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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
; RUN: llc -mtriple=thumbv7m-eabi %s -o - | FileCheck %s
; Check that each outlining candidate and the outlined function are in agreement
; with regard to whether BTI insertion is enabled or not.
; volatile int a, b, c, d, e, f;
;
; int x(int p) {
; int r = (a + b) / (c + d) * e + f;
; return r + 1;
; }
;
; __attribute__((target("branch-protection=none")))
; int y(int p) {
; int r = (a + b) / (c + d) * e + f;
; return r + 2;
; }
;
; __attribute__((target("branch-protection=bti")))
; int z(int p) {
; int r = (a + b) / (c + d) * e + f;
; return r + 3;
; }
@a = hidden global i32 0, align 4
@b = hidden global i32 0, align 4
@c = hidden global i32 0, align 4
@d = hidden global i32 0, align 4
@e = hidden global i32 0, align 4
@f = hidden global i32 0, align 4
define hidden i32 @x(i32 %p) local_unnamed_addr #0 {
entry:
%0 = load volatile i32, i32* @a, align 4
%1 = load volatile i32, i32* @b, align 4
%add = add nsw i32 %1, %0
%2 = load volatile i32, i32* @c, align 4
%3 = load volatile i32, i32* @d, align 4
%add1 = add nsw i32 %3, %2
%div = sdiv i32 %add, %add1
%4 = load volatile i32, i32* @e, align 4
%mul = mul nsw i32 %4, %div
%5 = load volatile i32, i32* @f, align 4
%add2 = add nsw i32 %mul, %5
%add3 = add nsw i32 %add2, 1
ret i32 %add3
}
; CHECK-LABEL: x:
; CHECK-NOT: bti
; CHECK: bl OUTLINED_FUNCTION_0
define hidden i32 @y(i32 %p) local_unnamed_addr #1 {
entry:
%0 = load volatile i32, i32* @a, align 4
%1 = load volatile i32, i32* @b, align 4
%add = add nsw i32 %1, %0
%2 = load volatile i32, i32* @c, align 4
%3 = load volatile i32, i32* @d, align 4
%add1 = add nsw i32 %3, %2
%div = sdiv i32 %add, %add1
%4 = load volatile i32, i32* @e, align 4
%mul = mul nsw i32 %4, %div
%5 = load volatile i32, i32* @f, align 4
%add2 = add nsw i32 %mul, %5
%add3 = add nsw i32 %add2, 2
ret i32 %add3
}
; CHECK-LABEL: y:
; CHECK-NOT: bti
; CHECK: bl OUTLINED_FUNCTION_0
define hidden i32 @z(i32 %p) local_unnamed_addr #2 {
entry:
%0 = load volatile i32, i32* @a, align 4
%1 = load volatile i32, i32* @b, align 4
%add = add nsw i32 %1, %0
%2 = load volatile i32, i32* @c, align 4
%3 = load volatile i32, i32* @d, align 4
%add1 = add nsw i32 %3, %2
%div = sdiv i32 %add, %add1
%4 = load volatile i32, i32* @e, align 4
%mul = mul nsw i32 %4, %div
%5 = load volatile i32, i32* @f, align 4
%add2 = add nsw i32 %mul, %5
%add3 = add nsw i32 %add2, 3
ret i32 %add3
}
; CHECK-LABEL: z:
; CHECK bti
; CHECK-NOT: bl OUTLINED_FUNCTION
; CHECK-LABEL: OUTLINED_FUNCTION_0:
; CHECK-NOT: bti
attributes #0 = { minsize nofree norecurse nounwind optsize }
attributes #1 = { minsize nofree norecurse nounwind optsize "branch-target-enforcement"="false" }
attributes #2 = { minsize nofree norecurse nounwind optsize "branch-target-enforcement"="true" }
!llvm.module.flags = !{!0}
!0 = !{i32 1, !"branch-target-enforcement", i32 0}
|
