[llvm-dev] A "Cross-Platform Runtime Library API" in LLVM IR
Lorenzo Laneve via llvm-dev
llvm-dev at lists.llvm.org
Sun May 22 12:32:11 PDT 2016
I know, that's the problem.
We can assume all of the system calls as runtime functions: such as I/O, allocations etc. and create a set of function implemented for all the architectures.
For example, let's think about the mem allocation again: we can provide a primitive function with the same name for all archs (e.g. __alloc() ) and then people can include this function __alloc() in their libraries, inlining it or even renaming it just to fit the frontend needs. And this can be useful: every backend should implement this set of functions ( __alloc(), __free(), __write()… just for example) so the frontends can build a library with these functions as they want.
I don't know if you get me.
> On May 22, 2016, at 9:06 PM, Matthias Braun <matze at braunis.de> wrote:
>> On May 22, 2016, at 10:31 AM, Lorenzo Laneve via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>> My idea is an API where anyone can build a Runtime Library for any backend, including a set of functions people can inline/rename creating functions the frontend can include in the IR.
>> For example implementing a cross-platform runtime function that allocates memory for a new object. (Obviously the library will have to be compiled for each target).
> Memory allocation is usually considered part of libc. There are several libc implementations that target multiple architectures. musl, glibc, newlib, diet libc to name just a few.
> - Matthias
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