Oml - LLVM backend for MultiOberon

[Dmitry Dagaev]

Oml backend outputs LLVM bytecode files in textual .ll and binary .bc representation. The .bc file can be dynamically loaded by OmlBcLoader which uses JIT compiler.

MultiOberon build command produces object file .o, which can be dynamically loaded and executed by runtime.

MultiOberon build provides also linking abilities for creating executive.

[Dmitry Dagaev]

Simple example demonstates howto compile HelloWorld in command line

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c:\suok5\Mob>Blwe\omlsh co -odc OmtestHelloWorld
oml:compiling c:\suok5\Mob/Omtest/Mod/HelloWorld.odc  >c:\suok5\Mob/Omtest/Clwe/OmtestHelloWorld .ll=9742 .bc=3420

Compilation results in .ll and .bc bytecode files

After this, the program can be executed in LLVM JIT compiler

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c:\suok5\Mob>Blwe\omlsh run -ext bc OmtestHelloWorld
Hello, World

But loading in JIT is too time-consuming.
Just compile this to object file.

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c:\suok5\Mob>Blwe\omlsh build OmtestHelloWorld
===== obj-building HostConLog ... done
===== obj-building OmtestHelloWorld ... done

After this, the object file can be loaded with all necessary fixups

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c:\suok5\Mob>Blwe\omlsh run OmtestHelloWorld
Hello, World

If we need 64-bit, use the similar shell from Blwr directory. Blwr is 64-bit binary catalog. Blwr differs from Blwe, as RAX register differs from EAX. Compile

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c:\suok5\Mob>Blwr\omlsh co -odc OmtestHelloWorld
oml:compiling c:\suok5\Mob/Omtest/Mod/HelloWorld.odc  >c:\suok5\Mob/Omtest/Clwr/OmtestHelloWorld .ll=9742 .bc=3424

Build

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c:\suok5\Mob>Blwr\omlsh build OmtestHelloWorld
===== obj-building HostConLog ... done
===== obj-building OmtestHelloWorld ... done

And Run

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c:\suok5\Mob>Blwr\omlsh run OmtestHelloWorld
Hello, World