Add support for the VSX target attribute. No functional change
as we don't actually use it to emit any code yet.

llvm-svn: 192837
diff --git a/llvm/lib/Target/PowerPC/PPCSubtarget.h b/llvm/lib/Target/PowerPC/PPCSubtarget.h
index a9fa98f..c863a6e 100644
--- a/llvm/lib/Target/PowerPC/PPCSubtarget.h
+++ b/llvm/lib/Target/PowerPC/PPCSubtarget.h
@@ -76,6 +76,7 @@
   bool IsPPC64;
   bool HasAltivec;
   bool HasQPX;
+  bool HasVSX;
   bool HasFCPSGN;
   bool HasFSQRT;
   bool HasFRE, HasFRES, HasFRSQRTE, HasFRSQRTES;