adjust to change in getSubtarget() api

llvm-svn: 22687
diff --git a/llvm/lib/Target/X86/X86ISelPattern.cpp b/llvm/lib/Target/X86/X86ISelPattern.cpp
index 47e8179..dd9918e 100644
--- a/llvm/lib/Target/X86/X86ISelPattern.cpp
+++ b/llvm/lib/Target/X86/X86ISelPattern.cpp
@@ -1092,7 +1092,7 @@
     const X86Subtarget *Subtarget;
   public:
     ISel(TargetMachine &TM) : SelectionDAGISel(X86Lowering), X86Lowering(TM) {
-      Subtarget = TM.getSubtarget<const X86Subtarget>();
+      Subtarget = &TM.getSubtarget<X86Subtarget>();
     }
 
     virtual const char *getPassName() const {