Resolve a terrible hack in tblgen: instead of hardcoding

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

diff --git a/include/llvm/Analysis/ScalarEvolutionExpressions.h b/include/llvm/Analysis/ScalarEvolutionExpressions.h
index 2e4fd7e2106c77ec35b3a81826facee279436f8c..4213a287011b56043549dbc6a7d2290351a27f5f 100644 (file)
--- a/include/llvm/Analysis/ScalarEvolutionExpressions.h
+++ b/include/llvm/Analysis/ScalarEvolutionExpressions.h
@@ -37,8 +37,8 @@ namespace llvm {
     friend class ScalarEvolution;
 
     ConstantInt *V;
-    SCEVConstant(const FoldingSetNodeIDRef ID, unsigned Num, ConstantInt *v)
-      : SCEV(ID, Num, scConstant), V(v) {}
+    SCEVConstant(const FoldingSetNodeIDRef ID, ConstantInt *v) :
+      SCEV(ID, scConstant), V(v) {}
   public:
     ConstantInt *getValue() const { return V; }
 
@@ -81,7 +81,7 @@ namespace llvm {
     const SCEV *Op;
     const Type *Ty;
 
-    SCEVCastExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVCastExpr(const FoldingSetNodeIDRef ID,
                  unsigned SCEVTy, const SCEV *op, const Type *ty);
 
   public:
@@ -120,7 +120,7 @@ namespace llvm {
   class SCEVTruncateExpr : public SCEVCastExpr {
     friend class ScalarEvolution;
 
-    SCEVTruncateExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVTruncateExpr(const FoldingSetNodeIDRef ID,
                      const SCEV *op, const Type *ty);
 
   public:
@@ -140,7 +140,7 @@ namespace llvm {
   class SCEVZeroExtendExpr : public SCEVCastExpr {
     friend class ScalarEvolution;
 
-    SCEVZeroExtendExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVZeroExtendExpr(const FoldingSetNodeIDRef ID,
                        const SCEV *op, const Type *ty);
 
   public:
@@ -160,7 +160,7 @@ namespace llvm {
   class SCEVSignExtendExpr : public SCEVCastExpr {
     friend class ScalarEvolution;
 
-    SCEVSignExtendExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVSignExtendExpr(const FoldingSetNodeIDRef ID,
                        const SCEV *op, const Type *ty);
 
   public:
@@ -187,9 +187,9 @@ namespace llvm {
     const SCEV *const *Operands;
     size_t NumOperands;
 
-    SCEVNAryExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVNAryExpr(const FoldingSetNodeIDRef ID,
                  enum SCEVTypes T, const SCEV *const *O, size_t N)
-      : SCEV(ID, Num, T), Operands(O), NumOperands(N) {}
+      : SCEV(ID, T), Operands(O), NumOperands(N) {}
 
   public:
     size_t getNumOperands() const { return NumOperands; }
@@ -202,33 +202,14 @@ namespace llvm {
     op_iterator op_begin() const { return Operands; }
     op_iterator op_end() const { return Operands + NumOperands; }
 
-    virtual bool isLoopInvariant(const Loop *L) const {
-      for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
-        if (!getOperand(i)->isLoopInvariant(L)) return false;
-      return true;
-    }
+    virtual bool isLoopInvariant(const Loop *L) const;
 
     // hasComputableLoopEvolution - N-ary expressions have computable loop
     // evolutions iff they have at least one operand that varies with the loop,
     // but that all varying operands are computable.
-    virtual bool hasComputableLoopEvolution(const Loop *L) const {
-      bool HasVarying = false;
-      for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
-        if (!getOperand(i)->isLoopInvariant(L)) {
-          if (getOperand(i)->hasComputableLoopEvolution(L))
-            HasVarying = true;
-          else
-            return false;
-        }
-      return HasVarying;
-    }
+    virtual bool hasComputableLoopEvolution(const Loop *L) const;
 
-    virtual bool hasOperand(const SCEV *O) const {
-      for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
-        if (O == getOperand(i) || getOperand(i)->hasOperand(O))
-          return true;
-      return false;
-    }
+    virtual bool hasOperand(const SCEV *O) const;
 
     bool dominates(BasicBlock *BB, DominatorTree *DT) const;
 
@@ -262,9 +243,9 @@ namespace llvm {
   ///
   class SCEVCommutativeExpr : public SCEVNAryExpr {
   protected:
-    SCEVCommutativeExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVCommutativeExpr(const FoldingSetNodeIDRef ID,
                         enum SCEVTypes T, const SCEV *const *O, size_t N)
-      : SCEVNAryExpr(ID, Num, T, O, N) {}
+      : SCEVNAryExpr(ID, T, O, N) {}
 
   public:
     virtual const char *getOperationStr() const = 0;
@@ -288,9 +269,9 @@ namespace llvm {
   class SCEVAddExpr : public SCEVCommutativeExpr {
     friend class ScalarEvolution;
 
-    SCEVAddExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVAddExpr(const FoldingSetNodeIDRef ID,
                 const SCEV *const *O, size_t N)
-      : SCEVCommutativeExpr(ID, Num, scAddExpr, O, N) {
+      : SCEVCommutativeExpr(ID, scAddExpr, O, N) {
     }
 
   public:
@@ -316,9 +297,9 @@ namespace llvm {
   class SCEVMulExpr : public SCEVCommutativeExpr {
     friend class ScalarEvolution;
 
-    SCEVMulExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVMulExpr(const FoldingSetNodeIDRef ID,
                 const SCEV *const *O, size_t N)
-      : SCEVCommutativeExpr(ID, Num, scMulExpr, O, N) {
+      : SCEVCommutativeExpr(ID, scMulExpr, O, N) {
     }
 
   public:
@@ -340,9 +321,8 @@ namespace llvm {
 
     const SCEV *LHS;
     const SCEV *RHS;
-    SCEVUDivExpr(const FoldingSetNodeIDRef ID, unsigned Num,
-                 const SCEV *lhs, const SCEV *rhs)
-      : SCEV(ID, Num, scUDivExpr), LHS(lhs), RHS(rhs) {}
+    SCEVUDivExpr(const FoldingSetNodeIDRef ID, const SCEV *lhs, const SCEV *rhs)
+      : SCEV(ID, scUDivExpr), LHS(lhs), RHS(rhs) {}
 
   public:
     const SCEV *getLHS() const { return LHS; }
@@ -391,9 +371,9 @@ namespace llvm {
 
     const Loop *L;
 
-    SCEVAddRecExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVAddRecExpr(const FoldingSetNodeIDRef ID,
                    const SCEV *const *O, size_t N, const Loop *l)
-      : SCEVNAryExpr(ID, Num, scAddRecExpr, O, N), L(l) {
+      : SCEVNAryExpr(ID, scAddRecExpr, O, N), L(l) {
       for (size_t i = 0, e = NumOperands; i != e; ++i)
         assert(Operands[i]->isLoopInvariant(l) &&
                "Operands of AddRec must be loop-invariant!");
@@ -473,9 +453,9 @@ namespace llvm {
   class SCEVSMaxExpr : public SCEVCommutativeExpr {
     friend class ScalarEvolution;
 
-    SCEVSMaxExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVSMaxExpr(const FoldingSetNodeIDRef ID,
                  const SCEV *const *O, size_t N)
-      : SCEVCommutativeExpr(ID, Num, scSMaxExpr, O, N) {
+      : SCEVCommutativeExpr(ID, scSMaxExpr, O, N) {
       // Max never overflows.
       setHasNoUnsignedWrap(true);
       setHasNoSignedWrap(true);
@@ -498,9 +478,9 @@ namespace llvm {
   class SCEVUMaxExpr : public SCEVCommutativeExpr {
     friend class ScalarEvolution;
 
-    SCEVUMaxExpr(const FoldingSetNodeIDRef ID, unsigned Num,
+    SCEVUMaxExpr(const FoldingSetNodeIDRef ID,
                  const SCEV *const *O, size_t N)
-      : SCEVCommutativeExpr(ID, Num, scUMaxExpr, O, N) {
+      : SCEVCommutativeExpr(ID, scUMaxExpr, O, N) {
       // Max never overflows.
       setHasNoUnsignedWrap(true);
       setHasNoSignedWrap(true);
@@ -521,15 +501,28 @@ namespace llvm {
   /// value, and only represent it as its LLVM Value.  This is the "bottom"
   /// value for the analysis.
   ///
-  class SCEVUnknown : public SCEV {
+  class SCEVUnknown : public SCEV, private CallbackVH {
     friend class ScalarEvolution;
 
-    Value *V;
-    SCEVUnknown(const FoldingSetNodeIDRef ID, unsigned Num, Value *v)
-      : SCEV(ID, Num, scUnknown), V(v) {}
+    // Implement CallbackVH.
+    virtual void deleted();
+    virtual void allUsesReplacedWith(Value *New);
+
+    /// SE - The parent ScalarEvolution value. This is used to update
+    /// the parent's maps when the value associated with a SCEVUnknown
+    /// is deleted or RAUW'd.
+    ScalarEvolution *SE;
+
+    /// Next - The next pointer in the linked list of all
+    /// SCEVUnknown instances owned by a ScalarEvolution.
+    SCEVUnknown *Next;
+
+    SCEVUnknown(const FoldingSetNodeIDRef ID, Value *V,
+                ScalarEvolution *se, SCEVUnknown *next) :
+      SCEV(ID, scUnknown), CallbackVH(V), SE(se), Next(next) {}
 
   public:
-    Value *getValue() const { return V; }
+    Value *getValue() const { return getValPtr(); }
 
     /// isSizeOf, isAlignOf, isOffsetOf - Test whether this is a special
     /// constant representing a type size, alignment, or field offset in