Revert r143206, as there are still some failing tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143262 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 16 deletions

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 010a740dc7..07d2db63fa 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -5290,10 +5290,6 @@ void SelectionDAG::ReplaceAllUsesWith(SDValue FromN, SDValue To,
     // already exists there, recursively merge the results together.
     AddModifiedNodeToCSEMaps(User, &Listener);
   }
-
-  // If we just RAUW'd the root, take note.
-  if (FromN == getRoot())
-    setRoot(To);
 }
 
 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
@@ -5339,10 +5335,6 @@ void SelectionDAG::ReplaceAllUsesWith(SDNode *From, SDNode *To,
     // already exists there, recursively merge the results together.
     AddModifiedNodeToCSEMaps(User, &Listener);
   }
-
-  // If we just RAUW'd the root, take note.
-  if (From == getRoot().getNode())
-    setRoot(SDValue(To, getRoot().getResNo()));
 }
 
 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
@@ -5381,10 +5373,6 @@ void SelectionDAG::ReplaceAllUsesWith(SDNode *From,
     // already exists there, recursively merge the results together.
     AddModifiedNodeToCSEMaps(User, &Listener);
   }
-
-  // If we just RAUW'd the root, take note.
-  if (From == getRoot().getNode())
-    setRoot(SDValue(To[getRoot().getResNo()]));
 }
 
 /// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving
@@ -5443,10 +5431,6 @@ void SelectionDAG::ReplaceAllUsesOfValueWith(SDValue From, SDValue To,
     // already exists there, recursively merge the results together.
     AddModifiedNodeToCSEMaps(User, &Listener);
   }
-
-  // If we just RAUW'd the root, take note.
-  if (From == getRoot())
-    setRoot(To);
 }
 
 namespace {