You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
67 lines
2.0 KiB
67 lines
2.0 KiB
4 months ago
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
||
|
|
|
||
|
|
; Parameter with swiftself should be allocated to r10.
|
||
|
|
; CHECK-LABEL: swiftself_param:
|
||
|
|
; CHECK: lgr %r2, %r10
|
||
|
|
define i8 *@swiftself_param(i8* swiftself %addr0) {
|
||
|
|
ret i8 *%addr0
|
||
|
|
}
|
||
|
|
|
||
|
|
; Check that r10 is used to pass a swiftself argument.
|
||
|
|
; CHECK-LABEL: call_swiftself:
|
||
|
|
; CHECK: lgr %r10, %r2
|
||
|
|
; CHECK: brasl %r14, swiftself_param
|
||
|
|
define i8 *@call_swiftself(i8* %arg) {
|
||
|
|
%res = call i8 *@swiftself_param(i8* swiftself %arg)
|
||
|
|
ret i8 *%res
|
||
|
|
}
|
||
|
|
|
||
|
|
; r10 should be saved by the callee even if used for swiftself
|
||
|
|
; CHECK-LABEL: swiftself_clobber:
|
||
|
|
; CHECK: stmg %r10,
|
||
|
|
; ...
|
||
|
|
; CHECK: lmg %r10,
|
||
|
|
; CHECK: br %r14
|
||
|
|
define i8 *@swiftself_clobber(i8* swiftself %addr0) {
|
||
|
|
call void asm sideeffect "", "~{r10}"()
|
||
|
|
ret i8 *%addr0
|
||
|
|
}
|
||
|
|
|
||
|
|
; Demonstrate that we do not need any loads when calling multiple functions
|
||
|
|
; with swiftself argument.
|
||
|
|
; CHECK-LABEL: swiftself_passthrough:
|
||
|
|
; CHECK-NOT: lg{{.*}}r10,
|
||
|
|
; CHECK: brasl %r14, swiftself_param
|
||
|
|
; CHECK-NOT: lg{{.*}}r10,
|
||
|
|
; CHECK-NEXT: brasl %r14, swiftself_param
|
||
|
|
define void @swiftself_passthrough(i8* swiftself %addr0) {
|
||
|
|
call i8 *@swiftself_param(i8* swiftself %addr0)
|
||
|
|
call i8 *@swiftself_param(i8* swiftself %addr0)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Normally, we can use a tail call if the callee swiftself is the same as the
|
||
|
|
; caller one. Not yet supported on SystemZ.
|
||
|
|
; CHECK-LABEL: swiftself_tail:
|
||
|
|
; CHECK: lgr %r[[REG1:[0-9]+]], %r10
|
||
|
|
; CHECK: lgr %r10, %r[[REG1]]
|
||
|
|
; CHECK: brasl %r14, swiftself_param
|
||
|
|
; CHECK: br %r14
|
||
|
|
define i8* @swiftself_tail(i8* swiftself %addr0) {
|
||
|
|
call void asm sideeffect "", "~{r10}"()
|
||
|
|
%res = tail call i8* @swiftself_param(i8* swiftself %addr0)
|
||
|
|
ret i8* %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; We can not use a tail call if the callee swiftself is not the same as the
|
||
|
|
; caller one.
|
||
|
|
; CHECK-LABEL: swiftself_notail:
|
||
|
|
; CHECK: lgr %r10, %r2
|
||
|
|
; CHECK: brasl %r14, swiftself_param
|
||
|
|
; CHECK: lmg %r10,
|
||
|
|
; CHECK: br %r14
|
||
|
|
define i8* @swiftself_notail(i8* swiftself %addr0, i8* %addr1) nounwind {
|
||
|
|
%res = tail call i8* @swiftself_param(i8* swiftself %addr1)
|
||
|
|
ret i8* %res
|
||
|
|
}
|