10) passing freed pointer 'ptr' in call to 'calls_free_1' from 'test_1'
+    |
+    +--> 'calls_free_1': events 11-12
+           |
+           |   NN | void calls_free_1 (void *ptr)
+           |      |      ^~~~~~~~~~~~
+           |      |      |
+           |      |      (11) entry to 'calls_free_1'
+           |   NN | {
+           |   NN |   free (ptr);
+           |      |   ~~~~~~~~~~
+           |      |   |
+           |      |   (12) second 'free' here; first 'free' was at (6)
+           |
+  { dg-end-multiline-output "" } */
+
+void calls_free_2 (void *ptr)
+{
+  free (ptr); /* { dg-warning "double-'free' of 'ptr'" } */
+}
+
+void test_2 (void *ptr, int a, int b)
+{
+  switch (a)
+    {
+    default:
+      break;
+    case 1:
+      break;
+    case 3:
+      calls_free_2 (ptr);
+      break;
+    }
+
+  switch (b)
+    {
+    default:
+      calls_free_2 (ptr);
+      break;
+    case 1:
+      break;
+    case 42:
+      break;
+    }
+}
+
+/* { dg-begin-multiline-output "" }
+   NN |   free (ptr);
+      |   ^~~~~~~~~~
+  'test_2': events 1-4
+    |
+    |   NN | void test_2 (void *ptr, int a, int b)
+    |      |      ^~~~~~
+    |      |      |
+    |      |      (1) entry to 'test_2'
+    |   NN | {
+    |   NN |   switch (a)
+    |      |   ~~~~~~
+    |      |   |
+    |      |   (2) following 'case 3:' branch...
+    |......
+    |   NN |     case 3:
+    |      |     ~~~~
+    |      |     |
+    |      |     (3) ...to here
+    |   NN |       calls_free_2 (ptr);
+    |      |       ~~~~~~~~~~~~~~~~~~
+    |      |       |
+    |      |       (4) calling 'calls_free_2' from 'test_2'
+    |
+    +--> 'calls_free_2': events 5-6
+           |
+           |   NN | void calls_free_2 (void *ptr)
+           |      |      ^~~~~~~~~~~~
+           |      |      |
+           |      |      (5) entry to 'calls_free_2'
+           |   NN | {
+           |   NN |   free (ptr);
+           |      |   ~~~~~~~~~~
+           |      |   |
+           |      |   (6) first 'free' here
+           |
+    <------+
+    |
+  'test_2': events 7-10
+    |
+    |   NN |       calls_free_2 (ptr);
+    |      |       ^~~~~~~~~~~~~~~~~~
+    |      |       |
+    |      |       (7) returning to 'test_2' from 'calls_free_2'
+    |......
+    |   NN |   switch (b)
+    |      |   ~~~~~~
+    |      |   |
+    |      |   (8) following 'default:' branch...
+    |   NN |     {
+    |   NN |     default:
+    |      |     ~~~~~~~
+    |      |     |
+    |      |     (9) ...to here
+    |   NN |       calls_free_2 (ptr);
+    |      |       ~~~~~~~~~~~~~~~~~~
+    |      |       |
+    |      |       (10) passing freed pointer 'ptr' in call to 'calls_free_2' from 'test_2'
+    |
+    +--> 'calls_free_2': events 11-12
+           |
+           |   NN | void calls_free_2 (void *ptr)
+           |      |      ^~~~~~~~~~~~
+           |      |      |
+           |      |      (11) entry to 'calls_free_2'
+           |   NN | {
+           |   NN |   free (ptr);
+           |      |   ~~~~~~~~~~
+           |      |   |
+           |      |   (12) second 'free' here; first 'free' was at (6)
+           |
+  { dg-end-multiline-output "" } */
+
+// TODO: range cases
+
+/* The call/return to this function shouldn't appear in the path.  */
+
+void called_by_test_3 (void)
+{
+}
+
+void test_3 (void *ptr)
+{
+  free (ptr);
+  called_by_test_3 ();
+  free (ptr); /* { dg-warning "double-'free' of 'ptr'" } */
+}
+
+/* { dg-begin-multiline-output "" }
+   NN |   free (ptr);
+      |   ^~~~~~~~~~
+  'test_3': events 1-2
+    |
+    |   NN |   free (ptr);
+    |      |   ^~~~~~~~~~
+    |      |   |
+    |      |   (1) first 'free' here
+    |   NN |   called_by_test_3 ();
+    |   NN |   free (ptr);
+    |      |   ~~~~~~~~~~
+    |      |   |
+    |      |   (2) second 'free' here; first 'free' was at (1)
+    |
+  { dg-end-multiline-output "" } */