[llvm-pdbdump] Don't fail on PDBs with no ID stream.

Older PDBs don't have this.  Its presence is detected by using
the various "feature" flags that come at the end of the PDB
Stream.  Detect this, and don't try to dump the ID stream if the
features tells us it's not present.

llvm-svn: 305235

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/tools/llvm-pdbutil/YAMLOutputStyle.cpp b/llvm/tools/llvm-pdbutil/YAMLOutputStyle.cpp
index 58c538d968c..4ab7cd39b29 100644
--- a/llvm/tools/llvm-pdbutil/YAMLOutputStyle.cpp
+++ b/llvm/tools/llvm-pdbutil/YAMLOutputStyle.cpp
@@ -293,6 +293,12 @@ Error YAMLOutputStyle::dumpIpiStream() {
   if (!opts::pdb2yaml::IpiStream)
     return Error::success();
 
+  auto InfoS = File.getPDBInfoStream();
+  if (!InfoS)
+    return InfoS.takeError();
+  if (!InfoS->containsIdStream())
+    return Error::success();
+
   auto IpiS = File.getPDBIpiStream();
   if (!IpiS)
     return IpiS.takeError();