mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
033a7d5389
a DSGraph at a time instead of a function at a time. This is also more correct, though it doesn't seem to fix any programs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17435 91177308-0d34-0410-b5e6-96231b3b80d8
107 lines
3.7 KiB
C++
107 lines
3.7 KiB
C++
//===-- EquivClassGraphs.h - Merge equiv-class graphs -----------*- 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 pass is the same as the complete bottom-up graphs, but with functions
|
|
// partitioned into equivalence classes and a single merged DS graph for all
|
|
// functions in an equivalence class. After this merging, graphs are inlined
|
|
// bottom-up on the SCCs of the final (CBU) call graph.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/DataStructure/DataStructure.h"
|
|
#include "llvm/Analysis/DataStructure/DSGraph.h"
|
|
#include "llvm/ADT/EquivalenceClasses.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include <vector>
|
|
#include <map>
|
|
#include <ext/hash_map>
|
|
|
|
namespace llvm {
|
|
|
|
class Module;
|
|
class Function;
|
|
|
|
namespace PA {
|
|
/// EquivClassGraphs - This is the same as the complete bottom-up graphs, but
|
|
/// with functions partitioned into equivalence classes and a single merged
|
|
/// DS graph for all functions in an equivalence class. After this merging,
|
|
/// graphs are inlined bottom-up on the SCCs of the final (CBU) call graph.
|
|
///
|
|
struct EquivClassGraphs : public ModulePass {
|
|
CompleteBUDataStructures *CBU;
|
|
|
|
DSGraph *GlobalsGraph;
|
|
|
|
// DSInfo - one graph for each function.
|
|
hash_map<const Function*, DSGraph*> DSInfo;
|
|
|
|
/// ActualCallees - The actual functions callable from indirect call sites.
|
|
///
|
|
hash_multimap<Instruction*, Function*> ActualCallees;
|
|
|
|
// Equivalence class where functions that can potentially be called via the
|
|
// same function pointer are in the same class.
|
|
EquivalenceClasses<Function*> FuncECs;
|
|
|
|
/// OneCalledFunction - For each indirect call, we keep track of one
|
|
/// target of the call. This is used to find equivalence class called by
|
|
/// a call site.
|
|
std::map<DSNode*, Function *> OneCalledFunction;
|
|
|
|
public:
|
|
/// EquivClassGraphs - Computes the equivalence classes and then the
|
|
/// folded DS graphs for each class.
|
|
///
|
|
virtual bool runOnModule(Module &M);
|
|
|
|
/// getDSGraph - Return the data structure graph for the specified function.
|
|
/// This returns the folded graph. The folded graph is the same as the CBU
|
|
/// graph iff the function is in a singleton equivalence class AND all its
|
|
/// callees also have the same folded graph as the CBU graph.
|
|
///
|
|
DSGraph &getDSGraph(const Function &F) const {
|
|
hash_map<const Function*, DSGraph*>::const_iterator I = DSInfo.find(&F);
|
|
assert(I != DSInfo.end() && "No graph computed for that function!");
|
|
return *I->second;
|
|
}
|
|
|
|
/// getSomeCalleeForCallSite - Return any one callee function at
|
|
/// a call site.
|
|
///
|
|
Function *getSomeCalleeForCallSite(const CallSite &CS) const;
|
|
|
|
DSGraph &getGlobalsGraph() const {
|
|
return *GlobalsGraph;
|
|
}
|
|
|
|
typedef hash_multimap<Instruction*, Function*> ActualCalleesTy;
|
|
const ActualCalleesTy &getActualCallees() const {
|
|
return ActualCallees;
|
|
}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
AU.addRequired<CompleteBUDataStructures>();
|
|
}
|
|
|
|
private:
|
|
void buildIndirectFunctionSets(Module &M);
|
|
|
|
unsigned processSCC(DSGraph &FG, std::vector<DSGraph*> &Stack,
|
|
unsigned &NextID,
|
|
std::map<DSGraph*, unsigned> &ValMap);
|
|
void processGraph(DSGraph &FG);
|
|
|
|
DSGraph &getOrCreateGraph(Function &F);
|
|
};
|
|
|
|
}; // end PA namespace
|
|
|
|
}; // end llvm namespace
|