bitcode2cpp.py

#!/usr/bin/python

import sys
import re
import subprocess
import platform
import os
import argparse

parser = argparse.ArgumentParser()
parser.add_argument("src", help="Source file to process")
parser.add_argument("runtime", help="Runtime", nargs='?', default='')
parser.add_argument("--llvm_as", help="Path to LLVM assembler executable", dest="path_to_llvm_as")
args = parser.parse_known_args()
src = args[0].src
length=0

target = re.sub(".*builtins/target-", "", src)
target = re.sub(r".*builtins\\target-", "", target)
target = re.sub(".*builtins/", "", target)
target = re.sub(r".*builtins\\", "", target)
target = re.sub("\.ll$", "", target)
target = re.sub("\.c$", "", target)
target = re.sub("-", "_", target)

llvm_as="llvm-as"
if args[0].path_to_llvm_as:
    llvm_as = args[0].path_to_llvm_as
else:
    if platform.system() == 'Windows' or platform.system().find("CYGWIN_NT") != -1:
        llvm_as = os.getenv("LLVM_INSTALL_DIR").replace("\\", "/") + "/bin/" + llvm_as

try:
    as_out=subprocess.Popen([llvm_as, "-", "-o", "-"], stdout=subprocess.PIPE)
except IOError:
    sys.stderr.write("Couldn't open " + src)
    sys.exit(1)

name = target
if args[0].runtime != '':
    name += "_" + args[0].runtime;
width = 16;
sys.stdout.write("extern const unsigned char builtins_bitcode_" + name + "[] = {\n")

data = as_out.stdout.read()
for i in range(0, len(data), 1):
        sys.stdout.write("0x%0.2X, " % ord(data[i:i+1]))

        if i%width == (width-1):
            sys.stdout.write("\n")

sys.stdout.write("0x00 };\n\n")
sys.stdout.write("int builtins_bitcode_" + name + "_length = " + str(len(data)) + ";\n")

as_out.wait()

sys.exit(as_out.returncode)