| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=arm64-apple-ios -relocation-model=pic -frame-pointer=all | FileCheck %s |
| |
| @__stack_chk_guard = external global i64* |
| |
| ; PR20558 |
| |
| ; Load the stack guard for the second time, just in case the previous value gets spilled. |
| define i32 @test_stack_guard_remat2() ssp { |
| ; CHECK-LABEL: test_stack_guard_remat2: |
| ; CHECK: ; %bb.0: ; %entry |
| ; CHECK-NEXT: sub sp, sp, #64 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 64 |
| ; CHECK-NEXT: stp x29, x30, [sp, #48] ; 16-byte Folded Spill |
| ; CHECK-NEXT: add x29, sp, #48 |
| ; CHECK-NEXT: .cfi_def_cfa w29, 16 |
| ; CHECK-NEXT: .cfi_offset w30, -8 |
| ; CHECK-NEXT: .cfi_offset w29, -16 |
| ; CHECK-NEXT: Lloh0: |
| ; CHECK-NEXT: adrp x8, ___stack_chk_guard@GOTPAGE |
| ; CHECK-NEXT: Lloh1: |
| ; CHECK-NEXT: adrp x9, ___stack_chk_guard@GOTPAGE |
| ; CHECK-NEXT: Lloh2: |
| ; CHECK-NEXT: ldr x8, [x8, ___stack_chk_guard@GOTPAGEOFF] |
| ; CHECK-NEXT: Lloh3: |
| ; CHECK-NEXT: ldr x9, [x9, ___stack_chk_guard@GOTPAGEOFF] |
| ; CHECK-NEXT: Lloh4: |
| ; CHECK-NEXT: ldr x8, [x8] |
| ; CHECK-NEXT: Lloh5: |
| ; CHECK-NEXT: ldr x9, [x9] |
| ; CHECK-NEXT: str x8, [sp] |
| ; CHECK-NEXT: Lloh6: |
| ; CHECK-NEXT: adrp x8, ___stack_chk_guard@GOTPAGE |
| ; CHECK-NEXT: stur x9, [x29, #-8] |
| ; CHECK-NEXT: Lloh7: |
| ; CHECK-NEXT: ldr x8, [x8, ___stack_chk_guard@GOTPAGEOFF] |
| ; CHECK-NEXT: ldur x9, [x29, #-8] |
| ; CHECK-NEXT: Lloh8: |
| ; CHECK-NEXT: ldr x8, [x8] |
| ; CHECK-NEXT: cmp x8, x9 |
| ; CHECK-NEXT: b.ne LBB0_2 |
| ; CHECK-NEXT: ; %bb.1: ; %entry |
| ; CHECK-NEXT: ldp x29, x30, [sp, #48] ; 16-byte Folded Reload |
| ; CHECK-NEXT: mov w0, #-1 |
| ; CHECK-NEXT: add sp, sp, #64 |
| ; CHECK-NEXT: ret |
| ; CHECK-NEXT: LBB0_2: ; %entry |
| ; CHECK-NEXT: bl ___stack_chk_fail |
| ; CHECK-NEXT: .loh AdrpLdrGotLdr Lloh6, Lloh7, Lloh8 |
| ; CHECK-NEXT: .loh AdrpLdrGotLdr Lloh1, Lloh3, Lloh5 |
| ; CHECK-NEXT: .loh AdrpLdrGotLdr Lloh0, Lloh2, Lloh4 |
| 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**) ssp |
| declare void @llvm.stackprotectorcheck(i8**) ssp |