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1; RUN: llc -verify-machineinstrs -mtriple=armv7k-apple-ios8.0 -mcpu=cortex-a7 -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT --check-prefix=TAILCALL %s2; RUN: llc -O0 -verify-machineinstrs -mtriple=armv7k-apple-ios8.0 -mcpu=cortex-a7 -o - %s | FileCheck %s3 4; RUN: llc -verify-machineinstrs -mtriple=armv7-apple-ios -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s5; RUN: llc -O0 -verify-machineinstrs -mtriple=armv7-apple-ios -o - %s | FileCheck %s6 7; Parameter with swiftself should be allocated to r10.8; CHECK-LABEL: swiftself_param:9; CHECK: mov r0, r1010define ptr @swiftself_param(ptr swiftself %addr0) "frame-pointer"="all" {11 ret ptr %addr012}13 14; Check that r10 is used to pass a swiftself argument.15; CHECK-LABEL: call_swiftself:16; CHECK: mov r10, r017; CHECK: bl {{_?}}swiftself_param18define ptr @call_swiftself(ptr %arg) "frame-pointer"="all" {19 %res = call ptr @swiftself_param(ptr swiftself %arg)20 ret ptr %res21}22 23; r10 should be saved by the callee even if used for swiftself24; CHECK-LABEL: swiftself_clobber:25; CHECK: push {r10}26; ...27; CHECK: pop {r10}28define ptr @swiftself_clobber(ptr swiftself %addr0) "frame-pointer"="all" {29 call void asm sideeffect "", "~{r10}"()30 ret ptr %addr031}32 33; Demonstrate that we do not need any movs when calling multiple functions34; with swiftself argument.35; CHECK-LABEL: swiftself_passthrough:36; OPT-NOT: mov{{.*}}r1037; OPT: bl {{_?}}swiftself_param38; OPT-NOT: mov{{.*}}r1039; OPT-NEXT: bl {{_?}}swiftself_param40define void @swiftself_passthrough(ptr swiftself %addr0) "frame-pointer"="all" {41 call ptr @swiftself_param(ptr swiftself %addr0)42 call ptr @swiftself_param(ptr swiftself %addr0)43 ret void44}45 46; We can use a tail call if the callee swiftself is the same as the caller one.47; CHECK-LABEL: swiftself_tail:48; TAILCALL: b {{_?}}swiftself_param49; TAILCALL-NOT: pop50define ptr @swiftself_tail(ptr swiftself %addr0) "frame-pointer"="all" {51 call void asm sideeffect "", "~{r10}"()52 %res = tail call ptr @swiftself_param(ptr swiftself %addr0)53 ret ptr %res54}55 56; We can not use a tail call if the callee swiftself is not the same as the57; caller one.58; CHECK-LABEL: swiftself_notail:59; CHECK: mov r10, r060; CHECK: bl {{_?}}swiftself_param61; CHECK: pop62define ptr @swiftself_notail(ptr swiftself %addr0, ptr %addr1) nounwind "frame-pointer"="all" {63 %res = tail call ptr @swiftself_param(ptr swiftself %addr1)64 ret ptr %res65}66 67; We cannot pretend that 'r0' is alive across the thisreturn_attribute call as68; we normally would. We marked the first parameter with swiftself which means it69; will no longer be passed in r0.70declare swiftcc ptr @thisreturn_attribute(ptr returned swiftself)71; OPT-LABEL: swiftself_nothisreturn:72; OPT-DAG: mov [[CSREG:r[1-9].*]], r073; OPT-DAG: ldr r10, [r10]74; OPT: bl {{_?}}thisreturn_attribute75; OPT: str r0, [[[CSREG]]76define hidden swiftcc void @swiftself_nothisreturn(ptr noalias nocapture sret(ptr), ptr noalias nocapture readonly swiftself) {77entry:78 %2 = load ptr, ptr %1, align 879 %3 = tail call swiftcc ptr @thisreturn_attribute(ptr swiftself %2)80 store ptr %3, ptr %0, align 881 ret void82}83