Add a test showing when ld64 can hide linkonce_odr symbols.

llvm-svn: 257903

1 files changed, 30 insertions, 0 deletions

diff --git a/llvm/test/tools/lto/hide-linkonce-odr.ll b/llvm/test/tools/lto/hide-linkonce-odr.ll
new file mode 100644
index 00000000000..a1de96e8b33
--- /dev/null
+++ b/llvm/test/tools/lto/hide-linkonce-odr.ll
@@ -0,0 +1,30 @@
+; RUN: llvm-as %s -o %t.o
+; RUN: %ld64 -lto_library %llvmshlibdir/libLTO.dylib -dylib -arch x86_64 -macosx_version_min 10.10.0 -lSystem -o %t.dylib %t.o -save-temps  -undefined dynamic_lookup
+
+; RUN: llvm-dis %t.dylib.lto.opt.bc -o - | FileCheck --check-prefix=IR %s
+; check that @a is still a linkonce_odr definition
+; IR: define linkonce_odr void @a()
+
+; RUN: llvm-nm %t.dylib | FileCheck --check-prefix=NM %s
+; check that the linker can hide @a but not @b
+; NM: 0000000000000f10 t _a
+; NM: 0000000000000f20 T _b
+; NM: 0000000000000f00 T _c
+
+target triple = "x86_64-apple-macosx10.10.0"
+
+declare void @external()
+
+define linkonce_odr void @a() noinline {
+  call void @external()
+  ret void
+}
+
+define linkonce_odr void @b() {
+  ret void
+}
+
+define void()* @c() {
+  call void @a()
+  ret void()* @b
+}