Accept 'y' constraint (MMX) in inline asm.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49011 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 6cbae42..275d4a0 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -6132,6 +6132,7 @@
     case 'q':
     case 'Q':
     case 'x':
+    case 'y':
     case 'Y':
       return C_RegisterClass;
     default: