1 files changed, 19 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/regress-tail-livereg.ll b/test/CodeGen/AArch64/regress-tail-livereg.ll
new file mode 100644
index 0000000000000..8d5485cae4c8c
--- /dev/null
+++ b/test/CodeGen/AArch64/regress-tail-livereg.ll
@@ -0,0 +1,19 @@
+; RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s
+@var = global void()* zeroinitializer
+
+declare void @bar()
+
+define void @foo() {
+; CHECK: foo:
+       %func = load void()** @var
+
+       ; Calling a function encourages @foo to use a callee-saved register,
+       ; which makes it a natural choice for the tail call itself. But we don't
+       ; want that: the final "br xN" has to use a temporary or argument
+       ; register.
+       call void @bar()
+
+       tail call void %func()
+; CHECK: br {{x([0-79]|1[0-8])}}
+       ret void
+}
+\ No newline at end of file