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
|
; RUN: llc -verify-machineinstrs -o - %s -mtriple=aarch64-linux-gnu -mattr=+reserve-x18 | FileCheck %s
define void @f1() shadowcallstack {
; CHECK: f1:
; CHECK-NOT: x18
; CHECK: ret
ret void
}
declare void @foo()
define void @f2() shadowcallstack {
; CHECK: f2:
; CHECK-NOT: x18
; CHECK: b foo
tail call void @foo()
ret void
}
declare i32 @bar()
define i32 @f3() shadowcallstack {
; CHECK: f3:
; CHECK: str x30, [x18], #8
; CHECK: str x30, [sp, #-16]!
%res = call i32 @bar()
%res1 = add i32 %res, 1
; CHECK: ldr x30, [sp], #16
; CHECK: ldr x30, [x18, #-8]!
; CHECK: ret
ret i32 %res
}
define i32 @f4() shadowcallstack {
; CHECK: f4:
%res1 = call i32 @bar()
%res2 = call i32 @bar()
%res3 = call i32 @bar()
%res4 = call i32 @bar()
%res12 = add i32 %res1, %res2
%res34 = add i32 %res3, %res4
%res1234 = add i32 %res12, %res34
; CHECK: ldp {{.*}}x30, [sp
; CHECK: ldr x30, [x18, #-8]!
; CHECK: ret
ret i32 %res1234
}
|
