Revert r300746 (SCEV analysis for or instructions).

There have been multiple reports of this causing problems: a
compile-time explosion on the LLVM testsuite, and a stack
overflow for an opencl kernel.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300928 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed