1 files changed, 78 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/string-opt-10.c b/gcc/testsuite/gcc.c-torture/execute/string-opt-10.c
new file mode 100644
index 0000000..3949bb8
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/string-opt-10.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 2000  Free Software Foundation.
+
+   Ensure all expected transformations of builtin strncat occur and
+   perform correctly.
+
+   Written by Kaveh R. Ghazi, 11/27/2000.  */
+
+extern void abort (void);
+typedef __SIZE_TYPE__ size_t;
+extern char *strncat (char *, const char *, size_t);
+extern char *strcpy (char *, const char *);
+extern char *strcmp (const char *, const char *);
+int x = 123;
+
+int main ()
+{
+  const char *const s1 = "hello world";
+  const char *const s2 = "";
+  char dst[64], *d2;
+  
+  strcpy (dst, s1);
+  if (strncat (dst, "", 100) != dst || strcmp (dst, s1))
+    abort();
+  strcpy (dst, s1);
+  if (strncat (dst, s2, 100) != dst || strcmp (dst, s1))
+    abort();
+  strcpy (dst, s1); d2 = dst;
+  if (strncat (++d2, s2, 100) != dst+1 || d2 != dst+1 || strcmp (dst, s1))
+    abort();
+  strcpy (dst, s1); d2 = dst;
+  if (strncat (++d2+5, s2, 100) != dst+6 || d2 != dst+1 || strcmp (dst, s1))
+    abort();
+  strcpy (dst, s1); d2 = dst;
+  if (strncat (++d2+5, s1+11, 100) != dst+6 || d2 != dst+1 || strcmp (dst, s1))
+    abort();
+  strcpy (dst, s1); d2 = dst;
+  if (strncat (++d2+5, s1, 0) != dst+6 || d2 != dst+1 || strcmp (dst, s1))
+    abort();
+  strcpy (dst, s1); d2 = dst;
+  if (strncat (++d2+5, "", ++x) != dst+6 || d2 != dst+1 || x != 124
+      || strcmp (dst, s1))
+    abort();
+
+  strcpy (dst, s1);
+  if (strncat (dst, "foo", 3) != dst || strcmp (dst, "hello worldfoo"))
+    abort();
+  strcpy (dst, s1);
+  if (strncat (dst, "foo", 100) != dst || strcmp (dst, "hello worldfoo"))
+    abort();
+  strcpy (dst, s1);
+  if (strncat (dst, s1, 100) != dst || strcmp (dst, "hello worldhello world"))
+    abort();
+  strcpy (dst, s1); d2 = dst;
+  if (strncat (++d2, s1, 100) != dst+1 || d2 != dst+1
+      || strcmp (dst, "hello worldhello world"))
+    abort();
+  strcpy (dst, s1); d2 = dst;
+  if (strncat (++d2+5, s1, 100) != dst+6 || d2 != dst+1
+      || strcmp (dst, "hello worldhello world"))
+    abort();
+  strcpy (dst, s1); d2 = dst;
+  if (strncat (++d2+5, s1+5, 100) != dst+6 || d2 != dst+1
+      || strcmp (dst, "hello world world"))
+    abort();
+
+  return 0;
+}
+
+#ifdef __OPTIMIZE__
+/* When optimizing, all the above cases should be transformed into
+   something else.  So any remaining calls to the original function
+   should abort.  */
+static char *
+strncat (char *s1, const char *s2, size_t n)
+{
+  abort();
+}
+#endif