| ; RUN: llc < %s -mtriple=arm64-apple-ios -relocation-model=pic -disable-fp-elim | 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]] |
| ; CHECK: b.ne LBB |
| |
| define i32 @test_stack_guard_remat2() { |
| entry: |
| %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**) |
