[SelectionDAG] Allow custom vector widening through ReplaceNodeResults to handle nodes with chain outputs.

Previously we were assuming all results were vectors and calling SetWidenedVector, but if its a chain result we should just replace uses instead.

This fixes an error found by expensive checks after r318368.

llvm-svn: 318509

1 files changed, 7 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
index 73e29969a21..85154ffb14d 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
@@ -1027,8 +1027,13 @@ bool DAGTypeLegalizer::CustomWidenLowerNode(SDNode *N, EVT VT) {
   // Update the widening map.
   assert(Results.size() == N->getNumValues() &&
          "Custom lowering returned the wrong number of results!");
-  for (unsigned i = 0, e = Results.size(); i != e; ++i)
-    SetWidenedVector(SDValue(N, i), Results[i]);
+  for (unsigned i = 0, e = Results.size(); i != e; ++i) {
+    // If this is a chain output just replace it.
+    if (Results[i].getValueType() == MVT::Other)
+      ReplaceValueWith(SDValue(N, i), Results[i]);
+    else
+      SetWidenedVector(SDValue(N, i), Results[i]);
+  }
   return true;
 }