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
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
; RUN: llc -mtriple=thumbv8m.main-none-eabi %s -o - | FileCheck %s
define i32 @test_leaf(i32 %arg0, i32 %arg1, i32 %arg2, i32 %arg3, i32 %x) "sign-return-address"="all" {
; CHECK-LABEL: test_leaf:
; CHECK: @ %bb.0: @ %entry
; CHECK-NEXT: pac r12, lr, sp
; CHECK-NEXT: .save {ra_auth_code}
; CHECK-NEXT: str r12, [sp, #-4]!
; CHECK-NEXT: ldr r0, [sp, #4]
; CHECK-NEXT: ldr r12, [sp], #4
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
entry:
ret i32 %x
}
define i32 @test_non_leaf(i32 %arg0, i32 %arg1, i32 %arg2, i32 %arg3, i32 %x) "sign-return-address"="all" {
; CHECK-LABEL: test_non_leaf:
; CHECK: @ %bb.0: @ %entry
; CHECK-NEXT: pac r12, lr, sp
; CHECK-NEXT: .save {r7, ra_auth_code, lr}
; CHECK-NEXT: push.w {r7, r12, lr}
; CHECK-NEXT: .pad #4
; CHECK-NEXT: sub sp, #4
; CHECK-NEXT: bl otherfn
; CHECK-NEXT: ldr r0, [sp, #16]
; CHECK-NEXT: add sp, #4
; CHECK-NEXT: pop.w {r7, r12, lr}
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
entry:
call void @otherfn()
ret i32 %x
}
declare void @otherfn(...)
!llvm.module.flags = !{!0, !1, !2}
!0 = !{i32 8, !"branch-target-enforcement", i32 0}
!1 = !{i32 8, !"sign-return-address", i32 1}
!2 = !{i32 8, !"sign-return-address-all", i32 1}
|
