1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
2 ; RUN: llc -filetype asm -o - %s | FileCheck %s
4 ; This shows that CodeGen for AArch64 will elide the tag check when lowering
5 ; the HWASan memaccess intrinsic for null pointers.
7 ; N.B. The HWASan pass will normally omit the memaccess intrinsic if the
8 ; pointer is already statically known to be null.
10 ; The source was generated from llvm/test/Instrumentation/HWAddressSanitizer/zero-ptr.ll
11 ; with the memaccess deliberately retained.
13 ; ModuleID = '<stdin>'
14 source_filename = "<stdin>"
15 target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
16 target triple = "aarch64--linux-android10000"
18 $hwasan.module_ctor = comdat any
20 @__start_hwasan_globals = external hidden constant [0 x i8]
21 @__stop_hwasan_globals = external hidden constant [0 x i8]
22 @hwasan.note = private constant { i32, i32, i32, [8 x i8], i32, i32 } { i32 8, i32 8, i32 3, [8 x i8] c"LLVM\00\00\00\00", i32 trunc (i64 sub (i64 ptrtoint (ptr @__start_hwasan_globals to i64), i64 ptrtoint (ptr @hwasan.note to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr @__stop_hwasan_globals to i64), i64 ptrtoint (ptr @hwasan.note to i64)) to i32) }, section ".note.hwasan.globals", comdat($hwasan.module_ctor), align 4
24 ; Function Attrs: sanitize_hwaddress
25 define void @test_store_to_zeroptr() #0 {
26 ; CHECK-LABEL: test_store_to_zeroptr:
27 ; CHECK: // %bb.0: // %entry
28 ; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
29 ; CHECK-NEXT: .cfi_def_cfa_offset 16
30 ; CHECK-NEXT: .cfi_offset w30, -16
31 ; CHECK-NEXT: mov x8, xzr
32 ; CHECK-NEXT: mov w9, #42 // =0x2a
33 ; CHECK-NEXT: str x9, [x8]
34 ; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
37 %.hwasan.shadow = call ptr asm "", "=r,0"(ptr null)
38 %b = inttoptr i64 0 to ptr
39 call void @llvm.hwasan.check.memaccess.shortgranules.fixedshadow(ptr %b, i32 19, i64 0)
40 store i64 42, ptr %b, align 8
44 ; Function Attrs: nounwind
45 declare void @llvm.hwasan.check.memaccess.shortgranules.fixedshadow(ptr, i32 immarg, i64 immarg) #1
47 attributes #0 = { sanitize_hwaddress }
48 attributes #1 = { nounwind }
50 declare void @__hwasan_init()
52 ; Function Attrs: nounwind
53 define internal void @hwasan.module_ctor() #1 comdat {
54 ; CHECK-LABEL: hwasan.module_ctor:
56 ; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
57 ; CHECK-NEXT: bl __hwasan_init
58 ; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
60 call void @__hwasan_init()
64 !llvm.module.flags = !{!1}
66 !0 = !{ptr @hwasan.note}
67 !1 = !{i32 4, !"nosanitize_hwaddress", i32 1}