Index: compiler-rt/trunk/test/asan/TestCases/Windows/dll_intercept_memchr.cc
===================================================================
--- compiler-rt/trunk/test/asan/TestCases/Windows/dll_intercept_memchr.cc
+++ compiler-rt/trunk/test/asan/TestCases/Windows/dll_intercept_memchr.cc
@@ -2,6 +2,12 @@
 // RUN: %clang_cl_asan -LD -O0 %s -Fe%t.dll
 // RUN: not %run %t %t.dll 2>&1 | FileCheck %s
 
+// On windows 64-bit, the memchr function is written in assembly and is not
+// hookable with the interception library. There is not enough padding before
+// the function and there is a short jump on the second instruction which
+// doesn't not allow enough space to encode a 64-bit indirect jump.
+// UNSUPPORTED: x86_64-windows
+
 #include <string.h>
 
 extern "C" __declspec(dllexport)