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

[Vitaly Buka via llvm-commits]

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@@ -0,0 +1,144 @@
+; RUN: llc --hwasan-mapping-offset=4398046511104 < %s | FileCheck %s
+
+target triple = "aarch64--linux-android"
+
+define ptr @f1(ptr %x0, ptr %x1) {
+  ; CHECK: f1:
+  ; CHECK: str x30, [sp, #-16]!
+  ; CHECK-NEXT: .cfi_def_cfa_offset 16
+  ; CHECK-NEXT: .cfi_offset w30, -16
+  ; CHECK-NEXT: bl __hwasan_check_x1_1
+  ; CHECK-NEXT: mov x0, x1
+  ; CHECK-NEXT: ldr x30, [sp], #16
+  ; CHECK-NEXT: ret
+  call void @llvm.hwasan.check.memaccess.fixedshadow(ptr %x1, i32 1)
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vitalybuka wrote:

Because you have no these intrinsics, you can't precommit as-is
so try precommit with lvm.hwasan.check.memaccess() version and the same fixed shadow address

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