- dead assignments (int x = 5; x = bla(); -> dead assignment at x = 5;)
- catch the if(k = b) cases, maybe require all assignments to be in parentheses
(but some few exceptions like toplevel, nested assignments)
+ - warn when folding shift constants with too large shift amounts
main/driver:
- delete output file if we had an error
+- go through gcc manual and emulate all the gcc flags...