fix a long standing wart: all the ComplexPattern's were being

passed the root of the match, even though only a few patterns
actually needed this (one in X86, several in ARM [which should
be refactored anyway], and some in CellSPU that I don't feel 
like detangling).   Instead of requiring all ComplexPatterns to
take the dead root, have targets opt into getting the root by
putting SDNPWantRoot on the ComplexPattern.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114471 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/CodeGenTarget.h

@@ -42,7 +42,9 @@ enum SDNP {
   SDNPMayStore,
   SDNPSideEffect,
   SDNPMemOperand,
-  SDNPVariadic
+  SDNPVariadic,
+  SDNPWantRoot,
+  SDNPWantParent
 };
 
 /// getValueType - Return the MVT::SimpleValueType that the specified TableGen