blob: 946d1cc3171645a848a9a1844f982b3fca9c67bc [file] [log] [blame]
; RUN: llc < %s -mtriple=arm64-apple-ios -relocation-model=pic -frame-pointer=all | FileCheck %s
@__stack_chk_guard = external global i64*
; PR20558
; CHECK: adrp [[R0:x[0-9]+]], ___stack_chk_guard@GOTPAGE
; CHECK: ldr [[R1:x[0-9]+]], {{\[}}[[R0]], ___stack_chk_guard@GOTPAGEOFF{{\]}}
; Load the stack guard for the second time, just in case the previous value gets spilled.
; CHECK: adrp [[GUARD_PAGE:x[0-9]+]], ___stack_chk_guard@GOTPAGE
; CHECK: ldr [[R2:x[0-9]+]], {{\[}}[[R1]]{{\]}}
; CHECK: stur [[R2]], {{\[}}x29, [[SLOT0:[0-9#\-]+]]{{\]}}
; CHECK: ldur [[R3:x[0-9]+]], {{\[}}x29, [[SLOT0]]{{\]}}
; CHECK: ldr [[GUARD_ADDR:x[0-9]+]], {{\[}}[[GUARD_PAGE]], ___stack_chk_guard@GOTPAGEOFF{{\]}}
; CHECK: ldr [[GUARD:x[0-9]+]], {{\[}}[[GUARD_ADDR]]{{\]}}
; CHECK: cmp [[GUARD]], [[R3]]
define i32 @test_stack_guard_remat2() {
%StackGuardSlot = alloca i8*
%StackGuard = load i8*, i8** bitcast (i64** @__stack_chk_guard to i8**)
call void @llvm.stackprotector(i8* %StackGuard, i8** %StackGuardSlot)
%container = alloca [32 x i8], align 1
call void @llvm.stackprotectorcheck(i8** bitcast (i64** @__stack_chk_guard to i8**))
ret i32 -1
declare void @llvm.stackprotector(i8*, i8**)
declare void @llvm.stackprotectorcheck(i8**)