[Bug other/112650] New: RISC-V parameters are not documented

[Bug other/112650] New: RISC-V parameters are not documented

[jeremy.bennett at embecosm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112650

            Bug ID: 112650
           Summary: RISC-V parameters are not documented
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jeremy.bennett at embecosm dot com
  Target Milestone: ---

GCC for RISC-V defines several parameters to control compilation:
- riscv-strcmp-inline-limit
- riscv-autovec-preference
- riscv-autovec-lmul
- riscv-vector-abi

The last of these is commented as an undocumented experimental switch in
riscv.opt

None of these parameters are included in the user manual (specifically in the
"RISC-V Options" section of invoke.texi).  While parameters often relate to
internal interfaces, and hence are unstable, they are still available to the
user, and should be documented accordingly.

The "Arm Options" section includes a good reference for such documentation,
including warning about the unstable nature of parameters.