Add missing x64 sequences that load objects from THR.

runtime/vm/instructions_x64.cc

Index: runtime/vm/instructions_x64.cc
diff --git a/runtime/vm/instructions_x64.cc b/runtime/vm/instructions_x64.cc
index 2dc98bc55d8bc29a9738692c552972a9d5094741..3fa610aa9b04015ecd6b772f38fbffe5b7998b04 100644
--- a/runtime/vm/instructions_x64.cc
+++ b/runtime/vm/instructions_x64.cc
@@ -48,7 +48,11 @@ bool DecodeLoadObjectFromPoolOrThread(uword pc,
     int32_t offset = *reinterpret_cast<int32_t*>(pc + 3);
     return Thread::ObjectAtOffset(offset, obj);
   }
-  if (((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0x5e)) ||
+  if (((bytes[0] == 0x41) && (bytes[1] == 0xff) && (bytes[2] == 0x76)) ||
+      ((bytes[0] == 0x49) && (bytes[1] == 0x3b) && (bytes[2] == 0x66)) ||
+      ((bytes[0] == 0x49) && (bytes[1] == 0x8b) && (bytes[2] == 0x46)) ||
+      ((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0x5e)) ||
+      ((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0x66)) ||
       ((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0x6e))) {
     uint8_t offset = *reinterpret_cast<uint8_t*>(pc + 3);
     return Thread::ObjectAtOffset(offset, obj);