llvm/test/tools/llvm-reduce/Inputs/llvm-dis-and-filecheck.py

   1 """
   2 Script to disassembles a bitcode file and run FileCheck on the output with the
   3 provided arguments. The first 2 arguments are the paths to the llvm-dis and
   4 FileCheck binaries, followed by arguments to be passed to FileCheck. The last
   5 argument is the bitcode file to disassemble.
   6
   7 Usage:
   8     python llvm-dis-and-filecheck.py
   9       <path to llvm-dis> <path to FileCheck>
  10       [arguments passed to FileCheck] <path to bitcode file>
  11
  12 """
  13
  14
  15 import sys
  16 import subprocess
  17
  18 llvm_dis = sys.argv[1]
  19 filecheck = sys.argv[2]
  20 filecheck_args = [filecheck, ]
  21 filecheck_args.extend(sys.argv[3:-1])
  22 bitcode_file = sys.argv[-1]
  23
  24 disassemble = subprocess.Popen([llvm_dis, "-o", "-", bitcode_file],
  25         stdout=subprocess.PIPE)
  26 check = subprocess.Popen(filecheck_args, stdin=disassemble.stdout)
  27 disassemble.stdout.close()
  28 check.communicate()
  29 sys.exit(check.returncode)