tolerate factoring the *last* node for CellSPU.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97508 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/utils/TableGen/DAGISelMatcherOpt.cpp b/utils/TableGen/DAGISelMatcherOpt.cpp
index 0e89fa028f595c245ad8116e08e03fc8585590c8..97ddf67dd40b42963edbd6782b34877b2e6e97f6 100644 (file)
--- a/utils/TableGen/DAGISelMatcherOpt.cpp
+++ b/utils/TableGen/DAGISelMatcherOpt.cpp
@@ -351,6 +351,11 @@ static void FactorNodes(OwningPtr<Matcher> &MatcherPtr) {
     return;
   }
   
+  if (NewOptionsToMatch.empty()) {
+    MatcherPtr.reset(0);
+    return;
+  }
+  
   // If our factoring failed (didn't achieve anything) see if we can simplify in
   // other ways.