Add the SubRegIndex TableGen class.

This is the beginning of purely symbolic subregister indices, but we need a bit
of jiggling before the explicit numeric indices can be completely removed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104492 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index a0bccfc5e5..878ed09550 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -1057,6 +1057,11 @@ static EEVT::TypeSet getImplicitType(Record *R, unsigned ResNo,
     const CodeGenTarget &T = TP.getDAGPatterns().getTargetInfo();
     return EEVT::TypeSet(T.getRegisterVTs(R));
   }
+
+  if (R->isSubClassOf("SubRegIndex")) {
+    assert(ResNo == 0 && "SubRegisterIndices only produce one result!");
+    return EEVT::TypeSet();
+  }
   
   if (R->isSubClassOf("ValueType") || R->isSubClassOf("CondCode")) {
     assert(ResNo == 0 && "This node only has one result!");