1*9880d681SAndroid Build Coastguard Worker; RUN: llc -verify-machineinstrs -mtriple=x86_64-unknown-unknown -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s 2*9880d681SAndroid Build Coastguard Worker; RUN: llc -O0 -verify-machineinstrs -mtriple=x86_64-unknown-unknown -o - %s | FileCheck %s 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; Parameter with swiftself should be allocated to r13. 5*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: swiftself_param: 6*9880d681SAndroid Build Coastguard Worker; CHECK: movq %r13, %rax 7*9880d681SAndroid Build Coastguard Workerdefine i8 *@swiftself_param(i8* swiftself %addr0) { 8*9880d681SAndroid Build Coastguard Worker ret i8 *%addr0 9*9880d681SAndroid Build Coastguard Worker} 10*9880d681SAndroid Build Coastguard Worker 11*9880d681SAndroid Build Coastguard Worker; Check that r13 is used to pass a swiftself argument. 12*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: call_swiftself: 13*9880d681SAndroid Build Coastguard Worker; CHECK: movq %rdi, %r13 14*9880d681SAndroid Build Coastguard Worker; CHECK: callq {{_?}}swiftself_param 15*9880d681SAndroid Build Coastguard Workerdefine i8 *@call_swiftself(i8* %arg) { 16*9880d681SAndroid Build Coastguard Worker %res = call i8 *@swiftself_param(i8* swiftself %arg) 17*9880d681SAndroid Build Coastguard Worker ret i8 *%res 18*9880d681SAndroid Build Coastguard Worker} 19*9880d681SAndroid Build Coastguard Worker 20*9880d681SAndroid Build Coastguard Worker; r13 should be saved by the callee even if used for swiftself 21*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: swiftself_clobber: 22*9880d681SAndroid Build Coastguard Worker; CHECK: pushq %r13 23*9880d681SAndroid Build Coastguard Worker; ... 24*9880d681SAndroid Build Coastguard Worker; CHECK: popq %r13 25*9880d681SAndroid Build Coastguard Workerdefine i8 *@swiftself_clobber(i8* swiftself %addr0) { 26*9880d681SAndroid Build Coastguard Worker call void asm sideeffect "nop", "~{r13}"() 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 movs 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; OPT-NOT: mov{{.*}}r13 34*9880d681SAndroid Build Coastguard Worker; OPT: callq {{_?}}swiftself_param 35*9880d681SAndroid Build Coastguard Worker; OPT-NOT: mov{{.*}}r13 36*9880d681SAndroid Build Coastguard Worker; OPT-NEXT: callq {{_?}}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; We can use a tail call if the callee swiftself is the same as the caller one. 44*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: swiftself_tail: 45*9880d681SAndroid Build Coastguard Worker; OPT: jmp {{_?}}swiftself_param 46*9880d681SAndroid Build Coastguard Worker; OPT-NOT: ret 47*9880d681SAndroid Build Coastguard Workerdefine i8* @swiftself_tail(i8* swiftself %addr0) { 48*9880d681SAndroid Build Coastguard Worker call void asm sideeffect "", "~{r13}"() 49*9880d681SAndroid Build Coastguard Worker %res = tail call i8* @swiftself_param(i8* swiftself %addr0) 50*9880d681SAndroid Build Coastguard Worker ret i8* %res 51*9880d681SAndroid Build Coastguard Worker} 52*9880d681SAndroid Build Coastguard Worker 53*9880d681SAndroid Build Coastguard Worker; We can not use a tail call if the callee swiftself is not the same as the 54*9880d681SAndroid Build Coastguard Worker; caller one. 55*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: swiftself_notail: 56*9880d681SAndroid Build Coastguard Worker; CHECK: movq %rdi, %r13 57*9880d681SAndroid Build Coastguard Worker; CHECK: callq {{_?}}swiftself_param 58*9880d681SAndroid Build Coastguard Worker; CHECK: retq 59*9880d681SAndroid Build Coastguard Workerdefine i8* @swiftself_notail(i8* swiftself %addr0, i8* %addr1) nounwind { 60*9880d681SAndroid Build Coastguard Worker %res = tail call i8* @swiftself_param(i8* swiftself %addr1) 61*9880d681SAndroid Build Coastguard Worker ret i8* %res 62*9880d681SAndroid Build Coastguard Worker} 63