llvm dev - Dec 2013 - [LLVMdev] x86: inline an LLVM IR function?

Sorry for what may possibly be a rather stupid question, but how on earth
do you make LLC inline a function?  I've got this code:

   attributes 0 = { alwaysinline nounwind }

   define internal i32 @lambda(i32 %a, i32 %x) #0 {
      %1 = add i32 %a, %x
      ret i32 %1
   }

   define i32 @foo(i32 %a) nounwind {
      %1 = call i32 @lambda(i32 %a, i32 10)
      ret i32 %1
   }

And no matter what I do, the function @lambda ends up being called
with a call instruction.  I've tried with -O2, -O3, and with and
without the alwaysinline attribute.

How do I get LLC or Clang to inline the above @lambda function?

Thanks in advance!


-- Mikael
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You should use "opt" with -inline, or -O2/3 to optimise this.
llc only runs backend optimisations.



On 1 December 2013 18:51, Mikael Lyngvig <mikael at lyngvig.org> wrote:
> Sorry for what may possibly be a rather stupid question, but how on earth
> do you make LLC inline a function?  I've got this code:
>
>    attributes 0 = { alwaysinline nounwind }
>
>    define internal i32 @lambda(i32 %a, i32 %x) #0 {
>       %1 = add i32 %a, %x
>       ret i32 %1
>    }
>
>    define i32 @foo(i32 %a) nounwind {
>       %1 = call i32 @lambda(i32 %a, i32 10)
>       ret i32 %1
>    }
>
> And no matter what I do, the function @lambda ends up being called with a
call instruction.  I've tried with -O2, -O3, and with and without the
alwaysinline attribute.
>
> How do I get LLC or Clang to inline the above @lambda function?
>
> Thanks in advance!
>
>
> -- Mikael
>
>
>
> _______________________________________________
> 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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Thank you!


-- Mikael


2013/12/1 Joey Gouly <joel.gouly at gmail.com>
> You should use "opt" with -inline, or -O2/3 to optimise this.
> llc only runs backend optimisations.
>
>
>
> On 1 December 2013 18:51, Mikael Lyngvig <mikael at lyngvig.org>
wrote:
>
>> Sorry for what may possibly be a rather stupid question, but how on
earth
>> do you make LLC inline a function?  I've got this code:
>>
>>    attributes 0 = { alwaysinline nounwind }
>>
>>    define internal i32 @lambda(i32 %a, i32 %x) #0 {
>>       %1 = add i32 %a, %x
>>       ret i32 %1
>>    }
>>
>>    define i32 @foo(i32 %a) nounwind {
>>       %1 = call i32 @lambda(i32 %a, i32 10)
>>       ret i32 %1
>>    }
>>
>> And no matter what I do, the function @lambda ends up being called with
a call instruction.  I've tried with -O2, -O3, and with and without the
alwaysinline attribute.
>>
>> How do I get LLC or Clang to inline the above @lambda function?
>>
>> Thanks in advance!
>>
>>
>> -- Mikael
>>
>>
>>
>> _______________________________________________
>> 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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