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

================
Comment at: clang/lib/Driver/Job.cpp:390-392
   Argv.push_back(nullptr);
+  Argv.pop_back(); // The terminating null element shall not be part of the
+                   // slice (main() behavior).
----------------
aganea wrote:
> aheejin wrote:
> > If we push `nullptr` and then pop it right after that, why do we push it in 
> > the first place?
> Simply to guarantee that we will have a `nullptr` element after the end of 
> the container. `.pop_back()` only decrements the size, the `nullptr` value 
> will remain there.
Frankly a better fix would be to change the API of `ExecuteCC1Tool` to take an 
`ArrayRef` and not rely on internal behavior of `SmallVector`. Maybe we should 
do that.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D116011/new/

https://reviews.llvm.org/D116011

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