possible miscompilation on aarch64 #117077
Description
this code runs to completion when executed with miri or on x86, but segfaults on aarch64 in release builds
[package]
name = "faer-aarch64-bug"
version = "0.1.0"
edition = "2021"
[dependencies]
dyn-stack = "0.10.0"
faer-core = "0.14.1"
faer-svd = "0.14.1"
pulp = "0.17.1"
gemm = "0.16.14"
rand = "0.8.5"
[profile.release]
codegen-units=1use dyn_stack::PodStack;
use faer_core::Mat;
use faer_svd::compute_svd;
use rand::{Rng, SeedableRng};
fn main() {
let nrows = 5;
let ncols = 5;
let size = Ord::min(nrows, ncols);
let mut gen = rand::rngs::StdRng::seed_from_u64(0);
for _ in 0..10 {
let m = Mat::from_fn(nrows, ncols, |_, _| {
gen.gen::<f64>()
});
let mut s = Mat::<f64>::zeros(size, 1);
let mut u = Mat::<f64>::zeros(nrows, nrows);
let mut v = Mat::<f64>::zeros(ncols, ncols);
compute_svd(
m.as_ref(),
s.as_mut(),
Some(u.as_mut()),
Some(v.as_mut()),
faer_core::Parallelism::None,
PodStack::new(&mut vec![0u8; 1024 * 1024]),
Default::default(),
);
}
}i tried isolating the issue but it's very elusive, and randomly disappears as different functions get inlined or noinlined, so the best i have is this example here
Meta
rustc --version --verbose:
rustc 1.75.0-nightly (1c05d50c8 2023-10-21)
binary: rustc
commit-hash: 1c05d50c8403c56d9a8b6fb871f15aaa26fb5d07
commit-date: 2023-10-21
host: aarch64-apple-darwin
release: 1.75.0-nightly
LLVM version: 17.0.3