; 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 ptr@swiftself_param(ptr swiftself %addr0) { ret ptr %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 ptr@call_swiftself(ptr %arg) { %res = call ptr@swiftself_param(ptr swiftself %arg) ret ptr %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 ptr@swiftself_clobber(ptr swiftself %addr0) { call void asm sideeffect "", "~{r10}"() ret ptr %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(ptr swiftself %addr0) { call ptr@swiftself_param(ptr swiftself %addr0) call ptr@swiftself_param(ptr 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 ptr @swiftself_tail(ptr swiftself %addr0) { call void asm sideeffect "", "~{r10}"() %res = tail call ptr @swiftself_param(ptr swiftself %addr0) ret ptr %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 ptr @swiftself_notail(ptr swiftself %addr0, ptr %addr1) nounwind { %res = tail call ptr @swiftself_param(ptr swiftself %addr1) ret ptr %res }