Revert "Support: Partially revert r249782 to unbreak clang build"

This reverts commit r249783, fully reinstating r249782.  I've fixed the
bug in clang: it was a non-const iterator that dereferenced to const
(but had an implicit conversion to non-const).

llvm-svn: 249850

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/include/llvm/Support/GenericDomTree.h b/llvm/include/llvm/Support/GenericDomTree.h
index a790d754d20..8751f272cd2 100644
--- a/llvm/include/llvm/Support/GenericDomTree.h
+++ b/llvm/include/llvm/Support/GenericDomTree.h
@@ -734,13 +734,13 @@ public:
       for (typename TraitsTy::nodes_iterator I = TraitsTy::nodes_begin(&F),
                                              E = TraitsTy::nodes_end(&F);
            I != E; ++I) {
-        if (TraitsTy::child_begin(I) == TraitsTy::child_end(I))
-          addRoot(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;
+        this->IDoms[&*I] = nullptr;
+        this->DomTreeNodes[&*I] = nullptr;
       }
 
       Calculate<FT, Inverse<NodeT *>>(*this, F);