1 files changed, 105 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/this-return.ll b/test/CodeGen/ARM/this-return.ll
new file mode 100644
index 0000000..f06e4a4
--- /dev/null
+++ b/test/CodeGen/ARM/this-return.ll
@@ -0,0 +1,105 @@
+; RUN: llc < %s -mtriple=armv6-linux-gnueabi -arm-tail-calls | FileCheck %s -check-prefix=CHECKELF
+; RUN: llc < %s -mtriple=thumbv7-apple-ios -arm-tail-calls | FileCheck %s -check-prefix=CHECKT2D
+
+%struct.A = type { i8 }
+%struct.B = type { i32 }
+%struct.C = type { %struct.B }
+%struct.D = type { %struct.B }
+%struct.E = type { %struct.B, %struct.B }
+
+declare %struct.A* @A_ctor_base(%struct.A* returned)
+declare %struct.B* @B_ctor_base(%struct.B* returned, i32)
+declare %struct.B* @B_ctor_complete(%struct.B* returned, i32)
+
+declare %struct.A* @A_ctor_base_nothisret(%struct.A*)
+declare %struct.B* @B_ctor_base_nothisret(%struct.B*, i32)
+declare %struct.B* @B_ctor_complete_nothisret(%struct.B*, i32)
+
+define %struct.C* @C_ctor_base(%struct.C* returned %this, i32 %x) {
+entry:
+; CHECKELF: C_ctor_base:
+; CHECKELF-NOT: mov {{r[0-9]+}}, r0
+; CHECKELF: bl A_ctor_base
+; CHECKELF-NOT: mov r0, {{r[0-9]+}}
+; CHECKELF: b B_ctor_base
+; CHECKT2D: C_ctor_base:
+; CHECKT2D-NOT: mov {{r[0-9]+}}, r0
+; CHECKT2D: blx _A_ctor_base
+; CHECKT2D-NOT: mov r0, {{r[0-9]+}}
+; CHECKT2D: b.w _B_ctor_base
+  %0 = bitcast %struct.C* %this to %struct.A*
+  %call = tail call %struct.A* @A_ctor_base(%struct.A* %0)
+  %1 = getelementptr inbounds %struct.C* %this, i32 0, i32 0
+  %call2 = tail call %struct.B* @B_ctor_base(%struct.B* %1, i32 %x)
+  ret %struct.C* %this
+}
+
+define %struct.C* @C_ctor_base_nothisret(%struct.C* %this, i32 %x) {
+entry:
+; CHECKELF: C_ctor_base_nothisret:
+; CHECKELF: mov [[SAVETHIS:r[0-9]+]], r0
+; CHECKELF: bl A_ctor_base_nothisret
+; CHECKELF: mov r0, [[SAVETHIS]]
+; CHECKELF-NOT: b B_ctor_base_nothisret
+; CHECKT2D: C_ctor_base_nothisret:
+; CHECKT2D: mov [[SAVETHIS:r[0-9]+]], r0
+; CHECKT2D: blx _A_ctor_base_nothisret
+; CHECKT2D: mov r0, [[SAVETHIS]]
+; CHECKT2D-NOT: b.w _B_ctor_base_nothisret
+  %0 = bitcast %struct.C* %this to %struct.A*
+  %call = tail call %struct.A* @A_ctor_base_nothisret(%struct.A* %0)
+  %1 = getelementptr inbounds %struct.C* %this, i32 0, i32 0
+  %call2 = tail call %struct.B* @B_ctor_base_nothisret(%struct.B* %1, i32 %x)
+  ret %struct.C* %this
+}
+
+define %struct.C* @C_ctor_complete(%struct.C* %this, i32 %x) {
+entry:
+; CHECKELF: C_ctor_complete:
+; CHECKELF: b C_ctor_base
+; CHECKT2D: C_ctor_complete:
+; CHECKT2D: b.w _C_ctor_base
+  %call = tail call %struct.C* @C_ctor_base(%struct.C* %this, i32 %x)
+  ret %struct.C* %this
+}
+
+define %struct.C* @C_ctor_complete_nothisret(%struct.C* %this, i32 %x) {
+entry:
+; CHECKELF: C_ctor_complete_nothisret:
+; CHECKELF-NOT: b C_ctor_base_nothisret
+; CHECKT2D: C_ctor_complete_nothisret:
+; CHECKT2D-NOT: b.w _C_ctor_base_nothisret
+  %call = tail call %struct.C* @C_ctor_base_nothisret(%struct.C* %this, i32 %x)
+  ret %struct.C* %this
+}
+
+define %struct.D* @D_ctor_base(%struct.D* %this, i32 %x) {
+entry:
+; CHECKELF: D_ctor_base:
+; CHECKELF-NOT: mov {{r[0-9]+}}, r0
+; CHECKELF: bl B_ctor_complete
+; CHECKELF-NOT: mov r0, {{r[0-9]+}}
+; CHECKELF: b B_ctor_complete
+; CHECKT2D: D_ctor_base:
+; CHECKT2D-NOT: mov {{r[0-9]+}}, r0
+; CHECKT2D: blx _B_ctor_complete
+; CHECKT2D-NOT: mov r0, {{r[0-9]+}}
+; CHECKT2D: b.w _B_ctor_complete
+  %b = getelementptr inbounds %struct.D* %this, i32 0, i32 0
+  %call = tail call %struct.B* @B_ctor_complete(%struct.B* %b, i32 %x)
+  %call2 = tail call %struct.B* @B_ctor_complete(%struct.B* %b, i32 %x)
+  ret %struct.D* %this
+}
+
+define %struct.E* @E_ctor_base(%struct.E* %this, i32 %x) {
+entry:
+; CHECKELF: E_ctor_base:
+; CHECKELF-NOT: b B_ctor_complete
+; CHECKT2D: E_ctor_base:
+; CHECKT2D-NOT: b.w _B_ctor_complete
+  %b = getelementptr inbounds %struct.E* %this, i32 0, i32 0
+  %call = tail call %struct.B* @B_ctor_complete(%struct.B* %b, i32 %x)
+  %b2 = getelementptr inbounds %struct.E* %this, i32 0, i32 1
+  %call2 = tail call %struct.B* @B_ctor_complete(%struct.B* %b2, i32 %x)
+  ret %struct.E* %this
+}