[LSR][NFC] Use range-based for

Author: pfusik

llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp

@@ -2664,15 +2664,15 @@ LSRInstance::OptimizeLoopTermCond() {
     // Conservatively avoid trying to use the post-inc value in non-latch
     // exits if there may be pre-inc users in intervening blocks.
     if (LatchBlock != ExitingBlock)
-      for (IVUsers::const_iterator UI = IU.begin(), E = IU.end(); UI != E; ++UI)
+      for (const IVStrideUse &UI : IU)
         // Test if the use is reachable from the exiting block. This dominator
         // query is a conservative approximation of reachability.
-        if (&*UI != CondUse &&
-            !DT.properlyDominates(UI->getUser()->getParent(), ExitingBlock)) {
+        if (&UI != CondUse &&
+            !DT.properlyDominates(UI.getUser()->getParent(), ExitingBlock)) {
           // Conservatively assume there may be reuse if the quotient of their
           // strides could be a legal scale.
           const SCEV *A = IU.getStride(*CondUse, L);
-          const SCEV *B = IU.getStride(*UI, L);
+          const SCEV *B = IU.getStride(UI, L);
           if (!A || !B) continue;
           if (SE.getTypeSizeInBits(A->getType()) !=
               SE.getTypeSizeInBits(B->getType())) {
@@ -2693,9 +2693,9 @@ LSRInstance::OptimizeLoopTermCond() {
                 C->getValue().isMinSignedValue())
               goto decline_post_inc;
             // Check for possible scaled-address reuse.
-            if (isAddressUse(TTI, UI->getUser(), UI->getOperandValToReplace())) {
+            if (isAddressUse(TTI, UI.getUser(), UI.getOperandValToReplace())) {
               MemAccessTy AccessTy = getAccessType(
-                  TTI, UI->getUser(), UI->getOperandValToReplace());
+                  TTI, UI.getUser(), UI.getOperandValToReplace());
               int64_t Scale = C->getSExtValue();
               if (TTI.isLegalAddressingMode(AccessTy.MemTy, /*BaseGV=*/nullptr,
                                             /*BaseOffset=*/0,