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| author | 2020-08-03 15:06:44 +0000 | |
|---|---|---|
| committer | 2020-08-03 15:06:44 +0000 | |
| commit | b64793999546ed8adebaeebd9d8345d18db8927d (patch) | |
| tree | 4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/lib/Analysis/CallGraph.cpp | |
| parent | Add support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff) | |
| download | wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.tar.xz wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.zip | |
Remove LLVM 8.0.1 files.
Diffstat (limited to 'gnu/llvm/lib/Analysis/CallGraph.cpp')
| -rw-r--r-- | gnu/llvm/lib/Analysis/CallGraph.cpp | 328 |
1 files changed, 0 insertions, 328 deletions
diff --git a/gnu/llvm/lib/Analysis/CallGraph.cpp b/gnu/llvm/lib/Analysis/CallGraph.cpp deleted file mode 100644 index 0da678e1611..00000000000 --- a/gnu/llvm/lib/Analysis/CallGraph.cpp +++ /dev/null @@ -1,328 +0,0 @@ -//===- CallGraph.cpp - Build a Module's call graph ------------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "llvm/Analysis/CallGraph.h" -#include "llvm/ADT/STLExtras.h" -#include "llvm/ADT/SmallVector.h" -#include "llvm/Config/llvm-config.h" -#include "llvm/IR/CallSite.h" -#include "llvm/IR/Module.h" -#include "llvm/IR/Function.h" -#include "llvm/IR/Intrinsics.h" -#include "llvm/IR/PassManager.h" -#include "llvm/Pass.h" -#include "llvm/Support/Compiler.h" -#include "llvm/Support/Debug.h" -#include "llvm/Support/raw_ostream.h" -#include <algorithm> -#include <cassert> - -using namespace llvm; - -//===----------------------------------------------------------------------===// -// Implementations of the CallGraph class methods. -// - -CallGraph::CallGraph(Module &M) - : M(M), ExternalCallingNode(getOrInsertFunction(nullptr)), - CallsExternalNode(llvm::make_unique<CallGraphNode>(nullptr)) { - // Add every function to the call graph. - for (Function &F : M) - addToCallGraph(&F); -} - -CallGraph::CallGraph(CallGraph &&Arg) - : M(Arg.M), FunctionMap(std::move(Arg.FunctionMap)), - ExternalCallingNode(Arg.ExternalCallingNode), - CallsExternalNode(std::move(Arg.CallsExternalNode)) { - Arg.FunctionMap.clear(); - Arg.ExternalCallingNode = nullptr; -} - -CallGraph::~CallGraph() { - // CallsExternalNode is not in the function map, delete it explicitly. - if (CallsExternalNode) - CallsExternalNode->allReferencesDropped(); - -// Reset all node's use counts to zero before deleting them to prevent an -// assertion from firing. -#ifndef NDEBUG - for (auto &I : FunctionMap) - I.second->allReferencesDropped(); -#endif -} - -void CallGraph::addToCallGraph(Function *F) { - CallGraphNode *Node = getOrInsertFunction(F); - - // If this function has external linkage or has its address taken, anything - // could call it. - if (!F->hasLocalLinkage() || F->hasAddressTaken()) - ExternalCallingNode->addCalledFunction(CallSite(), Node); - - // If this function is not defined in this translation unit, it could call - // anything. - if (F->isDeclaration() && !F->isIntrinsic()) - Node->addCalledFunction(CallSite(), CallsExternalNode.get()); - - // Look for calls by this function. - for (BasicBlock &BB : *F) - for (Instruction &I : BB) { - if (auto CS = CallSite(&I)) { - const Function *Callee = CS.getCalledFunction(); - if (!Callee || !Intrinsic::isLeaf(Callee->getIntrinsicID())) - // Indirect calls of intrinsics are not allowed so no need to check. - // We can be more precise here by using TargetArg returned by - // Intrinsic::isLeaf. - Node->addCalledFunction(CS, CallsExternalNode.get()); - else if (!Callee->isIntrinsic()) - Node->addCalledFunction(CS, getOrInsertFunction(Callee)); - } - } -} - -void CallGraph::print(raw_ostream &OS) const { - // Print in a deterministic order by sorting CallGraphNodes by name. We do - // this here to avoid slowing down the non-printing fast path. - - SmallVector<CallGraphNode *, 16> Nodes; - Nodes.reserve(FunctionMap.size()); - - for (const auto &I : *this) - Nodes.push_back(I.second.get()); - - llvm::sort(Nodes, [](CallGraphNode *LHS, CallGraphNode *RHS) { - if (Function *LF = LHS->getFunction()) - if (Function *RF = RHS->getFunction()) - return LF->getName() < RF->getName(); - - return RHS->getFunction() != nullptr; - }); - - for (CallGraphNode *CN : Nodes) - CN->print(OS); -} - -#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) -LLVM_DUMP_METHOD void CallGraph::dump() const { print(dbgs()); } -#endif - -// removeFunctionFromModule - Unlink the function from this module, returning -// it. Because this removes the function from the module, the call graph node -// is destroyed. This is only valid if the function does not call any other -// functions (ie, there are no edges in it's CGN). The easiest way to do this -// is to dropAllReferences before calling this. -// -Function *CallGraph::removeFunctionFromModule(CallGraphNode *CGN) { - assert(CGN->empty() && "Cannot remove function from call " - "graph if it references other functions!"); - Function *F = CGN->getFunction(); // Get the function for the call graph node - FunctionMap.erase(F); // Remove the call graph node from the map - - M.getFunctionList().remove(F); - return F; -} - -/// spliceFunction - Replace the function represented by this node by another. -/// This does not rescan the body of the function, so it is suitable when -/// splicing the body of the old function to the new while also updating all -/// callers from old to new. -void CallGraph::spliceFunction(const Function *From, const Function *To) { - assert(FunctionMap.count(From) && "No CallGraphNode for function!"); - assert(!FunctionMap.count(To) && - "Pointing CallGraphNode at a function that already exists"); - FunctionMapTy::iterator I = FunctionMap.find(From); - I->second->F = const_cast<Function*>(To); - FunctionMap[To] = std::move(I->second); - FunctionMap.erase(I); -} - -// getOrInsertFunction - This method is identical to calling operator[], but -// it will insert a new CallGraphNode for the specified function if one does -// not already exist. -CallGraphNode *CallGraph::getOrInsertFunction(const Function *F) { - auto &CGN = FunctionMap[F]; - if (CGN) - return CGN.get(); - - assert((!F || F->getParent() == &M) && "Function not in current module!"); - CGN = llvm::make_unique<CallGraphNode>(const_cast<Function *>(F)); - return CGN.get(); -} - -//===----------------------------------------------------------------------===// -// Implementations of the CallGraphNode class methods. -// - -void CallGraphNode::print(raw_ostream &OS) const { - if (Function *F = getFunction()) - OS << "Call graph node for function: '" << F->getName() << "'"; - else - OS << "Call graph node <<null function>>"; - - OS << "<<" << this << ">> #uses=" << getNumReferences() << '\n'; - - for (const auto &I : *this) { - OS << " CS<" << I.first << "> calls "; - if (Function *FI = I.second->getFunction()) - OS << "function '" << FI->getName() <<"'\n"; - else - OS << "external node\n"; - } - OS << '\n'; -} - -#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) -LLVM_DUMP_METHOD void CallGraphNode::dump() const { print(dbgs()); } -#endif - -/// removeCallEdgeFor - This method removes the edge in the node for the -/// specified call site. Note that this method takes linear time, so it -/// should be used sparingly. -void CallGraphNode::removeCallEdgeFor(CallSite CS) { - for (CalledFunctionsVector::iterator I = CalledFunctions.begin(); ; ++I) { - assert(I != CalledFunctions.end() && "Cannot find callsite to remove!"); - if (I->first == CS.getInstruction()) { - I->second->DropRef(); - *I = CalledFunctions.back(); - CalledFunctions.pop_back(); - return; - } - } -} - -// removeAnyCallEdgeTo - This method removes any call edges from this node to -// the specified callee function. This takes more time to execute than -// removeCallEdgeTo, so it should not be used unless necessary. -void CallGraphNode::removeAnyCallEdgeTo(CallGraphNode *Callee) { - for (unsigned i = 0, e = CalledFunctions.size(); i != e; ++i) - if (CalledFunctions[i].second == Callee) { - Callee->DropRef(); - CalledFunctions[i] = CalledFunctions.back(); - CalledFunctions.pop_back(); - --i; --e; - } -} - -/// removeOneAbstractEdgeTo - Remove one edge associated with a null callsite -/// from this node to the specified callee function. -void CallGraphNode::removeOneAbstractEdgeTo(CallGraphNode *Callee) { - for (CalledFunctionsVector::iterator I = CalledFunctions.begin(); ; ++I) { - assert(I != CalledFunctions.end() && "Cannot find callee to remove!"); - CallRecord &CR = *I; - if (CR.second == Callee && CR.first == nullptr) { - Callee->DropRef(); - *I = CalledFunctions.back(); - CalledFunctions.pop_back(); - return; - } - } -} - -/// replaceCallEdge - This method replaces the edge in the node for the -/// specified call site with a new one. Note that this method takes linear -/// time, so it should be used sparingly. -void CallGraphNode::replaceCallEdge(CallSite CS, - CallSite NewCS, CallGraphNode *NewNode){ - for (CalledFunctionsVector::iterator I = CalledFunctions.begin(); ; ++I) { - assert(I != CalledFunctions.end() && "Cannot find callsite to remove!"); - if (I->first == CS.getInstruction()) { - I->second->DropRef(); - I->first = NewCS.getInstruction(); - I->second = NewNode; - NewNode->AddRef(); - return; - } - } -} - -// Provide an explicit template instantiation for the static ID. -AnalysisKey CallGraphAnalysis::Key; - -PreservedAnalyses CallGraphPrinterPass::run(Module &M, - ModuleAnalysisManager &AM) { - AM.getResult<CallGraphAnalysis>(M).print(OS); - return PreservedAnalyses::all(); -} - -//===----------------------------------------------------------------------===// -// Out-of-line definitions of CallGraphAnalysis class members. -// - -//===----------------------------------------------------------------------===// -// Implementations of the CallGraphWrapperPass class methods. -// - -CallGraphWrapperPass::CallGraphWrapperPass() : ModulePass(ID) { - initializeCallGraphWrapperPassPass(*PassRegistry::getPassRegistry()); -} - -CallGraphWrapperPass::~CallGraphWrapperPass() = default; - -void CallGraphWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const { - AU.setPreservesAll(); -} - -bool CallGraphWrapperPass::runOnModule(Module &M) { - // All the real work is done in the constructor for the CallGraph. - G.reset(new CallGraph(M)); - return false; -} - -INITIALIZE_PASS(CallGraphWrapperPass, "basiccg", "CallGraph Construction", - false, true) - -char CallGraphWrapperPass::ID = 0; - -void CallGraphWrapperPass::releaseMemory() { G.reset(); } - -void CallGraphWrapperPass::print(raw_ostream &OS, const Module *) const { - if (!G) { - OS << "No call graph has been built!\n"; - return; - } - - // Just delegate. - G->print(OS); -} - -#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) -LLVM_DUMP_METHOD -void CallGraphWrapperPass::dump() const { print(dbgs(), nullptr); } -#endif - -namespace { - -struct CallGraphPrinterLegacyPass : public ModulePass { - static char ID; // Pass ID, replacement for typeid - - CallGraphPrinterLegacyPass() : ModulePass(ID) { - initializeCallGraphPrinterLegacyPassPass(*PassRegistry::getPassRegistry()); - } - - void getAnalysisUsage(AnalysisUsage &AU) const override { - AU.setPreservesAll(); - AU.addRequiredTransitive<CallGraphWrapperPass>(); - } - - bool runOnModule(Module &M) override { - getAnalysis<CallGraphWrapperPass>().print(errs(), &M); - return false; - } -}; - -} // end anonymous namespace - -char CallGraphPrinterLegacyPass::ID = 0; - -INITIALIZE_PASS_BEGIN(CallGraphPrinterLegacyPass, "print-callgraph", - "Print a call graph", true, true) -INITIALIZE_PASS_DEPENDENCY(CallGraphWrapperPass) -INITIALIZE_PASS_END(CallGraphPrinterLegacyPass, "print-callgraph", - "Print a call graph", true, true) |
