message: Add --compiler switch to alloy.py
diff: @@ -571,7 +571,7 @@ def validation_run(only, only_targets, reference_branch, number, notify, update,
  stability.save_bin = False
  stability.random = False
  stability.ispc_flags = options.ispc_flags
  - stability.compiler_exe = None
  + stability.compiler_exe = options.compiler_exe
  stability.num_jobs = speed_number
  stability.verbose = False
  stability.time = time
  @@ -1041,6 +1041,8 @@ if __name__ == '__main__':
  "These options must be used with -r option.")
  run_group.add_option('--compare-with', dest='branch',
  help='set performance reference point. Default: main', default="main")
  + run_group.add_option('--compiler', dest='compiler_exe',
  + help='C/C++ compiler binary to use to run tests.', default=None)
  run_group.add_option('--ispc-flags', dest='ispc_flags',
  help='extra ispc flags.', default="")
  run_group.add_option('--number', dest='number_for_performance',
  