[llvm] [NewPM] Remove CFGPrinterLegacyPass (PR #73414)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/73414

This pass has no test coverage in upstream LLVM, is not used anywhere in upstream LLVM, and has a NewPM equivalent. For these reasons, remove it.

>From 55e97c50e0ebfdfe753e185b8ec73e17c6732be2 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <agrossman154 at yahoo.com>
Date: Sat, 25 Nov 2023 14:46:51 -0800
Subject: [PATCH] [NewPM] Remove CFGPrinterLegacyPass

This pass has no test coverage in upstream LLVM, is not used anywhere in
upstream LLVM, and has a NewPM equivalent. For these reasons, remove it.
---
 llvm/include/llvm/Analysis/CFGPrinter.h |  1 -
 llvm/include/llvm/InitializePasses.h    |  1 -
 llvm/lib/Analysis/Analysis.cpp          |  1 -
 llvm/lib/Analysis/CFGPrinter.cpp        | 35 -------------------------
 4 files changed, 38 deletions(-)

diff --git a/llvm/include/llvm/Analysis/CFGPrinter.h b/llvm/include/llvm/Analysis/CFGPrinter.h
index 884dd857c82b180..e12bd7bc45b796f 100644
--- a/llvm/include/llvm/Analysis/CFGPrinter.h
+++ b/llvm/include/llvm/Analysis/CFGPrinter.h
@@ -344,7 +344,6 @@ struct DOTGraphTraits<DOTFuncInfo *> : public DefaultDOTGraphTraits {
 
 namespace llvm {
 class FunctionPass;
-FunctionPass *createCFGPrinterLegacyPassPass();
 FunctionPass *createCFGOnlyPrinterLegacyPassPass();
 } // End llvm namespace
 
diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
index 05122ea98d8ca52..6c79544a4f83ec1 100644
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -67,7 +67,6 @@ void initializeBreakFalseDepsPass(PassRegistry&);
 void initializeCanonicalizeFreezeInLoopsPass(PassRegistry &);
 void initializeCFGOnlyPrinterLegacyPassPass(PassRegistry&);
 void initializeCFGOnlyViewerLegacyPassPass(PassRegistry&);
-void initializeCFGPrinterLegacyPassPass(PassRegistry&);
 void initializeCFGSimplifyPassPass(PassRegistry&);
 void initializeCFGuardPass(PassRegistry&);
 void initializeCFGuardLongjmpPass(PassRegistry&);
diff --git a/llvm/lib/Analysis/Analysis.cpp b/llvm/lib/Analysis/Analysis.cpp
index 1fa14b005d37609..2876c3b8823bb17 100644
--- a/llvm/lib/Analysis/Analysis.cpp
+++ b/llvm/lib/Analysis/Analysis.cpp
@@ -26,7 +26,6 @@ void llvm::initializeAnalysis(PassRegistry &Registry) {
   initializeCallGraphPrinterLegacyPassPass(Registry);
   initializeCallGraphViewerPass(Registry);
   initializeCFGViewerLegacyPassPass(Registry);
-  initializeCFGPrinterLegacyPassPass(Registry);
   initializeCFGOnlyViewerLegacyPassPass(Registry);
   initializeCFGOnlyPrinterLegacyPassPass(Registry);
   initializeCycleInfoWrapperPassPass(Registry);
diff --git a/llvm/lib/Analysis/CFGPrinter.cpp b/llvm/lib/Analysis/CFGPrinter.cpp
index 9f55371f259b2cf..5f5ec8ab1eb136d 100644
--- a/llvm/lib/Analysis/CFGPrinter.cpp
+++ b/llvm/lib/Analysis/CFGPrinter.cpp
@@ -173,37 +173,6 @@ PreservedAnalyses CFGOnlyViewerPass::run(Function &F,
   return PreservedAnalyses::all();
 }
 
-namespace {
-struct CFGPrinterLegacyPass : public FunctionPass {
-  static char ID; // Pass identification, replacement for typeid
-  CFGPrinterLegacyPass() : FunctionPass(ID) {
-    initializeCFGPrinterLegacyPassPass(*PassRegistry::getPassRegistry());
-  }
-
-  bool runOnFunction(Function &F) override {
-    if (!CFGFuncName.empty() && !F.getName().contains(CFGFuncName))
-      return false;
-    auto *BPI = &getAnalysis<BranchProbabilityInfoWrapperPass>().getBPI();
-    auto *BFI = &getAnalysis<BlockFrequencyInfoWrapperPass>().getBFI();
-    writeCFGToDotFile(F, BFI, BPI, getMaxFreq(F, BFI));
-    return false;
-  }
-
-  void print(raw_ostream &OS, const Module * = nullptr) const override {}
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    FunctionPass::getAnalysisUsage(AU);
-    AU.addRequired<BlockFrequencyInfoWrapperPass>();
-    AU.addRequired<BranchProbabilityInfoWrapperPass>();
-    AU.setPreservesAll();
-  }
-};
-} // namespace
-
-char CFGPrinterLegacyPass::ID = 0;
-INITIALIZE_PASS(CFGPrinterLegacyPass, "dot-cfg",
-                "Print CFG of function to 'dot' file", false, true)
-
 PreservedAnalyses CFGPrinterPass::run(Function &F,
                                       FunctionAnalysisManager &AM) {
   if (!CFGFuncName.empty() && !F.getName().contains(CFGFuncName))
@@ -282,10 +251,6 @@ void Function::viewCFGOnly(const BlockFrequencyInfo *BFI,
   viewCFG(true, BFI, BPI);
 }
 
-FunctionPass *llvm::createCFGPrinterLegacyPassPass() {
-  return new CFGPrinterLegacyPass();
-}
-
 FunctionPass *llvm::createCFGOnlyPrinterLegacyPassPass() {
   return new CFGOnlyPrinterLegacyPass();
 }