1; RUN: llc < %s -mtriple=arm64-apple-ios -relocation-model=pic | FileCheck %s
2
3@__stack_chk_guard = external global i64*
4
5; PR20558
6
7; CHECK: adrp [[R0:x[0-9]+]], ___stack_chk_guard@GOTPAGE
8; CHECK: ldr  [[R1:x[0-9]+]], {{\[}}[[R0]], ___stack_chk_guard@GOTPAGEOFF{{\]}}
9; CHECK: ldr  [[R2:x[0-9]+]], {{\[}}[[R1]]{{\]}}
10; CHECK: stur [[R2]], {{\[}}x29, [[SLOT0:[0-9#\-]+]]{{\]}}
11; CHECK: ldur [[R3:x[0-9]+]], {{\[}}x29, [[SLOT0]]{{\]}}
12; CHECK: sub  [[R4:x[0-9]+]], [[R2]], [[R3]]
13; CHECK: cbnz [[R4]], LBB
14
15define i32 @test_stack_guard_remat2() {
16entry:
17  %StackGuardSlot = alloca i8*
18  %StackGuard = load i8** bitcast (i64** @__stack_chk_guard to i8**)
19  call void @llvm.stackprotector(i8* %StackGuard, i8** %StackGuardSlot)
20  %container = alloca [32 x i8], align 1
21  call void @llvm.stackprotectorcheck(i8** bitcast (i64** @__stack_chk_guard to i8**))
22  ret i32 -1
23}
24
25declare void @llvm.stackprotector(i8*, i8**)
26declare void @llvm.stackprotectorcheck(i8**)
27