Compiling and running LLVM IR code on your machine

[bhermann]

Since I've been caught a little bit off-guard on this issue in the lecture, here are some pointers to actually make something meaningful with (transformed) programs in LLVM IR bitcode.

If you want to compile down an executable ELF file:

Code: Alles auswählen

llvm@68e3b3fbd8a7:~/examples$ clang -c -emit-llvm test.c
llvm@68e3b3fbd8a7:~/examples$ llc-3.6 test.bc
llvm@68e3b3fbd8a7:~/examples$ gcc test.s -o test
llvm@68e3b3fbd8a7:~/examples$ ./test 2 2
2

You can also interpret the LLVM bitcode on the fly:

Code: Alles auswählen

llvm@68e3b3fbd8a7:~/examples$ clang -c -emit-llvm test.c
llvm@68e3b3fbd8a7:~/examples$ llc-3.6 test.bc
llvm@68e3b3fbd8a7:~/examples$ lli-3.6 test.bc 2 2
2

Have fun with your (transformed) programs.