1 files changed, 65 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-trees-1.c b/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-trees-1.c
new file mode 100644
index 00000000000..7473a07961f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/plugin/diagnostic-test-show-trees-1.c
@@ -0,0 +1,65 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdiagnostics-show-caret" } */
+
+/* This is an example file for use with
+   diagnostic_plugin_show_trees.c.
+
+   The plugin handles "__show_tree" by recursively dumping
+   the internal structure of the second input argument.
+
+   We want to accept an expression of any type.  To do this in C, we
+   use variadic arguments, but C requires at least one argument before
+   the ellipsis, so we have a dummy one.  */
+
+extern void __show_tree (int dummy, ...);
+
+extern double sqrt (double x);
+
+void test_quadratic (double a, double b, double c)
+{
+  __show_tree (0,
+     (-b + sqrt (b * b - 4 * a * c))
+     / (2 * a));
+
+/* { dg-begin-multiline-output "" }
+      (-b + sqrt (b * b - 4 * a * c))
+      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+      / (2 * a));
+      ^~~~~~~~~
+   { dg-end-multiline-output "" } */
+
+/* { dg-begin-multiline-output "" }
+      (-b + sqrt (b * b - 4 * a * c))
+      ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
+   { dg-end-multiline-output "" } */
+
+/* { dg-begin-multiline-output "" }
+      (-b + sqrt (b * b - 4 * a * c))
+            ^~~~~~~~~~~~~~~~~~~~~~~~
+   { dg-end-multiline-output "" } */
+
+/* { dg-begin-multiline-output "" }
+      (-b + sqrt (b * b - 4 * a * c))
+                  ~~~~~~^~~~~~~~~~~
+   { dg-end-multiline-output "" } */
+
+/* { dg-begin-multiline-output "" }
+      (-b + sqrt (b * b - 4 * a * c))
+                  ~~^~~
+   { dg-end-multiline-output "" } */
+
+/* { dg-begin-multiline-output "" }
+      (-b + sqrt (b * b - 4 * a * c))
+                          ~~~~~~^~~
+   { dg-end-multiline-output "" } */
+
+/* { dg-begin-multiline-output "" }
+      (-b + sqrt (b * b - 4 * a * c))
+                          ~~^~~
+   { dg-end-multiline-output "" } */
+
+/* { dg-begin-multiline-output "" }
+      / (2 * a));
+        ~~~^~~~
+   { dg-end-multiline-output "" } */
+}