1 ; RUN: llc -verify-machineinstrs -mtriple=x86_64-unknown-unknown -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s
2 ; RUN: llc -O0 -verify-machineinstrs -mtriple=x86_64-unknown-unknown -o - %s | FileCheck %s
4 ; Parameter with swiftself should be allocated to r13.
5 ; CHECK-LABEL: swiftself_param:
6 ; CHECK: movq %r13, %rax
7 define i8 *@swiftself_param(i8* swiftself %addr0) {
11 ; Check that r13 is used to pass a swiftself argument.
12 ; CHECK-LABEL: call_swiftself:
13 ; CHECK: movq %rdi, %r13
14 ; CHECK: callq {{_?}}swiftself_param
15 define i8 *@call_swiftself(i8* %arg) {
16 %res = call i8 *@swiftself_param(i8* swiftself %arg)
20 ; r13 should be saved by the callee even if used for swiftself
21 ; CHECK-LABEL: swiftself_clobber:
25 define i8 *@swiftself_clobber(i8* swiftself %addr0) {
26 call void asm sideeffect "nop", "~{r13}"()
30 ; Demonstrate that we do not need any movs when calling multiple functions
31 ; with swiftself argument.
32 ; CHECK-LABEL: swiftself_passthrough:
33 ; OPT-NOT: mov{{.*}}r13
34 ; OPT: callq {{_?}}swiftself_param
35 ; OPT-NOT: mov{{.*}}r13
36 ; OPT-NEXT: callq {{_?}}swiftself_param
37 define void @swiftself_passthrough(i8* swiftself %addr0) {
38 call i8 *@swiftself_param(i8* swiftself %addr0)
39 call i8 *@swiftself_param(i8* swiftself %addr0)
43 ; We can use a tail call if the callee swiftself is the same as the caller one.
44 ; This should also work with fast-isel.
45 ; CHECK-LABEL: swiftself_tail:
46 ; CHECK: jmp {{_?}}swiftself_param
48 define i8* @swiftself_tail(i8* swiftself %addr0) {
49 call void asm sideeffect "", "~{r13}"()
50 %res = tail call i8* @swiftself_param(i8* swiftself %addr0)
54 ; We can not use a tail call if the callee swiftself is not the same as the
56 ; CHECK-LABEL: swiftself_notail:
57 ; CHECK: movq %rdi, %r13
58 ; CHECK: callq {{_?}}swiftself_param
60 define i8* @swiftself_notail(i8* swiftself %addr0, i8* %addr1) nounwind {
61 %res = tail call i8* @swiftself_param(i8* swiftself %addr1)