Correctly walk through nested and adjacent CALLSEQ_START nodes. No
test case; I've only seen this on a release branch, and I can't get it
to reproduce on trunk. rdar://problem/7662569
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131152 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 2b6c56e..e2e6691 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -324,6 +324,7 @@
case ISD::CALLSEQ_START:
if (!nested)
return Node;
+ Node = Node->getOperand(0).getNode();
nested--;
break;
case ISD::CALLSEQ_END:
@@ -331,7 +332,7 @@
break;
}
}
- return 0;
+ return (Node->getOpcode() == ISD::CALLSEQ_START) ? Node : 0;
}
/// LegalizeAllNodesNotLeadingTo - Recursively walk the uses of N, looking to