#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallPtrSet.h"
-#include <iosfwd>
#include <vector>
#include <set>
class BasicBlock;
class Function;
class SparseSolver;
+ class raw_ostream;
template<typename T> class SmallVectorImpl;
virtual LatticeVal ComputeConstant(Constant *C) {
return getOverdefinedVal(); // always safe
}
+
+ /// IsSpecialCasedPHI - Given a PHI node, determine whether this PHI node is
+ /// one that the we want to handle through ComputeInstructionState.
+ virtual bool IsSpecialCasedPHI(PHINode *PN) {
+ return false;
+ }
/// GetConstant - If the specified lattice value is representable as an LLVM
/// constant value, return it. Otherwise return null. The returned value
}
/// PrintValue - Render the specified lattice value to the specified stream.
- virtual void PrintValue(LatticeVal V, std::ostream &OS);
+ virtual void PrintValue(LatticeVal V, raw_ostream &OS);
};
///
void Solve(Function &F);
- void Print(Function &F, std::ostream &OS);
+ void Print(Function &F, raw_ostream &OS) const;
/// getLatticeState - Return the LatticeVal object that corresponds to the
/// value. If an value is not in the map, it is returned as untracked,
/// unlike the getOrInitValueState method.
LatticeVal getLatticeState(Value *V) const {
- DenseMap<Value*, LatticeVal>::iterator I = ValueState.find(V);
+ DenseMap<Value*, LatticeVal>::const_iterator I = ValueState.find(V);
return I != ValueState.end() ? I->second : LatticeFunc->getUntrackedVal();
}
/// lattice, not when querying it.
bool isEdgeFeasible(BasicBlock *From, BasicBlock *To,
bool AggressiveUndef = false);
+
+ /// isBlockExecutable - Return true if there are any known feasible
+ /// edges into the basic block. This is generally only useful when
+ /// querying the lattice.
+ bool isBlockExecutable(BasicBlock *BB) const {
+ return BBExecutable.count(BB);
+ }
private:
/// UpdateState - When the state for some instruction is potentially updated,