Revert r70803 for now, it causes a regression.

llvm-svn: 70811

llvm/lib/CodeGen/AsmPrinter/DwarfWriter.cpp

@@ -3262,6 +3262,13 @@ public:
     // Assumes in correct section after the entry point.
     EmitLabel("func_begin", ++SubprogramCount);
 
+    // Emit label for the implicitly defined dbg.stoppoint at the start of
+    // the function.
+    if (!Lines.empty()) {
+      const SrcLineInfo &LineInfo = Lines[0];
+      Asm->printLabel(LineInfo.getLabelID());
+    }
+
     if (TimePassesIsEnabled)
       DebugTimer->stopTimer();
   }

llvm/lib/CodeGen/SelectionDAG/FastISel.cpp

@@ -333,6 +333,11 @@ bool FastISel::SelectCall(User *I) {
       unsigned Col = SPI->getColumn();
       unsigned Idx = MF.getOrCreateDebugLocID(CU.getGV(), Line, Col);
       setCurDebugLoc(DebugLoc::get(Idx));
+      if (DW && DW->ShouldEmitDwarfDebug()) {
+        unsigned ID = DW->RecordSourceLine(Line, Col, CU);
+        const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
+        BuildMI(MBB, DL, II).addImm(ID);
+      }
     }
     return true;
   }
@@ -397,7 +402,7 @@ bool FastISel::SelectCall(User *I) {
                                               CompileUnit.getGV(), Line, 0)));
 
       if (DW && DW->ShouldEmitDwarfDebug()) {
-        unsigned LabelID = MMI->NextLabelID();
+        unsigned LabelID = DW->RecordSourceLine(Line, 0, CompileUnit);
         const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
         BuildMI(MBB, DL, II).addImm(LabelID);
         DebugLocTuple PrevLocTpl = MF.getDebugLocTuple(PrevLoc);
@@ -412,6 +417,7 @@ bool FastISel::SelectCall(User *I) {
       setCurDebugLoc(DebugLoc::get(MF.getOrCreateDebugLocID(
                                               CompileUnit.getGV(), Line, 0)));
       if (DW && DW->ShouldEmitDwarfDebug()) {
+        DW->RecordSourceLine(Line, 0, CompileUnit);
         // llvm.dbg.func_start also defines beginning of function scope.
         DW->RecordRegionStart(cast<GlobalVariable>(FSI->getSubprogram()));
       }

llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp

@@ -3980,7 +3980,7 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
                      MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
 
         if (DW && DW->ShouldEmitDwarfDebug()) {
-          unsigned LabelID = DAG.getMachineModuleInfo()->NextLabelID();
+          unsigned LabelID = DW->RecordSourceLine(Line, 0, CompileUnit);
           DAG.setRoot(DAG.getLabel(ISD::DBG_LABEL, getCurDebugLoc(),
                                    getRoot(), LabelID));
           DebugLocTuple PrevLocTpl = MF.getDebugLocTuple(PrevLoc);
@@ -3995,6 +3995,7 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
         setCurDebugLoc(DebugLoc::get(
                      MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
         if (DW && DW->ShouldEmitDwarfDebug()) {
+          DW->RecordSourceLine(Line, 0, CompileUnit);
           // llvm.dbg.func_start also defines beginning of function scope.
           DW->RecordRegionStart(cast<GlobalVariable>(FSI.getSubprogram()));
         }

llvm/test/DebugInfo/2009-01-29-HeaderLocation.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc | grep "\\"m.h\\"" | count 1
+; RUN: llvm-as < %s | llc | grep "m.h" | count 1
 target triple = "i386-apple-darwin9.6"
 	%llvm.dbg.anchor.type = type { i32, i32 }
 	%llvm.dbg.basictype.type = type { i32, { }*, i8*, { }*, i32, i64, i64, i64, i32, i32 }

llvm/utils/TableGen/AsmWriterEmitter.cpp

@@ -650,12 +650,12 @@ void AsmWriterEmitter::run(std::ostream &O) {
   O << "\";\n\n";
 
   O << "  if (TAI->doesSupportDebugInformation() &&\n"
-    << "      DW->ShouldEmitDwarfDebug()) {\n"
+    << "      DW->ShouldEmitDwarfDebug() && OptLevel != CodeGenOpt::None) {\n"
     << "    DebugLoc CurDL = MI->getDebugLoc();\n\n"
     << "    if (!CurDL.isUnknown()) {\n"
     << "      static DebugLocTuple PrevDLT(0, ~0U, ~0U);\n"
     << "      DebugLocTuple CurDLT = MF->getDebugLocTuple(CurDL);\n\n"
-    << "      if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)\n"
+    << "      if (PrevDLT.CompileUnit != 0 && PrevDLT != CurDLT)\n"
     << "        printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,\n"
     << "                               DICompileUnit(CurDLT.CompileUnit)));\n\n"
     << "      PrevDLT = CurDLT;\n"