1 files changed, 65 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/swiftself.ll b/test/CodeGen/ARM/swiftself.ll
new file mode 100644
index 0000000000000..6826b123472f7
--- /dev/null
+++ b/test/CodeGen/ARM/swiftself.ll
@@ -0,0 +1,65 @@
+; RUN: llc -verify-machineinstrs -mtriple=armv7k-apple-ios8.0 -mcpu=cortex-a7 -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT --check-prefix=TAILCALL %s
+; RUN: llc -O0 -verify-machineinstrs -mtriple=armv7k-apple-ios8.0 -mcpu=cortex-a7 -o - %s | FileCheck %s
+
+; RUN: llc -verify-machineinstrs -mtriple=armv7-apple-ios -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s
+; RUN: llc -O0 -verify-machineinstrs -mtriple=armv7-apple-ios -o - %s | FileCheck %s
+
+; Parameter with swiftself should be allocated to r10.
+; CHECK-LABEL: swiftself_param:
+; CHECK: mov r0, r10
+define i8 *@swiftself_param(i8* swiftself %addr0) {
+    ret i8 *%addr0
+}
+
+; Check that r10 is used to pass a swiftself argument.
+; CHECK-LABEL: call_swiftself:
+; CHECK: mov r10, r0
+; CHECK: bl {{_?}}swiftself_param
+define i8 *@call_swiftself(i8* %arg) {
+  %res = call i8 *@swiftself_param(i8* swiftself %arg)
+  ret i8 *%res
+}
+
+; r10 should be saved by the callee even if used for swiftself
+; CHECK-LABEL: swiftself_clobber:
+; CHECK: push {r10}
+; ...
+; CHECK: pop {r10}
+define i8 *@swiftself_clobber(i8* swiftself %addr0) {
+  call void asm sideeffect "", "~{r10}"()
+  ret i8 *%addr0
+}
+
+; Demonstrate that we do not need any movs when calling multiple functions
+; with swiftself argument.
+; CHECK-LABEL: swiftself_passthrough:
+; OPT-NOT: mov{{.*}}r10
+; OPT: bl {{_?}}swiftself_param
+; OPT-NOT: mov{{.*}}r10
+; OPT-NEXT: bl {{_?}}swiftself_param
+define void @swiftself_passthrough(i8* swiftself %addr0) {
+  call i8 *@swiftself_param(i8* swiftself %addr0)
+  call i8 *@swiftself_param(i8* swiftself %addr0)
+  ret void
+}
+
+; We can use a tail call if the callee swiftself is the same as the caller one.
+; CHECK-LABEL: swiftself_tail:
+; TAILCALL: b {{_?}}swiftself_param
+; TAILCALL-NOT: pop
+define i8* @swiftself_tail(i8* swiftself %addr0) {
+  call void asm sideeffect "", "~{r10}"()
+  %res = tail call i8* @swiftself_param(i8* swiftself %addr0)
+  ret i8* %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: mov r10, r0
+; CHECK: bl {{_?}}swiftself_param
+; CHECK: pop
+define i8* @swiftself_notail(i8* swiftself %addr0, i8* %addr1) nounwind {
+  %res = tail call i8* @swiftself_param(i8* swiftself %addr1)
+  ret i8* %res
+}