1 files changed, 46 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/cxx-tlscc.ll b/test/CodeGen/ARM/cxx-tlscc.ll
new file mode 100644
index 000000000000..7b776d4b8e88
--- /dev/null
+++ b/test/CodeGen/ARM/cxx-tlscc.ll
@@ -0,0 +1,46 @@
+; RUN: llc < %s -mtriple=armv7k-apple-watchos2.0 | FileCheck %s
+; RUN: llc < %s -mtriple=armv7k-apple-watchos2.0 -enable-shrink-wrap=true | FileCheck --check-prefix=CHECK %s
+; RUN: llc < %s -mtriple=armv7-apple-ios8.0 | FileCheck %s
+; RUN: llc < %s -mtriple=armv7-apple-ios8.0 -enable-shrink-wrap=true | FileCheck --check-prefix=CHECK %s
+
+%struct.S = type { i8 }
+
+@sg = internal thread_local global %struct.S zeroinitializer, align 1
+@__dso_handle = external global i8
+@__tls_guard = internal thread_local unnamed_addr global i1 false
+
+declare %struct.S* @_ZN1SC1Ev(%struct.S* returned)
+declare %struct.S* @_ZN1SD1Ev(%struct.S* returned)
+declare i32 @_tlv_atexit(void (i8*)*, i8*, i8*)
+
+define cxx_fast_tlscc nonnull %struct.S* @_ZTW2sg() nounwind {
+  %.b.i = load i1, i1* @__tls_guard, align 1
+  br i1 %.b.i, label %__tls_init.exit, label %init.i
+
+init.i:
+  store i1 true, i1* @__tls_guard, align 1
+  %call.i.i = tail call %struct.S* @_ZN1SC1Ev(%struct.S* nonnull @sg)
+  %1 = tail call i32 @_tlv_atexit(void (i8*)* nonnull bitcast (%struct.S* (%struct.S*)* @_ZN1SD1Ev to void (i8*)*), i8* nonnull getelementptr inbounds (%struct.S, %struct.S* @sg, i64 0, i32 0), i8* nonnull @__dso_handle)
+  br label %__tls_init.exit
+
+__tls_init.exit:
+  ret %struct.S* @sg
+}
+
+; CHECK-LABEL: _ZTW2sg
+; CHECK: push {lr}
+; CHECK-NOT: push {r1, r2, r3, r4, r7, lr}
+; CHECK-NOT: push {r9, r12}
+; CHECK-NOT: vpush {d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26, d27, d28, d29, d30, d31}
+; CHECK-NOT: vpush {d0, d1, d2, d3, d4, d5, d6, d7}
+; CHECK: blx
+; CHECK: bne [[BB_end:.?LBB0_[0-9]+]]
+; CHECK; blx
+; CHECK: tlv_atexit
+; CHECK: [[BB_end]]:
+; CHECK: blx
+; CHECK-NOT: vpop {d0, d1, d2, d3, d4, d5, d6, d7}
+; CHECK-NOT: vpop {d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26, d27, d28, d29, d30, d31}
+; CHECK-NOT: pop {r9, r12}
+; CHECK-NOT: pop {r1, r2, r3, r4, r7, pc}
+; CHECK: pop {lr}