1; RUN: llc -mtriple x86_64-unknown-windows-msvc %s -o - | FileCheck %s
2
3declare swifttailcc void @callee()
4
5define swifttailcc void @swift_tail() {
6  call void asm "","~{r14}"()
7  tail call swifttailcc void @callee()
8  ret void
9}
10
11; CHECK-LABEL: swift_tail:
12; CHECK-NOT: popq %r14
13
14define void @has_swift_async(i8* swiftasync %contet) {
15  call void asm "","~{r14}"()
16  ret void
17}
18
19; CHECK-LABEL: has_swift_async:
20; CHECK: popq    %r14
21
22; It's impossible to get a tail call from a function without a swiftasync
23; parameter to one with unless the CC is swifttailcc. So it doesn't matter
24; whether r14 is callee-saved in this case.
25define void @calls_swift_async() {
26  call void asm "","~{r14}"()
27  tail call void @has_swift_async(i8* swiftasync null)
28  ret void
29}
30
31; CHECK-LABEL: calls_swift_async:
32; CHECK-NOT jmpq has_swift_async
33
34define swifttailcc void @no_preserve_swiftself() {
35  call void asm "","~{r13}"()
36  ret void
37}
38
39; CHECK-LABEL: no_preserve_swiftself:
40; CHECK-NOT: popq %r13
41
42declare swifttailcc i8* @swift_self(i8* swiftasync %context, i8* swiftself %self)
43
44define swiftcc i8* @call_swift_self(i8* swiftself %self, i8* %context) {
45  ; call void asm "","~{r13}"()
46  ; We get a push r13 but why not with the call below?
47  %res = call swifttailcc i8* @swift_self(i8* swiftasync %context, i8* swiftself %self)
48  ret i8* %res
49}
50
51; CHECK-LABEL: call_swift_self:
52; CHECK: pushq %r13
53