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 os
  17 import subprocess
  18
  19 llvm_dis = sys.argv[1]
  20 filecheck = sys.argv[2]
  21 filecheck_args = [
  22     filecheck,
  23 ]
  24 filecheck_args.extend(sys.argv[3:-1])
  25 bitcode_file = sys.argv[-1]
  26 ir_file = bitcode_file + ".ll"
  27
  28 disassemble = subprocess.Popen([llvm_dis, "--preserve-ll-uselistorder", "-o", ir_file, bitcode_file])
  29 if os.path.exists(ir_file + ".0"):
  30     ir_file = ir_file + ".0"
  31
  32 disassemble.communicate()
  33
  34 if disassemble.returncode != 0:
  35     print("stderr:")
  36     print(disassemble.stderr)
  37     print("stdout:")
  38     print(disassemble.stdout)
  39     sys.exit(1)
  40
  41 check = None
  42 with open(ir_file, "r") as ir:
  43     check = subprocess.Popen(filecheck_args, stdin=ir, stdout=sys.stdout)
  44 check.communicate()
  45 sys.exit(check.returncode)