DebugInfo: Use the comp_dir of the referencing type units when building debug_line.dwo

This isn't a complete fix - it falls back to non-comp_dir when multiple
compile units are in play. Adding a map of comp_dir to table is part of
the more general solution, but I gave up (in the short term) when I
realized I'd also have to calculate the size of each type unit so as to
produce correct DW_AT_stmt_list attributes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204202 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/include/llvm/MC/MCDwarf.h b/include/llvm/MC/MCDwarf.h
index 508c8305bc..731ffb14fb 100644
--- a/include/llvm/MC/MCDwarf.h
+++ b/include/llvm/MC/MCDwarf.h
@@ -195,6 +195,9 @@ struct MCDwarfLineTableHeader {
 class MCDwarfDwoLineTable {
   MCDwarfLineTableHeader Header;
 public:
+  void setCompilationDir(StringRef CompilationDir) {
+    Header.CompilationDir = CompilationDir;
+  }
   unsigned getFile(StringRef Directory, StringRef FileName) {
     return Header.getFile(Directory, FileName);
   }