GlobalISel: support swiftself attribute

llvm-svn: 367683
diff --git a/llvm/lib/Target/X86/X86CallLowering.cpp b/llvm/lib/Target/X86/X86CallLowering.cpp
index e97a28a..e4079d6 100644
--- a/llvm/lib/Target/X86/X86CallLowering.cpp
+++ b/llvm/lib/Target/X86/X86CallLowering.cpp
@@ -301,6 +301,7 @@
       : IncomingValueHandler(MIRBuilder, MRI, AssignFn) {}
 
   void markPhysRegUsed(unsigned PhysReg) override {
+    MIRBuilder.getMRI()->addLiveIn(PhysReg);
     MIRBuilder.getMBB().addLiveIn(PhysReg);
   }
 };