record input chains.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96437 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/DAGISelMatcherGen.cpp b/utils/TableGen/DAGISelMatcherGen.cpp
index 345b964..5936e75 100644
--- a/utils/TableGen/DAGISelMatcherGen.cpp
+++ b/utils/TableGen/DAGISelMatcherGen.cpp
@@ -194,6 +194,15 @@
// the child numbers of the node are all offset by one.
unsigned OpNo = 0;
if (N->NodeHasProperty(SDNPHasChain, CGP)) {
+ // Record the input chain, which is always input #0 of the SDNode.
+ AddMatcherNode(new MoveChildMatcherNode(0));
+ ++NextRecordedOperandNo;
+ AddMatcherNode(new RecordMatcherNode("'" + N->getOperator()->getName() +
+ "' input chain"));
+ AddMatcherNode(new MoveParentMatcherNode());
+
+ // Don't look at the input chain when matching the tree pattern to the
+ // SDNode.
OpNo = 1;
// If this node is not the root and the subtree underneath it produces a