llvm-6502/include/llvm/Analysis/DataStructure.h
2003-02-03 22:51:28 +00:00

176 lines
5.4 KiB
C++

//===- DataStructure.h - Build data structure graphs ------------*- C++ -*-===//
//
// Implement the LLVM data structure analysis library.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_DATA_STRUCTURE_H
#define LLVM_ANALYSIS_DATA_STRUCTURE_H
#include "llvm/Pass.h"
#include "Support/HashExtras.h"
#include "Support/hash_set"
class Type;
class DSGraph;
class DSNode;
class DSCallSite;
// FIXME: move this stuff to a private header
namespace DataStructureAnalysis {
// isPointerType - Return true if this first class type is big enough to hold
// a pointer.
//
bool isPointerType(const Type *Ty);
}
// LocalDataStructures - The analysis that computes the local data structure
// graphs for all of the functions in the program.
//
// FIXME: This should be a Function pass that can be USED by a Pass, and would
// be automatically preserved. Until we can do that, this is a Pass.
//
class LocalDataStructures : public Pass {
// DSInfo, one graph for each function
hash_map<const Function*, DSGraph*> DSInfo;
DSGraph *GlobalsGraph;
public:
~LocalDataStructures() { releaseMemory(); }
virtual bool run(Module &M);
bool hasGraph(const Function &F) const {
return DSInfo.find(&F) != DSInfo.end();
}
// getDSGraph - Return the data structure graph for the specified function.
DSGraph &getDSGraph(const Function &F) const {
hash_map<const Function*, DSGraph*>::const_iterator I = DSInfo.find(&F);
assert(I != DSInfo.end() && "Function not in module!");
return *I->second;
}
DSGraph &getGlobalsGraph() const { return *GlobalsGraph; }
// print - Print out the analysis results...
void print(std::ostream &O, const Module *M) const;
// If the pass pipeline is done with this pass, we can release our memory...
virtual void releaseMemory();
// getAnalysisUsage - This obviously provides a data structure graph.
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
// BUDataStructures - The analysis that computes the interprocedurally closed
// data structure graphs for all of the functions in the program. This pass
// only performs a "Bottom Up" propagation (hence the name).
//
class BUDataStructures : public Pass {
// DSInfo, one graph for each function
hash_map<const Function*, DSGraph*> DSInfo;
DSGraph *GlobalsGraph;
public:
~BUDataStructures() { releaseMemory(); }
virtual bool run(Module &M);
bool hasGraph(const Function &F) const {
return DSInfo.find(&F) != DSInfo.end();
}
// getDSGraph - Return the data structure graph for the specified function.
DSGraph &getDSGraph(const Function &F) const {
hash_map<const Function*, DSGraph*>::const_iterator I = DSInfo.find(&F);
assert(I != DSInfo.end() && "Function not in module!");
return *I->second;
}
DSGraph &getGlobalsGraph() const { return *GlobalsGraph; }
// print - Print out the analysis results...
void print(std::ostream &O, const Module *M) const;
// If the pass pipeline is done with this pass, we can release our memory...
virtual void releaseMemory();
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<LocalDataStructures>();
}
private:
DSGraph &calculateGraph(Function &F);
// inlineNonSCCGraphs - This method is almost like the other two calculate
// graph methods. This one is used to inline function graphs (from functions
// outside of the SCC) into functions in the SCC. It is not supposed to touch
// functions IN the SCC at all.
//
DSGraph &inlineNonSCCGraphs(Function &F,
hash_set<Function*> &SCCFunctions);
DSGraph &calculateSCCGraph(Function &F,
hash_set<Function*> &InlinedSCCFunctions);
void calculateReachableGraphs(Function *F);
DSGraph &getOrCreateGraph(Function *F);
unsigned calculateGraphs(Function *F, std::vector<Function*> &Stack,
unsigned &NextID,
hash_map<Function*, unsigned> &ValMap);
};
// TDDataStructures - Analysis that computes new data structure graphs
// for each function using the closed graphs for the callers computed
// by the bottom-up pass.
//
class TDDataStructures : public Pass {
// DSInfo, one graph for each function
hash_map<const Function*, DSGraph*> DSInfo;
hash_set<const Function*> GraphDone;
DSGraph *GlobalsGraph;
public:
~TDDataStructures() { releaseMyMemory(); }
virtual bool run(Module &M);
bool hasGraph(const Function &F) const {
return DSInfo.find(&F) != DSInfo.end();
}
// getDSGraph - Return the data structure graph for the specified function.
DSGraph &getDSGraph(const Function &F) const {
hash_map<const Function*, DSGraph*>::const_iterator I = DSInfo.find(&F);
assert(I != DSInfo.end() && "Function not in module!");
return *I->second;
}
DSGraph &getGlobalsGraph() const { return *GlobalsGraph; }
// print - Print out the analysis results...
void print(std::ostream &O, const Module *M) const;
// If the pass pipeline is done with this pass, we can release our memory...
virtual void releaseMyMemory();
// getAnalysisUsage - This obviously provides a data structure graph.
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<BUDataStructures>();
}
private:
void calculateGraph(Function &F);
DSGraph &getOrCreateDSGraph(Function &F);
void ResolveCallSite(DSGraph &Graph, const DSCallSite &CallSite);
};
#endif