[llvm] r222376 - AliasSet: Simplify mergeSetIn

[David Majnemer]

Author: majnemer
Date: Wed Nov 19 13:36:18 2014
New Revision: 222376

URL: http://llvm.org/viewvc/llvm-project?rev=222376&view=rev
Log:
AliasSet: Simplify mergeSetIn

No functional change intended.

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

Modified: llvm/trunk/lib/Analysis/AliasSetTracker.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/AliasSetTracker.cpp?rev=222376&r1=222375&r2=222376&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/AliasSetTracker.cpp (original)
+++ llvm/trunk/lib/Analysis/AliasSetTracker.cpp Wed Nov 19 13:36:18 2014
@@ -55,16 +55,15 @@ void AliasSet::mergeSetIn(AliasSet &AS,
       AliasTy = MayAlias;
   }
 
-  bool ASHadUnknownInsts = false;
+  bool ASHadUnknownInsts = !AS.UnknownInsts.empty();
   if (UnknownInsts.empty()) {            // Merge call sites...
-    if (!AS.UnknownInsts.empty()) {
+    if (ASHadUnknownInsts) {
       std::swap(UnknownInsts, AS.UnknownInsts);
       addRef();
     }
-  } else if (!AS.UnknownInsts.empty()) {
+  } else if (ASHadUnknownInsts) {
     UnknownInsts.insert(UnknownInsts.end(), AS.UnknownInsts.begin(), AS.UnknownInsts.end());
     AS.UnknownInsts.clear();
-    ASHadUnknownInsts = true;
   }
 
   AS.Forward = this;  // Forward across AS now...