/// DSGraph - The graph that represents a function.
///
class DSGraph {
- Function *Func;
+ Function *Func; // Func - The LLVM function this graph corresponds to
+ DSGraph *GlobalsGraph; // Pointer to the common graph of global objects
+ bool PrintAuxCalls; // Should this graph print the Aux calls vector?
+
+ DSNodeHandle RetNode; // The node that gets returned...
std::vector<DSNode*> Nodes;
- DSNodeHandle RetNode; // Node that gets returned...
- std::map<Value*, DSNodeHandle> ValueMap;
-
-#if 0
- // GlobalsGraph -- Reference to the common graph of globally visible objects.
- // This includes GlobalValues, New nodes, Cast nodes, and Calls.
- //
- GlobalDSGraph* GlobalsGraph;
-#endif
+ hash_map<Value*, DSNodeHandle> ScalarMap;
// FunctionCalls - This vector maintains a single entry for each call
- // instruction in the current graph. Each call entry contains DSNodeHandles
- // that refer to the arguments that are passed into the function call. 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.
+ // 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;
+
void operator=(const DSGraph &); // DO NOT IMPLEMENT
public:
- DSGraph() : Func(0) {} // Create a new, empty, DSGraph.
- DSGraph(Function &F); // Compute the local DSGraph
+ // Create a new, empty, DSGraph.
+ DSGraph() : Func(0), GlobalsGraph(0), PrintAuxCalls(false) {}
+ DSGraph(Function &F, DSGraph *GlobalsGraph); // Compute the local DSGraph
// 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, std::map<const DSNode*, DSNode*> &BUNodeMap);
+ DSGraph(const DSGraph &DSG, hash_map<const DSNode*, DSNodeHandle> &NodeMap);
~DSGraph();
bool hasFunction() const { return Func != 0; }
- Function &getFunction() const { return *Func; }
+ Function &getFunction() const {
+ assert(hasFunction() && "Cannot call getFunction on graph without a fn!");
+ return *Func;
+ }
+
+ DSGraph *getGlobalsGraph() const { return GlobalsGraph; }
+ void setGlobalsGraph(DSGraph *G) { GlobalsGraph = G; }
+
+ // 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
///
///
void addNode(DSNode *N) { Nodes.push_back(N); }
- /// getValueMap - Get a map that describes what the nodes the scalars in this
+ /// getScalarMap - Get a map that describes what the nodes the scalars in this
/// function point to...
///
- std::map<Value*, DSNodeHandle> &getValueMap() { return ValueMap; }
- const std::map<Value*, DSNodeHandle> &getValueMap() const { return ValueMap;}
+ hash_map<Value*, DSNodeHandle> &getScalarMap() { return ScalarMap; }
+ const hash_map<Value*, DSNodeHandle> &getScalarMap() const {return ScalarMap;}
- std::vector<DSCallSite> &getFunctionCalls() {
- return FunctionCalls;
- }
+ /// 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;
+ }
+
/// 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 ValueMap[V]; }
+ DSNodeHandle &getNodeForValue(Value *V) { return ScalarMap[V]; }
+
+ const DSNodeHandle &getNodeForValue(Value *V) const {
+ hash_map<Value*, DSNodeHandle>::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;
+ }
const DSNodeHandle &getRetNode() const { return RetNode; }
DSNodeHandle &getRetNode() { return RetNode; }
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 Scalar or Incomplete.
- //
- void maskNodeTypes(unsigned char Mask);
+ /// 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
// the scope of current analysis may have modified it), the 'Incomplete' flag
// is added to the NodeType.
//
- void markIncompleteNodes(bool markFormalArgs = true);
-
- // 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.
+ 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.
//
- void removeTriviallyDeadNodes(bool KeepAllGlobals = false);
-
- // removeDeadNodes - Use a more powerful 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.
- //
- void removeDeadNodes(bool KeepAllGlobals = false, bool KeepCalls = true);
+ 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 << 0,
+ DontCloneCallNodes = 1 << 1, CloneCallNodes = 0 << 0,
+ DontCloneAuxCallNodes = 1 << 2, CloneAuxCallNodes = 0 << 0,
+ StripModRefBits = 1 << 3, KeepModRefBits = 0 << 0,
+ };
// cloneInto - Clone the specified DSGraph into the current graph, returning
- // the Return node of the graph. The translated ValueMap for the old function
- // is filled into the OldValMap member.
- // If StripScalars (StripAllocas) is set to true, Scalar (Alloca) markers
- // are removed from the graph as the graph is being cloned.
+ // the Return node of the graph. The translated ScalarMap for the old
+ // function is filled into the OldValMap member. If StripAllocas is set to
+ // 'StripAllocaBit', Alloca markers are removed from the graph as the graph is
+ // being cloned.
//
DSNodeHandle cloneInto(const DSGraph &G,
- std::map<Value*, DSNodeHandle> &OldValMap,
- std::map<const DSNode*, DSNode*> &OldNodeMap,
- bool StripScalars = false, bool StripAllocas = false);
-
-#if 0
- // cloneGlobalInto - Clone the given global node (or the node for the given
- // GlobalValue) from the GlobalsGraph and all its target links (recursively).
- //
- DSNode* cloneGlobalInto(const DSNode* GNode);
- DSNode* cloneGlobalInto(GlobalValue* GV) {
- assert(!GV || (((DSGraph*) GlobalsGraph)->ValueMap[GV] != 0));
- return GV? cloneGlobalInto(((DSGraph*) GlobalsGraph)->ValueMap[GV]) : 0;
+ hash_map<Value*, DSNodeHandle> &OldValMap,
+ hash_map<const DSNode*, DSNodeHandle> &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(DSCallSite &CS, const DSGraph &Graph, unsigned CloneFlags);
+
+ // 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]);
}
-#endif
-private:
- bool isNodeDead(DSNode *N);
+ void AssertGraphOK() const;
+
+public:
+ // 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();
};
#endif
projects / oota-llvm.git / blobdiff