All Questions
Tagged with webassembly llvm
42
questions
0
votes
1
answer
51
views
How to convert LLVM IR to other Intermediate Representations?
I want to know how LLVM IR can be converted t other intermediate representations. I know that using
llc -march=wasm32 -filetype=asm arithmetic.ll -o example.wat one can convert LLVM IR to the WASM IR ...
- 13
0
votes
0
answers
138
views
Compile clang into WASM using WASI-SDK
I'm trying to compile "clang" and "lld" into web assembly with the WASI-SDK 21.0 as my system root directory. I got build errors while compiling but I cannot resolve them properly.
...
- 327
0
votes
1
answer
814
views
How to compile C to LLVM IR in the browser with WASM?
I see through How to make clang compile to llvm IR that you can generate LLVM IR from C like this:
clang -S -emit-llvm foo.c
Which produces foo.ll as an LLVM IR-containing file.
I see two WASM ...
- 77.9k
0
votes
0
answers
25
views
How does the instruction "atomic.fence" work on the code generated through LLVM "stackify pass"?
I am trying to find some example cases regarding the WebAssembly instruction atomic.fence, but what I only found on the Internet are the test cases in the LLVM implementation of this instruction, and ...
- 2,022
5
votes
0
answers
208
views
Calling webassembly gc functions in c using emscripten/llvm
I am porting a library that uses libgc's garbage collected allocation to web using the emscripten/LLVM toolchain. I am aware that webassembly has MVP gc support. My idea is to redefine GC_MALLOC (the ...
- 429
0
votes
2
answers
234
views
compilation error of c code to web assembly
I am trying to compile a simple C code to web assembly
$ clang --target=wasm32 main.c -o primes.wasm
main.c:1:10: fatal error: 'stdio.h' file not found
#include <stdio.h>
^~~~~~~~~
1 ...
- 6,760
1
vote
0
answers
307
views
How to work with a reference to a JS object inside WASM, which is compiled from C++?
I'm trying to develop a C++ library that will work with HTML elements. So, I need classes that will store references to Element, which I will get through document.getElementById("id"). Since ...
- 33
1
vote
1
answer
350
views
Invalid alignment value (Producer: 'LLVM14.0.0git' Reader: 'LLVM 13.0.0git')
I try to build wasm on my ubuntu desktop. I'm using Ubuntu 22.04 I tried to install llvm-14 in terminal. But it didn't work. Error is here:
Invalid alignment value (Producer: 'LLVM14.0.0git' Reader: '...
- 535
4
votes
1
answer
3k
views
Error linking .o file to .wasm with wasm-ld
I've been trying to convert a cpp file to wasm without emscripten recently and I've been running with some errors, for example, when I run these commands:
clang++ --target=wasm32 -nostdlib -O3 -o ...
- 125
1
vote
1
answer
881
views
WebAssembly wasm-ld cannot resolve __builtin_memcpy and __builtin_memset
I'm working on a C++/Wasm-Module and have a hard time with clang and wasm-ld.
the toolchain lets me use builtin functions like
__builtin_clz
__builtin_floorf
just fine.
The following functions are ...
- 129
5
votes
1
answer
2k
views
Can't compile to .wasm on Linux
Summary
(Edit: removed all unnecessary information, added Windows10 experience, upgraded CLANG on Ubuntu to the same version, removed Debian10 due to old CLANG version)
I've created a pretty simple ...
- 3,152
0
votes
1
answer
597
views
Does llvm support exception handling in WebAssembly?
The Exception Handling Proposal has been implemented in some environments, e.g. in binaryen. But has it been implemented in llvm yet? Will llvm based compilers (with wasm as a target) like clang or ...
- 1,140
1
vote
0
answers
453
views
How should I translate RISC-V bytecode into WASM?
For a project I'm working on, it would be useful to be able to run RISC-V assembly in the browser fast. From what I can tell, I think the fastest way to do this is to translate the RISC-V assembly/...
- 600
2
votes
2
answers
1k
views
Accessing `__heap_base` when building a `.wasm` binary with Rust
Wanted to follow what it is done in this article: https://surma.dev/things/c-to-webassembly/ but with Rust and write a custom allocator.
For that I would need to access __heap_base variable that llvm ...
3
votes
1
answer
498
views
Why does clang emit i64 instructions when targeting wasm32?
I used clang --target=wasm32-unknown-wasi ... to compile a Hello World C program into WebAssembly. Everything goes fine, and the .wasm file can run correctly in runtime like wasmer.
But when I check ...
- 35