Make DomTree and PostDomTree thin wrappers around DomTreeBase, rather than inheriting from it.

llvm-svn: 43259

1 files changed, 1 insertions, 19 deletions

diff --git a/llvm/lib/Analysis/PostDominators.cpp b/llvm/lib/Analysis/PostDominators.cpp
index 0384fad732e..370cd955299 100644
--- a/llvm/lib/Analysis/PostDominators.cpp
+++ b/llvm/lib/Analysis/PostDominators.cpp
@@ -29,25 +29,7 @@ static RegisterPass<PostDominatorTree>
 F("postdomtree", "Post-Dominator Tree Construction", true);
 
 bool PostDominatorTree::runOnFunction(Function &F) {
-  reset();     // Reset from the last time we were run...
-    
-  // Initialize the roots list
-  for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
-    TerminatorInst *Insn = I->getTerminator();
-    if (Insn->getNumSuccessors() == 0) {
-      // Unreachable block is not a root node.
-      if (!isa<UnreachableInst>(Insn))
-        Roots.push_back(I);
-    }
-    
-    // Prepopulate maps so that we don't get iterator invalidation issues later.
-    IDoms[I] = 0;
-    DomTreeNodes[I] = 0;
-  }
-  
-  Vertex.push_back(0);
-    
-  Calculate<Inverse<BasicBlock*>, GraphTraits<Inverse<BasicBlock*> > >(*this, F);
+  DT->recalculate(F);
   return false;
 }