1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/lib/strstr.c b/gcc/testsuite/gcc.c-torture/execute/builtins/lib/strstr.c
new file mode 100644
index 000000000..7d3544506
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtins/lib/strstr.c
@@ -0,0 +1,29 @@
+extern void abort (void);
+extern int inside_main;
+
+__attribute__ ((__noinline__))
+char *
+strstr(const char *s1, const char *s2)
+{
+  const char *p, *q;
+
+#ifdef __OPTIMIZE__
+  if (inside_main)
+    abort ();
+#endif
+
+  /* deliberately dumb algorithm */
+  for (; *s1; s1++)
+    {
+      p = s1, q = s2;
+      while (*q && *p)
+	{
+	  if (*q != *p)
+	    break;
+	  p++, q++;
+	}
+      if (*q == 0)
+	return (char *)s1;
+    }
+  return 0;
+}