55 lines
2 KiB
LLVM
55 lines
2 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=arm64-apple-ios -relocation-model=pic -frame-pointer=all | FileCheck %s
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@__stack_chk_guard = external global ptr
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; PR20558
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; Load the stack guard for the second time, just in case the previous value gets spilled.
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define i32 @test_stack_guard_remat2() ssp {
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; CHECK-LABEL: test_stack_guard_remat2:
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; CHECK: ; %bb.0: ; %entry
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; CHECK-NEXT: sub sp, sp, #64
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; CHECK-NEXT: stp x29, x30, [sp, #48] ; 16-byte Folded Spill
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; CHECK-NEXT: add x29, sp, #48
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; CHECK-NEXT: .cfi_def_cfa w29, 16
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; CHECK-NEXT: .cfi_offset w30, -8
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; CHECK-NEXT: .cfi_offset w29, -16
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; CHECK-NEXT: Lloh0:
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; CHECK-NEXT: adrp x8, ___stack_chk_guard@GOTPAGE
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; CHECK-NEXT: Lloh1:
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; CHECK-NEXT: adrp x9, ___stack_chk_guard@GOTPAGE
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; CHECK-NEXT: Lloh2:
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; CHECK-NEXT: ldr x8, [x8, ___stack_chk_guard@GOTPAGEOFF]
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; CHECK-NEXT: Lloh3:
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; CHECK-NEXT: ldr x9, [x9, ___stack_chk_guard@GOTPAGEOFF]
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; CHECK-NEXT: Lloh4:
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; CHECK-NEXT: ldr x8, [x8]
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; CHECK-NEXT: Lloh5:
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; CHECK-NEXT: ldr x9, [x9]
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; CHECK-NEXT: str x8, [sp]
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; CHECK-NEXT: stur x9, [x29, #-8]
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; CHECK-NEXT: ldur x9, [x29, #-8]
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; CHECK-NEXT: cmp x8, x9
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; CHECK-NEXT: b.ne LBB0_2
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; CHECK-NEXT: ; %bb.1: ; %entry
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; CHECK-NEXT: ldp x29, x30, [sp, #48] ; 16-byte Folded Reload
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; CHECK-NEXT: mov w0, #-1
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; CHECK-NEXT: add sp, sp, #64
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; CHECK-NEXT: ret
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; CHECK-NEXT: LBB0_2: ; %entry
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; CHECK-NEXT: bl ___stack_chk_fail
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; CHECK-NEXT: .loh AdrpLdrGotLdr Lloh1, Lloh3, Lloh5
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; CHECK-NEXT: .loh AdrpLdrGotLdr Lloh0, Lloh2, Lloh4
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entry:
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%StackGuardSlot = alloca ptr
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%StackGuard = load ptr, ptr @__stack_chk_guard
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call void @llvm.stackprotector(ptr %StackGuard, ptr %StackGuardSlot)
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%container = alloca [32 x i8], align 1
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call void @llvm.stackprotectorcheck(ptr @__stack_chk_guard)
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ret i32 -1
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}
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declare void @llvm.stackprotector(ptr, ptr) ssp
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declare void @llvm.stackprotectorcheck(ptr) ssp
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