Target/X86: Tweak win64's tailcall.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124272 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index 63dcd14..ceb1b65 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -2025,6 +2025,7 @@
   case X86::GR64_NOREX_NOSPRegClassID:
   case X86::GR64_NOSPRegClassID:
   case X86::GR64_TCRegClassID:
+  case X86::GR64_TCW64RegClassID:
     return load ? X86::MOV64rm : X86::MOV64mr;
   case X86::GR32RegClassID:
   case X86::GR32_ABCDRegClassID: