1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/lib/strncmp.c b/gcc/testsuite/gcc.c-torture/execute/builtins/lib/strncmp.c
new file mode 100644
index 000000000..7a8eb6fd2
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtins/lib/strncmp.c
@@ -0,0 +1,27 @@
+extern void abort (void);
+extern int inside_main;
+
+typedef __SIZE_TYPE__ size_t;
+
+__attribute__ ((__noinline__))
+int
+strncmp(const char *s1, const char *s2, size_t n)
+{
+  const unsigned char *u1 = (const unsigned char *)s1;
+  const unsigned char *u2 = (const unsigned char *)s2;
+  unsigned char c1, c2;
+
+#ifdef __OPTIMIZE__
+  if (inside_main)
+    abort();
+#endif
+
+  while (n > 0)
+    {
+      c1 = *u1++, c2 = *u2++;
+      if (c1 == '\0' || c1 != c2)
+	return c1 - c2;
+      n--;
+    }
+  return c1 - c2;
+}