[polly] r249545 - IRBuilder: Use Map.lookup instead of Map.find [NFC]

[Tobias Grosser via llvm-commits]

Author: grosser
Date: Wed Oct  7 08:35:20 2015
New Revision: 249545

URL: http://llvm.org/viewvc/llvm-project?rev=249545&view=rev
Log:
IRBuilder: Use Map.lookup instead of Map.find [NFC]

This simplifies the code.

Suggested-by: Johannes Doerfert

Modified:
    polly/trunk/lib/CodeGen/IRBuilder.cpp

Modified: polly/trunk/lib/CodeGen/IRBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/polly/trunk/lib/CodeGen/IRBuilder.cpp?rev=249545&r1=249544&r2=249545&view=diff
==============================================================================
--- polly/trunk/lib/CodeGen/IRBuilder.cpp (original)
+++ polly/trunk/lib/CodeGen/IRBuilder.cpp Wed Oct  7 08:35:20 2015
@@ -146,20 +146,18 @@ void ScopAnnotator::annotate(Instruction
   if (!BasePtr)
     return;
 
-  auto AliasScopeIterator = AliasScopeMap.find(BasePtr);
+  auto AliasScope = AliasScopeMap.lookup(BasePtr);
 
-  if (AliasScopeIterator == AliasScopeMap.end()) {
-    auto I = AlternativeAliasBases.find(BasePtr);
-    if (I == AlternativeAliasBases.end())
+  if (!AliasScope) {
+    BasePtr = AlternativeAliasBases.lookup(BasePtr);
+    if (!BasePtr)
       return;
 
-    BasePtr = I->second;
-    AliasScopeIterator = AliasScopeMap.find(BasePtr);
-    if (AliasScopeIterator == AliasScopeMap.end())
+    AliasScope = AliasScopeMap.lookup(BasePtr);
+    if (!AliasScope)
       return;
   }
 
-  auto AliasScope = AliasScopeIterator->second;
   assert(OtherAliasScopeListMap.count(BasePtr) &&
          "BasePtr either expected in AliasScopeMap and OtherAlias...Map");
   auto *OtherAliasScopeList = OtherAliasScopeListMap[BasePtr];