richard.barton.arm added a comment.

Another random thought that just came to me: what does the new driver do when 
you invoke it with no input files or options? I could imagine a few sensible 
outcomes (error: no input (clang and gcc/gfortran behaviour), print version and 
exit, print help and exit, etc.) and I don't have a strong preference over 
which we chose here but I think there should be a test for it in test/Driver


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D86089/new/

https://reviews.llvm.org/D86089

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