llvm-project

365bddf6 - [hwasan] Add intrinsics for fixed shadow on Aarch64 (#89319)

[hwasan] Add intrinsics for fixed shadow on Aarch64 (#89319) This patch introduces HWASan memaccess intrinsics that assume a fixed shadow (with the offset provided by --hwasan-mapping-offset=...), with and without short granule support. The behavior of HWASan is not meaningfully changed by this patch; future work ("Optimize outlined memaccess for fixed shadow on Aarch64": https://github.com/llvm/llvm-project/pull/88544) will make HWASan use these intrinsics. We currently only support lowering the LLVM IR intrinsic to AArch64. The test case is adapted from hwasan-check-memaccess.ll.