mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-10-31 09:11:13 +00:00
f58aefcb20
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9921 91177308-0d34-0410-b5e6-96231b3b80d8
342 lines
13 KiB
C++
342 lines
13 KiB
C++
//===- DSGraph.h - Represent a collection of data structures ----*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This header defines the data structure graph.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ANALYSIS_DSGRAPH_H
|
|
#define LLVM_ANALYSIS_DSGRAPH_H
|
|
|
|
#include "llvm/Analysis/DSNode.h"
|
|
|
|
namespace llvm {
|
|
|
|
class GlobalValue;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DSGraph - The graph that represents a function.
|
|
///
|
|
struct DSGraph {
|
|
// Public data-type declarations...
|
|
typedef hash_map<Value*, DSNodeHandle> ScalarMapTy;
|
|
typedef hash_map<Function*, DSNodeHandle> ReturnNodesTy;
|
|
typedef hash_set<const GlobalValue*> GlobalSetTy;
|
|
|
|
/// NodeMapTy - This data type is used when cloning one graph into another to
|
|
/// keep track of the correspondence between the nodes in the old and new
|
|
/// graphs.
|
|
typedef hash_map<const DSNode*, DSNodeHandle> NodeMapTy;
|
|
private:
|
|
DSGraph *GlobalsGraph; // Pointer to the common graph of global objects
|
|
bool PrintAuxCalls; // Should this graph print the Aux calls vector?
|
|
|
|
std::vector<DSNode*> Nodes;
|
|
ScalarMapTy ScalarMap;
|
|
|
|
// ReturnNodes - A return value for every function merged into this graph.
|
|
// Each DSGraph may have multiple functions merged into it at any time, which
|
|
// is used for representing SCCs.
|
|
//
|
|
ReturnNodesTy ReturnNodes;
|
|
|
|
// FunctionCalls - This vector maintains a single entry for each call
|
|
// instruction in the current graph. The first entry in the vector is the
|
|
// scalar that holds the return value for the call, the second is the function
|
|
// scalar being invoked, and the rest are pointer arguments to the function.
|
|
// This vector is built by the Local graph and is never modified after that.
|
|
//
|
|
std::vector<DSCallSite> FunctionCalls;
|
|
|
|
// AuxFunctionCalls - This vector contains call sites that have been processed
|
|
// by some mechanism. In pratice, the BU Analysis uses this vector to hold
|
|
// the _unresolved_ call sites, because it cannot modify FunctionCalls.
|
|
//
|
|
std::vector<DSCallSite> AuxFunctionCalls;
|
|
|
|
// InlinedGlobals - This set records which globals have been inlined from
|
|
// other graphs (callers or callees, depending on the pass) into this one.
|
|
//
|
|
GlobalSetTy InlinedGlobals;
|
|
|
|
/// TD - This is the target data object for the machine this graph is
|
|
/// constructed for.
|
|
const TargetData &TD;
|
|
|
|
void operator=(const DSGraph &); // DO NOT IMPLEMENT
|
|
|
|
public:
|
|
// Create a new, empty, DSGraph.
|
|
DSGraph(const TargetData &td)
|
|
: GlobalsGraph(0), PrintAuxCalls(false), TD(td) {}
|
|
|
|
// Compute the local DSGraph
|
|
DSGraph(const TargetData &td, Function &F, DSGraph *GlobalsGraph);
|
|
|
|
// Copy ctor - If you want to capture the node mapping between the source and
|
|
// destination graph, you may optionally do this by specifying a map to record
|
|
// this into.
|
|
//
|
|
// Note that a copied graph does not retain the GlobalsGraph pointer of the
|
|
// source. You need to set a new GlobalsGraph with the setGlobalsGraph
|
|
// method.
|
|
//
|
|
DSGraph(const DSGraph &DSG);
|
|
DSGraph(const DSGraph &DSG, NodeMapTy &NodeMap);
|
|
~DSGraph();
|
|
|
|
DSGraph *getGlobalsGraph() const { return GlobalsGraph; }
|
|
void setGlobalsGraph(DSGraph *G) { GlobalsGraph = G; }
|
|
|
|
/// getTargetData - Return the TargetData object for the current target.
|
|
///
|
|
const TargetData &getTargetData() const { return TD; }
|
|
|
|
/// setPrintAuxCalls - If you call this method, the auxillary call vector will
|
|
/// be printed instead of the standard call vector to the dot file.
|
|
///
|
|
void setPrintAuxCalls() { PrintAuxCalls = true; }
|
|
bool shouldPrintAuxCalls() const { return PrintAuxCalls; }
|
|
|
|
/// getNodes - Get a vector of all the nodes in the graph
|
|
///
|
|
const std::vector<DSNode*> &getNodes() const { return Nodes; }
|
|
std::vector<DSNode*> &getNodes() { return Nodes; }
|
|
|
|
/// getFunctionNames - Return a space separated list of the name of the
|
|
/// functions in this graph (if any)
|
|
std::string getFunctionNames() const;
|
|
|
|
/// addNode - Add a new node to the graph.
|
|
///
|
|
void addNode(DSNode *N) { Nodes.push_back(N); }
|
|
|
|
/// getScalarMap - Get a map that describes what the nodes the scalars in this
|
|
/// function point to...
|
|
///
|
|
ScalarMapTy &getScalarMap() { return ScalarMap; }
|
|
const ScalarMapTy &getScalarMap() const { return ScalarMap; }
|
|
|
|
/// getFunctionCalls - Return the list of call sites in the original local
|
|
/// graph...
|
|
///
|
|
const std::vector<DSCallSite> &getFunctionCalls() const {
|
|
return FunctionCalls;
|
|
}
|
|
|
|
/// getAuxFunctionCalls - Get the call sites as modified by whatever passes
|
|
/// have been run.
|
|
///
|
|
std::vector<DSCallSite> &getAuxFunctionCalls() {
|
|
return AuxFunctionCalls;
|
|
}
|
|
const std::vector<DSCallSite> &getAuxFunctionCalls() const {
|
|
return AuxFunctionCalls;
|
|
}
|
|
|
|
/// getInlinedGlobals - Get the set of globals that are have been inlined
|
|
/// (from callees in BU or from callers in TD) into the current graph.
|
|
///
|
|
GlobalSetTy& getInlinedGlobals() {
|
|
return InlinedGlobals;
|
|
}
|
|
|
|
/// getNodeForValue - Given a value that is used or defined in the body of the
|
|
/// current function, return the DSNode that it points to.
|
|
///
|
|
DSNodeHandle &getNodeForValue(Value *V) { return ScalarMap[V]; }
|
|
|
|
const DSNodeHandle &getNodeForValue(Value *V) const {
|
|
ScalarMapTy::const_iterator I = ScalarMap.find(V);
|
|
assert(I != ScalarMap.end() &&
|
|
"Use non-const lookup function if node may not be in the map");
|
|
return I->second;
|
|
}
|
|
|
|
/// getReturnNodes - Return the mapping of functions to their return nodes for
|
|
/// this graph.
|
|
const ReturnNodesTy &getReturnNodes() const { return ReturnNodes; }
|
|
ReturnNodesTy &getReturnNodes() { return ReturnNodes; }
|
|
|
|
/// getReturnNodeFor - Return the return node for the specified function.
|
|
///
|
|
DSNodeHandle &getReturnNodeFor(Function &F) {
|
|
ReturnNodesTy::iterator I = ReturnNodes.find(&F);
|
|
assert(I != ReturnNodes.end() && "F not in this DSGraph!");
|
|
return I->second;
|
|
}
|
|
|
|
const DSNodeHandle &getReturnNodeFor(Function &F) const {
|
|
ReturnNodesTy::const_iterator I = ReturnNodes.find(&F);
|
|
assert(I != ReturnNodes.end() && "F not in this DSGraph!");
|
|
return I->second;
|
|
}
|
|
|
|
/// getGraphSize - Return the number of nodes in this graph.
|
|
///
|
|
unsigned getGraphSize() const {
|
|
return Nodes.size();
|
|
}
|
|
|
|
/// print - Print a dot graph to the specified ostream...
|
|
///
|
|
void print(std::ostream &O) const;
|
|
|
|
/// dump - call print(std::cerr), for use from the debugger...
|
|
///
|
|
void dump() const;
|
|
|
|
/// viewGraph - Emit a dot graph, run 'dot', run gv on the postscript file,
|
|
/// then cleanup. For use from the debugger.
|
|
void viewGraph() const;
|
|
|
|
void writeGraphToFile(std::ostream &O, const std::string &GraphName) const;
|
|
|
|
/// maskNodeTypes - Apply a mask to all of the node types in the graph. This
|
|
/// is useful for clearing out markers like Incomplete.
|
|
///
|
|
void maskNodeTypes(unsigned Mask) {
|
|
for (unsigned i = 0, e = Nodes.size(); i != e; ++i)
|
|
Nodes[i]->maskNodeTypes(Mask);
|
|
}
|
|
void maskIncompleteMarkers() { maskNodeTypes(~DSNode::Incomplete); }
|
|
|
|
// markIncompleteNodes - Traverse the graph, identifying nodes that may be
|
|
// modified by other functions that have not been resolved yet. This marks
|
|
// nodes that are reachable through three sources of "unknownness":
|
|
// Global Variables, Function Calls, and Incoming Arguments
|
|
//
|
|
// For any node that may have unknown components (because something outside
|
|
// the scope of current analysis may have modified it), the 'Incomplete' flag
|
|
// is added to the NodeType.
|
|
//
|
|
enum MarkIncompleteFlags {
|
|
MarkFormalArgs = 1, IgnoreFormalArgs = 0,
|
|
IgnoreGlobals = 2, MarkGlobalsIncomplete = 0,
|
|
};
|
|
void markIncompleteNodes(unsigned Flags);
|
|
|
|
// removeDeadNodes - Use a reachability analysis to eliminate subgraphs that
|
|
// are unreachable. This often occurs because the data structure doesn't
|
|
// "escape" into it's caller, and thus should be eliminated from the caller's
|
|
// graph entirely. This is only appropriate to use when inlining graphs.
|
|
//
|
|
enum RemoveDeadNodesFlags {
|
|
RemoveUnreachableGlobals = 1, KeepUnreachableGlobals = 0,
|
|
};
|
|
void removeDeadNodes(unsigned Flags);
|
|
|
|
/// CloneFlags enum - Bits that may be passed into the cloneInto method to
|
|
/// specify how to clone the function graph.
|
|
enum CloneFlags {
|
|
StripAllocaBit = 1 << 0, KeepAllocaBit = 0,
|
|
DontCloneCallNodes = 1 << 1, CloneCallNodes = 0,
|
|
DontCloneAuxCallNodes = 1 << 2, CloneAuxCallNodes = 0,
|
|
StripModRefBits = 1 << 3, KeepModRefBits = 0,
|
|
StripIncompleteBit = 1 << 4, KeepIncompleteBit = 0,
|
|
};
|
|
|
|
private:
|
|
void cloneReachableNodes(const DSNode* Node,
|
|
unsigned BitsToClear,
|
|
NodeMapTy& OldNodeMap,
|
|
NodeMapTy& CompletedNodeMap);
|
|
|
|
public:
|
|
void updateFromGlobalGraph();
|
|
|
|
void cloneReachableSubgraph(const DSGraph& G,
|
|
const hash_set<const DSNode*>& RootNodes,
|
|
NodeMapTy& OldNodeMap,
|
|
NodeMapTy& CompletedNodeMap,
|
|
unsigned CloneFlags = 0);
|
|
|
|
|
|
/// computeNodeMapping - Given roots in two different DSGraphs, traverse the
|
|
/// nodes reachable from the two graphs, computing the mapping of nodes from
|
|
/// the first to the second graph.
|
|
///
|
|
static void computeNodeMapping(const DSNodeHandle &NH1,
|
|
const DSNodeHandle &NH2, NodeMapTy &NodeMap,
|
|
bool StrictChecking = true);
|
|
|
|
|
|
/// cloneInto - Clone the specified DSGraph into the current graph. The
|
|
/// translated ScalarMap for the old function is filled into the OldValMap
|
|
/// member, and the translated ReturnNodes map is returned into ReturnNodes.
|
|
///
|
|
/// The CloneFlags member controls various aspects of the cloning process.
|
|
///
|
|
void cloneInto(const DSGraph &G, ScalarMapTy &OldValMap,
|
|
ReturnNodesTy &OldReturnNodes, NodeMapTy &OldNodeMap,
|
|
unsigned CloneFlags = 0);
|
|
|
|
/// mergeInGraph - The method is used for merging graphs together. If the
|
|
/// argument graph is not *this, it makes a clone of the specified graph, then
|
|
/// merges the nodes specified in the call site with the formal arguments in
|
|
/// the graph. If the StripAlloca's argument is 'StripAllocaBit' then Alloca
|
|
/// markers are removed from nodes.
|
|
///
|
|
void mergeInGraph(const DSCallSite &CS, Function &F, const DSGraph &Graph,
|
|
unsigned CloneFlags);
|
|
|
|
|
|
/// getCallSiteForArguments - Get the arguments and return value bindings for
|
|
/// the specified function in the current graph.
|
|
///
|
|
DSCallSite getCallSiteForArguments(Function &F) const;
|
|
|
|
// Methods for checking to make sure graphs are well formed...
|
|
void AssertNodeInGraph(const DSNode *N) const {
|
|
assert((!N || find(Nodes.begin(), Nodes.end(), N) != Nodes.end()) &&
|
|
"AssertNodeInGraph: Node is not in graph!");
|
|
}
|
|
void AssertNodeContainsGlobal(const DSNode *N, GlobalValue *GV) const {
|
|
assert(std::find(N->getGlobals().begin(), N->getGlobals().end(), GV) !=
|
|
N->getGlobals().end() && "Global value not in node!");
|
|
}
|
|
|
|
void AssertCallSiteInGraph(const DSCallSite &CS) const {
|
|
if (CS.isIndirectCall())
|
|
AssertNodeInGraph(CS.getCalleeNode());
|
|
AssertNodeInGraph(CS.getRetVal().getNode());
|
|
for (unsigned j = 0, e = CS.getNumPtrArgs(); j != e; ++j)
|
|
AssertNodeInGraph(CS.getPtrArg(j).getNode());
|
|
}
|
|
|
|
void AssertCallNodesInGraph() const {
|
|
for (unsigned i = 0, e = FunctionCalls.size(); i != e; ++i)
|
|
AssertCallSiteInGraph(FunctionCalls[i]);
|
|
}
|
|
void AssertAuxCallNodesInGraph() const {
|
|
for (unsigned i = 0, e = AuxFunctionCalls.size(); i != e; ++i)
|
|
AssertCallSiteInGraph(AuxFunctionCalls[i]);
|
|
}
|
|
|
|
void AssertGraphOK() const;
|
|
|
|
/// mergeInGlobalsGraph - This method is useful for clients to incorporate the
|
|
/// globals graph into the DS, BU or TD graph for a function. This code
|
|
/// retains all globals, i.e., does not delete unreachable globals after they
|
|
/// are inlined.
|
|
///
|
|
void mergeInGlobalsGraph();
|
|
|
|
/// removeTriviallyDeadNodes - After the graph has been constructed, this
|
|
/// method removes all unreachable nodes that are created because they got
|
|
/// merged with other nodes in the graph. This is used as the first step of
|
|
/// removeDeadNodes.
|
|
///
|
|
void removeTriviallyDeadNodes();
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|