//===- 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
#define LLVM_CALL_GRAPH_SCC_PASS_H
#include "llvm/Pass.h"
+#include "llvm/Analysis/CallGraph.h"
+
+namespace llvm {
class CallGraphNode;
+class CallGraph;
+class PMStack;
struct CallGraphSCCPass : public Pass {
+ explicit CallGraphSCCPass(intptr_t pid) : Pass(PT_CallGraphSCC, pid) {}
+ explicit CallGraphSCCPass(void *pid) : Pass(PT_CallGraphSCC, 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;
-
- /// run - Run this pass, returning true if a modification was made to the
- /// module argument. This is implemented in terms of the runOnSCC method.
+ /// SCC passes that add or delete functions to the SCC are required to update
+ /// the SCC list, otherwise stale pointers may be dereferenced.
///
- virtual bool run(Module &M);
+ virtual bool runOnSCC(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
virtual void getAnalysisUsage(AnalysisUsage &Info) const;
};
+} // End llvm namespace
+
#endif