1 files changed, 8 insertions, 1 deletions
diff --git a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
index 939631cbde2..55aee261a6d 100644
--- a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
@@ -1645,8 +1645,15 @@ bool HexagonFrameLowering::expandStoreVec2(MachineBasicBlock &B,
   LivePhysRegs LPR(&HRI);
   LPR.addLiveIns(B);
   SmallVector<std::pair<unsigned, const MachineOperand*>,2> Clobbers;
-  for (auto R = B.begin(); R != It; ++R)
+  for (auto R = B.begin(); R != It; ++R) {
+    Clobbers.clear();
     LPR.stepForward(*R, Clobbers);
+    // Dead defs are recorded in Clobbers, but are not automatically removed
+    // from the live set.
+    for (auto &C : Clobbers)
+      if (C.second->isDead())
+        LPR.removeReg(C.first);
+  }
 
   DebugLoc DL = MI->getDebugLoc();
   unsigned SrcR = MI->getOperand(2).getReg();