Avoid emitting a dbg_value machineinstr that's not going to be inserted into entry...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102581 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 254a6543ffd66834405fd21875b295303e6db7c6..cb933d7cdd5151b3248a87bf84ff9c419aeaeefd 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3709,6 +3709,8 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const DbgValueInst &DI,
 
   if (!Reg)
     Reg = FuncInfo.ValueMap[V];
+  if (!Reg)
+    return;
 
   const TargetInstrInfo *TII = DAG.getTarget().getInstrInfo();
   MachineInstrBuilder MIB = BuildMI(MF, getCurDebugLoc(),

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 88245de01304758279a3e8fe7dd70a2951c267e1..adb321d929cfecf3faedfa64d47677efe74172a7 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -222,8 +222,6 @@ bool SelectionDAGISel::runOnMachineFunction(MachineFunction &mf) {
   for (unsigned i = 0, e = FuncInfo->ArgDbgValues.size(); i != e; ++i) {
     MachineInstr *MI = FuncInfo->ArgDbgValues[e-i-1];
     unsigned Reg = MI->getOperand(0).getReg();
-    if (!Reg)
-      continue;
     if (TargetRegisterInfo::isPhysicalRegister(Reg))
       EntryMBB->insert(EntryMBB->begin(), MI);
     else {