mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 19:52:54 +01:00
73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
//===- CallGraphSCCPass.h - Pass that operates BU on call graph -*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the CallGraphSCCPass class, which is used for passes which
|
|
// are implemented as bottom-up traversals on the call graph. Because there may
|
|
// be cycles in the call graph, passes of this type operate on the call-graph in
|
|
// SCC order: that is, they process function bottom-up, except for recursive
|
|
// functions, which they process all at once.
|
|
//
|
|
// These passes are inherently interprocedural, and are required to keep the
|
|
// call graph up-to-date if they do anything which could modify it.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CALL_GRAPH_SCC_PASS_H
|
|
#define LLVM_CALL_GRAPH_SCC_PASS_H
|
|
|
|
#include "llvm/Pass.h"
|
|
|
|
namespace llvm {
|
|
|
|
class CallGraphNode;
|
|
class CallGraph;
|
|
class PMStack;
|
|
|
|
struct CallGraphSCCPass : public Pass {
|
|
|
|
explicit CallGraphSCCPass(intptr_t pid) : Pass(pid) {}
|
|
|
|
/// doInitialization - This method is called before the SCC's of the program
|
|
/// has been processed, allowing the pass to do initialization as necessary.
|
|
virtual bool doInitialization(CallGraph &CG) {
|
|
return false;
|
|
}
|
|
|
|
/// runOnSCC - This method should be implemented by the subclass to perform
|
|
/// whatever action is necessary for the specified SCC. Note that
|
|
/// non-recursive (or only self-recursive) functions will have an SCC size of
|
|
/// 1, where recursive portions of the call graph will have SCC size > 1.
|
|
///
|
|
virtual bool runOnSCC(const std::vector<CallGraphNode *> &SCC) = 0;
|
|
|
|
/// doFinalization - This method is called after the SCC's of the program has
|
|
/// been processed, allowing the pass to do final cleanup as necessary.
|
|
virtual bool doFinalization(CallGraph &CG) {
|
|
return false;
|
|
}
|
|
|
|
/// Assign pass manager to manager this pass
|
|
virtual void assignPassManager(PMStack &PMS,
|
|
PassManagerType PMT = PMT_CallGraphPassManager);
|
|
|
|
/// Return what kind of Pass Manager can manage this pass.
|
|
virtual PassManagerType getPotentialPassManagerType() const {
|
|
return PMT_CallGraphPassManager;
|
|
}
|
|
|
|
/// getAnalysisUsage - For this class, we declare that we require and preserve
|
|
/// the call graph. If the derived class implements this method, it should
|
|
/// always explicitly call the implementation here.
|
|
virtual void getAnalysisUsage(AnalysisUsage &Info) const;
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|