[Analysis] Use range-based for loops (NFC) (#103540)

Author: kazutakahirata

llvm/lib/Analysis/DependenceAnalysis.cpp

@@ -2450,8 +2450,7 @@ bool DependenceInfo::gcdMIVtest(const SCEV *Src, const SCEV *Dst,
   const SCEVConstant *Constant = dyn_cast<SCEVConstant>(Delta);
   if (const SCEVAddExpr *Sum = dyn_cast<SCEVAddExpr>(Delta)) {
     // If Delta is a sum of products, we may be able to make further progress.
-    for (unsigned Op = 0, Ops = Sum->getNumOperands(); Op < Ops; Op++) {
-      const SCEV *Operand = Sum->getOperand(Op);
+    for (const SCEV *Operand : Sum->operands()) {
       if (isa<SCEVConstant>(Operand)) {
         assert(!Constant && "Surprised to find multiple constants");
         Constant = cast<SCEVConstant>(Operand);

llvm/lib/Analysis/ScalarEvolution.cpp

@@ -6664,17 +6664,17 @@ const ConstantRange &ScalarEvolution::getRangeRef(
       WrapType |= OBO::NoSignedWrap;
     if (Add->hasNoUnsignedWrap())
       WrapType |= OBO::NoUnsignedWrap;
-    for (unsigned i = 1, e = Add->getNumOperands(); i != e; ++i)
-      X = X.addWithNoWrap(getRangeRef(Add->getOperand(i), SignHint, Depth + 1),
-                          WrapType, RangeType);
+    for (const SCEV *Op : drop_begin(Add->operands()))
+      X = X.addWithNoWrap(getRangeRef(Op, SignHint, Depth + 1), WrapType,
+                          RangeType);
     return setRange(Add, SignHint,
                     ConservativeResult.intersectWith(X, RangeType));
   }
   case scMulExpr: {
     const SCEVMulExpr *Mul = cast<SCEVMulExpr>(S);
     ConstantRange X = getRangeRef(Mul->getOperand(0), SignHint, Depth + 1);
-    for (unsigned i = 1, e = Mul->getNumOperands(); i != e; ++i)
-      X = X.multiply(getRangeRef(Mul->getOperand(i), SignHint, Depth + 1));
+    for (const SCEV *Op : drop_begin(Mul->operands()))
+      X = X.multiply(getRangeRef(Op, SignHint, Depth + 1));
     return setRange(Mul, SignHint,
                     ConservativeResult.intersectWith(X, RangeType));
   }