FunctionExtractorPass has been superceded by GVExtractorPass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48648 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 0 insertions, 155 deletions

diff --git a/include/llvm/Transforms/IPO.h b/include/llvm/Transforms/IPO.h
index f9890ac6d0..09ad9437a7 100644
--- a/include/llvm/Transforms/IPO.h
+++ b/include/llvm/Transforms/IPO.h
@@ -79,14 +79,6 @@ ModulePass *createGlobalDCEPass();
 
 
 //===----------------------------------------------------------------------===//
-/// createFunctionExtractionPass - If deleteFn is true, this pass deletes as
-/// the specified function. Otherwise, it deletes as much of the module as
-/// possible, except for the function specified.
-///
-ModulePass *createFunctionExtractionPass(Function *F, bool deleteFn = false,
-                                         bool relinkCallees = false);
-
-//===----------------------------------------------------------------------===//
 /// createGVExtractionPass - If deleteFn is true, this pass deletes as
 /// the specified global values. Otherwise, it deletes as much of the module as
 /// possible, except for the global values specified.
diff --git a/lib/Transforms/IPO/ExtractFunction.cpp b/lib/Transforms/IPO/ExtractFunction.cpp
deleted file mode 100644
index 918d52d17a..0000000000
--- a/lib/Transforms/IPO/ExtractFunction.cpp
+++ /dev/null
@@ -1,147 +0,0 @@
-//===-- ExtractFunction.cpp - Function extraction pass --------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This pass extracts
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Instructions.h"
-#include "llvm/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Transforms/IPO.h"
-#include "llvm/Support/Compiler.h"
-using namespace llvm;
-
-namespace {
-  /// @brief A pass to extract specific functions and their dependencies.
-  class VISIBILITY_HIDDEN FunctionExtractorPass : public ModulePass {
-    Function *Named;
-    bool deleteFunc;
-    bool reLink;
-  public:
-    static char ID; // Pass identification, replacement for typeid
-
-    /// FunctionExtractorPass - If deleteFn is true, this pass deletes as the
-    /// specified function. Otherwise, it deletes as much of the module as
-    /// possible, except for the function specified.
-    ///
-    explicit FunctionExtractorPass(Function *F = 0, bool deleteFn = true,
-                                   bool relinkCallees = false)
-      : ModulePass((intptr_t)&ID), Named(F), deleteFunc(deleteFn), 
-      reLink(relinkCallees) {}
-
-    bool runOnModule(Module &M) {
-      if (Named == 0) {
-        Named = M.getFunction("main");
-        if (Named == 0) return false;  // No function to extract
-      }
-      
-      if (deleteFunc)
-        return deleteFunction();
-      M.setModuleInlineAsm("");
-      return isolateFunction(M);
-    }
-
-    bool deleteFunction() {
-      // If we're in relinking mode, set linkage of all internal callees to
-      // external. This will allow us extract function, and then - link
-      // everything together
-      if (reLink) {
-        for (Function::iterator B = Named->begin(), BE = Named->end();
-             B != BE; ++B) {
-          for (BasicBlock::iterator I = B->begin(), E = B->end();
-               I != E; ++I) {
-            if (CallInst* callInst = dyn_cast<CallInst>(&*I)) {
-              Function* Callee = callInst->getCalledFunction();
-              if (Callee && Callee->hasInternalLinkage())
-                Callee->setLinkage(GlobalValue::ExternalLinkage);
-            }
-          }
-        }
-      }
-      
-      Named->setLinkage(GlobalValue::ExternalLinkage);
-      Named->deleteBody();
-      assert(Named->isDeclaration() && "This didn't make the function external!");
-      return true;
-    }
-
-    bool isolateFunction(Module &M) {
-      // Make sure our result is globally accessible...
-      Named->setLinkage(GlobalValue::ExternalLinkage);
-
-      // Mark all global variables internal
-      for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
-        if (!I->isDeclaration()) {
-          I->setInitializer(0);  // Make all variables external
-          I->setLinkage(GlobalValue::ExternalLinkage);
-        }
-
-      // All of the functions may be used by global variables or the named
-      // function.  Loop through them and create a new, external functions that
-      // can be "used", instead of ones with bodies.
-      std::vector<Function*> NewFunctions;
-
-      Function *Last = --M.end();  // Figure out where the last real fn is.
-
-      for (Module::iterator I = M.begin(); ; ++I) {
-        if (&*I != Named) {
-          Function *New = new Function(I->getFunctionType(),
-                                       GlobalValue::ExternalLinkage);
-          New->setCallingConv(I->getCallingConv());
-          New->setParamAttrs(I->getParamAttrs());
-          if (I->hasCollector())
-            New->setCollector(I->getCollector());
-
-          // If it's not the named function, delete the body of the function
-          I->dropAllReferences();
-
-          M.getFunctionList().push_back(New);
-          NewFunctions.push_back(New);
-          New->takeName(I);
-        }
-
-        if (&*I == Last) break;  // Stop after processing the last function
-      }
-
-      // Now that we have replacements all set up, loop through the module,
-      // deleting the old functions, replacing them with the newly created
-      // functions.
-      if (!NewFunctions.empty()) {
-        unsigned FuncNum = 0;
-        Module::iterator I = M.begin();
-        do {
-          if (&*I != Named) {
-            // Make everything that uses the old function use the new dummy fn
-            I->replaceAllUsesWith(NewFunctions[FuncNum++]);
-
-            Function *Old = I;
-            ++I;  // Move the iterator to the new function
-
-            // Delete the old function!
-            M.getFunctionList().erase(Old);
-
-          } else {
-            ++I;  // Skip the function we are extracting
-          }
-        } while (&*I != NewFunctions[0]);
-      }
-
-      return true;
-    }
-  };
-
-  char FunctionExtractorPass::ID = 0;
-  RegisterPass<FunctionExtractorPass> X("extract", "Function Extractor");
-}
-
-ModulePass *llvm::createFunctionExtractionPass(Function *F, bool deleteFn,
-                                               bool relinkCallees) {
-  return new FunctionExtractorPass(F, deleteFn, relinkCallees);
-}