temporarily switch fatal to bug to try to track something down

Author: brandonros

crates/rustc_codegen_nvvm_v19/src/builder.rs

@@ -1035,7 +1035,7 @@ impl<'ll, 'tcx, 'a> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
     ) -> (&'ll Value, &'ll Value) {
         // allowed but only for some things and with restrictions
         // https://docs.nvidia.com/cuda/nvvm-ir-spec/index.html#cmpxchg-instruction
-        self.fatal("atomic cmpxchg is not supported")
+        bug!("atomic cmpxchg is not supported")
     }
     fn atomic_rmw(
         &mut self,
@@ -1045,15 +1045,15 @@ impl<'ll, 'tcx, 'a> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         _order: rustc_codegen_ssa::common::AtomicOrdering,
     ) -> &'ll Value {
         // see cmpxchg comment
-        self.fatal("atomic rmw is not supported")
+        bug!("atomic rmw is not supported")
     }
 
     fn atomic_fence(
         &mut self,
         _order: rustc_codegen_ssa::common::AtomicOrdering,
         _scope: rustc_codegen_ssa::common::SynchronizationScope,
     ) {
-        self.fatal("atomic fence is not supported, use cuda_std intrinsics instead")
+        bug!("atomic fence is not supported, use cuda_std intrinsics instead")
     }
 
     fn set_invariant_load(&mut self, load: &'ll Value) {

examples/cuda/vecadd/kernels/Cargo.toml

@@ -5,8 +5,6 @@ edition = "2024"
 
 [dependencies]
 cuda_std = { path = "../../../../crates/cuda_std" }
-rand_core = { version = "0.9.3" }
-rand_xoshiro = { version = "0.7.0", default-features = false }
 
 [lib]
 crate-type = ["cdylib", "rlib"]

examples/cuda/vecadd/kernels/src/lib.rs

@@ -1,34 +1,5 @@
 use cuda_std::prelude::*;
 
-use rand_core::{SeedableRng, RngCore};
-use rand_xoshiro::Xoroshiro128StarStar;
-
-const BASE64_CHARS: &[u8] = b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-fn splitmix64(mut x: u64) -> u64 {
-    x = x.wrapping_add(0x9e3779b97f4a7c15u64);
-    x = (x ^ (x >> 30)).wrapping_mul(0xbf58476d1ce4e5b9u64);
-    x = (x ^ (x >> 27)).wrapping_mul(0x94d049bb133111ebu64);
-    x ^ (x >> 31)
-}
-
-pub fn generate_random_private_key(thread_idx: usize, rng_seed: u64) -> [u8; 32] {
-    let mixed_seed = splitmix64(rng_seed.wrapping_add(thread_idx as u64));
-    let mut private_key = [0u8; 32];
-    let mut rng = Xoroshiro128StarStar::seed_from_u64(mixed_seed);
-    rng.fill_bytes(&mut private_key);
-    private_key
-}
-
-pub fn generate_base64_nonce(thread_idx: usize, rng_seed: u64, nonce: &mut [u8]) {
-    let mixed_seed = splitmix64(rng_seed.wrapping_add(thread_idx as u64));
-    let mut rng = Xoroshiro128StarStar::seed_from_u64(mixed_seed);
-    for byte in nonce.iter_mut() {
-        let idx = (rng.next_u32() % 64) as usize;
-        *byte = BASE64_CHARS[idx];
-    }
-}
-
 #[kernel]
 #[allow(improper_ctypes_definitions, clippy::missing_safety_doc)]
 pub unsafe fn vecadd(a: &[f32], b: &[f32], c: *mut f32) {