[LLVMdev] where to put the constant island pass?

[Jim Grosbach]

ARM absolutely needs to know about control flow in that pass.

-Jim

On Oct 11, 2013, at 2:16 PM, reed kotler <rkotler at mips.com> wrote:

> Currently the ARM port does constant islands on a per function basis.
> 
> I'm aware of at least one other port that does this kind of optimization on the mc layer.
> 
> To do such long/short jump and load optimizations, you don't need anything about registers or basic blocks.
> 
> So it seems this would be better because then you can pool things on a per module basis.
> 
> In the case of Mips16, the addresses or offsets into the got for functions are a common 32 bit literal and there would be a high likelihood of calling the same function multiple times in a module.
> 
> Thoughts?
> 
> Reed
> 
> 
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