[pdb] Re-add code to write PDB files.

Somehow all the functionality to write PDB files got removed,
probably accidentally when uploading the patch perhaps the wrong
one got uploaded.  This re-adds all the code, as well as the
corresponding test.

llvm-svn: 274248

1 files changed, 13 insertions, 0 deletions

diff --git a/llvm/test/DebugInfo/PDB/pdbdump-write.test b/llvm/test/DebugInfo/PDB/pdbdump-write.test
new file mode 100644
index 00000000000..46ee0ba10b6
--- /dev/null
+++ b/llvm/test/DebugInfo/PDB/pdbdump-write.test
@@ -0,0 +1,13 @@
+; This testcase checks to make sure that we can write PDB files.  It
+; works by first reading a known good PDB file and dumping the contents
+; to YAML.  Then it tries to reconstruct as much of the original PDB as
+; possible, although depending on what flags are specified when generating
+; the YAML, the PDB might be missing data required for any standard tool
+; to recognize it.  Finally, it dumps the same set of fields from the newly
+; constructed PDB to YAML, and verifies that the YAML is the same as the
+; original YAML generated from the good PDB.
+;
+; RUN: llvm-pdbdump pdb2yaml -stream-metadata -stream-directory %p/Inputs/empty.pdb > %t.1
+; RUN: llvm-pdbdump yaml2pdb -pdb=%t.2 %t.1
+; RUN: llvm-pdbdump pdb2yaml -stream-metadata -stream-directory %t.2 > %t.3
+; RUN: diff %t.1 %t.3