llvm dev - Jan 2018 - Fwd: llvm.memcpy for struct copy

Hi all
      why does llvm.memcpy only support i8* ?  and how does clang transform
struct copy?
     Thanks !

     Regards
     Jun
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Hi all
     why does llvm.memcpy intrinsic only support i8*  for first two
arguments?  and does clang will also transform struct copy into llvm.memcpy
? what format does IR looks like?
     Thanks !

     Regards
     Jun
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There's no need for anything else, you can bitcast any struct pointer to an
i8 pointer (which is free/needs no instructions in all the targets I know of).

- Matthias
> On Jan 29, 2018, at 11:06 PM, ma jun via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> Hi all
>      why does llvm.memcpy intrinsic only support i8*  for first two
arguments?  and does clang will also transform struct copy into llvm.memcpy ?
what format does IR looks like?
>      Thanks !
>      
>      Regards
>      Jun
> 
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> llvm-dev at lists.llvm.org
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