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ll-strip.py
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61 lines (55 loc) · 1.74 KB
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#!/usr/bin/python3
# Copyright 2017 The Emscripten Authors. All rights reserved.
# Emscripten is available under two separate licenses, the MIT license and the
# University of Illinois/NCSA Open Source License. Both these licenses can be
# found in the LICENSE file.
from __future__ import print_function
import sys, re
def print_usage():
print("Usage: ll-strip.py file from to", file=sys.stderr)
print("\tStrip function bodies in all ll file in the [from, to] range", file=sys.stderr)
sys.exit(1)
try:
range_from = int(sys.argv[2])
range_to = int(sys.argv[3])
if range_from >= range_to:
raise Exception("error")
file = open(sys.argv[1])
except:
print_usage()
func_start = re.compile(r"^define\s")
func_end = re.compile("^}$")
function_counter = 0
in_function = False
line_number = 0
skip = False
dummy_stmt = "unreachable"
for orig_line in file:
line = orig_line.strip()
if func_start.match(line):
if in_function:
print("Discovered a function inside another function!", file=sys.stderr)
sys.exit(1)
in_function = True
line_number = 0
skip = False
function_counter = function_counter + 1
elif func_end.match(line):
if not in_function:
print("Discovered a function end without a matching beginning!", file=sys.stderr)
sys.exit(1)
in_function = False
line_number = 0
skip = False
elif in_function:
line_number = line_number + 1
if not skip and line_number == 1:
if line == dummy_stmt:
function_counter = function_counter - 1
if range_from <= function_counter <= range_to and line_number == 1:
#import pdb;pdb.set_trace()
if line != dummy_stmt:
skip = True
print(dummy_stmt)
if not skip:
print(orig_line.rstrip("\n"))