Revert this. It was breaking stuff.

llvm-svn: 64428

1 files changed, 31 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 8cba55fdb0f..e5a30c88be1 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -1274,9 +1274,38 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
     switch (TLI.getOperationAction(ISD::DBG_STOPPOINT, MVT::Other)) {
     case TargetLowering::Promote:
     default: assert(0 && "This action is not supported yet!");
-    case TargetLowering::Expand:
-      Result = Tmp1;  // chain
+    case TargetLowering::Expand: {
+      DwarfWriter *DW = DAG.getDwarfWriter();
+      bool useDEBUG_LOC = TLI.isOperationLegalOrCustom(ISD::DEBUG_LOC,
+                                                       MVT::Other);
+      bool useLABEL = TLI.isOperationLegalOrCustom(ISD::DBG_LABEL, MVT::Other);
+      
+      const DbgStopPointSDNode *DSP = cast<DbgStopPointSDNode>(Node);
+      GlobalVariable *CU_GV = cast<GlobalVariable>(DSP->getCompileUnit());
+      if (DW && (useDEBUG_LOC || useLABEL) && !CU_GV->isDeclaration()) {
+        DICompileUnit CU(cast<GlobalVariable>(DSP->getCompileUnit()));
+        unsigned SrcFile = DW->RecordSource(CU.getDirectory(),
+                                            CU.getFilename());
+        
+        unsigned Line = DSP->getLine();
+        unsigned Col = DSP->getColumn();
+        
+        // A bit self-referential to have DebugLoc on Debug_Loc nodes, but
+        // it won't hurt anything.
+        if (useDEBUG_LOC) {
+          SDValue Ops[] = { Tmp1, DAG.getConstant(Line, MVT::i32),
+                              DAG.getConstant(Col, MVT::i32),
+                              DAG.getConstant(SrcFile, MVT::i32) };
+          Result = DAG.getNode(ISD::DEBUG_LOC, dl, MVT::Other, Ops, 4);
+        } else {
+          unsigned ID = DW->RecordSourceLine(Line, Col, SrcFile);
+          Result = DAG.getLabel(ISD::DBG_LABEL, dl, Tmp1, ID);
+        }
+      } else {
+        Result = Tmp1;  // chain
+      }
       break;
+    }
     case TargetLowering::Legal: {
       LegalizeAction Action = getTypeAction(Node->getOperand(1).getValueType());
       if (Action == Legal && Tmp1 == Node->getOperand(0))