1; RUN: llc < %s -mtriple=arm64-apple-ios -relocation-model=pic -frame-pointer=all | 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; Load the stack guard for the second time, just in case the previous value gets spilled.
10; CHECK: adrp [[GUARD_PAGE:x[0-9]+]], ___stack_chk_guard@GOTPAGE
11; CHECK: ldr  [[R2:x[0-9]+]], {{\[}}[[R1]]{{\]}}
12; CHECK: stur [[R2]], {{\[}}x29, [[SLOT0:[0-9#\-]+]]{{\]}}
13; CHECK: ldur [[R3:x[0-9]+]], {{\[}}x29, [[SLOT0]]{{\]}}
14; CHECK: ldr  [[GUARD_ADDR:x[0-9]+]], {{\[}}[[GUARD_PAGE]], ___stack_chk_guard@GOTPAGEOFF{{\]}}
15; CHECK: ldr  [[GUARD:x[0-9]+]], {{\[}}[[GUARD_ADDR]]{{\]}}
16; CHECK: cmp  [[GUARD]], [[R3]]
17; CHECK: b.ne LBB
18
19define i32 @test_stack_guard_remat2() {
20entry:
21  %StackGuardSlot = alloca i8*
22  %StackGuard = load i8*, i8** bitcast (i64** @__stack_chk_guard to i8**)
23  call void @llvm.stackprotector(i8* %StackGuard, i8** %StackGuardSlot)
24  %container = alloca [32 x i8], align 1
25  call void @llvm.stackprotectorcheck(i8** bitcast (i64** @__stack_chk_guard to i8**))
26  ret i32 -1
27}
28
29declare void @llvm.stackprotector(i8*, i8**)
30declare void @llvm.stackprotectorcheck(i8**)
31