ir_utils.mojo

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from compile import compile_info, get_linkage_name
from os import path
from reflection.location import call_location


@export
fn f(x: Int) -> Int:
  # print_val(x)
  return x + 1

fn main():
  dump_ir[f, "out"]()


@fieldwise_init
struct Setting(ImplicitlyCopyable):
  var kind: StaticString
  var ext: StaticString

comptime settings: List[Setting] = [
  {"llvm", "ll"},
  {"llvm-opt", "opt.ll"},
  {"asm", "s"},
]

@no_inline
fn dump_ir[Fn: __TypeOfAllTypes, //, f: Fn, name: StaticString = "out"]():
  """Dump IR for a function to a file."""
  print(get_linkage_name[f]())
  var dir = path.dirname(call_location[inline_count=0]().file_name)

  @parameter
  for s in settings:
    var ir = compile_info[f, emission_kind = s.kind]()
    print("-", full_path := path.join(dir, String(name, ".", s.ext)))
    try:
      with open(full_path, "w") as f:
        f.write(ir)
    except e:
      print("error:", e)

@no_inline
fn print_val[T: Writable, //](x: T):
  print(x)