Use phi ranges to simplify code. No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321585 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 12 deletions

diff --git a/lib/IR/Verifier.cpp b/lib/IR/Verifier.cpp
index 534104686d8..1754f7d4501 100644
--- a/lib/IR/Verifier.cpp
+++ b/lib/IR/Verifier.cpp
@@ -2210,24 +2210,23 @@ void Verifier::visitBasicBlock(BasicBlock &BB) {
     SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
     SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
     std::sort(Preds.begin(), Preds.end());
-    PHINode *PN;
-    for (BasicBlock::iterator I = BB.begin(); (PN = dyn_cast<PHINode>(I));++I) {
+    for (const PHINode &PN : BB.phis()) {
       // Ensure that PHI nodes have at least one entry!
-      Assert(PN->getNumIncomingValues() != 0,
+      Assert(PN.getNumIncomingValues() != 0,
              "PHI nodes must have at least one entry.  If the block is dead, "
              "the PHI should be removed!",
-             PN);
-      Assert(PN->getNumIncomingValues() == Preds.size(),
+             &PN);
+      Assert(PN.getNumIncomingValues() == Preds.size(),
              "PHINode should have one entry for each predecessor of its "
              "parent basic block!",
-             PN);
+             &PN);
 
       // Get and sort all incoming values in the PHI node...
       Values.clear();
-      Values.reserve(PN->getNumIncomingValues());
-      for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
-        Values.push_back(std::make_pair(PN->getIncomingBlock(i),
-                                        PN->getIncomingValue(i)));
+      Values.reserve(PN.getNumIncomingValues());
+      for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i)
+        Values.push_back(
+            std::make_pair(PN.getIncomingBlock(i), PN.getIncomingValue(i)));
       std::sort(Values.begin(), Values.end());
 
       for (unsigned i = 0, e = Values.size(); i != e; ++i) {
@@ -2239,12 +2238,12 @@ void Verifier::visitBasicBlock(BasicBlock &BB) {
                    Values[i].second == Values[i - 1].second,
                "PHI node has multiple entries for the same basic block with "
                "different incoming values!",
-               PN, Values[i].first, Values[i].second, Values[i - 1].second);
+               &PN, Values[i].first, Values[i].second, Values[i - 1].second);
 
         // Check to make sure that the predecessors and PHI node entries are
         // matched up.
         Assert(Values[i].first == Preds[i],
-               "PHI node entries do not match predecessors!", PN,
+               "PHI node entries do not match predecessors!", &PN,
                Values[i].first, Preds[i]);
       }
     }