Can a C compiler generate an executable 64-bits where pointers are 32-bits?

Question

Most programs fits well on <4GB address space but needs to use new features just available on x64 architecture.

Are there compilers/platforms where I can use x64 regi

Answer 1

It's worth noting that there an ABI in development for linux, X32, that lets you build a x86_64 binary that uses 32 bit indices and addresses.

Only relatively new, but interesting nonetheless.

http://en.wikipedia.org/wiki/X32_ABI