1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
index 9e56de732c58..85bbfabf5d3c 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -4438,6 +4438,12 @@ bool PPCInstrInfo::isDefMIElgibleForForwarding(MachineInstr &DefMI,
   if (Opc != PPC::ADDItocL8 && Opc != PPC::ADDI && Opc != PPC::ADDI8)
     return false;
 
+  // Skip the optimization of transformTo[NewImm|Imm]FormFedByAdd for ADDItocL8
+  // on AIX which is used for toc-data access. TODO: Follow up to see if it can
+  // apply for AIX toc-data as well.
+  if (Opc == PPC::ADDItocL8 && Subtarget.isAIX())
+    return false;
+
   assert(DefMI.getNumOperands() >= 3 &&
          "Add inst must have at least three operands");
   RegMO = &DefMI.getOperand(1);