[LLVMdev] Segment Register Use

[Holger Schurig]

> if your LLVM still depends on either Generic or some of the
> RTL models they use in various processor definitions, I
> express concern for optimization and compilation.

Thank you for your concerns.

However, LLVM is in the first place an environment to write 
compilers. As an example for llvm, it can use the GCC frontend 
for compilation. "clang" is another compile, that can compile 
programs without any call to any gcc part.

To learn more about code-generation for x86 targets inside LLVM 
(e.g. without the help of GCC), look at those files:

http://llvm.org/svn/llvm-project/llvm/trunk/lib/Target/X86


Also, can you provide an example of the same program, once 
compiled with the use of CS/DS and once without this?  I mean: 
show use the assembly code. How far apart is the performance of 
those two test programs?  For which ABI can you compile with 
using CS/DS?  AFAIK a Linux environment disables this.

Somehow your mail remembers me at times than I compiled under 
MSDOS and I had several memory models to select from, 
e.g. "tiny", "medium", "large", "flat" ...