julia

a4bf186a - intrinsics: Implement arbitrary-width integer intrinsics in C (#61399)

intrinsics: Implement arbitrary-width integer intrinsics in C (#61399) This PR removes our dependency on LLVM for our arbitrary-precision integer intrinsics, reducing the runtime's dependency on `libstdc++` / LLVMSupport. The main performance trade-off versus the LLVM implementation is that this implements "schoolbook" multiplication / division, rather than accelerated algorithms (I believe LLVM provides Knuth's "Algorithm D"). These intrinsics are used only rarely as a runtime / interpreted fallback to native execution of these intrinsics via LLVM codegen, so I doubt these implementations are performance-sensitive in practice. This PR is significantly generated by AI and then refined / fixed by me, especially in the areas of rounding, code structure, and sign bits. Resolves #61421. Resolves #61419. Resolves #61423. --------- Co-authored-by: Claude <claude@anthropic.com>