1 files changed, 34 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/cpp/trigraphs.c b/gcc/testsuite/gcc.dg/cpp/trigraphs.c
new file mode 100644
index 000000000..3ec5ed721
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trigraphs.c
@@ -0,0 +1,34 @@
+/* { dg-do run } */
+/* { dg-options "-ansi" } */
+
+extern void abort (void);
+
+/* Basic tests for trigraph conversion.
+   All of them are here, but not in all possible contexts.  *??/
+/
+
+??=include <stdio.h>
+
+??=define TWELVE 1??/
+2
+
+static const char str??(??) = "0123456789??/n";
+
+int
+main(void)
+??<
+  unsigned char x = 5;
+
+  if (sizeof str != TWELVE)
+    abort ();
+
+  /* Test ^=, the only multi-character token to come from trigraphs.  */
+  x ??'= 3;
+  if (x != 6)
+    abort ();
+
+  if ((5 ??! 3) != 7)
+    abort ();
+
+  return 0;
+??>