[llvm-dev] should we have IR intrinsics for integer min/max?

[Manuel Jacob via llvm-dev]

On 2016-11-07 20:01, Sanjay Patel via llvm-dev wrote:
> FWIW, InstCombine doesn't canonicalize any of the first 3 options
> currently. Codegen suffers because of that (depending on the target 
> machine
> and data types). Regardless of the IR choice, some backend fixes are 
> needed.

I'm missing context here.  Can you describe in more detail how the IR 
choice affects the code generation?  In case the target has special 
integer min / max instructions, why is matching all three variants 
difficult?

-Manuel