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
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
; RUN: llc < %s -mtriple=s390x-ibm-zos | FileCheck --check-prefix=CHECK %s
; The current function's frame address is the address of
; the optional back chain slot.
define ptr @fp0() nounwind {
; CHECK-LABEL: fp0:
; CHECK: la 3,2048(4)
; CHECK-NEXT: b 2(7)
entry:
%0 = tail call ptr @llvm.frameaddress(i32 0)
ret ptr %0
}
; Check that the frame address is correct in a presence
; of a stack frame.
define ptr @fp0f() nounwind {
; CHECK-LABEL: fp0f:
; CHECK: stmg 6,7,1904(4)
; CHECK-NEXT: aghi 4,-160
; CHECK-NEXT: la 3,2048(4)
; CHECK-NEXT: lg 7,2072(4)
; CHECK-NEXT: aghi 4,160
; CHECK-NEXT: b 2(7)
entry:
%0 = alloca i64, align 8
%1 = tail call ptr @llvm.frameaddress(i32 0)
ret ptr %1
}
; Check the caller's frame address.
define ptr @fpcaller() nounwind "backchain" {
; CHECK-LABEL: fpcaller:
; CHECK: stmg 4,7,2048(4)
; CHECK-NEXT: lg 3,2048(4)
; CHECK-NEXT: lmg 4,7,2048(4)
; CHECK-NEXT: b 2(7)
entry:
%0 = tail call ptr @llvm.frameaddress(i32 1)
ret ptr %0
}
; Check the caller's frame address.
define ptr @fpcallercaller() nounwind "backchain" {
; CHECK-LABEL: fpcallercaller:
; CHECK: stmg 4,7,2048(4)
; CHECK-NEXT: lg 1,2048(4)
; CHECK-NEXT: lg 3,0(1)
; CHECK-NEXT: lmg 4,7,2048(4)
; CHECK-NEXT: b 2(7)
entry:
%0 = tail call ptr @llvm.frameaddress(i32 2)
ret ptr %0
}
declare ptr @llvm.frameaddress(i32) nounwind readnone
|
