https://github.com/lambda7xx/Essentials-of-Compilation

https://iu.instructure.com/courses/1517577

http://github.com/jsiek/Essentials-of-Compilation #上面的是课程链接，努力学好这个project

Utility code, test suites, etc. for the compiler course.

This code will be described in the Appendix of the book.

The runtime.c file needs to be compiled and linked with the assembly code that your compiler produces. To compile runtime.c, do the following

   gcc -c -g -std=c99 runtime.c

This will produce a file named runtime.o. The -g flag is to tell the compiler to produce debug information that you may need to use the gdb (or lldb) debugger.

Next, suppose your compiler has translated the Racket program in file foo.rkt into the x86 assembly program in file foo.s (The .s filename extension is the standard one for assembly programs.) To produce an executable program, you can then do

  gcc -g runtime.o foo.s

which will produce the executable program named a.out.

There is an example "compiler" in the file compiler.rkt. That file defines two passes that translate R_0 programs to R_0 programs and tests them using the interp-tests function from utilities.rkt. It tests the passes on the three example programs in the tests subdirectory. You may find it amusing (I did!) to insert bugs in the compiler and see the errors reported. Note that interp-tests does not test the final output assembly code; you need to use compiler-tests for that purpose. The usage of compiler-tests is quite similar to interp-tests.