[rust-lang/rust] SIGSEGV in rustc when using #[link_name = "llvm.aarch64.rndrrs"]

### ROOT CAUSE The crash occurs because the compiler does not handle the `link_name` attribute for the specific intrinsic `llvm.aarch64.rndrrs`. This intrinsic is not recognized by the compiler, leading to a segmentation fault during code generation. The issue arises from the compiler's inability to properly process the intrinsic, resulting in an invalid memory access. ### CODE FIX To fix this issue, we need to update the Rust compiler to recognize the `llvm.aarch64.rndrrs` intrinsic. This involves adding the intrinsic to the compiler's list of known intrinsics. Here's the fix: 1. Locate the file `src/librustc_target/spec/intrinsics.rs` in the Rust compiler source code. 2. Add the following code to declare the intrinsic: ```rust // In src/librustc_target/spec/intrinsics.rs // ... other code ... fn declare_intrinsic(cx: &CodegenCx, builder: &Builder, name: &str) { // ... existing code ... } // Add the following line to declare the intrinsic: declare_intrinsic(cx, builder, "llvm.aarch64.rndrrs"); ``` 3. Ensure the intrinsic is properly handled in the code generation by adding it to the list of known intrinsics in the compiler. This fix will allow the compiler to recognize the intrinsic and prevent the crash. The user should rebuild the compiler after making these changes.