[llvm-commits] [llvm] r112238 - /llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

[Devang Patel]

Author: dpatel
Date: Thu Aug 26 17:53:27 2010
New Revision: 112238

URL: http://llvm.org/viewvc/llvm-project?rev=112238&view=rev
Log:
If node is not available then use FuncInfo.ValueMap to emit debug info for byval parameter.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp?rev=112238&r1=112237&r2=112238&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp Thu Aug 26 17:53:27 2010
@@ -3947,7 +3947,7 @@
     return false;
 
   unsigned Reg = 0;
-  if (N.getOpcode() == ISD::CopyFromReg) {
+  if (N.getNode() && N.getOpcode() == ISD::CopyFromReg) {
     Reg = cast<RegisterSDNode>(N.getOperand(1))->getReg();
     if (Reg && TargetRegisterInfo::isVirtualRegister(Reg)) {
       MachineRegisterInfo &RegInfo = MF.getRegInfo();
@@ -4111,10 +4111,14 @@
         return 0;
       DAG.AddDbgValue(SDV, N.getNode(), isParameter);
     } else {
-      // This isn't useful, but it shows what we're missing.
-      SDV = DAG.getDbgValue(Variable, UndefValue::get(Address->getType()),
-                            0, dl, SDNodeOrder);
-      DAG.AddDbgValue(SDV, 0, isParameter);
+      // If Address is an arugment then try to emits its dbg value using
+      // virtual register info from the FuncInfo.ValueMap. Otherwise add undef
+      // to help track missing debug info.
+      if (!EmitFuncArgumentDbgValue(Address, Variable, 0, N)) {
+        SDV = DAG.getDbgValue(Variable, UndefValue::get(Address->getType()),
+                              0, dl, SDNodeOrder);
+        DAG.AddDbgValue(SDV, 0, isParameter);
+      }
     }
     return 0;
   }