vendor/llvm/llvm-trunk-r366426

1 files changed, 9 insertions, 5 deletions

diff --git a/lib/CodeGen/SelectionDAG/StatepointLowering.h b/lib/CodeGen/SelectionDAG/StatepointLowering.h
index 372c82a359f6..70507932681d 100644
--- a/lib/CodeGen/SelectionDAG/StatepointLowering.h
+++ b/lib/CodeGen/SelectionDAG/StatepointLowering.h
@@ -1,9 +1,8 @@
 //===- StatepointLowering.h - SDAGBuilder's statepoint code ---*- C++ -*---===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -67,13 +66,18 @@ public:
   /// before the next statepoint.  If we don't see it, we'll report
   /// an assertion.
   void scheduleRelocCall(const CallInst &RelocCall) {
-    PendingGCRelocateCalls.push_back(&RelocCall);
+    // We are not interested in lowering dead instructions.
+    if (!RelocCall.use_empty())
+      PendingGCRelocateCalls.push_back(&RelocCall);
   }
 
   /// Remove this gc_relocate from the list we're expecting to see
   /// before the next statepoint.  If we weren't expecting to see
   /// it, we'll report an assertion.
   void relocCallVisited(const CallInst &RelocCall) {
+    // We are not interested in lowering dead instructions.
+    if (RelocCall.use_empty())
+      return;
     auto I = llvm::find(PendingGCRelocateCalls, &RelocCall);
     assert(I != PendingGCRelocateCalls.end() &&
            "Visited unexpected gcrelocate call");