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1; RUN: llc -verify-machineinstrs -mtriple=x86_64-unknown-unknown -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s2; RUN: llc -O0 -verify-machineinstrs -mtriple=x86_64-unknown-unknown -o - %s | FileCheck %s3 4; Parameter with swiftself should be allocated to r13.5; CHECK-LABEL: swiftself_param:6; CHECK: movq %r13, %rax7define ptr@swiftself_param(ptr swiftself %addr0) {8 ret ptr%addr09}10 11; Check that r13 is used to pass a swiftself argument.12; CHECK-LABEL: call_swiftself:13; CHECK: movq %rdi, %r1314; CHECK: callq {{_?}}swiftself_param15define ptr@call_swiftself(ptr %arg) {16 %res = call ptr@swiftself_param(ptr swiftself %arg)17 ret ptr%res18}19 20; r13 should be saved by the callee even if used for swiftself21; CHECK-LABEL: swiftself_clobber:22; CHECK: pushq %r1323; ...24; CHECK: popq %r1325define ptr@swiftself_clobber(ptr swiftself %addr0) {26 call void asm sideeffect "nop", "~{r13}"()27 ret ptr%addr028}29 30; Demonstrate that we do not need any movs when calling multiple functions31; with swiftself argument.32; CHECK-LABEL: swiftself_passthrough:33; OPT-NOT: mov{{.*}}r1334; OPT: callq {{_?}}swiftself_param35; OPT-NOT: mov{{.*}}r1336; OPT-NEXT: callq {{_?}}swiftself_param37define void @swiftself_passthrough(ptr swiftself %addr0) {38 call ptr@swiftself_param(ptr swiftself %addr0)39 call ptr@swiftself_param(ptr swiftself %addr0)40 ret void41}42 43; We can use a tail call if the callee swiftself is the same as the caller one.44; This should also work with fast-isel.45; CHECK-LABEL: swiftself_tail:46; CHECK: jmp {{_?}}swiftself_param47; CHECK-NOT: ret48define ptr @swiftself_tail(ptr swiftself %addr0) {49 call void asm sideeffect "", "~{r13}"()50 %res = tail call ptr @swiftself_param(ptr swiftself %addr0)51 ret ptr %res52}53 54; We can not use a tail call if the callee swiftself is not the same as the55; caller one.56; CHECK-LABEL: swiftself_notail:57; CHECK: movq %rdi, %r1358; CHECK: callq {{_?}}swiftself_param59; CHECK: retq60define ptr @swiftself_notail(ptr swiftself %addr0, ptr %addr1) nounwind {61 %res = tail call ptr @swiftself_param(ptr swiftself %addr1)62 ret ptr %res63}64