[llvm-pdbdump] Resubmit "Add some tests for llvm-pdbdump".

NOTE: This patch intentionally breaks the build.  It attempts
to resubmit r230083, but with some debug logging in the CMake
and lit config files to determine why certain bots do not
correctly disable the DIA tests when DIA is not available.

After a sufficient number of bots fail, this patch will either
be reverted or, if the cause of the failure becomes obvious,
a fix submitted with the log statements removed.

llvm-svn: 230161

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/test/DebugInfo/PDB/Inputs/empty.cpp b/llvm/test/DebugInfo/PDB/Inputs/empty.cpp
new file mode 100644
index 00000000000..6021aca7bfc
--- /dev/null
+++ b/llvm/test/DebugInfo/PDB/Inputs/empty.cpp
@@ -0,0 +1,7 @@
+// Build with "cl.exe /Zi empty.cpp /link /debug /nodefaultlib /entry:main"
+
+void *__purecall = 0;
+
+int main() {
+  return 42;
+}