diff --git a/polly/include/polly/CodeGen/BlockGenerators.h b/polly/include/polly/CodeGen/BlockGenerators.h
index 6ccf801772aa..77522ab0e84d 100644
--- a/polly/include/polly/CodeGen/BlockGenerators.h
+++ b/polly/include/polly/CodeGen/BlockGenerators.h
@@ -72,13 +72,12 @@ public:
   /// @param Builder     The LLVM-IR Builder used to generate the statement. The
   ///                    code is generated at the location, the Builder points
   ///                    to.
-  /// @param P           A reference to the pass this function is called from.
-  ///                    The pass is needed to update other analysis.
   /// @param LI          The loop info for the current function
   /// @param SE          The scalar evolution info for the current function
+  /// @param DT          The dominator tree of this function.
   /// @param ExprBuilder An expression builder to generate new access functions.
-  BlockGenerator(PollyIRBuilder &Builder, Pass *P, LoopInfo &LI,
-                 ScalarEvolution &SE, IslExprBuilder *ExprBuilder = nullptr);
+  BlockGenerator(PollyIRBuilder &Builder, LoopInfo &LI, ScalarEvolution &SE,
+                 DominatorTree &DT, IslExprBuilder *ExprBuilder = nullptr);
 
   /// @brief Copy the basic block.
   ///
@@ -94,11 +93,13 @@ public:
 
 protected:
   PollyIRBuilder &Builder;
-  Pass *P;
   LoopInfo &LI;
   ScalarEvolution &SE;
   IslExprBuilder *ExprBuilder;
 
+  /// @brief The dominator tree of this function.
+  DominatorTree &DT;
+
   /// @brief Get the new version of a value.
   ///
   /// Given an old value, we first check if a new version of this value is
diff --git a/polly/lib/CodeGen/BlockGenerators.cpp b/polly/lib/CodeGen/BlockGenerators.cpp
index a0025698335d..8b6abf1a8c51 100644
--- a/polly/lib/CodeGen/BlockGenerators.cpp
+++ b/polly/lib/CodeGen/BlockGenerators.cpp
@@ -76,9 +76,10 @@ bool polly::isIgnoredIntrinsic(const Value *V) {
   return false;
 }
 
-BlockGenerator::BlockGenerator(PollyIRBuilder &B, Pass *P, LoopInfo &LI,
-                               ScalarEvolution &SE, IslExprBuilder *ExprBuilder)
-    : Builder(B), P(P), LI(LI), SE(SE), ExprBuilder(ExprBuilder) {}
+BlockGenerator::BlockGenerator(PollyIRBuilder &B, LoopInfo &LI,
+                               ScalarEvolution &SE, DominatorTree &DT,
+                               IslExprBuilder *ExprBuilder)
+    : Builder(B), LI(LI), SE(SE), ExprBuilder(ExprBuilder), DT(DT) {}
 
 Value *BlockGenerator::getNewValue(ScopStmt &Stmt, const Value *Old,
                                    ValueMapT &BBMap, ValueMapT &GlobalMap,
@@ -285,12 +286,9 @@ void BlockGenerator::copyInstruction(ScopStmt &Stmt, const Instruction *Inst,
 
 void BlockGenerator::copyBB(ScopStmt &Stmt, ValueMapT &GlobalMap,
                             LoopToScevMapT &LTS) {
-  auto *DTWP = P->getAnalysisIfAvailable<DominatorTreeWrapperPass>();
-  auto *DT = DTWP ? &DTWP->getDomTree() : nullptr;
-
   BasicBlock *BB = Stmt.getBasicBlock();
   BasicBlock *CopyBB =
-      SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), DT, &LI);
+      SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), &DT, &LI);
   CopyBB->setName("polly.stmt." + BB->getName());
   Builder.SetInsertPoint(CopyBB->begin());
 
@@ -623,12 +621,9 @@ void VectorBlockGenerator::copyInstruction(ScopStmt &Stmt,
 }
 
 void VectorBlockGenerator::copyBB(ScopStmt &Stmt) {
-  auto *DTWP = P->getAnalysisIfAvailable<DominatorTreeWrapperPass>();
-  auto *DT = DTWP ? &DTWP->getDomTree() : nullptr;
-
   BasicBlock *BB = Stmt.getBasicBlock();
   BasicBlock *CopyBB =
-      SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), DT, &LI);
+      SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), &DT, &LI);
   CopyBB->setName("polly.stmt." + BB->getName());
   Builder.SetInsertPoint(CopyBB->begin());
 
diff --git a/polly/lib/CodeGen/IslCodeGeneration.cpp b/polly/lib/CodeGen/IslCodeGeneration.cpp
index e2f81dbf3444..007a4fce2afb 100644
--- a/polly/lib/CodeGen/IslCodeGeneration.cpp
+++ b/polly/lib/CodeGen/IslCodeGeneration.cpp
@@ -65,7 +65,7 @@ public:
       : S(S), Builder(Builder), Annotator(Annotator),
         Rewriter(new SCEVExpander(SE, "polly")),
         ExprBuilder(Builder, IDToValue, *Rewriter),
-        BlockGen(Builder, P, LI, SE, &ExprBuilder), P(P), DL(DL), LI(LI),
+        BlockGen(Builder, LI, SE, DT, &ExprBuilder), P(P), DL(DL), LI(LI),
         SE(SE), DT(DT) {}
 
   ~IslNodeBuilder() { delete Rewriter; }