mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51784 91177308-0d34-0410-b5e6-96231b3b80d8
443 lines
13 KiB
C++
443 lines
13 KiB
C++
//===--- CompilationGraph.cpp - The LLVM Compiler Driver --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open
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// Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Compilation graph - implementation.
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//
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//===----------------------------------------------------------------------===//
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#include "Error.h"
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#include "CompilationGraph.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/DOTGraphTraits.h"
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#include "llvm/Support/GraphWriter.h"
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#include <algorithm>
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#include <iterator>
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#include <limits>
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#include <queue>
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#include <stdexcept>
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using namespace llvm;
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using namespace llvmc;
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extern cl::list<std::string> InputFilenames;
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extern cl::opt<std::string> OutputFilename;
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extern cl::list<std::string> Languages;
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namespace llvmc {
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/// ExtsToLangs - Map from file extensions to language names.
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LanguageMap GlobalLanguageMap;
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/// GetLanguage - Find the language name corresponding to the given file.
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const std::string& GetLanguage(const sys::Path& File) {
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LanguageMap::const_iterator Lang = GlobalLanguageMap.find(File.getSuffix());
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if (Lang == GlobalLanguageMap.end())
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throw std::runtime_error("Unknown suffix: " + File.getSuffix());
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return Lang->second;
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}
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}
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namespace {
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/// ChooseEdge - Return the edge with the maximum weight.
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template <class C>
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const Edge* ChooseEdge(const C& EdgesContainer,
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const InputLanguagesSet& InLangs,
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const std::string& NodeName = "root") {
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const Edge* MaxEdge = 0;
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unsigned MaxWeight = 0;
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bool SingleMax = true;
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for (typename C::const_iterator B = EdgesContainer.begin(),
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E = EdgesContainer.end(); B != E; ++B) {
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const Edge* E = B->getPtr();
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unsigned EW = E->Weight(InLangs);
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if (EW > MaxWeight) {
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MaxEdge = E;
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MaxWeight = EW;
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SingleMax = true;
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} else if (EW == MaxWeight) {
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SingleMax = false;
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}
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}
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if (!SingleMax)
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throw std::runtime_error("Node " + NodeName +
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": multiple maximal outward edges found!"
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" Most probably a specification error.");
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if (!MaxEdge)
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throw std::runtime_error("Node " + NodeName +
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": no maximal outward edge found!"
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" Most probably a specification error.");
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return MaxEdge;
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}
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}
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CompilationGraph::CompilationGraph() {
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NodesMap["root"] = Node(this);
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}
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Node& CompilationGraph::getNode(const std::string& ToolName) {
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nodes_map_type::iterator I = NodesMap.find(ToolName);
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if (I == NodesMap.end())
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throw std::runtime_error("Node " + ToolName + " is not in the graph");
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return I->second;
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}
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const Node& CompilationGraph::getNode(const std::string& ToolName) const {
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nodes_map_type::const_iterator I = NodesMap.find(ToolName);
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if (I == NodesMap.end())
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throw std::runtime_error("Node " + ToolName + " is not in the graph!");
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return I->second;
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}
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// Find the tools list corresponding to the given language name.
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const CompilationGraph::tools_vector_type&
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CompilationGraph::getToolsVector(const std::string& LangName) const
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{
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tools_map_type::const_iterator I = ToolsMap.find(LangName);
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if (I == ToolsMap.end())
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throw std::runtime_error("No tool corresponding to the language "
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+ LangName + " found");
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return I->second;
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}
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void CompilationGraph::insertNode(Tool* V) {
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if (NodesMap.count(V->Name()) == 0) {
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Node N;
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N.OwningGraph = this;
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N.ToolPtr = V;
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NodesMap[V->Name()] = N;
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}
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}
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void CompilationGraph::insertEdge(const std::string& A, Edge* Edg) {
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Node& B = getNode(Edg->ToolName());
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if (A == "root") {
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const char** InLangs = B.ToolPtr->InputLanguages();
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for (;*InLangs; ++InLangs)
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ToolsMap[*InLangs].push_back(IntrusiveRefCntPtr<Edge>(Edg));
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NodesMap["root"].AddEdge(Edg);
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}
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else {
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Node& N = getNode(A);
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N.AddEdge(Edg);
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}
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// Increase the inward edge counter.
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B.IncrInEdges();
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}
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namespace {
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sys::Path MakeTempFile(const sys::Path& TempDir, const std::string& BaseName,
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const std::string& Suffix) {
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sys::Path Out;
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// Make sure we don't end up with path names like '/file.o' if the
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// TempDir is empty.
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if (TempDir.empty()) {
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Out.set(BaseName);
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}
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else {
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Out = TempDir;
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Out.appendComponent(BaseName);
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}
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Out.appendSuffix(Suffix);
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// NOTE: makeUnique always *creates* a unique temporary file,
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// which is good, since there will be no races. However, some
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// tools do not like it when the output file already exists, so
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// they have to be placated with -f or something like that.
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Out.makeUnique(true, NULL);
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return Out;
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}
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}
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// Pass input file through the chain until we bump into a Join node or
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// a node that says that it is the last.
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void CompilationGraph::PassThroughGraph (const sys::Path& InFile,
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const Node* StartNode,
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const InputLanguagesSet& InLangs,
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const sys::Path& TempDir) const {
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bool Last = false;
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sys::Path In = InFile;
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const Node* CurNode = StartNode;
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while(!Last) {
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sys::Path Out;
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Tool* CurTool = CurNode->ToolPtr.getPtr();
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if (CurTool->IsJoin()) {
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JoinTool& JT = dynamic_cast<JoinTool&>(*CurTool);
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JT.AddToJoinList(In);
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break;
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}
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// Since toolchains do not have to end with a Join node, we should
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// check if this Node is the last.
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if (!CurNode->HasChildren() || CurTool->IsLast()) {
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if (!OutputFilename.empty()) {
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Out.set(OutputFilename);
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}
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else {
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Out.set(In.getBasename());
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Out.appendSuffix(CurTool->OutputSuffix());
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}
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Last = true;
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}
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else {
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Out = MakeTempFile(TempDir, In.getBasename(), CurTool->OutputSuffix());
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}
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if (int ret = CurTool->GenerateAction(In, Out, InLangs).Execute())
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throw error_code(ret);
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if (Last)
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return;
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CurNode = &getNode(ChooseEdge(CurNode->OutEdges,
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InLangs,
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CurNode->Name())->ToolName());
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In = Out; Out.clear();
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}
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}
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// Find the head of the toolchain corresponding to the given file.
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// Also, insert an input language into InLangs.
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const Node* CompilationGraph::
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FindToolChain(const sys::Path& In, const std::string* forceLanguage,
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InputLanguagesSet& InLangs) const {
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// Determine the input language.
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const std::string& InLanguage =
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forceLanguage ? *forceLanguage : GetLanguage(In);
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// Add the current input language to the input language set.
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InLangs.insert(InLanguage);
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// Find the toolchain for the input language.
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const tools_vector_type& TV = getToolsVector(InLanguage);
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if (TV.empty())
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throw std::runtime_error("No toolchain corresponding to language "
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+ InLanguage + " found");
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return &getNode(ChooseEdge(TV, InLangs)->ToolName());
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}
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// Helper function used by Build().
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// Traverses initial portions of the toolchains (up to the first Join node).
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// This function is also responsible for handling the -x option.
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void CompilationGraph::BuildInitial (InputLanguagesSet& InLangs,
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const sys::Path& TempDir) {
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// This is related to -x option handling.
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cl::list<std::string>::const_iterator xIter = Languages.begin(),
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xBegin = xIter, xEnd = Languages.end();
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bool xEmpty = true;
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const std::string* xLanguage = 0;
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unsigned xPos = 0, xPosNext = 0, filePos = 0;
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if (xIter != xEnd) {
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xEmpty = false;
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xPos = Languages.getPosition(xIter - xBegin);
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cl::list<std::string>::const_iterator xNext = llvm::next(xIter);
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xPosNext = (xNext == xEnd) ? std::numeric_limits<unsigned>::max()
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: Languages.getPosition(xNext - xBegin);
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xLanguage = (*xIter == "none") ? 0 : &(*xIter);
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}
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// For each input file:
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for (cl::list<std::string>::const_iterator B = InputFilenames.begin(),
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CB = B, E = InputFilenames.end(); B != E; ++B) {
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sys::Path In = sys::Path(*B);
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// Code for handling the -x option.
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// Output: std::string* xLanguage (can be NULL).
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if (!xEmpty) {
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filePos = InputFilenames.getPosition(B - CB);
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if (xPos < filePos) {
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if (filePos < xPosNext) {
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xLanguage = (*xIter == "none") ? 0 : &(*xIter);
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}
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else { // filePos >= xPosNext
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// Skip xIters while filePos > xPosNext
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while (filePos > xPosNext) {
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++xIter;
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xPos = xPosNext;
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cl::list<std::string>::const_iterator xNext = llvm::next(xIter);
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if (xNext == xEnd)
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xPosNext = std::numeric_limits<unsigned>::max();
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else
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xPosNext = Languages.getPosition(xNext - xBegin);
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xLanguage = (*xIter == "none") ? 0 : &(*xIter);
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}
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}
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}
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}
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// Find the toolchain corresponding to this file.
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const Node* N = FindToolChain(In, xLanguage, InLangs);
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// Pass file through the chain starting at head.
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PassThroughGraph(In, N, InLangs, TempDir);
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}
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}
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// Sort the nodes in topological order.
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void CompilationGraph::TopologicalSort(std::vector<const Node*>& Out) {
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std::queue<const Node*> Q;
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Q.push(&getNode("root"));
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while (!Q.empty()) {
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const Node* A = Q.front();
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Q.pop();
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Out.push_back(A);
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for (Node::const_iterator EB = A->EdgesBegin(), EE = A->EdgesEnd();
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EB != EE; ++EB) {
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Node* B = &getNode((*EB)->ToolName());
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B->DecrInEdges();
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if (B->HasNoInEdges())
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Q.push(B);
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}
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}
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}
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namespace {
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bool NotJoinNode(const Node* N) {
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return N->ToolPtr ? !N->ToolPtr->IsJoin() : true;
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}
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}
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// Call TopologicalSort and filter the resulting list to include
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// only Join nodes.
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void CompilationGraph::
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TopologicalSortFilterJoinNodes(std::vector<const Node*>& Out) {
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std::vector<const Node*> TopSorted;
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TopologicalSort(TopSorted);
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std::remove_copy_if(TopSorted.begin(), TopSorted.end(),
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std::back_inserter(Out), NotJoinNode);
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}
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int CompilationGraph::Build (const sys::Path& TempDir) {
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InputLanguagesSet InLangs;
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// Traverse initial parts of the toolchains and fill in InLangs.
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BuildInitial(InLangs, TempDir);
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std::vector<const Node*> JTV;
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TopologicalSortFilterJoinNodes(JTV);
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// For all join nodes in topological order:
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for (std::vector<const Node*>::iterator B = JTV.begin(), E = JTV.end();
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B != E; ++B) {
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sys::Path Out;
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const Node* CurNode = *B;
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JoinTool* JT = &dynamic_cast<JoinTool&>(*CurNode->ToolPtr.getPtr());
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bool IsLast = false;
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// Are there any files in the join list?
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if (JT->JoinListEmpty())
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continue;
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// Is this the last tool in the toolchain?
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// NOTE: we can process several toolchains in parallel.
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if (!CurNode->HasChildren() || JT->IsLast()) {
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if (OutputFilename.empty()) {
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Out.set("a");
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Out.appendSuffix(JT->OutputSuffix());
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}
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else
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Out.set(OutputFilename);
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IsLast = true;
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}
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else {
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Out = MakeTempFile(TempDir, "tmp", JT->OutputSuffix());
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}
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if (int ret = JT->GenerateAction(Out, InLangs).Execute())
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throw error_code(ret);
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if (!IsLast) {
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const Node* NextNode =
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&getNode(ChooseEdge(CurNode->OutEdges, InLangs,
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CurNode->Name())->ToolName());
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PassThroughGraph(Out, NextNode, InLangs, TempDir);
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}
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}
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return 0;
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}
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// Code related to graph visualization.
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namespace llvm {
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template <>
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struct DOTGraphTraits<llvmc::CompilationGraph*>
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: public DefaultDOTGraphTraits
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{
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template<typename GraphType>
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static std::string getNodeLabel(const Node* N, const GraphType&)
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{
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if (N->ToolPtr)
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if (N->ToolPtr->IsJoin())
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return N->Name() + "\n (join" +
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(N->HasChildren() ? ")"
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: std::string(": ") + N->ToolPtr->OutputLanguage() + ')');
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else
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return N->Name();
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else
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return "root";
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}
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template<typename EdgeIter>
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static std::string getEdgeSourceLabel(const Node* N, EdgeIter I) {
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if (N->ToolPtr) {
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return N->ToolPtr->OutputLanguage();
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}
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else {
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const char** InLangs = I->ToolPtr->InputLanguages();
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std::string ret;
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for (; *InLangs; ++InLangs) {
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if (*(InLangs + 1)) {
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ret += *InLangs;
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ret += ", ";
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}
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else {
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ret += *InLangs;
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}
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}
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return ret;
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}
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}
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};
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}
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void CompilationGraph::writeGraph() {
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std::ofstream O("compilation-graph.dot");
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if (O.good()) {
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llvm::WriteGraph(this, "compilation-graph");
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O.close();
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}
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else {
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throw std::runtime_error("Error opening file 'compilation-graph.dot'"
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" for writing!");
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}
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}
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void CompilationGraph::viewGraph() {
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llvm::ViewGraph(this, "compilation-graph");
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}
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