[all-commits] [llvm/llvm-project] cb3fd7: Reland rG4fcd1a8e6528:[llvm-exegesis] Add option ...

[Vy Nguyen via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: cb3fd715f324ff0f58dfeb7d08a88a05477cb0d5
      https://github.com/llvm/llvm-project/commit/cb3fd715f324ff0f58dfeb7d08a88a05477cb0d5
  Author: Vy Nguyen <vyng at google.com>
  Date:   2020-10-01 (Thu, 01 Oct 2020)

  Changed paths:
    M llvm/test/tools/llvm-exegesis/X86/lbr/lit.local.cfg
    M llvm/tools/llvm-exegesis/lib/Target.h
    M llvm/tools/llvm-exegesis/lib/X86/Target.cpp
    M llvm/tools/llvm-exegesis/lib/X86/X86Counter.cpp
    M llvm/tools/llvm-exegesis/lib/X86/X86Counter.h
    M llvm/tools/llvm-exegesis/llvm-exegesis.cpp

  Log Message:
  -----------
  Reland  rG4fcd1a8e6528:[llvm-exegesis] Add option to check the hardware support for a given feature before benchmarking.

This is mostly for the benefit of the LBR latency mode.
Right now, it performs no checking. If this is run on non-supported hardware, it will produce all zeroes for latency.

      Differential Revision: https://reviews.llvm.org/D85254

New change: Updated lit.local.cfg to use pass the right argument to llvm-exegesis to actually request the LBR mode.

Differential Revision: https://reviews.llvm.org/D88670