[llvm] r326000 - [MemorySSA] Remove a redundant dyn_cast.

[George Burgess IV via llvm-commits]

Author: gbiv
Date: Fri Feb 23 16:15:21 2018
New Revision: 326000

URL: http://llvm.org/viewvc/llvm-project?rev=326000&view=rev
Log:
[MemorySSA] Remove a redundant dyn_cast.

StartingAccess is a MemoryUseOrDef. No need to check again.

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=326000&r1=325999&r2=326000&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/MemorySSA.cpp (original)
+++ llvm/trunk/lib/Analysis/MemorySSA.cpp Fri Feb 23 16:15:21 2018
@@ -2029,9 +2029,8 @@ MemorySSA::CachingWalker::getClobberingM
   // If this is an already optimized use or def, return the optimized result.
   // Note: Currently, we do not store the optimized def result because we'd need
   // a separate field, since we can't use it as the defining access.
-  if (auto *MUD = dyn_cast<MemoryUseOrDef>(StartingAccess))
-    if (MUD->isOptimized())
-      return MUD->getOptimized();
+  if (StartingAccess->isOptimized())
+    return StartingAccess->getOptimized();
 
   const Instruction *I = StartingAccess->getMemoryInst();
   UpwardsMemoryQuery Q(I, StartingAccess);