1 files changed, 7 insertions, 1 deletions
diff --git a/polly/lib/CodeGen/IslAst.cpp b/polly/lib/CodeGen/IslAst.cpp
index 3c67cc7ed10..346e14f496b 100644
--- a/polly/lib/CodeGen/IslAst.cpp
+++ b/polly/lib/CodeGen/IslAst.cpp
@@ -806,6 +806,12 @@ bool IslAstInfoWrapperPass::runOnScop(Scop &Scop) {
   const Dependences &D =
       getAnalysis<DependenceInfo>().getDependences(Dependences::AL_Statement);
 
+  if (D.getSharedIslCtx() != Scop.getSharedIslCtx()) {
+    DEBUG(dbgs() << "Got dependence analysis for different SCoP/isl_ctx\n");
+    Ast.reset();
+    return false;
+  }
+
   Ast.reset(new IslAstInfo(Scop, D));
 
   DEBUG(printScop(dbgs(), Scop));
@@ -815,7 +821,7 @@ bool IslAstInfoWrapperPass::runOnScop(Scop &Scop) {
 void IslAstInfoWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
   // Get the Common analysis usage of ScopPasses.
   ScopPass::getAnalysisUsage(AU);
-  AU.addRequired<ScopInfoRegionPass>();
+  AU.addRequiredTransitive<ScopInfoRegionPass>();
   AU.addRequired<DependenceInfo>();
 
   AU.addPreserved<DependenceInfo>();