add test

Author: Jinjie-Huang

bolt/lib/Core/BinaryContext.cpp

@@ -1727,11 +1727,12 @@ void BinaryContext::preprocessDebugInfo() {
   StringRef GlobalPrefix = AsmInfo->getPrivateGlobalPrefix();
   for (const std::unique_ptr<DWARFUnit> &CU : DwCtx->compile_units()) {
     const uint64_t CUID = CU->getOffset();
+    std::optional<uint64_t> DWOID = CU->getDWOId();
     DwarfLineTable &BinaryLineTable = getDwarfLineTable(CUID);
     BinaryLineTable.setLabel(Ctx->getOrCreateSymbol(
         GlobalPrefix + "line_table_start" + Twine(CUID)));
 
-    if (!ProcessedCUs.count(CU.get()))
+    if (!ProcessedCUs.count(CU.get()) || (DWOID && *DWOID == 0))
       continue;
 
     const DWARFDebugLine::LineTable *LineTable =
@@ -1746,7 +1747,7 @@ void BinaryContext::preprocessDebugInfo() {
         Checksum = LineTable->Prologue.FileNames[0].Checksum;
       std::optional<const char *> Name =
           dwarf::toString(CU->getUnitDIE().find(dwarf::DW_AT_name), nullptr);
-      if (std::optional<uint64_t> DWOID = CU->getDWOId()) {
+      if (DWOID) {
         auto Iter = DWOCUs.find(*DWOID);
         if (Iter == DWOCUs.end()) {
           this->errs() << "BOLT-ERROR: DWO CU was not found for " << Name

bolt/test/X86/dwarf5-dwoid-zero.test

@@ -1,7 +1,6 @@
 # RUN: rm -rf %t && mkdir -p %t
 # RUN: %clang -O3 -g -gdwarf-5 -gsplit-dwarf -Wl,-q %p/Inputs/thinlto-split-dwarf-inlining.s -o %t/main.exe
-# RUN: llvm-bolt %t/main.exe -o %t/main.exe.bolt -update-debug-sections -comp-dir-override="./" 2>&1 | FileCheck %s
+# RUN: llvm-bolt %t/main.exe -o %t/main.exe.bolt -update-debug-sections -comp-dir-override="%t" 2>&1 | FileCheck %s
 
 # CHECK-NOT: Assertion `RangeListsWritersByCU.count(*DWOId) == 0 && "RangeLists writer for DWO unit already exists."'
 # CHECK: BOLT-WARNING: Found DWO file of ID 0:
-