Fixes:
* Unused import
* Redundant backslash
* Use of discouraged if not x in y
* Use of deprecated form of raising exceptions
Follow-up to PR #655 as requested by @gribozavr
This makes it clearer via their name what the two scripts are meant to
be used for.
As a recap:
1. pipeline_generator.py is meant for generating pass pipeline json
files.
2. pipelines_build_script.py is a script built ontop of
pipeline_generator.py that makes it easy to run build-script with
various pass pipelines that can be generated from
pipeline_generator.py. It is meant to be used on buildbots and for ones
own enjoyment as well.
Swift SVN r24315
The pipeline code still has too much hard coded. I am going to write a little
tool that is disabled by default that when run provides all this information
from the compiler. So the tool will dump out the current pass list, the normal optimization
pipelines, and then all of the passes used in such pipelines (i.e. AADumper is a
great pass but it won't change how the stdlib compiles). But for now I am going
to leave it hard coded.
Swift SVN r24313
Specifically the following utilities are provided:
1. Normal Pipeline.
2. Normal Pipeline with Specific Passes Disabled.
5. Normal Pipeline with specific PassLists disabled.
Swift SVN r24056
