There is an offline compiler for OpenCL included in OSX 10.7, at /System/Library/Frameworks/OpenCL.framework/Versions/A/Libraries/openclc
This is pretty much a standard clang executable, and accepts common clang options. Sample arguments of interest,
-O3 -x cl -triple i386-applecl-darwin -S < loop.cl
Shows the assembly code for an OpenCL kernel.
-x cl -triple i386-applecl-darwin -emit-llvm < loop.cl
Shows the LLVM textual-IR for a kernel.
The official documentation and example of this suggest the use of generating LLVM bit code offline, for 32 and 64 bit CPU and 32 bit GPU. More useful advice included in the OpenCL Mac programming guide.