[llvm] r257086 - [DominatorTree] Remove unnecessary map population. NFC.

[Michael Liao via llvm-commits]

Author: hliao
Date: Thu Jan  7 13:21:29 2016
New Revision: 257086

URL: http://llvm.org/viewvc/llvm-project?rev=257086&view=rev
Log:
[DominatorTree] Remove unnecessary map population. NFC.

- The reason of population these maps seems not valid any more.


Modified:
    llvm/trunk/include/llvm/Support/GenericDomTree.h

Modified: llvm/trunk/include/llvm/Support/GenericDomTree.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/GenericDomTree.h?rev=257086&r1=257085&r2=257086&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/GenericDomTree.h (original)
+++ llvm/trunk/include/llvm/Support/GenericDomTree.h Thu Jan  7 13:21:29 2016
@@ -724,25 +724,17 @@ public:
     if (!this->IsPostDominators) {
       // Initialize root
       NodeT *entry = TraitsTy::getEntryNode(&F);
-      this->Roots.push_back(entry);
-      this->IDoms[entry] = nullptr;
-      this->DomTreeNodes[entry] = nullptr;
+      addRoot(entry);
 
       Calculate<FT, NodeT *>(*this, F);
     } else {
       // Initialize the roots list
       for (typename TraitsTy::nodes_iterator I = TraitsTy::nodes_begin(&F),
                                              E = TraitsTy::nodes_end(&F);
-           I != E; ++I) {
+           I != E; ++I)
         if (TraitsTy::child_begin(&*I) == TraitsTy::child_end(&*I))
           addRoot(&*I);
 
-        // Prepopulate maps so that we don't get iterator invalidation issues
-        // later.
-        this->IDoms[&*I] = nullptr;
-        this->DomTreeNodes[&*I] = nullptr;
-      }
-
       Calculate<FT, Inverse<NodeT *>>(*this, F);
     }
   }