agozillon marked an inline comment as done.
agozillon added inline comments.


================
Comment at: flang/lib/Frontend/CompilerInvocation.cpp:730
+        res.getLangOpts().OMPHostIRFile = arg->getValue();
+        if (!llvm::sys::fs::exists(res.getLangOpts().OMPHostIRFile))
+          diags.Report(clang::diag::err_drv_omp_host_ir_file_not_found)
----------------
awarzynski wrote:
> agozillon wrote:
> > awarzynski wrote:
> > > I think that this is expecting a bit too much from `CompilerInvocation`. 
> > > Instead, whatever is going to use this file should complain if the file 
> > > does not exist (`CompilerInvocation` is merely a messenger here, and file 
> > > I/O can be quite expensive, hence my reservations).
> > > 
> > > Is it possible to create a test for "invalid file path" wherever this 
> > > becomes relevant? 
> > I believe the follow up patch I have here which uses the file, emits an 
> > error if it can't find it: https://reviews.llvm.org/D148370 
> > However, in this case it's an assert rather than more useful Diagnostics 
> > unfortunately. 
> > 
> > Although, this segment of code does currently just mimic what Clang does in 
> > it's own 
> > `CompilerInvocation`: 
> > https://github.com/llvm/llvm-project/blob/main/clang/lib/Frontend/CompilerInvocation.cpp#L3883
> >  
> > 
> > So it depends if we wish to try to maintain the status quo for the shared 
> > argument across the compiler frontends! 
> > 
> > So whichever you prefer, I am happy to remove the check at this level and 
> > let the lowering handle the problem if it arises :-) but I do like sharing 
> > the commonality with Clang where possible.
> Consistency with Clang is a good idea 👍🏻  Though I would appreciate a test 
> that demonstrates that this diagnostic is indeed issues when a non-existing 
> files is specified :)
Thank you for pointing out a test was required! I've added one now :-)


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D148038/new/

https://reviews.llvm.org/D148038

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