[llvm] [hwasan] Add intrinsics for fixed shadow on Aarch64 (PR #89319)

[Florian Mayer via llvm-commits]

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@@ -2362,13 +2362,32 @@ def int_load_relative: DefaultAttrsIntrinsic<[llvm_ptr_ty], [llvm_ptr_ty, llvm_a
 def int_asan_check_memaccess :
   Intrinsic<[],[llvm_ptr_ty, llvm_i32_ty], [ImmArg<ArgIndex<1>>]>;
 
+// HWASan intrinsics to test whether a pointer is addressable.
+//===----------------------------------------------------------------------===//
+// Parameters: Shadow base (passed in a register), pointer to be checked for validity, AccessInfo
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fmayer wrote:

Move this below Variant 1? (And copy to Variant 2?, And add Parameters to Variant 4?)

https://github.com/llvm/llvm-project/pull/89319