1 files changed, 37 insertions, 0 deletions
diff --git a/test/Transforms/GlobalOpt/preserve-comdats.ll b/test/Transforms/GlobalOpt/preserve-comdats.ll
new file mode 100644
index 0000000..08188b9
--- /dev/null
+++ b/test/Transforms/GlobalOpt/preserve-comdats.ll
@@ -0,0 +1,37 @@
+; RUN: opt -globalopt -S < %s | FileCheck %s
+
+$comdat_global = comdat any
+
+@comdat_global = weak_odr global i8 0, comdat $comdat_global
+@simple_global = internal global i8 0
+; CHECK: @comdat_global = weak_odr global i8 0, comdat $comdat_global
+; CHECK: @simple_global = internal global i8 42
+
+@llvm.global_ctors = appending global [2 x { i32, void ()*, i8* }] [
+    { i32, void ()*, i8* } { i32 65535, void ()* @init_comdat_global, i8* @comdat_global },
+    { i32, void ()*, i8* } { i32 65535, void ()* @init_simple_global, i8* null }
+]
+; CHECK: @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }]
+; CHECK: [{ i32, void ()*, i8* } { i32 65535, void ()* @init_comdat_global, i8* @comdat_global }]
+
+define void @init_comdat_global() {
+  store i8 42, i8* @comdat_global
+  ret void
+}
+; CHECK: define void @init_comdat_global()
+
+define internal void @init_simple_global() comdat $comdat_global {
+  store i8 42, i8* @simple_global
+  ret void
+}
+; CHECK-NOT: @init_simple_global()
+
+define i8* @use_simple() {
+  ret i8* @simple_global
+}
+; CHECK: define i8* @use_simple()
+
+define i8* @use_comdat() {
+  ret i8* @comdat_global
+}
+; CHECK: define i8* @use_comdat()