llvm dev - Nov 2008 - [LLVMdev] ARM libgcc dependencies

I was trying to build some code today for an ARM7TDMI, which does not
have a hardware divider and I noticed that LLVM translated divide
instructions into a call into libgcc's udivsi3.  Is there any way of
removing this library dependency and allowing LLVM's link time
optimizer optimize the generated division code (inline it, merge the
div/mod if using both, etc)?

Thanks much,
Arlen

You can specify a different libcall to eliminate libgcc dependency. If  
you want to expand the div into a serious of instructions you can  
custom expand it during the legalization phase.

Evan

On Nov 14, 2008, at 11:44 PM, Arlen Cox <arlencox at gmail.com> wrote:
> I was trying to build some code today for an ARM7TDMI, which does not
> have a hardware divider and I noticed that LLVM translated divide
> instructions into a call into libgcc's udivsi3.  Is there any way of
> removing this library dependency and allowing LLVM's link time
> optimizer optimize the generated division code (inline it, merge the
> div/mod if using both, etc)?
>
> Thanks much,
> Arlen
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