[llvm] [NewPM] Remove CFGOnlyPrinterLegacyPass (PR #73412)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 updated https://github.com/llvm/llvm-project/pull/73412

>From 296b1ae27d4de6fd554891e77757ea87b3c2d247 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <agrossman154 at yahoo.com>
Date: Sat, 25 Nov 2023 14:41:10 -0800
Subject: [PATCH] [NewPM] Remove CFGOnlyPrinterLegacyPass

This pass has no test coverage upstream, is not used anywhere upstream,
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..b814393fe2ee4af 100644
--- a/llvm/include/llvm/Analysis/CFGPrinter.h
+++ b/llvm/include/llvm/Analysis/CFGPrinter.h
@@ -345,7 +345,6 @@ struct DOTGraphTraits<DOTFuncInfo *> : public DefaultDOTGraphTraits {
 namespace llvm {
 class FunctionPass;
 FunctionPass *createCFGPrinterLegacyPassPass();
-FunctionPass *createCFGOnlyPrinterLegacyPassPass();
 } // End llvm namespace
 
 #endif
diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
index 1186b0e023bbffa..83eadb3882746d2 100644
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -65,7 +65,6 @@ void initializeBranchRelaxationPass(PassRegistry&);
 void initializeBreakCriticalEdgesPass(PassRegistry&);
 void initializeBreakFalseDepsPass(PassRegistry&);
 void initializeCanonicalizeFreezeInLoopsPass(PassRegistry &);
-void initializeCFGOnlyPrinterLegacyPassPass(PassRegistry&);
 void initializeCFGPrinterLegacyPassPass(PassRegistry&);
 void initializeCFGSimplifyPassPass(PassRegistry&);
 void initializeCFGuardPass(PassRegistry&);
diff --git a/llvm/lib/Analysis/Analysis.cpp b/llvm/lib/Analysis/Analysis.cpp
index 5d80e3228401bc5..47d8e2e1d2522d0 100644
--- a/llvm/lib/Analysis/Analysis.cpp
+++ b/llvm/lib/Analysis/Analysis.cpp
@@ -25,7 +25,6 @@ void llvm::initializeAnalysis(PassRegistry &Registry) {
   initializeCallGraphDOTPrinterPass(Registry);
   initializeCallGraphViewerPass(Registry);
   initializeCFGPrinterLegacyPassPass(Registry);
-  initializeCFGOnlyPrinterLegacyPassPass(Registry);
   initializeCycleInfoWrapperPassPass(Registry);
   initializeDependenceAnalysisWrapperPassPass(Registry);
   initializeDominanceFrontierWrapperPassPass(Registry);
diff --git a/llvm/lib/Analysis/CFGPrinter.cpp b/llvm/lib/Analysis/CFGPrinter.cpp
index 78e0144632475ff..d9bf03992b9aa64 100644
--- a/llvm/lib/Analysis/CFGPrinter.cpp
+++ b/llvm/lib/Analysis/CFGPrinter.cpp
@@ -152,37 +152,6 @@ PreservedAnalyses CFGPrinterPass::run(Function &F,
   return PreservedAnalyses::all();
 }
 
-namespace {
-struct CFGOnlyPrinterLegacyPass : public FunctionPass {
-  static char ID; // Pass identification, replacement for typeid
-  CFGOnlyPrinterLegacyPass() : FunctionPass(ID) {
-    initializeCFGOnlyPrinterLegacyPassPass(*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), /*CFGOnly=*/true);
-    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 CFGOnlyPrinterLegacyPass::ID = 0;
-INITIALIZE_PASS(CFGOnlyPrinterLegacyPass, "dot-cfg-only",
-                "Print CFG of function to 'dot' file (with no function bodies)",
-                false, true)
-
 PreservedAnalyses CFGOnlyPrinterPass::run(Function &F,
                                           FunctionAnalysisManager &AM) {
   if (!CFGFuncName.empty() && !F.getName().contains(CFGFuncName))
@@ -224,10 +193,6 @@ FunctionPass *llvm::createCFGPrinterLegacyPassPass() {
   return new CFGPrinterLegacyPass();
 }
 
-FunctionPass *llvm::createCFGOnlyPrinterLegacyPassPass() {
-  return new CFGOnlyPrinterLegacyPass();
-}
-
 /// Find all blocks on the paths which terminate with a deoptimize or 
 /// unreachable (i.e. all blocks which are post-dominated by a deoptimize 
 /// or unreachable). These paths are hidden if the corresponding cl::opts