[llvm-dev] In ISel, where Constant<0> comes from?

[Krzysztof Parzyszek via llvm-dev]

On 12/17/2018 8:08 AM, Gleb Popov via llvm-dev wrote:
> 
> In the Initial selection DAG I see
> 
> t19: ch,glue = CopyToReg t17, Register:i32 $i0, Constant:i32<0>

To answer this---this seems to be a part of the return sequence, i.e. 
the part of the calling convention that dictates how a function passes 
return values to its caller. This is handled via LowerReturn in the 
target lowering object. Check SparcTargetLowering::LowerReturn for the 
Sparc implementation.

-Krzysztof

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation