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//===-- UnifyFunctionExitNodes.h - Ensure fn's have one return ---*- C++ -*--=//
//
// This pass is used to ensure that functions have at most one return
// instruction in them. Additionally, it keeps track of which node is the new
// exit node of the CFG. If there are no exit nodes in the CFG, the getExitNode
// method will return a null pointer.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TRANSFORMS_UNIFYFUNCTIONEXITNODES_H
#define LLVM_TRANSFORMS_UNIFYFUNCTIONEXITNODES_H
#include "llvm/Pass.h"
struct UnifyFunctionExitNodes : public FunctionPass {
BasicBlock *ExitNode;
public:
UnifyFunctionExitNodes() : ExitNode(0) {}
// We can preserve non-critical-edgeness when we unify function exit nodes
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
// getExitNode - Return the new single (or nonexistant) exit node of the CFG.
//
BasicBlock *getExitNode() const { return ExitNode; }
virtual bool runOnFunction(Function &F);
};
static inline Pass *createUnifyFunctionExitNodesPass() {
return new UnifyFunctionExitNodes();
}
#endif
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