Use getArch instead of getArchName + string compare.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165370 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/WindowsToolChain.cpp b/lib/Driver/WindowsToolChain.cpp
index 080e0d6..ac65187 100644
--- a/lib/Driver/WindowsToolChain.cpp
+++ b/lib/Driver/WindowsToolChain.cpp
@@ -89,7 +89,7 @@
 }
 
 const char *Windows::GetForcedPicModel() const {
-  if (getArchName() == "x86_64")
+  if (getArch() == llvm::Triple::x86_64)
     return "pic";
   return 0;
 }