[LLVMdev] Calling Convention & Stack Frame

[Bruno Cardoso Lopes]

2007/6/20, Peltier, Mikael <m-peltier at ti.com>:
>
>
>
> Hello,
>

Hi,

I want to find information/documentation on how reorganize stack frame (add
> other information, etc.) & how add new calling convention into ARM backend?
>
>
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> I think it is needed to modify lowering of CALL, RET & FORMAL_ARGUMENT
> instruction, and also to modify emitPrologue & emitEpilogue functions.
>
>
>
> What are the others things to modify in order to realize my
> experimentation? Is it the best way to do it?
>

You can specify different calling conventions on the specific arch file
<ARCH>CallingConv.td (see X86/PowerPC/Mips for examples).
They must be handled on the lowering of CALL, RET and FORMAL_ARGUMENTS!
Take a look at the following functions called in <ARCH>ISelLowering.cpp  :
CCInfo.AnalyzeCallOperands
CCInfo.AnalyzeCallResult
CCInfo.AnalyzeFormalArguments
CCInfo.AnalyzeReturn

Thanks in advance.
>
>
>
> Mikaël.
>

Cheers,

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-- 
Bruno Cardoso Lopes
http://www.brunocardoso.org

"The Man in Black fled across the desert and the gunslinger followed"
  - Childe Roland to the Dark Tower Came
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