[LLVMdev] LowerArguments vs LowerFORMAL_ARGUMENTS

[Evan Cheng]

On Jan 29, 2009, at 9:36 AM, Villmow, Micah wrote:

> What is the difference between these two functions? The header file  
> for TargetLowering class says that LowerArguments must be  
> implemented, but only the Sparc and IA64 backends implement them.  
> X86, PowerPC and CellSPU implement LowerFORMAL_ARGUMENTS, but I can  
> find a setOperationAction that states that they should be lowered.  
> Can someone please explain this for me?

LowerArguments is legacy code. It should be replaced with  
LowerFORMAL_ARGUMENTS. Unfortunately, not every target has switched  
over.  The default implementation is in SelectionDAGBuild.cpp

Evan

>
> Thanks,
>
> Micah Villmow
> Systems Engineer
> Advanced Technology & Performance
> Advanced Micro Devices Inc.
> S1-609 One AMD Place
> Sunnyvale, CA. 94085
> P: 408-749-3966
>
>
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