[llvm] r335399 - [MSSA] Remove incorrect comment + `auto`ify dyn_cast results; NFC

[George Burgess IV via llvm-commits]

Author: gbiv
Date: Fri Jun 22 15:34:07 2018
New Revision: 335399

URL: http://llvm.org/viewvc/llvm-project?rev=335399&view=rev
Log:
[MSSA] Remove incorrect comment + `auto`ify dyn_cast results; NFC

Modified:
    llvm/trunk/lib/Analysis/MemorySSA.cpp

Modified: llvm/trunk/lib/Analysis/MemorySSA.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/MemorySSA.cpp?rev=335399&r1=335398&r2=335399&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/MemorySSA.cpp (original)
+++ llvm/trunk/lib/Analysis/MemorySSA.cpp Fri Jun 22 15:34:07 2018
@@ -1573,19 +1573,18 @@ void MemorySSA::removeFromLookups(Memory
   assert(MA->use_empty() &&
          "Trying to remove memory access that still has uses");
   BlockNumbering.erase(MA);
-  if (MemoryUseOrDef *MUD = dyn_cast<MemoryUseOrDef>(MA))
+  if (auto *MUD = dyn_cast<MemoryUseOrDef>(MA))
     MUD->setDefiningAccess(nullptr);
   // Invalidate our walker's cache if necessary
   if (!isa<MemoryUse>(MA))
     Walker->invalidateInfo(MA);
-  // The call below to erase will destroy MA, so we can't change the order we
-  // are doing things here
+
   Value *MemoryInst;
-  if (MemoryUseOrDef *MUD = dyn_cast<MemoryUseOrDef>(MA)) {
+  if (const auto *MUD = dyn_cast<MemoryUseOrDef>(MA))
     MemoryInst = MUD->getMemoryInst();
-  } else {
+  else
     MemoryInst = MA->getBlock();
-  }
+
   auto VMA = ValueToMemoryAccess.find(MemoryInst);
   if (VMA->second == MA)
     ValueToMemoryAccess.erase(VMA);