Index: lib/Transforms/Instrumentation/MemorySanitizer.cpp
===================================================================
--- lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -242,8 +242,8 @@
 
 // mips64 Linux
 static const MemoryMapParams Linux_MIPS64_MemoryMapParams = {
-  0x004000000000,  // AndMask
-  0,               // XorMask (not used)
+  0,               // AndMask (not used)
+  0x008000000000,  // XorMask
   0,               // ShadowBase (not used)
   0x002000000000,  // OriginBase
 };