llvm dev - Jul 2009 - [LLVMdev] Where does llvm.memcpy.i64 and friends get lowered ?

I am iterating through Modules symbols for 'test/CodeGen/X86/memcpy.bc

I get :-

---------- Functions ----------
llvm.memcpy.i64
        Mangled name = llvm.memcpy.i64
        DefaultVisibility
        ExternalLinkage - Externally visible.
my_memcpy
        Mangled name = my_memcpy
        DefaultVisibility
        ExternalLinkage - Externally visible.
my_memcpy2
        Mangled name = my_memcpy2
        DefaultVisibility
        ExternalLinkage - Externally visible.
abort
        Mangled name = abort
        DefaultVisibility
        ExternalLinkage - Externally visible.
----------- Globals -----------
----------- Aliases -----------

I am using this to define my symbols, but the relocations contain
'memcpy'.

Aaron



2009/7/18 Eli Friedman <eli.friedman at gmail.com>
> On Sat, Jul 18, 2009 at 2:21 PM, Aaron
> Gray<aaronngray.lists at googlemail.com> wrote:
> > I am working on the COFF backend and am wondering where llvm.memcpy
gets
> > lowered to memcpy ?
>
> It's done by ISel.  See SelectionDAG::getMemcpy.
>
> -Eli
>  _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
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On Jul 18, 2009, at 2:56 PM, Aaron Gray wrote:
> I am iterating through Modules symbols for 'test/CodeGen/X86/memcpy.bc
If you're iterating over functions, just ignore all intrinsics.

-Chris
>
> I get :-
>
> ---------- Functions ----------
> llvm.memcpy.i64
>         Mangled name = llvm.memcpy.i64
>         DefaultVisibility
>         ExternalLinkage - Externally visible.
> my_memcpy
>         Mangled name = my_memcpy
>         DefaultVisibility
>         ExternalLinkage - Externally visible.
> my_memcpy2
>         Mangled name = my_memcpy2
>         DefaultVisibility
>         ExternalLinkage - Externally visible.
> abort
>         Mangled name = abort
>         DefaultVisibility
>         ExternalLinkage - Externally visible.
> ----------- Globals -----------
> ----------- Aliases -----------
>
> I am using this to define my symbols, but the relocations contain  
> 'memcpy'.
>
> Aaron
>
>
>
> 2009/7/18 Eli Friedman <eli.friedman at gmail.com>
> On Sat, Jul 18, 2009 at 2:21 PM, Aaron
> Gray<aaronngray.lists at googlemail.com> wrote:
> > I am working on the COFF backend and am wondering where  
> llvm.memcpy gets
> > lowered to memcpy ?
>
> It's done by ISel.  See SelectionDAG::getMemcpy.
>
> -Eli
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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2009/7/18 Chris Lattner <clattner at apple.com>
>
>  On Jul 18, 2009, at 2:56 PM, Aaron Gray wrote:
>
>  I am iterating through Modules symbols for 'test/CodeGen/X86/memcpy.bc
>
>
> If you're iterating over functions, just ignore all intrinsics.
>

Okay, but it would be nice if the Module object reflected the lowered symbol
names like 'memcpy' too. It seems a bit of an inconsistancy for the
Module
not to reference this and have to pick it up from the relocations.

Also there is the matter of 'abort' which seems to be defined by most if
not
all modules even if it is not being used. I am using GlobalValue::getUses()
to filter it. Whats going on with 'abort' ?

Aaron

>
> -Chris
>
>
> I get :-
>
> ---------- Functions ----------
> llvm.memcpy.i64
>         Mangled name = llvm.memcpy.i64
>         DefaultVisibility
>         ExternalLinkage - Externally visible.
> my_memcpy
>         Mangled name = my_memcpy
>         DefaultVisibility
>         ExternalLinkage - Externally visible.
> my_memcpy2
>         Mangled name = my_memcpy2
>         DefaultVisibility
>         ExternalLinkage - Externally visible.
> abort
>         Mangled name = abort
>         DefaultVisibility
>         ExternalLinkage - Externally visible.
> ----------- Globals -----------
> ----------- Aliases -----------
>
> I am using this to define my symbols, but the relocations contain
'memcpy'.
>
> Aaron
>
>
>
> 2009/7/18 Eli Friedman <eli.friedman at gmail.com>
>
>> On Sat, Jul 18, 2009 at 2:21 PM, Aaron
>> Gray<aaronngray.lists at googlemail.com> wrote:
>> > I am working on the COFF backend and am wondering where
llvm.memcpy gets
>> > lowered to memcpy ?
>>
>> It's done by ISel.  See SelectionDAG::getMemcpy.
>>
>> -Eli
>>  _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
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