The commit https://reviews.llvm.org/rG14fc20ca6 added some options to the X86 back end that cause the help text for opt/llc to become much harder to read. The issue is that the cl::value_desc is part of the option name and is used to compute the indentation of the description text (i.e. the maximum length option name is what everything aligns to). Since the commit puts a large number of characters into that text, everything is aligned to that width.
This patch just reformats the option so that the description is contained in the description and the list of possible values is within the angle brackets:
--x86-align-branch=<jcc, fused, jmp, call, ret, indirect> - Specify types of branches to align (plus separated list of types): jcc indicates conditional jumps fused indicates fusedconditional jumps jmp indicates unconditional jumps call indicates direct and indirect calls ret indicates rets indirect indicates indirect jumps