Initial check-in of gcc 4.7.2.

Change-Id: I4a2f5a921c21741a0e18bda986d77e5f1bef0365

1 files changed, 38 insertions, 0 deletions

diff --git a/gcc-4.7/libgo/runtime/go-eface-compare.c b/gcc-4.7/libgo/runtime/go-eface-compare.c
new file mode 100644
index 000000000..d88d50569
--- /dev/null
+++ b/gcc-4.7/libgo/runtime/go-eface-compare.c
@@ -0,0 +1,38 @@
+/* go-eface-compare.c -- compare two empty values.
+
+   Copyright 2010 The Go Authors. All rights reserved.
+   Use of this source code is governed by a BSD-style
+   license that can be found in the LICENSE file.  */
+
+#include "runtime.h"
+#include "interface.h"
+
+/* Compare two interface values.  Return 0 for equal, not zero for not
+   equal (return value is like strcmp).  */
+
+int
+__go_empty_interface_compare (struct __go_empty_interface left,
+			      struct __go_empty_interface right)
+{
+  const struct __go_type_descriptor *left_descriptor;
+
+  left_descriptor = left.__type_descriptor;
+
+  if (((uintptr_t) left_descriptor & reflectFlags) != 0
+      || ((uintptr_t) right.__type_descriptor & reflectFlags) != 0)
+    runtime_panicstring ("invalid interface value");
+
+  if (left_descriptor == NULL && right.__type_descriptor == NULL)
+    return 0;
+  if (left_descriptor == NULL || right.__type_descriptor == NULL)
+    return 1;
+  if (!__go_type_descriptors_equal (left_descriptor,
+				    right.__type_descriptor))
+    return 1;
+  if (__go_is_pointer_type (left_descriptor))
+    return left.__object == right.__object ? 0 : 1;
+  if (!left_descriptor->__equalfn (left.__object, right.__object,
+				   left_descriptor->__size))
+    return 1;
+  return 0;
+}