//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_ANALYSIS_LIVEVALUES_H
-#define LLVM_ANALYSIS_LIVEVALUES_H
+#ifndef LLVM_ANALYSIS_LAZYVALUEINFO_H
+#define LLVM_ANALYSIS_LAZYVALUEINFO_H
#include "llvm/Pass.h"
namespace llvm {
class Constant;
- class TargetData;
+ class DataLayout;
+ class TargetLibraryInfo;
class Value;
/// LazyValueInfo - This pass computes, caches, and vends lazy value constraint
/// information.
class LazyValueInfo : public FunctionPass {
- class TargetData *TD;
+ class DataLayout *TD;
+ class TargetLibraryInfo *TLI;
void *PImpl;
+ LazyValueInfo(const LazyValueInfo&) LLVM_DELETED_FUNCTION;
+ void operator=(const LazyValueInfo&) LLVM_DELETED_FUNCTION;
public:
static char ID;
- LazyValueInfo() : FunctionPass(&ID), PImpl(0) {}
+ LazyValueInfo() : FunctionPass(ID), PImpl(0) {
+ initializeLazyValueInfoPass(*PassRegistry::getPassRegistry());
+ }
+ ~LazyValueInfo() { assert(PImpl == 0 && "releaseMemory not called"); }
- /// Tristate - This is used to return yes/no/dunno results.
+ /// Tristate - This is used to return true/false/dunno results.
enum Tristate {
- Unknown = -1, No = 0, Yes = 1
+ Unknown = -1, False = 0, True = 1
};
// Public query interface.
+ /// getPredicateOnEdge - Determine whether the specified value comparison
+ /// with a constant is known to be true or false on the specified CFG edge.
+ /// Pred is a CmpInst predicate.
+ Tristate getPredicateOnEdge(unsigned Pred, Value *V, Constant *C,
+ BasicBlock *FromBB, BasicBlock *ToBB);
+
- /// isEqual - Determine whether the specified value is known to be equal or
- /// not-equal to the specified constant at the end of the specified block.
- Tristate isEqual(Value *V, Constant *C, BasicBlock *BB);
-
/// getConstant - Determine whether the specified value is known to be a
/// constant at the end of the specified block. Return null if not.
Constant *getConstant(Value *V, BasicBlock *BB);
+
+ /// getConstantOnEdge - Determine whether the specified value is known to be a
+ /// constant on the specified edge. Return null if not.
+ Constant *getConstantOnEdge(Value *V, BasicBlock *FromBB, BasicBlock *ToBB);
+
+ /// threadEdge - Inform the analysis cache that we have threaded an edge from
+ /// PredBB to OldSucc to be from PredBB to NewSucc instead.
+ void threadEdge(BasicBlock *PredBB, BasicBlock *OldSucc, BasicBlock *NewSucc);
+ /// eraseBlock - Inform the analysis cache that we have erased a block.
+ void eraseBlock(BasicBlock *BB);
// Implementation boilerplate.
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.setPreservesAll();
- }
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const;
virtual void releaseMemory();
virtual bool runOnFunction(Function &F);
};