[NFC] Rename BBSectionsPrepare -> BasicBlockSections.

Rename the BBSectionsPrepare pass as suggested by the review comment in
https://reviews.llvm.org/D85368.

Differential Revision: https://reviews.llvm.org/D85380

Author: Snehasish Kumar

llvm/include/llvm/CodeGen/Passes.h

@@ -44,11 +44,11 @@ namespace llvm {
   /// the entry block.
   FunctionPass *createUnreachableBlockEliminationPass();
 
-  /// createBBSectionsPrepare Pass - This pass assigns sections to machine basic
-  /// blocks and is enabled with -fbasic-block-sections.
-  /// Buf is a memory buffer that contains the list of functions and basic
-  /// block ids to selectively enable basic block sections.
-  MachineFunctionPass *createBBSectionsPreparePass(const MemoryBuffer *Buf);
+  /// createBasicBlockSections Pass - This pass assigns sections to machine
+  /// basic blocks and is enabled with -fbasic-block-sections. Buf is a memory
+  /// buffer that contains the list of functions and basic block ids to
+  /// selectively enable basic block sections.
+  MachineFunctionPass *createBasicBlockSectionsPass(const MemoryBuffer *Buf);
 
   /// MachineFunctionPrinter pass - This pass prints out the machine function to
   /// the given stream as a debugging tool.

llvm/include/llvm/InitializePasses.h

@@ -79,7 +79,7 @@ void initializeAssumptionCacheTrackerPass(PassRegistry&);
 void initializeAtomicExpandPass(PassRegistry&);
 void initializeAttributorLegacyPassPass(PassRegistry&);
 void initializeAttributorCGSCCLegacyPassPass(PassRegistry &);
-void initializeBBSectionsPreparePass(PassRegistry &);
+void initializeBasicBlockSectionsPass(PassRegistry &);
 void initializeBDCELegacyPassPass(PassRegistry&);
 void initializeBarrierNoopPass(PassRegistry&);
 void initializeBasicAAWrapperPassPass(PassRegistry&);

llvm/lib/CodeGen/BBSectionsPrepare.cpp renamed to llvm/lib/CodeGen/BasicBlockSections.cpp

@@ -1,12 +1,12 @@
-//===-- BBSectionsPrepare.cpp ---=========---------------------------------===//
+//===-- BasicBlockSections.cpp ---=========--------------------------------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 //
-// BBSectionsPrepare implementation.
+// BasicBlockSections implementation.
 //
 // The purpose of this pass is to assign sections to basic blocks when
 // -fbasic-block-sections= option is used. Further, with profile information
@@ -100,7 +100,7 @@ struct BBClusterInfo {
 
 using ProgramBBClusterInfoMapTy = StringMap<SmallVector<BBClusterInfo, 4>>;
 
-class BBSectionsPrepare : public MachineFunctionPass {
+class BasicBlockSections : public MachineFunctionPass {
 public:
   static char ID;
 
@@ -119,13 +119,13 @@ class BBSectionsPrepare : public MachineFunctionPass {
   // name for which we have mapping in ProgramBBClusterInfo.
   StringMap<StringRef> FuncAliasMap;
 
-  BBSectionsPrepare(const MemoryBuffer *Buf)
+  BasicBlockSections(const MemoryBuffer *Buf)
       : MachineFunctionPass(ID), MBuf(Buf) {
-    initializeBBSectionsPreparePass(*PassRegistry::getPassRegistry());
+    initializeBasicBlockSectionsPass(*PassRegistry::getPassRegistry());
   };
 
-  BBSectionsPrepare() : MachineFunctionPass(ID) {
-    initializeBBSectionsPreparePass(*PassRegistry::getPassRegistry());
+  BasicBlockSections() : MachineFunctionPass(ID) {
+    initializeBasicBlockSectionsPass(*PassRegistry::getPassRegistry());
   }
 
   StringRef getPassName() const override {
@@ -144,8 +144,8 @@ class BBSectionsPrepare : public MachineFunctionPass {
 
 } // end anonymous namespace
 
-char BBSectionsPrepare::ID = 0;
-INITIALIZE_PASS(BBSectionsPrepare, "bbsections-prepare",
+char BasicBlockSections::ID = 0;
+INITIALIZE_PASS(BasicBlockSections, "bbsections-prepare",
                 "Prepares for basic block sections, by splitting functions "
                 "into clusters of basic blocks.",
                 false, false)
@@ -324,7 +324,7 @@ static bool assignSectionsAndSortBasicBlocks(
   return true;
 }
 
-bool BBSectionsPrepare::runOnMachineFunction(MachineFunction &MF) {
+bool BasicBlockSections::runOnMachineFunction(MachineFunction &MF) {
   auto BBSectionsType = MF.getTarget().getBBSectionsType();
   assert(BBSectionsType != BasicBlockSection::None &&
          "BB Sections not enabled!");
@@ -438,20 +438,20 @@ static Error getBBClusterInfo(const MemoryBuffer *MBuf,
   return Error::success();
 }
 
-bool BBSectionsPrepare::doInitialization(Module &M) {
+bool BasicBlockSections::doInitialization(Module &M) {
   if (!MBuf)
     return false;
   if (auto Err = getBBClusterInfo(MBuf, ProgramBBClusterInfo, FuncAliasMap))
     report_fatal_error(std::move(Err));
   return false;
 }
 
-void BBSectionsPrepare::getAnalysisUsage(AnalysisUsage &AU) const {
+void BasicBlockSections::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.setPreservesAll();
   MachineFunctionPass::getAnalysisUsage(AU);
 }
 
 MachineFunctionPass *
-llvm::createBBSectionsPreparePass(const MemoryBuffer *Buf) {
-  return new BBSectionsPrepare(Buf);
+llvm::createBasicBlockSectionsPass(const MemoryBuffer *Buf) {
+  return new BasicBlockSections(Buf);
 }

llvm/lib/CodeGen/CMakeLists.txt

@@ -8,7 +8,7 @@ add_llvm_component_library(LLVMCodeGen
   BranchRelaxation.cpp
   BreakFalseDeps.cpp
   BuiltinGCs.cpp
-  BBSectionsPrepare.cpp
+  BasicBlockSections.cpp
   CalcSpillWeights.cpp
   CallingConvLower.cpp
   CFGuardLongjmp.cpp

llvm/lib/CodeGen/CodeGen.cpp

@@ -20,7 +20,7 @@ using namespace llvm;
 /// initializeCodeGen - Initialize all passes linked into the CodeGen library.
 void llvm::initializeCodeGen(PassRegistry &Registry) {
   initializeAtomicExpandPass(Registry);
-  initializeBBSectionsPreparePass(Registry);
+  initializeBasicBlockSectionsPass(Registry);
   initializeBranchFolderPassPass(Registry);
   initializeBranchRelaxationPass(Registry);
   initializeCFGuardLongjmpPass(Registry);

llvm/lib/CodeGen/TargetPassConfig.cpp

@@ -1015,7 +1015,7 @@ void TargetPassConfig::addMachinePasses() {
   }
 
   if (TM->getBBSectionsType() != llvm::BasicBlockSection::None)
-    addPass(llvm::createBBSectionsPreparePass(TM->getBBSectionsFuncListBuf()));
+    addPass(llvm::createBasicBlockSectionsPass(TM->getBBSectionsFuncListBuf()));
 
   // Add passes that directly emit MI after all other MI passes.
   addPreEmitPass2();

llvm/utils/gn/secondary/llvm/lib/CodeGen/BUILD.gn

@@ -21,7 +21,7 @@ static_library("CodeGen") {
     "AllocationOrder.cpp",
     "Analysis.cpp",
     "AtomicExpandPass.cpp",
-    "BBSectionsPrepare.cpp",
+    "BasicBlockSections.cpp",
     "BasicTargetTransformInfo.cpp",
     "BranchFolding.cpp",
     "BranchRelaxation.cpp",