Implement more or less proper user interaction.

llvm--emulator.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+
+"""
+Main module of the program.
+
+This module is the one that should be run, e.g.::
+
+    $ ./llvm--emulator.py
+
+"""
+
+import argparse
+
+import stepper
+import parser
+
+
+def main():
+    arg_parser = argparse.ArgumentParser(description='A hacky LLVM-- emulator/debugger')
+
+    arg_parser.add_argument('-a', '--auto',
+                            action='store', type=str, dest='auto_path',
+                            help='Automatically step through llvm in the given file')
+
+    parse_res_raw = arg_parser.parse_args()
+    parse_res = vars(parse_res_raw)
+
+    global llvm_parser
+    llvm_parser = parser.LLVMParser()
+    llvm_parser.build()
+
+    if parse_res['auto_path'] is not None:
+        go_auto(parse_res['auto_path'])
+    else:
+        enter_interactive_mode()
+
+
+def go_auto(path_to_file):
+    with open(path_to_file, 'r') as f:
+        file_contents = f.read()
+    print('Parsing {}'
+          .format(path_to_file))
+    ast = llvm_parser.parse(file_contents)
+    print('Beginning execution of {}'
+          .format(path_to_file))
+    stepper.auto_step(ast)
+
+
+def enter_interactive_mode():
+    print('TODO: Interactive mode has not been implemented yet. Sorry...')
+
+
+if __name__ == '__main__':
+    main()

stepper.py

@@ -1,8 +1,7 @@
-import ll
-import parser
-
 from enum import Enum
 
+import ll
+
 
 def TODO(msg):
     print('TODO: not implemented yet at {}'
@@ -549,33 +548,3 @@ def auto_step(ast, function_name='tigermain', function_args=[1234, 5678]):
                     break
             if stop_q in ['n', 'no']:
                 break
-
-
-def gogo():
-    p = parser.LLVMParser()
-    p.build()
-    data = r'''
-%T_tigermain = type { i64, i64, {i64, i64}, i64 }
-
-@G_str_111 = global { i64, [4 x i8] } {i64 4, [4 x i8] c"Hej\0A"}
-@G_str_999 = global { i64, [5 x i8] } {i64 5, [5 x i8] c"QRST\0A"}
-
-define i64 @tigermain (i64 %U_mainSL_8, i64 %U_mainDummy_9) {
-    %t = alloca %T_tigermain
-    %a = getelementptr %T_tigermain, %T_tigermain* %t, i32 0, i32 2, i32 1
-    store i64 9, i64* %a
-    %r = load i64, i64* %a
-    ret i64 %r
-}
-'''
-
-    print(data)
-    ast = p.parse(data)
-
-    auto_step(ast)
-    if True:
-        return
-
-
-if __name__ == '__main__':
-    gogo()