Add argument --additional_compile_args (#1119)

This allows to pass more arguemnts to the IREE compiler
Example:
python my-app.py --additional_compile_args="--mlir-pretty-debuginfo --mlir-timing"

Co-authored-by: Boian Petkantchin <boian@nod-labs.com>

shark/iree_utils/compile_utils.py

@@ -300,6 +300,7 @@ def compile_module_to_flatbuffer(
     args += get_iree_common_args(debug=debug)
     args += get_model_specific_args()
     args += extra_args
+    args += shark_args.additional_compile_args
 
     if frontend in ["tensorflow", "tf"]:
         input_type = "auto"

shark/parser.py

@@ -14,8 +14,21 @@
 
 import argparse
 import os
+import shlex
 import subprocess
 
+
+class SplitStrToListAction(argparse.Action):
+    def __init__(self, option_strings, dest, *args, **kwargs):
+        super(SplitStrToListAction, self).__init__(
+            option_strings=option_strings, dest=dest, *args, **kwargs
+        )
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        del parser, option_string
+        setattr(namespace, self.dest, shlex.split(values[0]))
+
+
 parser = argparse.ArgumentParser(description="SHARK runner.")
 
 parser.add_argument(
@@ -24,6 +37,13 @@ parser.add_argument(
     default="cpu",
     help="Device on which shark_runner runs. options are cpu, cuda, and vulkan",
 )
+parser.add_argument(
+    "--additional_compile_args",
+    default=list(),
+    nargs=1,
+    action=SplitStrToListAction,
+    help="Additional arguments to pass to the compiler. These are appended as the last arguments.",
+)
 parser.add_argument(
     "--enable_tf32",
     type=bool,