+
+ virtual const SCEV *visitZeroExtendExpr(const SCEVZeroExtendExpr *Expr) {
+ const SCEV *Operand = visit(Expr->getOperand());
+ return SE.getZeroExtendExpr(Operand, Expr->getType());
+ }
+
+ virtual const SCEV *visitSignExtendExpr(const SCEVSignExtendExpr *Expr) {
+ const SCEV *Operand = visit(Expr->getOperand());
+ return SE.getSignExtendExpr(Operand, Expr->getType());
+ }
+
+ virtual const SCEV *visitAddExpr(const SCEVAddExpr *Expr) {
+ SmallVector<const SCEV *, 2> Operands;
+ for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
+ Operands.push_back(visit(Expr->getOperand(i)));
+ return SE.getAddExpr(Operands);
+ }
+
+ virtual const SCEV *visitMulExpr(const SCEVMulExpr *Expr) {
+ SmallVector<const SCEV *, 2> Operands;
+ for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
+ Operands.push_back(visit(Expr->getOperand(i)));
+ return SE.getMulExpr(Operands);
+ }
+
+ virtual const SCEV *visitUDivExpr(const SCEVUDivExpr *Expr) {
+ return SE.getUDivExpr(visit(Expr->getLHS()), visit(Expr->getRHS()));
+ }
+
+ virtual const SCEV *visitAddRecExpr(const SCEVAddRecExpr *Expr) {
+ SmallVector<const SCEV *, 2> Operands;
+ for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
+ Operands.push_back(visit(Expr->getOperand(i)));
+ return SE.getAddRecExpr(Operands, Expr->getLoop(),
+ Expr->getNoWrapFlags());
+ }
+
+ virtual const SCEV *visitSMaxExpr(const SCEVSMaxExpr *Expr) {
+ SmallVector<const SCEV *, 2> Operands;
+ for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
+ Operands.push_back(visit(Expr->getOperand(i)));
+ return SE.getSMaxExpr(Operands);
+ }
+
+ virtual const SCEV *visitUMaxExpr(const SCEVUMaxExpr *Expr) {
+ SmallVector<const SCEV *, 2> Operands;
+ for (int i = 0, e = Expr->getNumOperands(); i < e; ++i)
+ Operands.push_back(visit(Expr->getOperand(i)));
+ return SE.getUMaxExpr(Operands);
+ }
+
+ virtual const SCEV *visitUnknown(const SCEVUnknown *Expr) {
+ return Expr;
+ }
+
+ virtual const SCEV *visitCouldNotCompute(const SCEVCouldNotCompute *Expr) {
+ return Expr;
+ }
+
+ protected:
+ ScalarEvolution &SE;