diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/CodeGen/DAGISelHeader.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/DAGISelHeader.h b/include/llvm/CodeGen/DAGISelHeader.h index 3b4da66..28b2277 100644 --- a/include/llvm/CodeGen/DAGISelHeader.h +++ b/include/llvm/CodeGen/DAGISelHeader.h @@ -108,6 +108,11 @@ void SelectRoot(SelectionDAG &DAG) { // node). while (ISelPosition != CurDAG->allnodes_begin()) { SDNode *Node = --ISelPosition; + // Skip dead nodes. DAGCombiner is expected to eliminate all dead nodes, + // but there are currently some corner cases that it misses. Also, this + // makes it theoretically possible to disable the DAGCombiner. + if (Node->use_empty()) + continue; #if 0 DAG.setSubgraphColor(Node, "red"); #endif |