aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--utils/TableGen/DAGISelMatcherOpt.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/utils/TableGen/DAGISelMatcherOpt.cpp b/utils/TableGen/DAGISelMatcherOpt.cpp
index 0e89fa0..97ddf67 100644
--- 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.