1 files changed, 5 insertions, 0 deletions
diff --git a/polly/lib/Analysis/Dependences.cpp b/polly/lib/Analysis/Dependences.cpp
index 736bccaf70e..3b0980fbc37 100644
--- a/polly/lib/Analysis/Dependences.cpp
+++ b/polly/lib/Analysis/Dependences.cpp
@@ -317,6 +317,7 @@ void Dependences::releaseMemory() {
 }
 
 isl_union_map *Dependences::getDependences(int Kinds) {
+  assert(hasValidDependences() && "No valid dependences available");
   isl_space *Space = isl_union_map_get_space(RAW);
   isl_union_map *Deps = isl_union_map_empty(Space);
 
@@ -334,6 +335,10 @@ isl_union_map *Dependences::getDependences(int Kinds) {
   return Deps;
 }
 
+bool Dependences::hasValidDependences() {
+  return (RAW != NULL) && (WAR != NULL) && (WAW != NULL);
+}
+
 void Dependences::getAnalysisUsage(AnalysisUsage &AU) const {
   ScopPass::getAnalysisUsage(AU);
 }