alyssarosenzweig / scratch-llvm Goto Github PK

Hello,

I have forked the github project and want to improve the code but there is a lot there and it's difficult to figure out how it works. Do you think you could explain in detail the code, especially backend.js and IR.js, so i could know what's happening here.

I want to remake the way the script runs so that instead of doing all this putchar, putnum and stacks stuff, it just adds the closest scratch equivalent of the input functions. Is this possible to do and what parts do I need to change to make this happen. I'd prefer to modify your project rather than starting from scratch as you've already done a considerable amount of the work.

Edit: Actually, perhaps I don't need an llvm if my aim isn't to convert to machine code but is to simply parse c and convert to scratch json, it might be better to keep the natural human readable code.

I do in Bash in Ubuntu 14.04:

clang -S -emit-llvm tests/fizzbuzz.c
node meowcc.js fizzbuzz.ll > project.json
zip fizzbuzz.sb2 project.json

And then I upload fizzbuzz.sb2 to Scratch, but then the program only prints fizzbuzz everytime, as if conditions where always true. I have tested this in Ubuntu 14.04 and Raspbian Wheezy, but with the same wrong results. What version of clang do you use? Is there a way to get this to work in e.g. Ubuntu? Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4).

I also have to change 'void main' to 'int main' in all examples.

Simpler examples such as helloworld.c works without problems.