diff options
| -rw-r--r-- | llvm/lib/Target/ARM/ARMISelLowering.cpp | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp index 70446de9a12..16111557650 100644 --- a/llvm/lib/Target/ARM/ARMISelLowering.cpp +++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp @@ -11606,8 +11606,15 @@ static SDValue CombineBaseUpdate(SDNode *N, continue; // Check that the add is independent of the load/store. Otherwise, folding - // it would create a cycle. - if (User->isPredecessorOf(N) || N->isPredecessorOf(User)) + // it would create a cycle. We can avoid searching through Addr as it's a + // predecessor to both. + SmallPtrSet<const SDNode *, 32> Visited; + SmallVector<const SDNode *, 16> Worklist; + Visited.insert(Addr.getNode()); + Worklist.push_back(N); + Worklist.push_back(User); + if (SDNode::hasPredecessorHelper(N, Visited, Worklist) || + SDNode::hasPredecessorHelper(User, Visited, Worklist)) continue; // Find the new opcode for the updating load/store. |
