A PoC-ish Trick: LLVM IR Generation with Ruby

A Lightning Talk at RubyConf 2016

Transcript

1. A PoC-ish Trick: LLVM IR
   Generation with Ruby
   A Lightning Talk at RubyConf 2016
   Kei Sawada (@remore)
   

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3. a modern, fast, and open source language for
   data science and technical computing
   

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4. Julia is
   4 years old young
   Good performance, as fast as C
   Dynamic typing
   Julia has
   Capability to call C functions directly without
   wrappers or special APIs
   a compiler that used LLVM to translate Julia
   programs into ef cient executable code
   

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5. In short,
   

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6. Write some Julia code then you
   will get LLVM IR without hassle
   

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7. debussy:~ guest$ julia
   _
   _ _ _(_)_ | A fresh approach to technical computin
   (_) | (_) (_) | Documentation: http://docs.julialang.o
   _ _ _| |_ __ _ | Type "?help" for help.
   | | | | | | |/ _` | |
   | | |_| | | | (_| | | Version 0.4.6 (2016-06-19 17:16 UTC)
   _/ |\__'_|_|_|\__'_| |
   |__/ | x86_64-apple-darwin15.5.0
   julia>
   

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8. debussy:~ guest$ julia
   _
   _ _ _(_)_ | A fresh approach to technical computin
   (_) | (_) (_) | Documentation: http://docs.julialang.o
   _ _ _| |_ __ _ | Type "?help" for help.
   | | | | | | |/ _` | |
   | | |_| | | | (_| | | Version 0.4.6 (2016-06-19 17:16 UTC)
   _/ |\__'_|_|_|\__'_| |
   |__/ | x86_64-apple-darwin15.5.0
   julia> function hello()
   "rubyconf"
   end
   hello (generic function with 1 method)
   julia>
   

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9. debussy:~ guest$ julia
   _
   _ _ _(_)_ | A fresh approach to technical computin
   (_) | (_) (_) | Documentation: http://docs.julialang.o
   _ _ _| |_ __ _ | Type "?help" for help.
   | | | | | | |/ _` | |
   | | |_| | | | (_| | | Version 0.4.6 (2016-06-19 17:16 UTC)
   _/ |\__'_|_|_|\__'_| |
   |__/ | x86_64-apple-darwin15.5.0
   julia> function hello()
   "rubyconf"
   end
   hello (generic function with 1 method)
   julia> hello()
   "rubyconf"
   julia>
   

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10. julia> code_llvm(hello, ())
    define %jl_value_t* @julia_hello_21549() {
    top:
    ret %jl_value_t* inttoptr (i64 4447575696 to %jl_value_t*)
    }
    julia>
    

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11. julia> code_llvm(hello, ())
    define %jl_value_t* @julia_hello_21549() {
    top:
    ret %jl_value_t* inttoptr (i64 4447575696 to %jl_value_t*)
    }
    julia> code_native(hello, ())
    .section __TEXT,__text,regular,pure_instructions
    Filename: none
    Source line: 2
    pushq %rbp
    movq %rsp, %rbp
    movabsq $4447575696, %rax ## imm = 0x109189E90
    Source line: 2
    popq %rbp
    ret
    julia>
    

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12. OK Julia is a thing
    But we are in
    

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14. What if
    

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15. You can write some Ruby code
    which can be translated into Julia
    where you can get LLVM IR easily?
    

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16. Ruby -> Julia -> LLVM IR
    

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18. Julializer
    Allow you to convert your arbitrary
    Ruby code into Julia code
    

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19. Time to DEMO!
    

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20. For more examples and attempts, check out:
    github.com/remore/julializer
    github.com/remore/virtual_module
    Thanks!
    

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