2016-04-14 05:43:16 +08:00
|
|
|
; RUN: llc -verify-machineinstrs -mtriple=aarch64-apple-ios -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s
|
|
|
|
; RUN: llc -O0 -verify-machineinstrs -mtriple=aarch64-apple-ios -o - %s | FileCheck %s
|
|
|
|
; RUN: llc -verify-machineinstrs -mtriple=aarch64-unknown-linux-gnu -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s
|
2016-03-30 01:37:21 +08:00
|
|
|
|
2016-04-14 05:43:16 +08:00
|
|
|
; Parameter with swiftself should be allocated to x20.
|
|
|
|
; CHECK-LABEL: swiftself_param:
|
|
|
|
; CHECK: mov x0, x20
|
|
|
|
; CHECK-NEXT: ret
|
|
|
|
define i8* @swiftself_param(i8* swiftself %addr0) {
|
|
|
|
ret i8 *%addr0
|
|
|
|
}
|
2016-03-30 01:37:21 +08:00
|
|
|
|
2016-04-14 05:43:16 +08:00
|
|
|
; Check that x20 is used to pass a swiftself argument.
|
|
|
|
; CHECK-LABEL: call_swiftself:
|
|
|
|
; CHECK: mov x20, x0
|
|
|
|
; CHECK: bl {{_?}}swiftself_param
|
|
|
|
; CHECK: ret
|
|
|
|
define i8 *@call_swiftself(i8* %arg) {
|
|
|
|
%res = call i8 *@swiftself_param(i8* swiftself %arg)
|
|
|
|
ret i8 *%res
|
2016-03-30 01:37:21 +08:00
|
|
|
}
|
|
|
|
|
2016-04-14 05:43:16 +08:00
|
|
|
; x20 should be saved by the callee even if used for swiftself
|
|
|
|
; CHECK-LABEL: swiftself_clobber:
|
|
|
|
; CHECK: {{stp|str}} {{.*}}x20{{.*}}sp
|
|
|
|
; ...
|
|
|
|
; CHECK: {{ldp|ldr}} {{.*}}x20{{.*}}sp
|
|
|
|
; CHECK: ret
|
|
|
|
define i8 *@swiftself_clobber(i8* swiftself %addr0) {
|
|
|
|
call void asm sideeffect "", "~{x20}"()
|
|
|
|
ret i8 *%addr0
|
|
|
|
}
|
2016-03-30 01:37:21 +08:00
|
|
|
|
2016-04-14 05:43:16 +08:00
|
|
|
; Demonstrate that we do not need any movs when calling multiple functions
|
|
|
|
; with swiftself argument.
|
|
|
|
; CHECK-LABEL: swiftself_passthrough:
|
|
|
|
; OPT-NOT: mov{{.*}}x20
|
|
|
|
; OPT: bl {{_?}}swiftself_param
|
|
|
|
; OPT-NOT: mov{{.*}}x20
|
|
|
|
; OPT-NEXT: bl {{_?}}swiftself_param
|
|
|
|
; OPT: ret
|
|
|
|
define void @swiftself_passthrough(i8* swiftself %addr0) {
|
|
|
|
call i8 *@swiftself_param(i8* swiftself %addr0)
|
|
|
|
call i8 *@swiftself_param(i8* swiftself %addr0)
|
|
|
|
ret void
|
|
|
|
}
|
2016-03-30 01:37:21 +08:00
|
|
|
|
2016-04-14 05:43:16 +08:00
|
|
|
; We can use a tail call if the callee swiftself is the same as the caller one.
|
|
|
|
; CHECK-LABEL: swiftself_tail:
|
|
|
|
; OPT: b {{_?}}swiftself_param
|
|
|
|
; OPT-NOT: ret
|
|
|
|
define i8* @swiftself_tail(i8* swiftself %addr0) {
|
|
|
|
call void asm sideeffect "", "~{x20}"()
|
|
|
|
%res = tail call i8* @swiftself_param(i8* swiftself %addr0)
|
|
|
|
ret i8* %res
|
|
|
|
}
|
2016-03-30 01:37:21 +08:00
|
|
|
|
2016-04-14 05:43:16 +08:00
|
|
|
; We can not use a tail call if the callee swiftself is not the same as the
|
|
|
|
; caller one.
|
|
|
|
; CHECK-LABEL: swiftself_notail:
|
|
|
|
; CHECK: mov x20, x0
|
|
|
|
; CHECK: bl {{_?}}swiftself_param
|
|
|
|
; CHECK: ret
|
|
|
|
define i8* @swiftself_notail(i8* swiftself %addr0, i8* %addr1) nounwind {
|
|
|
|
%res = tail call i8* @swiftself_param(i8* swiftself %addr1)
|
|
|
|
ret i8* %res
|
2016-03-30 01:37:21 +08:00
|
|
|
}
|