llvm-6502/tools/llvmc2/CompilationGraph.h
2008-05-06 17:26:53 +00:00

271 lines
8.2 KiB
C++

//===--- CompilationGraph.h - 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 - definition.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVMC2_COMPILATION_GRAPH_H
#define LLVM_TOOLS_LLVMC2_COMPILATION_GRAPH_H
#include "AutoGenerated.h"
#include "Tool.h"
#include "llvm/ADT/GraphTraits.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/iterator"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/System/Path.h"
#include <string>
namespace llvmcc {
// An edge in the graph.
class Edge : public llvm::RefCountedBaseVPTR<Edge> {
public:
Edge(const std::string& T) : ToolName_(T) {}
virtual ~Edge() {};
const std::string& ToolName() const { return ToolName_; }
virtual bool isEnabled() const = 0;
virtual bool isDefault() const = 0;
private:
std::string ToolName_;
};
// Edges with no properties are instances of this class.
class SimpleEdge : public Edge {
public:
SimpleEdge(const std::string& T) : Edge(T) {}
bool isEnabled() const { return false;}
bool isDefault() const { return true;}
};
// A node in the graph.
struct Node {
typedef llvm::SmallVector<llvm::IntrusiveRefCntPtr<Edge>, 3> container_type;
typedef container_type::iterator iterator;
typedef container_type::const_iterator const_iterator;
Node() : OwningGraph(0), InEdges(0) {}
Node(CompilationGraph* G) : OwningGraph(G), InEdges(0) {}
Node(CompilationGraph* G, Tool* T) :
OwningGraph(G), ToolPtr(T), InEdges(0) {}
bool HasChildren() const { return !OutEdges.empty(); }
const std::string Name() const { return ToolPtr->Name(); }
// Iteration.
iterator EdgesBegin() { return OutEdges.begin(); }
const_iterator EdgesBegin() const { return OutEdges.begin(); }
iterator EdgesEnd() { return OutEdges.end(); }
const_iterator EdgesEnd() const { return OutEdges.end(); }
// Choose one of the outward edges based on command-line options.
const Edge* ChooseEdge() const;
// Add an outward edge. Takes ownership of the Edge object.
void AddEdge(Edge* E)
{ OutEdges.push_back(llvm::IntrusiveRefCntPtr<Edge>(E)); }
// Inward edge counter. Used by Build() to implement topological
// sort.
void IncrInEdges() { ++InEdges; }
void DecrInEdges() { --InEdges; }
bool HasNoInEdges() const { return InEdges == 0; }
// Needed to implement NodeChildIterator/GraphTraits
CompilationGraph* OwningGraph;
// The corresponding Tool.
llvm::IntrusiveRefCntPtr<Tool> ToolPtr;
// Links to children.
container_type OutEdges;
// Number of parents.
unsigned InEdges;
};
class NodesIterator;
class CompilationGraph {
typedef llvm::SmallVector<std::string, 3> tools_vector_type;
typedef llvm::StringMap<tools_vector_type> tools_map_type;
typedef llvm::StringMap<Node> nodes_map_type;
// Map from file extensions to language names.
LanguageMap ExtsToLangs;
// Map from language names to lists of tool names.
tools_map_type ToolsMap;
// Map from tool names to Tool objects.
nodes_map_type NodesMap;
public:
CompilationGraph();
// insertVertex - insert a new node into the graph. Takes
// ownership of the object.
void insertNode(Tool* T);
// insertEdge - Insert a new edge into the graph. Takes ownership
// of the Edge object.
void insertEdge(const std::string& A, Edge* E);
// Build - Build target(s) from the input file set. Command-line
// options are passed implicitly as global variables.
int Build(llvm::sys::Path const& tempDir) const;
// Return a reference to the node correponding to the given tool
// name. Throws std::runtime_error.
Node& getNode(const std::string& ToolName);
const Node& getNode(const std::string& ToolName) const;
// viewGraph - This function is meant for use from the debugger.
// You can just say 'call G->viewGraph()' and a ghostview window
// should pop up from the program, displaying the compilation
// graph. This depends on there being a 'dot' and 'gv' program
// in your path.
void viewGraph();
// Write a CompilationGraph.dot file.
void writeGraph();
// GraphTraits support
friend NodesIterator GraphBegin(CompilationGraph*);
friend NodesIterator GraphEnd(CompilationGraph*);
friend void PopulateCompilationGraph(CompilationGraph&);
private:
// Helper functions.
// Find out which language corresponds to the suffix of this file.
const std::string& getLanguage(const llvm::sys::Path& File) const;
// Return a reference to the list of tool names corresponding to
// the given language name. Throws std::runtime_error.
const tools_vector_type& getToolsVector(const std::string& LangName) const;
// Pass the input file through the toolchain.
const JoinTool* PassThroughGraph (llvm::sys::Path& In, llvm::sys::Path Out,
const llvm::sys::Path& TempDir) const;
};
/// GraphTraits support code.
// Auxiliary class needed to implement GraphTraits support. Can be
// generalised to something like value_iterator for map-like
// containers.
class NodesIterator : public llvm::StringMap<Node>::iterator {
typedef llvm::StringMap<Node>::iterator super;
typedef NodesIterator ThisType;
typedef Node* pointer;
typedef Node& reference;
public:
NodesIterator(super I) : super(I) {}
inline reference operator*() const {
return super::operator->()->second;
}
inline pointer operator->() const {
return &super::operator->()->second;
}
};
inline NodesIterator GraphBegin(CompilationGraph* G) {
return NodesIterator(G->NodesMap.begin());
}
inline NodesIterator GraphEnd(CompilationGraph* G) {
return NodesIterator(G->NodesMap.end());
}
// Another auxiliary class needed by GraphTraits.
class NodeChildIterator : public bidirectional_iterator<Node, ptrdiff_t> {
typedef NodeChildIterator ThisType;
typedef Node::container_type::iterator iterator;
CompilationGraph* OwningGraph;
iterator EdgeIter;
public:
typedef Node* pointer;
typedef Node& reference;
NodeChildIterator(Node* N, iterator I) :
OwningGraph(N->OwningGraph), EdgeIter(I) {}
const ThisType& operator=(const ThisType& I) {
assert(OwningGraph == I.OwningGraph);
EdgeIter = I.EdgeIter;
return *this;
}
inline bool operator==(const ThisType& I) const
{ return EdgeIter == I.EdgeIter; }
inline bool operator!=(const ThisType& I) const
{ return EdgeIter != I.EdgeIter; }
inline pointer operator*() const {
return &OwningGraph->getNode((*EdgeIter)->ToolName());
}
inline pointer operator->() const {
return &OwningGraph->getNode((*EdgeIter)->ToolName());
}
ThisType& operator++() { ++EdgeIter; return *this; } // Preincrement
ThisType operator++(int) { // Postincrement
ThisType tmp = *this;
++*this;
return tmp;
}
inline ThisType& operator--() { --EdgeIter; return *this; } // Predecrement
inline ThisType operator--(int) { // Postdecrement
ThisType tmp = *this;
--*this;
return tmp;
}
};
}
namespace llvm {
template <>
struct GraphTraits<llvmcc::CompilationGraph*> {
typedef llvmcc::CompilationGraph GraphType;
typedef llvmcc::Node NodeType;
typedef llvmcc::NodeChildIterator ChildIteratorType;
static NodeType* getEntryNode(GraphType* G) {
return &G->getNode("root");
}
static ChildIteratorType child_begin(NodeType* N) {
return ChildIteratorType(N, N->OutEdges.begin());
}
static ChildIteratorType child_end(NodeType* N) {
return ChildIteratorType(N, N->OutEdges.end());
}
typedef llvmcc::NodesIterator nodes_iterator;
static nodes_iterator nodes_begin(GraphType *G) {
return GraphBegin(G);
}
static nodes_iterator nodes_end(GraphType *G) {
return GraphEnd(G);
}
};
}
#endif // LLVM_TOOLS_LLVMC2_COMPILATION_GRAPH_H