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D88631 added initial support for: - -mstack-protector-guard= - -mstack-protector-guard-reg= - -mstack-protector-guard-offset= flags, and D100919 extended these to AArch64. Unfortunately, these flags aren't retained for LTO. Make them module attributes rather than TargetOptions. Link: https://github.com/ClangBuiltLinux/linux/issues/1378 Reviewed By: tejohnson Differential Revision: https://reviews.llvm.org/D102742
124 lines
4.5 KiB
LLVM
124 lines
4.5 KiB
LLVM
; RUN: split-file %s %t
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; RUN: cat %t/main.ll %t/a.ll > %t/a2.ll
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; RUN: cat %t/main.ll %t/b.ll > %t/b2.ll
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; RUN: cat %t/main.ll %t/c.ll > %t/c2.ll
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; RUN: cat %t/main.ll %t/d.ll > %t/d2.ll
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; RUN: cat %t/main.ll %t/e.ll > %t/e2.ll
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; RUN: cat %t/main.ll %t/f.ll > %t/f2.ll
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; RUN: cat %t/main.ll %t/g.ll > %t/g2.ll
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; RUN: cat %t/main.ll %t/h.ll > %t/h2.ll
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; RUN: cat %t/main.ll %t/i.ll > %t/i2.ll
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; RUN: cat %t/main.ll %t/j.ll > %t/j2.ll
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; RUN: llc %t/a2.ll -verify-machineinstrs -o - | \
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; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-NO-OFFSET %s
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; RUN: llc %t/b2.ll -verify-machineinstrs -o - | \
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; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-POSITIVE-OFFSET %s
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; RUN: llc %t/c2.ll -verify-machineinstrs -o - | \
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; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-NEGATIVE-OFFSET %s
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; RUN: llc %t/d2.ll -verify-machineinstrs -o - | \
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; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-NPOT-OFFSET %s
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; RUN: llc %t/e2.ll -verify-machineinstrs -o - | \
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; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-NPOT-NEG-OFFSET %s
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; RUN: llc %t/f2.ll -verify-machineinstrs -o - | \
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; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-257-OFFSET %s
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; RUN: llc %t/g2.ll -verify-machineinstrs -o - | \
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; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-MINUS-257-OFFSET %s
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; XFAIL
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; RUN: not --crash llc %t/h2.ll -o - 2>&1 | \
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; RUN: FileCheck --check-prefix=CHECK-BAD-OFFSET %s
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; RUN: not --crash llc %t/i2.ll -o - 2>&1 | \
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; RUN: FileCheck --check-prefix=CHECK-BAD-OFFSET %s
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; RUN: not --crash llc %t/j2.ll -o - 2>&1 | \
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; RUN: FileCheck --check-prefix=CHECK-BAD-OFFSET %s
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;--- main.ll
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target triple = "aarch64-unknown-linux-gnu"
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; Verify that we `mrs` from `SP_EL0` twice, rather than load from
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; __stack_chk_guard.
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define dso_local void @foo(i64 %t) local_unnamed_addr #0 {
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; CHECK-LABEL: foo:
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; CHECK: // %bb.0: // %entry
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; CHECK-NEXT: stp x29, x30, [sp, #-16]! // 16-byte Folded Spill
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; CHECK-NEXT: mov x29, sp
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; CHECK-NEXT: sub sp, sp, #16 // =16
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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: mrs x8, SP_EL0
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; CHECK-NO-OFFSET: ldr x8, [x8]
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; CHECK-POSITIVE-OFFSET: ldr x8, [x8, #8]
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; CHECK-NEGATIVE-OFFSET: ldur x8, [x8, #-8]
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; CHECK-NPOT-OFFSET: ldur x8, [x8, #1]
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; CHECK-NPOT-NEG-OFFSET: ldur x8, [x8, #-1]
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; CHECK-257-OFFSET: add x8, x8, #257
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; CHECK-257-OFFSET-NEXT: ldr x8, [x8]
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; CHECK-MINUS-257-OFFSET: sub x8, x8, #257
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; CHECK-MINUS-257-OFFSET-NEXT: ldr x8, [x8]
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; CHECK-NEXT: lsl x9, x0, #2
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; CHECK-NEXT: add x9, x9, #15 // =15
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; CHECK-NEXT: and x9, x9, #0xfffffffffffffff0
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; CHECK-NEXT: stur x8, [x29, #-8]
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; CHECK-NEXT: mov x8, sp
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; CHECK-NEXT: sub x0, x8, x9
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; CHECK-NEXT: mov sp, x0
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; CHECK-NEXT: bl baz
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; CHECK-NEXT: ldur x8, [x29, #-8]
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; CHECK-NEXT: mrs x9, SP_EL0
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; CHECK-NO-OFFSET: ldr x9, [x9]
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; CHECK-POSITIVE-OFFSET: ldr x9, [x9, #8]
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; CHECK-NEGATIVE-OFFSET: ldur x9, [x9, #-8]
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; CHECK-NPOT-OFFSET: ldur x9, [x9, #1]
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; CHECK-NPOT-NEG-OFFSET: ldur x9, [x9, #-1]
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; CHECK-257-OFFSET: add x9, x9, #257
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; CHECK-257-OFFSET-NEXT: ldr x9, [x9]
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; CHECK-MINUS-257-OFFSET: sub x9, x9, #257
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; CHECK-MINUS-257-OFFSET-NEXT: ldr x9, [x9]
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; CHECK-NEXT: cmp x9, x8
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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: mov sp, x29
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; CHECK-NEXT: ldp x29, x30, [sp], #16 // 16-byte Folded Reload
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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-NOT: __stack_chk_guard
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entry:
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%vla = alloca i32, i64 %t, align 4
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call void @baz(i32* nonnull %vla)
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ret void
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}
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declare void @baz(i32*)
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; CHECK-BAD-OFFSET: LLVM ERROR: Unable to encode Stack Protector Guard Offset
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attributes #0 = { sspstrong }
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!llvm.module.flags = !{!1, !2, !3}
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!1 = !{i32 2, !"stack-protector-guard", !"sysreg"}
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!2 = !{i32 2, !"stack-protector-guard-reg", !"sp_el0"}
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;--- a.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 0}
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;--- b.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 8}
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;--- c.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 -8}
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;--- d.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 1}
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;--- e.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 -1}
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;--- f.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 257}
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;--- g.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 -257}
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;--- h.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 32761}
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;--- i.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 -4096}
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;--- j.ll
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!3 = !{i32 2, !"stack-protector-guard-offset", i32 4097}
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