[llvm] [hwasan] Optimize outlined memaccess for fixed shadow on Aarch64 (PR #88544)

[Vitaly Buka via llvm-commits]

================
@@ -2367,6 +2367,10 @@ def int_hwasan_check_memaccess :
 def int_hwasan_check_memaccess_shortgranules :
   Intrinsic<[], [llvm_ptr_ty, llvm_ptr_ty, llvm_i32_ty],
             [ImmArg<ArgIndex<2>>]>;
+def int_hwasan_check_memaccess_fixedshadow_shortgranules :
----------------
vitalybuka wrote:

Can you document meaning of arguments.
I expected we are going to discard one of the arguments, like `int_asan_check_memaccess`.

https://github.com/llvm/llvm-project/pull/88544