1; RUN: llc -mtriple=arm64-apple-ios -global-isel -o - %s | FileCheck %s
2
3define i8* @rt0(i32 %x) nounwind readnone {
4entry:
5; CHECK-LABEL: rt0:
6; CHECK:       hint #7
7; CHECK-NEXT:  mov x0, x30
8  %0 = tail call i8* @llvm.returnaddress(i32 0)
9  ret i8* %0
10}
11
12define i8* @rt0_call_clobber(i32 %x) nounwind readnone {
13entry:
14; CHECK-LABEL: rt0_call_clobber:
15; CHECK:       stp x20, x19, [sp, #-32]!
16; CHECK:       stp x29, x30, [sp, #16]
17; CHECK:       mov x19, x30
18; CHECK:       bl _foo
19; CHECK:       mov x30, x19
20; CHECK-NEXT:  hint #7
21; CHECK-NEXT:  mov x0, x30
22; CHECK-NOT:   x0
23; CHECK:       ret
24  %ret = call i32 @foo()
25  %0 = tail call i8* @llvm.returnaddress(i32 0)
26  ret i8* %0
27}
28
29define i8* @rt2() nounwind readnone {
30entry:
31; CHECK-LABEL: rt2:
32; CHECK:       ldr x[[reg:[0-9]+]], [x29]
33; CHECK:       ldr x[[reg]], [x[[reg]]]
34; CHECK:       ldr x30, [x[[reg]], #8]
35; CHECK:       hint #7
36; CHECK:       mov x0, x30
37; CHECK-NOT:   x0
38; CHECK:       ret
39  %0 = tail call i8* @llvm.returnaddress(i32 2)
40  ret i8* %0
41}
42
43
44declare i32 @foo()
45declare i8* @llvm.returnaddress(i32) nounwind readnone
46