Revert "[DAG] Cleanup of unused node in SimplifySelectCC."
Causes ASAN use-after-poison errors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353442 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index a3ad2c2..dabb8afd 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -18673,21 +18673,14 @@
auto *N3C = dyn_cast<ConstantSDNode>(N3.getNode());
// Determine if the condition we're dealing with is constant.
- if (SDValue SCC =
- SimplifySetCC(getSetCCResultType(CmpOpVT), N0, N1, CC, DL, false)) {
- AddToWorklist(SCC.getNode());
- if (auto *SCCC = dyn_cast<ConstantSDNode>(SCC.getNode())) {
- // fold select_cc true, x, y -> x
- // fold select_cc false, x, y -> y
- bool isNull = SCCC->isNullValue();
- SDValue RV = isNull ? N3 : N2;
- // Delete SCC if we don't use it.
- if (SCCC != RV.getNode())
- recursivelyDeleteUnusedNodes(SCCC);
- return RV;
- }
- // Don't combine. Cleanup SCC.
- recursivelyDeleteUnusedNodes(SCC.getNode());
+ SDValue SCC = SimplifySetCC(getSetCCResultType(CmpOpVT), N0, N1, CC, DL,
+ false);
+ if (SCC.getNode()) AddToWorklist(SCC.getNode());
+
+ if (auto *SCCC = dyn_cast_or_null<ConstantSDNode>(SCC.getNode())) {
+ // fold select_cc true, x, y -> x
+ // fold select_cc false, x, y -> y
+ return !SCCC->isNullValue() ? N2 : N3;
}
if (SDValue V =