| ; RUN: llc -verify-machineinstrs -mtriple=x86_64-unknown-windows-msvc -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s |
| ; RUN: llc -O0 -verify-machineinstrs -mtriple=x86_64-unknown-windows-msvc -o - %s | FileCheck %s |
| |
| ; Parameter with swiftself should be allocated to r13. |
| ; CHECK-LABEL: swiftself_param: |
| ; CHECK: movq %r13, %rax |
| define ptr@swiftself_param(ptr swiftself %addr0) { |
| ret ptr%addr0 |
| } |
| |
| ; Check that r13 is used to pass a swiftself argument. |
| ; CHECK-LABEL: call_swiftself: |
| ; CHECK: movq %rcx, %r13 |
| ; CHECK: callq swiftself_param |
| define ptr@call_swiftself(ptr %arg) { |
| %res = call ptr@swiftself_param(ptr swiftself %arg) |
| ret ptr%res |
| } |
| |
| ; r13 should be saved by the callee even if used for swiftself |
| ; CHECK-LABEL: swiftself_clobber: |
| ; CHECK: pushq %r13 |
| ; ... |
| ; CHECK: popq %r13 |
| define ptr@swiftself_clobber(ptr swiftself %addr0) { |
| call void asm sideeffect "nop", "~{r13}"() |
| ret ptr%addr0 |
| } |
| |
| ; Demonstrate that we do not need any movs when calling multiple functions |
| ; with swiftself argument. |
| ; CHECK-LABEL: swiftself_passthrough: |
| ; OPT-NOT: mov{{.*}}r13 |
| ; OPT: callq swiftself_param |
| ; OPT-NOT: mov{{.*}}r13 |
| ; OPT-NEXT: callq 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 |
| } |
| |
| ; We can use a tail call if the callee swiftself is the same as the caller one. |
| ; This should also work with fast-isel. |
| ; CHECK-LABEL: swiftself_tail: |
| ; CHECK: jmp swiftself_param |
| ; CHECK-NOT: ret |
| define ptr @swiftself_tail(ptr swiftself %addr0) { |
| call void asm sideeffect "", "~{r13}"() |
| %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: movq %rcx, %r13 |
| ; CHECK: callq swiftself_param |
| ; CHECK: retq |
| define ptr @swiftself_notail(ptr swiftself %addr0, ptr %addr1) nounwind { |
| %res = tail call ptr @swiftself_param(ptr swiftself %addr1) |
| ret ptr %res |
| } |