[all-commits] [llvm/llvm-project] fd13d7: Re-land "[llvm-exegesis] Save target state before ...

[Clement Courbet via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: fd13d7ce09af2bcad6976b8f5207874992bdd908
      https://github.com/llvm/llvm-project/commit/fd13d7ce09af2bcad6976b8f5207874992bdd908
  Author: Clement Courbet <courbet at google.com>
  Date:   2020-11-04 (Wed, 04 Nov 2020)

  Changed paths:
    A llvm/test/tools/llvm-exegesis/X86/uops-FLDENVm.s
    M llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp
    M llvm/tools/llvm-exegesis/lib/Target.cpp
    M llvm/tools/llvm-exegesis/lib/Target.h
    M llvm/tools/llvm-exegesis/lib/X86/Target.cpp

  Log Message:
  -----------
  Re-land "[llvm-exegesis] Save target state before running the benchmark.

Use `__builtin_ia32_fxsave64` under __GNUC__, (_fxsave64) does not exist in old versions of
gcc (pre-9.1).

This reverts commit e128f9cafca4e72b089fcd1381af5a1ec656d987.