diff --git a/llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
--- a/llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
@@ -66,7 +66,6 @@
 #include "llvm/ADT/None.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/ADT/iterator.h"
@@ -110,7 +109,6 @@
 #include <cassert>
 #include <cstddef>
 #include <cstdint>
-#include <iterator>
 #include <memory>
 #include <set>
 #include <string>
diff --git a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
--- a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
@@ -51,7 +51,6 @@
 #include "llvm/Transforms/Utils/SSAUpdater.h"
 #include <algorithm>
 #include <cassert>
-#include <cstddef>
 #include <cstdint>
 #include <string>
 
diff --git a/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp b/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
--- a/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
+++ b/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
@@ -67,6 +67,7 @@
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Analysis/OptimizationRemarkEmitter.h"
 #include "llvm/Analysis/ProfileSummaryInfo.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/IR/Attributes.h"
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/CFG.h"
diff --git a/llvm/lib/Transforms/Instrumentation/ValueProfileCollector.h b/llvm/lib/Transforms/Instrumentation/ValueProfileCollector.h
--- a/llvm/lib/Transforms/Instrumentation/ValueProfileCollector.h
+++ b/llvm/lib/Transforms/Instrumentation/ValueProfileCollector.h
@@ -16,7 +16,6 @@
 #ifndef LLVM_ANALYSIS_PROFILE_GEN_ANALYSIS_H
 #define LLVM_ANALYSIS_PROFILE_GEN_ANALYSIS_H
 
-#include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/ProfileData/InstrProf.h"
 #include <memory>
 #include <vector>
@@ -25,6 +24,7 @@
 
 class Function;
 class Instruction;
+class TargetLibraryInfo;
 class Value;
 
 /// Utility analysis that determines what values are worth profiling.
diff --git a/llvm/lib/Transforms/Instrumentation/ValueProfilePlugins.inc b/llvm/lib/Transforms/Instrumentation/ValueProfilePlugins.inc
--- a/llvm/lib/Transforms/Instrumentation/ValueProfilePlugins.inc
+++ b/llvm/lib/Transforms/Instrumentation/ValueProfilePlugins.inc
@@ -15,6 +15,7 @@
 
 #include "ValueProfileCollector.h"
 #include "llvm/Analysis/IndirectCallVisitor.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/IR/InstVisitor.h"
 
 using namespace llvm;
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h b/llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h
--- a/llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h
@@ -25,6 +25,7 @@
 #define LLVM_TRANSFORMS_VECTORIZE_LOOPVECTORIZATIONPLANNER_H
 
 #include "VPlan.h"
+#include "llvm/Support/InstructionCost.h"
 
 namespace llvm {
 
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -146,6 +146,7 @@
 #include <functional>
 #include <iterator>
 #include <limits>
+#include <map>
 #include <memory>
 #include <string>
 #include <tuple>
diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -71,7 +71,9 @@
 #include "llvm/IR/User.h"
 #include "llvm/IR/Value.h"
 #include "llvm/IR/ValueHandle.h"
+#ifdef EXPENSIVE_CHECKS
 #include "llvm/IR/Verifier.h"
+#endif
 #include "llvm/Pass.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -33,7 +33,6 @@
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallBitVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/ADT/ilist.h"
@@ -41,11 +40,9 @@
 #include "llvm/Analysis/VectorUtils.h"
 #include "llvm/IR/DebugLoc.h"
 #include "llvm/IR/FMF.h"
-#include "llvm/Support/InstructionCost.h"
 #include <algorithm>
 #include <cassert>
 #include <cstddef>
-#include <map>
 #include <string>
 
 namespace llvm {
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.cpp b/llvm/lib/Transforms/Vectorize/VPlan.cpp
--- a/llvm/lib/Transforms/Vectorize/VPlan.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlan.cpp
@@ -28,7 +28,6 @@
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/CFG.h"
 #include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/InstrTypes.h"
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/Type.h"
@@ -43,7 +42,6 @@
 #include "llvm/Transforms/Utils/BasicBlockUtils.h"
 #include "llvm/Transforms/Utils/ScalarEvolutionExpander.h"
 #include <cassert>
-#include <iterator>
 #include <string>
 #include <vector>
 
diff --git a/llvm/lib/Transforms/Vectorize/VPlanHCFGBuilder.h b/llvm/lib/Transforms/Vectorize/VPlanHCFGBuilder.h
--- a/llvm/lib/Transforms/Vectorize/VPlanHCFGBuilder.h
+++ b/llvm/lib/Transforms/Vectorize/VPlanHCFGBuilder.h
@@ -24,13 +24,15 @@
 #ifndef LLVM_TRANSFORMS_VECTORIZE_VPLAN_VPLANHCFGBUILDER_H
 #define LLVM_TRANSFORMS_VECTORIZE_VPLAN_VPLANHCFGBUILDER_H
 
-#include "VPlan.h"
 #include "VPlanDominatorTree.h"
 #include "VPlanVerifier.h"
 
 namespace llvm {
 
 class Loop;
+class LoopInfo;
+class VPRegionBlock;
+class VPlan;
 class VPlanTestBase;
 
 /// Main class to build the VPlan H-CFG for an incoming IR.
diff --git a/llvm/lib/Transforms/Vectorize/VPlanPredicator.h b/llvm/lib/Transforms/Vectorize/VPlanPredicator.h
--- a/llvm/lib/Transforms/Vectorize/VPlanPredicator.h
+++ b/llvm/lib/Transforms/Vectorize/VPlanPredicator.h
@@ -16,10 +16,16 @@
 #define LLVM_TRANSFORMS_VECTORIZE_VPLAN_PREDICATOR_H
 
 #include "LoopVectorizationPlanner.h"
-#include "VPlan.h"
 #include "VPlanDominatorTree.h"
+#include "VPlanLoopInfo.h"
+#include <list>
 
 namespace llvm {
+class VPBasicBlock;
+class VPBlockBase;
+class VPRegionBlock;
+class VPValue;
+class VPlan;
 
 class VPlanPredicator {
 private:
diff --git a/llvm/lib/Transforms/Vectorize/VPlanPredicator.cpp b/llvm/lib/Transforms/Vectorize/VPlanPredicator.cpp
--- a/llvm/lib/Transforms/Vectorize/VPlanPredicator.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanPredicator.cpp
@@ -14,8 +14,6 @@
 
 #include "VPlanPredicator.h"
 #include "VPlan.h"
-#include "llvm/ADT/DepthFirstIterator.h"
-#include "llvm/ADT/GraphTraits.h"
 #include "llvm/ADT/PostOrderIterator.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
diff --git a/llvm/lib/Transforms/Vectorize/VPlanSLP.cpp b/llvm/lib/Transforms/Vectorize/VPlanSLP.cpp
--- a/llvm/lib/Transforms/Vectorize/VPlanSLP.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanSLP.cpp
@@ -15,16 +15,10 @@
 //===----------------------------------------------------------------------===//
 
 #include "VPlan.h"
-#include "llvm/ADT/DepthFirstIterator.h"
-#include "llvm/ADT/PostOrderIterator.h"
+#include "VPlanValue.h"
+#include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/Twine.h"
-#include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Analysis/VectorUtils.h"
-#include "llvm/IR/BasicBlock.h"
-#include "llvm/IR/CFG.h"
-#include "llvm/IR/Dominators.h"
-#include "llvm/IR/InstrTypes.h"
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/Type.h"
@@ -32,12 +26,9 @@
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/GraphWriter.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/Transforms/Utils/BasicBlockUtils.h"
 #include <algorithm>
 #include <cassert>
-#include <iterator>
 #include <utility>
 
 using namespace llvm;
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.h b/llvm/lib/Transforms/Vectorize/VPlanTransforms.h
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.h
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.h
@@ -14,8 +14,7 @@
 #define LLVM_TRANSFORMS_VECTORIZE_VPLANTRANSFORMS_H
 
 #include "VPlan.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/Transforms/Vectorize/LoopVectorizationLegality.h"
+#include "llvm/ADT/STLFunctionalExtras.h"
 
 namespace llvm {
 
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -14,6 +14,7 @@
 #include "VPlanTransforms.h"
 #include "llvm/ADT/PostOrderIterator.h"
 #include "llvm/ADT/SetVector.h"
+#include "llvm/Analysis/IVDescriptors.h"
 
 using namespace llvm;