Added check for "-filter-print-funcs" option to the region IR dumps.

[mehdi_amini]

LG with 2 minor comments

llvm/lib/Analysis/RegionPass.cpp

17–18

Please fix the clang-format warning

198

Nit, early exit is preferred.

llvm/lib/Analysis/RegionPass.cpp

 //===- RegionPass.cpp - Region Pass and Region Pass Manager ---------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements RegionPass and RGPassManager. All region optimization
 // and transformation passes are derived from RegionPass. RGPassManager is
 // responsible for managing RegionPasses.
 // Most of this code has been COPIED from LoopPass.cpp
 //
 //===----------------------------------------------------------------------===//
 #include "llvm/Analysis/RegionPass.h"
 #include "llvm/IR/OptBisect.h"
 #include "llvm/IR/PassTimingInfo.h"
+#include "llvm/IR/PrintPasses.h"
 #include "llvm/IR/StructuralHash.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Timer.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
 #define DEBUG_TYPE "regionpassmgr"
 
public:
   PrintRegionPass(const std::string &B, raw_ostream &o)
       : RegionPass(ID), Banner(B), Out(o) {}
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.setPreservesAll();
   }
 
   bool runOnRegion(Region *R, RGPassManager &RGM) override {
+    if (!isFunctionInPrintList(R->getEntry()->getParent()->getName()))
+      return false;
     Out << Banner;
     for (const auto *BB : R->blocks()) {
       if (BB)
         BB->print(Out);
       else
         Out << "Printing <null> Block";
     }
 
     return false;
   }
 
   StringRef getPassName() const override { return "Print Region IR"; }
 };