[PM/AA] Run clang-format over the SCEV-AA code to normalize the

[oota-llvm.git] / include / llvm / Analysis / LazyValueInfo.h

diff --git a/include/llvm/Analysis/LazyValueInfo.h b/include/llvm/Analysis/LazyValueInfo.h
index 29f81809594ce2605a3fbf1048e07bd4f4cdca91..42002062dca21b0d9667428a9a5c1458199cc430 100644 (file)
--- a/include/llvm/Analysis/LazyValueInfo.h
+++ b/include/llvm/Analysis/LazyValueInfo.h
@@ -12,29 +12,76 @@
 //
 //===----------------------------------------------------------------------===//
 
-#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 AssumptionCache;
+  class Constant;
+  class DataLayout;
+  class DominatorTree;
+  class Instruction;
+  class TargetLibraryInfo;
+  class Value;
 
-/// LazyValueInfo - This pass computes, caches, and vends lazy value constraint
-/// information.
+/// This pass computes, caches, and vends lazy value constraint information.
 class LazyValueInfo : public FunctionPass {
+  AssumptionCache *AC;
+  class TargetLibraryInfo *TLI;
+  DominatorTree *DT;
+  void *PImpl;
+  LazyValueInfo(const LazyValueInfo&) = delete;
+  void operator=(const LazyValueInfo&) = delete;
 public:
   static char ID;
-  LazyValueInfo();
-
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-    AU.setPreservesAll();
-  }
-  virtual void releaseMemory();
-  
-  virtual bool runOnFunction(Function &F) {
-    // Fully lazy.
-    return false;
+  LazyValueInfo() : FunctionPass(ID), PImpl(nullptr) {
+    initializeLazyValueInfoPass(*PassRegistry::getPassRegistry());
   }
+  ~LazyValueInfo() override { assert(!PImpl && "releaseMemory not called"); }
+
+  /// This is used to return true/false/dunno results.
+  enum Tristate {
+    Unknown = -1, False = 0, True = 1
+  };
+
+  // Public query interface.
+
+  /// 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,
+                              Instruction *CxtI = nullptr);
+
+  /// Determine whether the specified value comparison with a constant is known
+  /// to be true or false at the specified instruction
+  /// (from an assume intrinsic). Pred is a CmpInst predicate.
+  Tristate getPredicateAt(unsigned Pred, Value *V, Constant *C,
+                          Instruction *CxtI);
+
+  /// 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, Instruction *CxtI = nullptr);
+
+  /// 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,
+                              Instruction *CxtI = nullptr);
+
+  /// 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);
+
+  /// Inform the analysis cache that we have erased a block.
+  void eraseBlock(BasicBlock *BB);
+
+  // Implementation boilerplate.
+
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+  void releaseMemory() override;
+  bool runOnFunction(Function &F) override;
 };
 
 }  // end namespace llvm