Add proper headers in CFGUpdate.h and add CFGDiff.h in the list of delayed headers for LLVM_intrinsic_gen.

[asbirlea]

Summary

Fix module build after r339694.
Add headers needed in CFGUpdate.h.
Add CFGDiff.h in the list of delayed headers for LLVM_intrinsic_gen.
Up for post-commit review.

[aprantl]

That looks good!

include/llvm/Support/CFGUpdate.h

 // This file defines a CFG Edge Update: Insert or Delete, and two Nodes as the
 // Edge ends.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_SUPPORT_CFGUPDATE_H
 #define LLVM_SUPPORT_CFGUPDATE_H
 
+#include "llvm/ADT/APInt.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/PointerIntPair.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
 
 namespace llvm {
 namespace cfg {
 enum class UpdateKind : unsigned char { Insert, Delete };
 
 template <typename NodePtr> class Update {
   using NodeKindPair = PointerIntPair<NodePtr, 1, UpdateKind>;
   NodePtr From;

include/llvm/module.modulemap

module LLVM_intrinsic_gen {
   module IR_ModuleSummaryIndexYAML { header "IR/ModuleSummaryIndexYAML.h" export * }
   module IR_Function { header "IR/Function.h" export * }
   module IR_InstrTypes { header "IR/InstrTypes.h" export * }
   module IR_Instructions { header "IR/Instructions.h" export * }
 
 
   // Intrinsics.h
   module IR_CFG { header "IR/CFG.h" export * }
+  module IR_CFGDiff { header "IR/CFGDiff.h" export * }
   module IR_ConstantRange { header "IR/ConstantRange.h" export * }
   module IR_Dominators { header "IR/Dominators.h" export * }
   module Analysis_PostDominators { header "Analysis/PostDominators.h" export * }
   module IR_DomTreeUpdater { header "IR/DomTreeUpdater.h" export * }
   module IR_IRBuilder { header "IR/IRBuilder.h" export * }
   module IR_PassManager { header "IR/PassManager.h" export * }
   module IR_PredIteratorCache { header "IR/PredIteratorCache.h" export * }
   module IR_Verifier { header "IR/Verifier.h" export * }