Index: lib/CodeGen/PPCGCodeGeneration.cpp
===================================================================
--- lib/CodeGen/PPCGCodeGeneration.cpp
+++ lib/CodeGen/PPCGCodeGeneration.cpp
@@ -2132,7 +2132,8 @@
     PPCGScop->tagged_must_kills = isl_union_map_empty(S->getParamSpace());
     PPCGScop->tagger = nullptr;
 
-    PPCGScop->independence = nullptr;
+    PPCGScop->independence =
+        isl_union_map_empty(isl_set_get_space(PPCGScop->context));
     PPCGScop->dep_flow = nullptr;
     PPCGScop->tagged_dep_flow = nullptr;
     PPCGScop->dep_false = nullptr;