Re: [julia-users] Code introspection for generated function
OK, I thought what Tim wrote might be helpful for me so I took the
expression generated by this and stuck it into a function which I then
compiled to see the code_native (I want to see code_native/code_lowered of
the final generated function - not the Julia code from a generated function
which I did already know how to do, nor the native/llvm code of the *code
generator* which is what code_native and code_llvm give in 0.4.3).
Anyway, my approach seemed to collide with another issue I had
(https://groups.google.com/forum/#!topic/julia-users/4uDLFZUF_xM) where
Expr(:meta,:inline) seems to behave different depending on if a function is
generated (its OK) or not (must use @inline).
So, to reiterate, is there a reliable way to get the native code of a
generated function? Tim specifically - is there a mangled function name or
something I might be able to hook code_native into?
Thank you all for your help and patience.
Andy
On Wednesday, February 10, 2016 at 10:27:38 PM UTC+10, Tim Holy wrote:
>
> Slightly modifying an example from the docs:
>
> julia> function mysub2ind_gen(N)
>ex = :(I[$N] - 1)
>for i = N-1:-1:1
>ex = :(I[$i] - 1 + dims[$i]*$ex)
>end
>return :($ex + 1)
>end
> mysub2ind_gen (generic function with 1 method)
>
> julia> @generated function mysub2ind{N}(dims::NTuple{N}, I::Integer...)
>length(I) == N || error("wrong number of indexes")
>mysub2ind_gen(N)
>end
> mysub2ind (generic function with 1 method)
>
> julia> mysub2ind_gen(3)
> :(((I[1] - 1) + dims[1] * ((I[2] - 1) + dims[2] * (I[3] - 1))) + 1)
>
> julia> mysub2ind((5,5,5), 1, 2, 3)
> 56
>
> julia> sub2ind((5,5,5), 1, 2, 3)
> 56
>
>
> On Wednesday, February 10, 2016 03:31:15 AM Jeffrey Sarnoff wrote:
> > Tim -- would you repeat that with some simple content illustrative of a
> > useful use for generation --- thx
> >
> > On Wednesday, February 10, 2016 at 5:27:12 AM UTC-5, Tim Holy wrote:
> > > On Tuesday, February 09, 2016 08:52:22 PM Andy Ferris wrote:
> > > > What's the best way to find the code generated by a @generated
> function?
> > >
> > > This isn't easy unless you (or the author) provides a function to do
> so:
> > > @generated function foo(x, y)
> > >
> > > foo_generator(x, y)
> > >
> > > end
> > >
> > > function foo_generator{Tx,Ty}(::Type{Tx}, ::Type{Ty})
> > >
> > > # generate and return the expression for the function body
> > >
> > > end
> > >
> > > Then you can call `foo_generator(typeof(x), typeof(y))` to see the
> > > returned
> > > code.
> > >
> > > Best,
> > > --Tim
>
>
Re: [julia-users] Code introspection for generated function
This might fall under:
https://github.com/JuliaLang/julia/issues/2625
On Thursday, 11 February 2016 02:54:42 UTC, Andy Ferris wrote:
>
> OK thanks Tim!
>
> Is there some way/plan to fix this in the future, to make it more
> convenient?
>
> Andy
>
> On Wednesday, February 10, 2016 at 10:27:38 PM UTC+10, Tim Holy wrote:
>>
>> Slightly modifying an example from the docs:
>>
>> julia> function mysub2ind_gen(N)
>>ex = :(I[$N] - 1)
>>for i = N-1:-1:1
>>ex = :(I[$i] - 1 + dims[$i]*$ex)
>>end
>>return :($ex + 1)
>>end
>> mysub2ind_gen (generic function with 1 method)
>>
>> julia> @generated function mysub2ind{N}(dims::NTuple{N}, I::Integer...)
>>length(I) == N || error("wrong number of indexes")
>>mysub2ind_gen(N)
>>end
>> mysub2ind (generic function with 1 method)
>>
>> julia> mysub2ind_gen(3)
>> :(((I[1] - 1) + dims[1] * ((I[2] - 1) + dims[2] * (I[3] - 1))) + 1)
>>
>> julia> mysub2ind((5,5,5), 1, 2, 3)
>> 56
>>
>> julia> sub2ind((5,5,5), 1, 2, 3)
>> 56
>>
>>
>> On Wednesday, February 10, 2016 03:31:15 AM Jeffrey Sarnoff wrote:
>> > Tim -- would you repeat that with some simple content illustrative of a
>> > useful use for generation --- thx
>> >
>> > On Wednesday, February 10, 2016 at 5:27:12 AM UTC-5, Tim Holy wrote:
>> > > On Tuesday, February 09, 2016 08:52:22 PM Andy Ferris wrote:
>> > > > What's the best way to find the code generated by a @generated
>> function?
>> > >
>> > > This isn't easy unless you (or the author) provides a function to do
>> so:
>> > > @generated function foo(x, y)
>> > >
>> > > foo_generator(x, y)
>> > >
>> > > end
>> > >
>> > > function foo_generator{Tx,Ty}(::Type{Tx}, ::Type{Ty})
>> > >
>> > > # generate and return the expression for the function body
>> > >
>> > > end
>> > >
>> > > Then you can call `foo_generator(typeof(x), typeof(y))` to see the
>> > > returned
>> > > code.
>> > >
>> > > Best,
>> > > --Tim
>>
>>
Re: [julia-users] Code introspection for generated function
Tim -- would you repeat that with some simple content illustrative of a
useful use for generation --- thx
On Wednesday, February 10, 2016 at 5:27:12 AM UTC-5, Tim Holy wrote:
>
> On Tuesday, February 09, 2016 08:52:22 PM Andy Ferris wrote:
> > What's the best way to find the code generated by a @generated function?
>
> This isn't easy unless you (or the author) provides a function to do so:
>
> @generated function foo(x, y)
> foo_generator(x, y)
> end
>
> function foo_generator{Tx,Ty}(::Type{Tx}, ::Type{Ty})
> # generate and return the expression for the function body
> end
>
> Then you can call `foo_generator(typeof(x), typeof(y))` to see the
> returned
> code.
>
> Best,
> --Tim
>
>
Re: [julia-users] Code introspection for generated function
On Tuesday, February 09, 2016 08:52:22 PM Andy Ferris wrote:
> What's the best way to find the code generated by a @generated function?
This isn't easy unless you (or the author) provides a function to do so:
@generated function foo(x, y)
foo_generator(x, y)
end
function foo_generator{Tx,Ty}(::Type{Tx}, ::Type{Ty})
# generate and return the expression for the function body
end
Then you can call `foo_generator(typeof(x), typeof(y))` to see the returned
code.
Best,
--Tim
Re: [julia-users] Code introspection for generated function
Slightly modifying an example from the docs:
julia> function mysub2ind_gen(N)
ex = :(I[$N] - 1)
for i = N-1:-1:1
ex = :(I[$i] - 1 + dims[$i]*$ex)
end
return :($ex + 1)
end
mysub2ind_gen (generic function with 1 method)
julia> @generated function mysub2ind{N}(dims::NTuple{N}, I::Integer...)
length(I) == N || error("wrong number of indexes")
mysub2ind_gen(N)
end
mysub2ind (generic function with 1 method)
julia> mysub2ind_gen(3)
:(((I[1] - 1) + dims[1] * ((I[2] - 1) + dims[2] * (I[3] - 1))) + 1)
julia> mysub2ind((5,5,5), 1, 2, 3)
56
julia> sub2ind((5,5,5), 1, 2, 3)
56
On Wednesday, February 10, 2016 03:31:15 AM Jeffrey Sarnoff wrote:
> Tim -- would you repeat that with some simple content illustrative of a
> useful use for generation --- thx
>
> On Wednesday, February 10, 2016 at 5:27:12 AM UTC-5, Tim Holy wrote:
> > On Tuesday, February 09, 2016 08:52:22 PM Andy Ferris wrote:
> > > What's the best way to find the code generated by a @generated function?
> >
> > This isn't easy unless you (or the author) provides a function to do so:
> > @generated function foo(x, y)
> >
> > foo_generator(x, y)
> >
> > end
> >
> > function foo_generator{Tx,Ty}(::Type{Tx}, ::Type{Ty})
> >
> > # generate and return the expression for the function body
> >
> > end
> >
> > Then you can call `foo_generator(typeof(x), typeof(y))` to see the
> > returned
> > code.
> >
> > Best,
> > --Tim
Re: [julia-users] Code introspection for generated function
OK thanks Tim!
Is there some way/plan to fix this in the future, to make it more
convenient?
Andy
On Wednesday, February 10, 2016 at 10:27:38 PM UTC+10, Tim Holy wrote:
>
> Slightly modifying an example from the docs:
>
> julia> function mysub2ind_gen(N)
>ex = :(I[$N] - 1)
>for i = N-1:-1:1
>ex = :(I[$i] - 1 + dims[$i]*$ex)
>end
>return :($ex + 1)
>end
> mysub2ind_gen (generic function with 1 method)
>
> julia> @generated function mysub2ind{N}(dims::NTuple{N}, I::Integer...)
>length(I) == N || error("wrong number of indexes")
>mysub2ind_gen(N)
>end
> mysub2ind (generic function with 1 method)
>
> julia> mysub2ind_gen(3)
> :(((I[1] - 1) + dims[1] * ((I[2] - 1) + dims[2] * (I[3] - 1))) + 1)
>
> julia> mysub2ind((5,5,5), 1, 2, 3)
> 56
>
> julia> sub2ind((5,5,5), 1, 2, 3)
> 56
>
>
> On Wednesday, February 10, 2016 03:31:15 AM Jeffrey Sarnoff wrote:
> > Tim -- would you repeat that with some simple content illustrative of a
> > useful use for generation --- thx
> >
> > On Wednesday, February 10, 2016 at 5:27:12 AM UTC-5, Tim Holy wrote:
> > > On Tuesday, February 09, 2016 08:52:22 PM Andy Ferris wrote:
> > > > What's the best way to find the code generated by a @generated
> function?
> > >
> > > This isn't easy unless you (or the author) provides a function to do
> so:
> > > @generated function foo(x, y)
> > >
> > > foo_generator(x, y)
> > >
> > > end
> > >
> > > function foo_generator{Tx,Ty}(::Type{Tx}, ::Type{Ty})
> > >
> > > # generate and return the expression for the function body
> > >
> > > end
> > >
> > > Then you can call `foo_generator(typeof(x), typeof(y))` to see the
> > > returned
> > > code.
> > >
> > > Best,
> > > --Tim
>
>
