commit 9c5861fdbd5e30df55cb7cd9a0edda8d92494100
author Manman Ren <mren@apple.com> Wed Feb 06 00:59:41 2013 +0000
committer Manman Ren <mren@apple.com> Wed Feb 06 00:59:41 2013 +0000
tree 6d2a82a2e469056c4350a55c1081575c597bb99a
parent ba42625074aa7f4f1324a5d6666bd0e302b57f2b

Attempt to recover gdb bot after r174445.

Failure: undefined symbol 'Lline_table_start0'.
Root-cause: we use a symbol subtraction to calculate at_stmt_list, but
the line table entries are not dumped in the assembly.
Fix: use zero instead of a symbol subtraction for Compile Unit 0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174479 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/DwarfDebug.cpp

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index dcaab31..3409490 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -674,6 +674,8 @@
   if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
     NewCU->addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
                     LineTableStartSym);
+  else if (NewCU->getUniqueID() == 0)
+    NewCU->addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
   else
     NewCU->addDelta(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
                     LineTableStartSym, Asm->GetTempSymbol("section_line"));