Post-commit feedback for d69c4372bf says the output
may vary between pass managers. This is hopefully a
quick fix, but we might want to investigate how to
better solve this type of problem.
The FileCheck lines in these files are auto-generated and complete,
so there's very little upside (less CHECK lines) from running
-instcombine on them and violating the expected test layering
(optimizer developers shouldn't have to be aware of clang tests).
Running opt passes like this makes it harder to make changes such as:
D93817
Sanjay Patel