[Hexagon] Rangify some loops, NFC

Recommit r315763 with a fix.

llvm-svn: 315925

1 files changed, 3 insertions, 9 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonBitTracker.cpp b/llvm/lib/Target/Hexagon/HexagonBitTracker.cpp
index 08e08fe5087..e62e006e40c 100644
--- a/llvm/lib/Target/Hexagon/HexagonBitTracker.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonBitTracker.cpp
@@ -60,12 +60,8 @@ HexagonEvaluator::HexagonEvaluator(const HexagonRegisterInfo &tri,
   // der the initial sequence of formal parameters that are known to be
   // passed via registers.
   unsigned InVirtReg, InPhysReg = 0;
-  const Function &F = *MF.getFunction();
 
-  using arg_iterator = Function::const_arg_iterator;
-
-  for (arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
-    const Argument &Arg = *I;
+  for (const Argument &Arg : MF.getFunction()->args()) {
     Type *ATy = Arg.getType();
     unsigned Width = 0;
     if (ATy->isIntegerTy())
@@ -190,8 +186,7 @@ bool HexagonEvaluator::evaluate(const MachineInstr &MI,
   unsigned NumDefs = 0;
 
   // Sanity verification: there should not be any defs with subregisters.
-  for (unsigned i = 0, n = MI.getNumOperands(); i < n; ++i) {
-    const MachineOperand &MO = MI.getOperand(i);
+  for (const MachineOperand &MO : MI.operands()) {
     if (!MO.isReg() || !MO.isDef())
       continue;
     NumDefs++;
@@ -240,8 +235,7 @@ bool HexagonEvaluator::evaluate(const MachineInstr &MI,
   // checking what kind of operand a given instruction has individually
   // for each instruction, do it here. Global symbols as operands gene-
   // rally do not provide any useful information.
-  for (unsigned i = 0, n = MI.getNumOperands(); i < n; ++i) {
-    const MachineOperand &MO = MI.getOperand(i);
+  for (const MachineOperand &MO : MI.operands()) {
     if (MO.isGlobal() || MO.isBlockAddress() || MO.isSymbol() || MO.isJTI() ||
         MO.isCPI())
       return false;