[llvm-commits] [llvm] r158839 - /llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

[Pete Cooper]

Author: pete
Date: Wed Jun 20 14:35:43 2012
New Revision: 158839

URL: http://llvm.org/viewvc/llvm-project?rev=158839&view=rev
Log:
Add users of a MERGE_VALUE node to the worklist to process again when the node is removed.  Sorry, no test case.  Foudn it by inspection of the code

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=158839&r1=158838&r2=158839&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Wed Jun 20 14:35:43 2012
@@ -1322,6 +1322,9 @@
   // Replacing results may cause a different MERGE_VALUES to suddenly
   // be CSE'd with N, and carry its uses with it. Iterate until no
   // uses remain, to ensure that the node can be safely deleted.
+  // First add the users of this node to the work list so that they
+  // can be tried again once they have new operands.
+  AddUsersToWorkList(N);
   do {
     for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
       DAG.ReplaceAllUsesOfValueWith(SDValue(N, i), N->getOperand(i));