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//===--- CompilationGraph.cpp - The LLVM Compiler Driver --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open
// Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Compilation graph - implementation.
//
//===----------------------------------------------------------------------===//
#include "CompilationGraph.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DOTGraphTraits.h"
#include "llvm/Support/GraphWriter.h"
#include <stdexcept>
using namespace llvm;
using namespace llvmcc;
extern cl::list<std::string> InputFilenames;
extern cl::opt<std::string> OutputFilename;
CompilationGraph::CompilationGraph() {
NodesMap["root"] = Node(this);
}
Node& CompilationGraph::getNode(const std::string& ToolName) {
nodes_map_type::iterator I = NodesMap.find(ToolName);
if (I == NodesMap.end())
throw std::runtime_error("Node " + ToolName + " is not in graph");
return I->second;
}
const Node& CompilationGraph::getNode(const std::string& ToolName) const {
nodes_map_type::const_iterator I = NodesMap.find(ToolName);
if (I == NodesMap.end())
throw std::runtime_error("Node " + ToolName + " is not in graph!");
return I->second;
}
const std::string& CompilationGraph::getLanguage(const sys::Path& File) const {
LanguageMap::const_iterator Lang = ExtsToLangs.find(File.getSuffix());
if (Lang == ExtsToLangs.end())
throw std::runtime_error("Unknown suffix: " + File.getSuffix() + '!');
return Lang->second;
}
const CompilationGraph::tools_vector_type&
CompilationGraph::getToolsVector(const std::string& LangName) const
{
tools_map_type::const_iterator I = ToolsMap.find(LangName);
if (I == ToolsMap.end())
throw std::runtime_error("No tools corresponding to " + LangName
+ " found!");
return I->second;
}
void CompilationGraph::insertVertex(const IntrusiveRefCntPtr<Tool> V) {
if (!NodesMap.count(V->Name())) {
Node N;
N.OwningGraph = this;
N.ToolPtr = V;
NodesMap[V->Name()] = N;
}
}
void CompilationGraph::insertEdge(const std::string& A,
const std::string& B) {
// TOTHINK: check this at compile-time?
if (B == "root")
throw std::runtime_error("Edges back to the root are not allowed!"
"Compilation graph should be acyclic!");
if (A == "root") {
const Node& N = getNode(B);
const std::string& InputLanguage = N.ToolPtr->InputLanguage();
ToolsMap[InputLanguage].push_back(B);
// Needed to support iteration via GraphTraits.
NodesMap["root"].Children.push_back(B);
}
else {
Node& NA = getNode(A);
// Check that there is a node at B.
getNode(B);
NA.Children.push_back(B);
}
}
// TOFIX: extend, add an ability to choose between different
// toolchains, support more interesting graph topologies.
int CompilationGraph::Build (const sys::Path& tempDir) const {
PathVector JoinList;
const Tool* JoinTool = 0;
sys::Path In, Out;
// For each input file
for (cl::list<std::string>::const_iterator B = InputFilenames.begin(),
E = InputFilenames.end(); B != E; ++B) {
In = sys::Path(*B);
// Get to the head of the toolchain.
const tools_vector_type& TV = getToolsVector(getLanguage(In));
if(TV.empty())
throw std::runtime_error("Tool names vector is empty!");
const Node* N = &getNode(*TV.begin());
// Pass it through the chain until we bump into a Join node or a
// node that says that it is the last.
bool Last = false;
while(!Last) {
const Tool* CurTool = N->ToolPtr.getPtr();
if(CurTool->IsJoin()) {
JoinList.push_back(In);
JoinTool = CurTool;
break;
}
// Is this the last tool?
if (N->Children.empty() || CurTool->IsLast()) {
Out.appendComponent(In.getBasename());
Out.appendSuffix(CurTool->OutputSuffix());
Last = true;
}
else {
Out = tempDir;
Out.appendComponent(In.getBasename());
Out.appendSuffix(CurTool->OutputSuffix());
Out.makeUnique(true, NULL);
Out.eraseFromDisk();
}
if (CurTool->GenerateAction(In, Out).Execute() != 0)
throw std::runtime_error("Tool returned error code!");
N = &getNode(*N->Children.begin());
In = Out; Out.clear();
}
}
if(JoinTool) {
// If the final output name is empty, set it to "a.out"
if (!OutputFilename.empty()) {
Out = sys::Path(OutputFilename);
}
else {
Out = sys::Path("a");
Out.appendSuffix(JoinTool->OutputSuffix());
}
if (JoinTool->GenerateAction(JoinList, Out).Execute() != 0)
throw std::runtime_error("Tool returned error code!");
}
return 0;
}
namespace llvm {
template <>
struct DOTGraphTraits<llvmcc::CompilationGraph*>
: public DefaultDOTGraphTraits
{
template<typename GraphType>
static std::string getNodeLabel(const Node* N, const GraphType&) {
if (N->ToolPtr)
return N->ToolPtr->Name();
else
return "root";
}
};
}
void CompilationGraph::writeGraph() {
std::ofstream O("CompilationGraph.dot");
if(O.good()) {
llvm::WriteGraph(this, "CompilationGraph");
O.close();
}
else {
throw std::runtime_error("");
}
}
void CompilationGraph::viewGraph() {
llvm::ViewGraph(this, "CompilationGraph");
}
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