1*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Worker; Parameter with swiftself should be allocated to r10. 4*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: swiftself_param: 5*9880d681SAndroid Build Coastguard Worker; CHECK: lgr %r2, %r10 6*9880d681SAndroid Build Coastguard Workerdefine i8 *@swiftself_param(i8* swiftself %addr0) { 7*9880d681SAndroid Build Coastguard Worker ret i8 *%addr0 8*9880d681SAndroid Build Coastguard Worker} 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard Worker; Check that r10 is used to pass a swiftself argument. 11*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: call_swiftself: 12*9880d681SAndroid Build Coastguard Worker; CHECK: lgr %r10, %r2 13*9880d681SAndroid Build Coastguard Worker; CHECK: brasl %r14, swiftself_param 14*9880d681SAndroid Build Coastguard Workerdefine i8 *@call_swiftself(i8* %arg) { 15*9880d681SAndroid Build Coastguard Worker %res = call i8 *@swiftself_param(i8* swiftself %arg) 16*9880d681SAndroid Build Coastguard Worker ret i8 *%res 17*9880d681SAndroid Build Coastguard Worker} 18*9880d681SAndroid Build Coastguard Worker 19*9880d681SAndroid Build Coastguard Worker; r10 should be saved by the callee even if used for swiftself 20*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: swiftself_clobber: 21*9880d681SAndroid Build Coastguard Worker; CHECK: stmg %r10, 22*9880d681SAndroid Build Coastguard Worker; ... 23*9880d681SAndroid Build Coastguard Worker; CHECK: lmg %r10, 24*9880d681SAndroid Build Coastguard Worker; CHECK: br %r14 25*9880d681SAndroid Build Coastguard Workerdefine i8 *@swiftself_clobber(i8* swiftself %addr0) { 26*9880d681SAndroid Build Coastguard Worker call void asm sideeffect "", "~{r10}"() 27*9880d681SAndroid Build Coastguard Worker ret i8 *%addr0 28*9880d681SAndroid Build Coastguard Worker} 29*9880d681SAndroid Build Coastguard Worker 30*9880d681SAndroid Build Coastguard Worker; Demonstrate that we do not need any loads when calling multiple functions 31*9880d681SAndroid Build Coastguard Worker; with swiftself argument. 32*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: swiftself_passthrough: 33*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: lg{{.*}}r10, 34*9880d681SAndroid Build Coastguard Worker; CHECK: brasl %r14, swiftself_param 35*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: lg{{.*}}r10, 36*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: brasl %r14, swiftself_param 37*9880d681SAndroid Build Coastguard Workerdefine void @swiftself_passthrough(i8* swiftself %addr0) { 38*9880d681SAndroid Build Coastguard Worker call i8 *@swiftself_param(i8* swiftself %addr0) 39*9880d681SAndroid Build Coastguard Worker call i8 *@swiftself_param(i8* swiftself %addr0) 40*9880d681SAndroid Build Coastguard Worker ret void 41*9880d681SAndroid Build Coastguard Worker} 42*9880d681SAndroid Build Coastguard Worker 43*9880d681SAndroid Build Coastguard Worker; Normally, we can use a tail call if the callee swiftself is the same as the 44*9880d681SAndroid Build Coastguard Worker; caller one. Not yet supported on SystemZ. 45*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: swiftself_tail: 46*9880d681SAndroid Build Coastguard Worker; CHECK: lgr %r[[REG1:[0-9]+]], %r10 47*9880d681SAndroid Build Coastguard Worker; CHECK: lgr %r10, %r[[REG1]] 48*9880d681SAndroid Build Coastguard Worker; CHECK: brasl %r14, swiftself_param 49*9880d681SAndroid Build Coastguard Worker; CHECK: br %r14 50*9880d681SAndroid Build Coastguard Workerdefine i8* @swiftself_tail(i8* swiftself %addr0) { 51*9880d681SAndroid Build Coastguard Worker call void asm sideeffect "", "~{r10}"() 52*9880d681SAndroid Build Coastguard Worker %res = tail call i8* @swiftself_param(i8* swiftself %addr0) 53*9880d681SAndroid Build Coastguard Worker ret i8* %res 54*9880d681SAndroid Build Coastguard Worker} 55*9880d681SAndroid Build Coastguard Worker 56*9880d681SAndroid Build Coastguard Worker; We can not use a tail call if the callee swiftself is not the same as the 57*9880d681SAndroid Build Coastguard Worker; caller one. 58*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: swiftself_notail: 59*9880d681SAndroid Build Coastguard Worker; CHECK: lgr %r10, %r2 60*9880d681SAndroid Build Coastguard Worker; CHECK: brasl %r14, swiftself_param 61*9880d681SAndroid Build Coastguard Worker; CHECK: lmg %r10, 62*9880d681SAndroid Build Coastguard Worker; CHECK: br %r14 63*9880d681SAndroid Build Coastguard Workerdefine i8* @swiftself_notail(i8* swiftself %addr0, i8* %addr1) nounwind { 64*9880d681SAndroid Build Coastguard Worker %res = tail call i8* @swiftself_param(i8* swiftself %addr1) 65*9880d681SAndroid Build Coastguard Worker ret i8* %res 66*9880d681SAndroid Build Coastguard Worker} 67