From 5a118340dd665fd2776e6a48b63e35b59a548d73 Mon Sep 17 00:00:00 2001
From: Pete Cooper <peter_cooper@apple.com>
Date: Thu, 11 Jun 2015 01:04:56 +0000
Subject: [PATCH] Remove MachineModuleInfo::UsedFunctions as it has no users.

It hasn't been used since r130964.

This also removes MachineModuleInfo::isUsedFunction and
MachineModuleInfo::AnalyzeModule, both of which were only
there to support UsedFunctions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239501 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/MachineModuleInfo.h | 16 ----------------
 lib/CodeGen/AsmPrinter/AsmPrinter.cpp    |  1 -
 lib/CodeGen/MachineModuleInfo.cpp        | 17 -----------------
 lib/Target/NVPTX/NVPTXAsmPrinter.cpp     |  1 -
 4 files changed, 35 deletions(-)

diff --git a/include/llvm/CodeGen/MachineModuleInfo.h b/include/llvm/CodeGen/MachineModuleInfo.h
index ce45c165915..ad394f0e2ff 100644
--- a/include/llvm/CodeGen/MachineModuleInfo.h
+++ b/include/llvm/CodeGen/MachineModuleInfo.h
@@ -157,11 +157,6 @@ class MachineModuleInfo : public ImmutablePass {
   /// emit common EH frames.
   std::vector<const Function *> Personalities;
 
-  /// UsedFunctions - The functions in the @llvm.used list in a more easily
-  /// searchable format.  This does not include the functions in
-  /// llvm.compiler.used.
-  SmallPtrSet<const Function *, 32> UsedFunctions;
-
   /// AddrLabelSymbols - This map keeps track of which symbol is being used for
   /// the specified basic block's address of label.
   MMIAddrLabelMap *AddrLabelSymbols;
@@ -246,10 +241,6 @@ public:
     return const_cast<MachineModuleInfo*>(this)->getObjFileInfo<Ty>();
   }
 
-  /// AnalyzeModule - Scan the module for global debug information.
-  ///
-  void AnalyzeModule(const Module &M);
-
   /// hasDebugInfo - Returns true if valid debug info is present.
   ///
   bool hasDebugInfo() const { return DbgInfoAvailable; }
@@ -339,13 +330,6 @@ public:
     return Personalities;
   }
 
-  /// isUsedFunction - Return true if the functions in the llvm.used list.  This
-  /// does not return true for things in llvm.compiler.used unless they are also
-  /// in llvm.used.
-  bool isUsedFunction(const Function *F) const {
-    return UsedFunctions.count(F);
-  }
-
   /// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
   ///
   void addCatchTypeInfo(MachineBasicBlock *LandingPad,
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 2e3b83a0952..04b936afa06 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -172,7 +172,6 @@ void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
 
 bool AsmPrinter::doInitialization(Module &M) {
   MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-  MMI->AnalyzeModule(M);
 
   // Initialize TargetLoweringObjectFile.
   const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
diff --git a/lib/CodeGen/MachineModuleInfo.cpp b/lib/CodeGen/MachineModuleInfo.cpp
index eec984f53b9..5c544f163fc 100644
--- a/lib/CodeGen/MachineModuleInfo.cpp
+++ b/lib/CodeGen/MachineModuleInfo.cpp
@@ -318,23 +318,6 @@ void MachineModuleInfo::EndFunction() {
   VariableDbgInfos.clear();
 }
 
-/// AnalyzeModule - Scan the module for global debug information.
-///
-void MachineModuleInfo::AnalyzeModule(const Module &M) {
-  // Insert functions in the llvm.used array (but not llvm.compiler.used) into
-  // UsedFunctions.
-  const GlobalVariable *GV = M.getGlobalVariable("llvm.used");
-  if (!GV || !GV->hasInitializer()) return;
-
-  // Should be an array of 'i8*'.
-  const ConstantArray *InitList = cast<ConstantArray>(GV->getInitializer());
-
-  for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
-    if (const Function *F =
-          dyn_cast<Function>(InitList->getOperand(i)->stripPointerCasts()))
-      UsedFunctions.insert(F);
-}
-
 //===- Address of Block Management ----------------------------------------===//
 
 
diff --git a/lib/Target/NVPTX/NVPTXAsmPrinter.cpp b/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
index 6e9982ac634..7511a76fff0 100644
--- a/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
+++ b/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
@@ -818,7 +818,6 @@ bool NVPTXAsmPrinter::doInitialization(Module &M) {
   raw_svector_ostream OS1(Str1);
 
   MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-  MMI->AnalyzeModule(M);
 
   // We need to call the parent's one explicitly.
   //bool Result = AsmPrinter::doInitialization(M);