running x86 program _on_ llvm

Question

Is it possible to use llvm to run x86 programs? I.e. I want to use llvm as an x86 simulator to run x86 programs and then instrument the x86 program.

Thanks!

Answer 1

Also, there was a project to use LLVM in qemu. It is also a way of running x86 code via LLVM.

http://code.google.com/p/llvm-qemu/

It was GSoC project, but there is a code in svn and author have results:

regular qemu     llvm-qemu rle,dse,simple regalloc   llvm-qemu full opts
4m35.349s             5m39.697s                        13m50.697s

llvm-qemu twice-thrice slower than qemu, but it works.