checkpoint of the new PHITransAddr code, still not done and not used by

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

diff --git a/include/llvm/Analysis/LoopDependenceAnalysis.h b/include/llvm/Analysis/LoopDependenceAnalysis.h
index 56a6b6eb06169a977ff0421200aed3ea075dd23f..a1a563796f5a0ad8f91248acab31f603f90c5f7a 100644 (file)
--- a/include/llvm/Analysis/LoopDependenceAnalysis.h
+++ b/include/llvm/Analysis/LoopDependenceAnalysis.h
@@ -20,11 +20,11 @@
 #ifndef LLVM_ANALYSIS_LOOP_DEPENDENCE_ANALYSIS_H
 #define LLVM_ANALYSIS_LOOP_DEPENDENCE_ANALYSIS_H
 
+#include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Analysis/LoopPass.h"
 #include "llvm/Support/Allocator.h"
-#include <iosfwd>
 
 namespace llvm {
 
@@ -67,7 +67,25 @@ class LoopDependenceAnalysis : public LoopPass {
   /// created. The third argument is set to the pair found or created.
   bool findOrInsertDependencePair(Value*, Value*, DependencePair*&);
 
+  /// getLoops - Collect all loops of the loop nest L in which
+  /// a given SCEV is variant.
+  void getLoops(const SCEV*, DenseSet<const Loop*>*) const;
+
+  /// isLoopInvariant - True if a given SCEV is invariant in all loops of the
+  /// loop nest starting at the innermost loop L.
+  bool isLoopInvariant(const SCEV*) const;
+
+  /// isAffine - An SCEV is affine with respect to the loop nest starting at
+  /// the innermost loop L if it is of the form A+B*X where A, B are invariant
+  /// in the loop nest and X is a induction variable in the loop nest.
+  bool isAffine(const SCEV*) const;
+
   /// TODO: doc
+  bool isZIVPair(const SCEV*, const SCEV*) const;
+  bool isSIVPair(const SCEV*, const SCEV*) const;
+  DependenceResult analyseZIV(const SCEV*, const SCEV*, Subscript*) const;
+  DependenceResult analyseSIV(const SCEV*, const SCEV*, Subscript*) const;
+  DependenceResult analyseMIV(const SCEV*, const SCEV*, Subscript*) const;
   DependenceResult analyseSubscript(const SCEV*, const SCEV*, Subscript*) const;
   DependenceResult analysePair(DependencePair*) const;
 
@@ -75,8 +93,8 @@ public:
   static char ID; // Class identification, replacement for typeinfo
   LoopDependenceAnalysis() : LoopPass(&ID) {}
 
-  /// isDependencePair - Check wether two values can possibly give rise to a
-  /// data dependence: that is the case if both are instructions accessing
+  /// isDependencePair - Check whether two values can possibly give rise to
+  /// a data dependence: that is the case if both are instructions accessing
   /// memory and at least one of those accesses is a write.
   bool isDependencePair(const Value*, const Value*) const;
 
@@ -88,7 +106,6 @@ public:
   virtual void releaseMemory();
   virtual void getAnalysisUsage(AnalysisUsage&) const;
   void print(raw_ostream&, const Module* = 0) const;
-  virtual void print(std::ostream&, const Module* = 0) const;
 
 private:
   FoldingSet<DependencePair> Pairs;