import subprocess | |
import sys | |
opt = subprocess.run( [ 'opt', '-passes=print<loops>','-disable-output', sys.argv[1]], stdout=subprocess.PIPE, stderr=subprocess.PIPE ) | |
stdout = opt.stdout.decode() | |
pattern = 'Loop at depth 1 containing' | |
if (pattern in opt.stderr.decode()): | |
print('This is interesting!') | |
sys.exit(0) | |
else: | |
print('This is NOT interesting!') | |
sys.exit(1) |