[all-commits] [llvm/llvm-project] ab7abd: [Driver] Add support for -msve-vector-bits=scalable.

[paulwalker-arm via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ab7abd8bf41b558aef402a21c637211760bc2739
      https://github.com/llvm/llvm-project/commit/ab7abd8bf41b558aef402a21c637211760bc2739
  Author: Paul Walker <paul.walker at arm.com>
  Date:   2020-07-20 (Mon, 20 Jul 2020)

  Changed paths:
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/include/clang/Driver/Options.td
    M clang/lib/Driver/ToolChains/Arch/AArch64.cpp
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/test/Driver/aarch64-sve-vector-bits.c

  Log Message:
  -----------
  [Driver] Add support for -msve-vector-bits=scalable.

No real action is taken for a value of scalable but it provides a
route to disable an earlier specification and is effectively its
default value when omitted.

Patch also removes an "unused variable" warning.

Differential Revision: https://reviews.llvm.org/D84021