Rename ConstantSDNode's getSignExtended to getSExtValue, for
consistancy with ConstantInt, and re-implement it in terms
of ConstantInt's getSExtValue.

llvm-svn: 56700
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index d8d5db9..1ef644d 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -5019,7 +5019,7 @@
     bool IllegalFPCMov = false;
     if (VT.isFloatingPoint() && !VT.isVector() &&
         !isScalarFPTypeInSSEReg(VT))  // FPStack?
-      IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSignExtended());
+      IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
     
     if ((Opc == X86ISD::CMP ||
          Opc == X86ISD::COMI ||