1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp b/llvm/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
index ce271141bbf..a896700df1b 100644
--- a/llvm/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
@@ -1112,6 +1112,10 @@ static bool cannotCoexistAsymm(const MachineInstr &MI, const MachineInstr &MJ,
     return MJ.isInlineAsm() || MJ.isBranch() || MJ.isBarrier() ||
            MJ.isCall() || MJ.isTerminator();
 
+  // New-value stores cannot coexist with any other stores.
+  if (HII.isNewValueStore(MI) && MJ.mayStore())
+    return true;
+
   switch (MI.getOpcode()) {
   case Hexagon::S2_storew_locked:
   case Hexagon::S4_stored_locked:
@@ -1654,6 +1658,9 @@ bool HexagonPacketizerList::isLegalToPruneDependencies(SUnit *SUI, SUnit *SUJ) {
     return false;
   }
 
+  if (!Coexist)
+    return false;
+
   if (ChangedOffset == INT64_MAX && updateOffset(SUI, SUJ)) {
     FoundSequentialDependence = false;
     Dependence = false;