[yaml2obj] - Don't crash on invalid inputs.

yaml2obj might crash on invalid input when unable to parse the YAML.

Recently a crash with a very similar nature was fixed for an empty files. 
This patch revisits the fix and does it in yaml::Input instead.
It seems to be more correct way to handle such situation.

With that crash for invalid inputs is also fixed now.

Differential revision: https://reviews.llvm.org/D61059

llvm-svn: 359178

1 files changed, 1 insertions, 5 deletions

diff --git a/llvm/tools/yaml2obj/yaml2obj.cpp b/llvm/tools/yaml2obj/yaml2obj.cpp
index ef35458a8f0..f2266401da7 100644
--- a/llvm/tools/yaml2obj/yaml2obj.cpp
+++ b/llvm/tools/yaml2obj/yaml2obj.cpp
@@ -86,11 +86,7 @@ int main(int argc, char **argv) {
   if (!Buf)
     return 1;
 
-  StringRef Buffer = Buf.get()->getBuffer();
-  if (Buffer.trim().size() == 0)
-    error("yaml2obj: Error opening '" + Input + "': Empty File.");
-  yaml::Input YIn(Buffer);
-
+  yaml::Input YIn(Buf.get()->getBuffer());
   int Res = convertYAML(YIn, Out->os());
   if (Res == 0)
     Out->keep();