ARM: use an external relocation for calls from MachO ARM mode.

The internal (__text-relative) relocation risks the offset not being encodable
if the destination is Thumb.

llvm-svn: 311187

1 files changed, 16 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/ARM/arm-macho-tail.ll b/llvm/test/CodeGen/ARM/arm-macho-tail.ll
new file mode 100644
index 00000000000..8c9b988ea78
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/arm-macho-tail.ll
@@ -0,0 +1,16 @@
+; RUN: llc -mtriple=thumbv7-apple-watchos %s -filetype=obj -o %t
+; RUN: llvm-objdump -r %t | FileCheck %s
+
+  ; Relocation needs to explicitly mention _bar rather than be __text relative
+  ; because the __text relative offset is not encodable in an ARM instruction.
+; CHECK: ARM_RELOC_BR24 _bar
+define void @foo() "target-features"="-thumb-mode" {
+  tail call void @bar()
+  ret void
+}
+
+define void @one_inst() { ret void }
+
+define void @bar() {
+  ret void
+}