If the operand is marked M_OPTIONAL_DEF_OPERAND, then it's a def.
llvm-svn: 38496
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
index a1cb244..2252e7d 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
@@ -323,7 +323,10 @@
// Get/emit the operand.
unsigned VReg = getVR(Op, VRBaseMap);
- MI->addRegOperand(VReg, false);
+ const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
+ bool isOptDef = (IIOpNum < TID->numOperands)
+ ? (TID->OpInfo[IIOpNum].Flags & M_OPTIONAL_DEF_OPERAND) : false;
+ MI->addRegOperand(VReg, isOptDef);
// Verify that it is right.
assert(MRegisterInfo::isVirtualRegister(VReg) && "Not a vreg?");