[all-commits] [llvm/llvm-project] 948be8: [llvm-readobj] Remove legacy GNU_PROPERTY_X86_ISA_...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 948be862d6dde3ae5ebf3983f78ec2eee5422ed1
      https://github.com/llvm/llvm-project/commit/948be862d6dde3ae5ebf3983f78ec2eee5422ed1
  Author: Fangrui Song <i at maskray.me>
  Date:   2021-03-19 (Fri, 19 Mar 2021)

  Changed paths:
    M llvm/include/llvm/BinaryFormat/ELF.h
    M llvm/test/tools/llvm-readobj/ELF/note-gnu-property.s
    M llvm/tools/llvm-readobj/ELFDumper.cpp

  Log Message:
  -----------
  [llvm-readobj] Remove legacy GNU_PROPERTY_X86_ISA_1_{NEEDED,USED} and dump new GNU_PROPERTY_X86_ISA_1_{NEEDED,USED}

https://sourceware.org/bugzilla/show_bug.cgi?id=26703 deprecated the
previous GNU_PROPERTY_X86_ISA_1_{CMOV,SSE,*} values (renamed to `COMPAT`)
and added new values.

Since the legacy values are not used by compilers, having dumping support in
llvm-readobj is unnecessary. So just drop the legacy feature.

The new values are used by GCC 11
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97250) `-march=x86-64-v[234]` to
indicate the micro-architecture ISA levels.

Differential Revision: https://reviews.llvm.org/D98818