SCEVHandle getSMaxExpr(SmallVectorImpl<SCEVHandle> &Operands);
SCEVHandle getUMaxExpr(const SCEVHandle &LHS, const SCEVHandle &RHS);
SCEVHandle getUMaxExpr(SmallVectorImpl<SCEVHandle> &Operands);
+ SCEVHandle getSMinExpr(const SCEVHandle &LHS, const SCEVHandle &RHS);
+ SCEVHandle getUMinExpr(const SCEVHandle &LHS, const SCEVHandle &RHS);
SCEVHandle getUnknown(Value *V);
SCEVHandle getCouldNotCompute();
return Result;
}
+SCEVHandle ScalarEvolution::getSMinExpr(const SCEVHandle &LHS,
+ const SCEVHandle &RHS) {
+ // ~smax(~x, ~y) == smin(x, y).
+ return getNotSCEV(getSMaxExpr(getNotSCEV(LHS), getNotSCEV(RHS)));
+}
+
+SCEVHandle ScalarEvolution::getUMinExpr(const SCEVHandle &LHS,
+ const SCEVHandle &RHS) {
+ // ~umax(~x, ~y) == umin(x, y)
+ return getNotSCEV(getUMaxExpr(getNotSCEV(LHS), getNotSCEV(RHS)));
+}
+
SCEVHandle ScalarEvolution::getUnknown(Value *V) {
if (ConstantInt *CI = dyn_cast<ConstantInt>(V))
return getConstant(CI);
if (LHS == U->getOperand(1) && RHS == U->getOperand(2))
return getSMaxExpr(getSCEV(LHS), getSCEV(RHS));
else if (LHS == U->getOperand(2) && RHS == U->getOperand(1))
- // ~smax(~x, ~y) == smin(x, y).
- return getNotSCEV(getSMaxExpr(
- getNotSCEV(getSCEV(LHS)),
- getNotSCEV(getSCEV(RHS))));
+ return getSMinExpr(getSCEV(LHS), getSCEV(RHS));
break;
case ICmpInst::ICMP_ULT:
case ICmpInst::ICMP_ULE:
if (LHS == U->getOperand(1) && RHS == U->getOperand(2))
return getUMaxExpr(getSCEV(LHS), getSCEV(RHS));
else if (LHS == U->getOperand(2) && RHS == U->getOperand(1))
- // ~umax(~x, ~y) == umin(x, y)
- return getNotSCEV(getUMaxExpr(getNotSCEV(getSCEV(LHS)),
- getNotSCEV(getSCEV(RHS))));
+ return getUMinExpr(getSCEV(LHS), getSCEV(RHS));
break;
case ICmpInst::ICMP_NE:
// n != 0 ? n : 1 -> umax(n, 1)