FastISel doesn't yet handle callee-pop functions.

To support this, move IsCalleePop from X86ISelLowering to X86Subtarget.

llvm-svn: 104866
diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index 1bc5eb7..33a1919 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -1314,6 +1314,10 @@
   if (FTy->isVarArg())
     return false;
 
+  // Fast-isel doesn't know about callee-pop yet.
+  if (Subtarget->IsCalleePop(FTy->isVarArg(), CC))
+    return false;
+
   // Handle *simple* calls for now.
   const Type *RetTy = CS.getType();
   EVT RetVT;