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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
; RUN: split-file %s %t
; RUN: cat %t/main.ll %t/a.ll > %t/a2.ll
; RUN: cat %t/main.ll %t/b.ll > %t/b2.ll
; RUN: cat %t/main.ll %t/c.ll > %t/c2.ll
; RUN: cat %t/main.ll %t/d.ll > %t/d2.ll
; RUN: cat %t/main.ll %t/e.ll > %t/e2.ll
; RUN: cat %t/main.ll %t/f.ll > %t/f2.ll
; RUN: cat %t/main.ll %t/g.ll > %t/g2.ll
; RUN: cat %t/main.ll %t/h.ll > %t/h2.ll
; RUN: cat %t/main.ll %t/i.ll > %t/i2.ll
; RUN: cat %t/main.ll %t/j.ll > %t/j2.ll
; RUN: llc %t/a2.ll -verify-machineinstrs -o - | \
; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-NO-OFFSET %s
; RUN: llc %t/b2.ll -verify-machineinstrs -o - | \
; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-POSITIVE-OFFSET %s
; RUN: llc %t/c2.ll -verify-machineinstrs -o - | \
; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-NEGATIVE-OFFSET %s
; RUN: llc %t/d2.ll -verify-machineinstrs -o - | \
; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-NPOT-OFFSET %s
; RUN: llc %t/e2.ll -verify-machineinstrs -o - | \
; RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-NPOT-NEG-OFFSET %s
; RUN: llc %t/f2.ll -verify-machineinstrs -o - | \
; RUN: FileCheck --check-prefix=CHECK-ADD --check-prefix=CHECK-257-OFFSET %s
; RUN: llc %t/g2.ll -verify-machineinstrs -o - | \
; RUN: FileCheck --check-prefix=CHECK-ADD --check-prefix=CHECK-MINUS-257-OFFSET %s
; XFAIL
; RUN: not --crash llc %t/h2.ll -o - 2>&1 | \
; RUN: FileCheck --check-prefix=CHECK-BAD-OFFSET %s
; RUN: not --crash llc %t/i2.ll -o - 2>&1 | \
; RUN: FileCheck --check-prefix=CHECK-BAD-OFFSET %s
; RUN: not --crash llc %t/j2.ll -o - 2>&1 | \
; RUN: FileCheck --check-prefix=CHECK-BAD-OFFSET %s
;--- main.ll
target triple = "aarch64-unknown-linux-gnu"
; Verify that we `mrs` from `SP_EL0` twice, rather than load from
; __stack_chk_guard.
define dso_local void @foo(i64 %t) local_unnamed_addr #0 {
; CHECK-LABEL: foo: // @foo
; CHECK: .cfi_startproc
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: stp x29, x30, [sp, #-16]! // 16-byte Folded Spill
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: mov x29, sp
; CHECK-NEXT: .cfi_def_cfa w29, 16
; CHECK-NEXT: .cfi_offset w30, -8
; CHECK-NEXT: .cfi_offset w29, -16
; CHECK-NEXT: .cfi_remember_state
; CHECK-NEXT: sub sp, sp, #16
; CHECK-NEXT: mrs x8, SP_EL0
; CHECK-NEXT: lsl x9, x0, #2
; CHECK-NO-OFFSET: ldr x8, [x8]
; CHECK-POSITIVE-OFFSET: ldr x8, [x8, #8]
; CHECK-NEGATIVE-OFFSET: ldur x8, [x8, #-8]
; CHECK-NPOT-OFFSET: ldur x8, [x8, #1]
; CHECK-NPOT-NEG-OFFSET: ldur x8, [x8, #-1]
; CHECK-NEXT: add x9, x9, #15
; CHECK-NEXT: stur x8, [x29, #-8]
; CHECK-NEXT mov x8, sp
; CHECK-NEXT and x9, x9, #0xfffffffffffffff0
; CHECK-NEXT sub x0, x8, x9
; CHECK-NEXT mov sp, x0
; CHECK-NEXT bl baz
; CHECK-NEXT mrs x8, SP_EL0
; CHECK-NO-OFFSET: ldr x8, [x8]
; CHECK-POSITIVE-OFFSET: ldr x8, [x8, #8]
; CHECK-NEGATIVE-OFFSET: ldur x8, [x8, #-8]
; CHECK-NPOT-OFFSET: ldur x8, [x8, #1]
; CHECK-NPOT-NEG-OFFSET: ldur x8, [x8, #-1]
; CHECK-NEXT: ldur x9, [x29, #-8]
; CHECK-NEXT: cmp x8, x9
; CHECK-NEXT: b.ne .LBB0_2
; CHECK-NEXT: // %bb.1: // %entry
; CHECK-NEXT: mov sp, x29
; CHECK-NEXT: .cfi_def_cfa wsp, 16
; CHECK-NEXT: ldp x29, x30, [sp], #16 // 16-byte Folded Reload
; CHECK-NEXT: .cfi_def_cfa_offset 0
; CHECK-NEXT: .cfi_restore w30
; CHECK-NEXT: .cfi_restore w29
; CHECK-NEXT: ret
; CHECK-NEXT: .LBB0_2: // %entry
; CHECK-NEXT: .cfi_restore_state
; CHECK-NEXT: bl __stack_chk_fail
; CHECK-NEXT: .Lfunc_end0:
; CHECK-NEXT: .size foo, .Lfunc_end0-foo
; CHECK-NEXT: .cfi_endproc
; CHECK-NEXT: // -- End function
; CHECK-NEXT: .section ".note.GNU-stack","",@progbits
; CHECK-ADD: stp x29, x30, [sp, #-16]! // 16-byte Folded Spill
; CHECK-ADD-NEXT: .cfi_def_cfa_offset 16
; CHECK-ADD-NEXT: mov x29, sp
; CHECK-ADD-NEXT: .cfi_def_cfa w29, 16
; CHECK-ADD-NEXT: .cfi_offset w30, -8
; CHECK-ADD-NEXT: .cfi_offset w29, -16
; CHECK-ADD-NEXT: .cfi_remember_state
; CHECK-ADD-NEXT: sub sp, sp, #16
; CHECK-ADD-NEXT: mrs x8, SP_EL0
; CHECK-ADD-NEXT: lsl x9, x0, #2
; CHECK-MINUS-257-OFFSET: sub x8, x8, #257
; CHECK-257-OFFSET: add x8, x8, #257
; CHECK-ADD-NEXT: ldr x8, [x8]
; CHECK-ADD-NEXT: add x9, x9, #15
; CHECK-ADD-NEXT: and x9, x9, #0xfffffffffffffff0
; CHECK-ADD-NEXT: stur x8, [x29, #-8]
; CHECK-ADD-NEXT: mov x8, sp
; CHECK-ADD-NEXT: sub x0, x8, x9
; CHECK-ADD-NEXT: mov sp, x0
; CHECK-ADD-NEXT: bl baz
; CHECK-ADD-NEXT: mrs x8, SP_EL0
; CHECK-257-OFFSET: add x8, x8, #257
; CHECK-MINUS-257-OFFSET: sub x8, x8, #257
; CHECK-ADD-NEXT: ldr x8, [x8]
; CHECK-ADD-NEXT: ldur x9, [x29, #-8]
; CHECK-ADD-NEXT: cmp x8, x9
; CHECK-ADD-NEXT: b.ne .LBB0_2
; CHECK-ADD-NEXT: // %bb.1: // %entry
; CHECK-ADD-NEXT: mov sp, x29
; CHECK-ADD-NEXT: .cfi_def_cfa wsp, 16
; CHECK-ADD-NEXT: ldp x29, x30, [sp], #16 // 16-byte Folded Reload
; CHECK-ADD-NEXT: .cfi_def_cfa_offset 0
; CHECK-ADD-NEXT: .cfi_restore w30
; CHECK-ADD-NEXT: .cfi_restore w29
; CHECK-ADD-NEXT: ret
; CHECK-ADD-NEXT: .LBB0_2: // %entry
; CHECK-ADD-NEXT: .cfi_restore_state
; CHECK-ADD-NEXT: bl __stack_chk_fail
; CHECK-ADD-NEXT: .Lfunc_end0:
; CHECK-ADD-NEXT: .size foo, .Lfunc_end0-foo
; CHECK-ADD-NEXT: .cfi_endproc
; CHECK-ADD-NEXT: // -- End function
; CHECK-ADD-NEXT: .section ".note.GNU-stack","",@progbits
entry:
%vla = alloca i32, i64 %t, align 4
call void @baz(ptr nonnull %vla)
ret void
}
declare void @baz(ptr)
; CHECK-BAD-OFFSET: LLVM ERROR: Unable to encode Stack Protector Guard Offset
attributes #0 = { sspstrong uwtable }
!llvm.module.flags = !{!1, !2, !3}
!1 = !{i32 2, !"stack-protector-guard", !"sysreg"}
!2 = !{i32 2, !"stack-protector-guard-reg", !"sp_el0"}
;--- a.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 0}
;--- b.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 8}
;--- c.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 -8}
;--- d.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 1}
;--- e.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 -1}
;--- f.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 257}
;--- g.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 -257}
;--- h.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 32761}
;--- i.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 -4096}
;--- j.ll
!3 = !{i32 2, !"stack-protector-guard-offset", i32 4097}
|
