[all-commits] [llvm/llvm-project] 1fdbe5: [clang][PPC] Checking Unknown Values Passed to -mcpu

[Qiongsi Wu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1fdbe5c573b920f00e5bfdbcea0e837833ae77a0
      https://github.com/llvm/llvm-project/commit/1fdbe5c573b920f00e5bfdbcea0e837833ae77a0
  Author: Qiongsi Wu <qiongsiwu at gmail.com>
  Date:   2022-12-13 (Tue, 13 Dec 2022)

  Changed paths:
    M clang/lib/Driver/ToolChains/Arch/PPC.cpp
    M clang/lib/Driver/ToolChains/Arch/PPC.h
    M clang/lib/Driver/ToolChains/CommonArgs.cpp
    M clang/test/Driver/ppc-cpus.c

  Log Message:
  -----------
  [clang][PPC] Checking Unknown Values Passed to -mcpu

Currently `ppc::getPPCTargetCPU` returns an empty string when it encounters an unknown value passed to `-mcpu`. This causes `clang` to ignore unknown `-mcpu` values silently.

This patch changes the behaviour of `ppc::getPPCTargetCPU` so that it passes the unknown option to the target info, so the target info can actually check if the CPU string is supported, and report an error when encountering unknown/unsupported CPU string.

Reviewed By: jamieschmeiser

Differential Revision: https://reviews.llvm.org/D139720