1 ; RUN: llc < %s -mtriple=arm64-apple-ios -relocation-model=pic -disable-fp-elim | 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 19 define i32 @test_stack_guard_remat2() { 20 entry: 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 29 declare void @llvm.stackprotector(i8*, i8**) 30 declare void @llvm.stackprotectorcheck(i8**) 31
