Modify pnacl subzero to be able to read pnacl bitcode files.
BUG=None
R=jfb@chromium.org, stichnot@chromium.org
Review URL: https://codereview.chromium.org/277033003
diff --git a/llvm2iceinsts.py b/llvm2iceinsts.py
new file mode 100755
index 0000000..b04505f
--- /dev/null
+++ b/llvm2iceinsts.py
@@ -0,0 +1,68 @@
+#!/usr/bin/env python2
+
+import argparse
+import itertools
+import os
+import re
+import subprocess
+import sys
+
+for p in sys.path:
+ if p.endswith('/toolchain_build/src/pnacl-subzero'):
+ sys.path.insert(0, p + '/pydir')
+ break
+
+from utils import shellcmd
+
+if __name__ == '__main__':
+ desc = 'Run llvm2ice on llvm file to produce ICE instructions.'
+ argparser = argparse.ArgumentParser(
+ description=desc,
+ formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+ epilog='''
+ Runs in two modes, depending on whether the flag '--pnacl' is specified.
+
+ If flag '--pnacl' is omitted, it runs llvm2ice to (directly) generate
+ the corresponding ICE instructions.
+
+ If flag '--pnacl' is given, it first assembles and freezes the
+ llvm source file generating the corresponding PNaCl bitcode
+ file. The PNaCl bitcode file is then piped into llvm2ice to
+ generate the corresponding ICE instructions.
+ ''')
+ argparser.add_argument(
+ '--llvm2ice', required=False, default='./llvm2ice', metavar='LLVM2ICE',
+ help='Path to llvm2ice driver program')
+ argparser.add_argument('--llvm-bin-path', required=False,
+ default=None, metavar='LLVM_BIN_PATH',
+ help='Path to LLVM executables ' +
+ '(for building PNaCl files)')
+ argparser.add_argument('--pnacl', required=False,
+ action='store_true',
+ help='Convert llvm source to PNaCl bitcode ' +
+ 'file first')
+ argparser.add_argument('--echo-cmd', required=False,
+ action='store_true',
+ help='Trace command that generates ICE instructions')
+ argparser.add_argument('llfile', nargs=1,
+ metavar='LLVM_FILE',
+ help='Llvm source file')
+
+ args = argparser.parse_args()
+ llvm_bin_path = args.llvm_bin_path
+ llfile = args.llfile[0]
+
+ cmd = []
+ if args.pnacl:
+ cmd = [os.path.join(llvm_bin_path, 'llvm-as'), llfile, '-o', '-', '|',
+ os.path.join(llvm_bin_path, 'pnacl-freeze'),
+ '--allow-local-symbol-tables', '|']
+ cmd += [args.llvm2ice, '-verbose', 'inst', '-notranslate']
+ if args.pnacl:
+ cmd += ['--allow-local-symbol-tables', '--bitcode-format=pnacl']
+ else:
+ cmd.append(llfile)
+
+ stdout_result = shellcmd(cmd, echo=args.echo_cmd)
+ if not args.echo_cmd:
+ sys.stdout.write(stdout_result)
