1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc --force-dwarf-frame-section %s -o - | FileCheck %s
; RUN: llc --filetype=obj %s -o - | llvm-readelf -u - | FileCheck %s --check-prefix=UNWIND
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "thumbv8.1m.main-arm-unknown-eabi"
; Check the function starts with `pacbti` and correct unwind info is emitted
define hidden i32 @_Z1fi(i32 %x) "sign-return-address"="non-leaf" "sign-return-address-key"="a_key" "branch-target-enforcement" {
; CHECK-LABEL: _Z1fi:
; CHECK: .cfi_sections .debug_frame
; CHECK-NEXT: .cfi_startproc
; CHECK-NEXT: @ %bb.0: @ %entry
; CHECK-NEXT: pacbti r12, lr, sp
; CHECK-NEXT: .save {r7, ra_auth_code, lr}
; CHECK-NEXT: push.w {r7, r12, lr}
; CHECK-NEXT: .cfi_def_cfa_offset 12
; CHECK-NEXT: .cfi_offset lr, -4
; CHECK-NEXT: .cfi_offset ra_auth_code, -8
; CHECK-NEXT: .cfi_offset r7, -12
; CHECK-NEXT: .pad #4
; CHECK-NEXT: sub sp, #4
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: adds r0, #1
; CHECK-NEXT: bl _Z1gi
; CHECK-NEXT: subs r0, #1
; CHECK-NEXT: add sp, #4
; CHECK-NEXT: pop.w {r7, r12, lr}
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
entry:
%add = add nsw i32 %x, 1
%call = tail call i32 @_Z1gi(i32 %add)
%sub = add nsw i32 %call, -1
ret i32 %sub
}
declare dso_local i32 @_Z1gi(i32)
; UNWIND-LABEL: Opcodes [
; UNWIND-NEXT: 0x00 ; vsp = vsp + 4
; UNWIND-NEXT: 0x80 0x08 ; pop {r7}
; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0x84 0x00 ; pop {lr}
|
