The bug reducer makes assumptions about the layout of the swift build directory
that may not be true in non-Ninja builds. Two examples of cmake generators that
would cause problems are VisualStudio and Xcode. I do not have time right now to
add such support, hence the disabling of the test.
rdar://30311943
Currently it supports random bug finding and opt pipeline reduction. At some
point in the future it will support:
1. Reducing of optimizer crasher test cases.
2. Reducing optimizer miscompile test cases.
But those are for another time, this is just a first step. Patches welcome = ).
Check out llvm's bugpoint for inspiration.
It also has a basic test of pass pipeline reduction that is triggered via the
validation testing in lit. One thing to note here is that the tool right now
assumes darwin. This can be fixed in the future.
