From 805b8166cf77947bc0ad3a620e8ff35bc88b2cc2 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Mon, 1 Dec 2014 03:20:57 +0000
Subject: [PATCH] Add a test showing what the linker IdentifiedStructTypes is
 for.

Without this it could just be deleted and all tests would pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222985 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Linker/Inputs/type-unique-dst-types2.ll |  3 +++
 test/Linker/Inputs/type-unique-dst-types3.ll |  2 ++
 test/Linker/type-unique-dst-types.ll         | 16 ++++++++++++++++
 3 files changed, 21 insertions(+)
 create mode 100644 test/Linker/Inputs/type-unique-dst-types2.ll
 create mode 100644 test/Linker/Inputs/type-unique-dst-types3.ll
 create mode 100644 test/Linker/type-unique-dst-types.ll

diff --git a/test/Linker/Inputs/type-unique-dst-types2.ll b/test/Linker/Inputs/type-unique-dst-types2.ll
new file mode 100644
index 00000000000..b565c6d7364
--- /dev/null
+++ b/test/Linker/Inputs/type-unique-dst-types2.ll
@@ -0,0 +1,3 @@
+%A.11 = type { %B }
+%B = type { i8 }
+@g1 = external global %A.11
diff --git a/test/Linker/Inputs/type-unique-dst-types3.ll b/test/Linker/Inputs/type-unique-dst-types3.ll
new file mode 100644
index 00000000000..c5794ad839a
--- /dev/null
+++ b/test/Linker/Inputs/type-unique-dst-types3.ll
@@ -0,0 +1,2 @@
+%A.11 = type opaque
+@g2 = external global %A.11
diff --git a/test/Linker/type-unique-dst-types.ll b/test/Linker/type-unique-dst-types.ll
new file mode 100644
index 00000000000..6033cb4d501
--- /dev/null
+++ b/test/Linker/type-unique-dst-types.ll
@@ -0,0 +1,16 @@
+; RUN: llvm-link %p/type-unique-dst-types.ll \
+; RUN:           %p/Inputs/type-unique-dst-types2.ll \
+; RUN:           %p/Inputs/type-unique-dst-types3.ll -S -o - | FileCheck %s
+
+; This tests the importance of keeping track of which types are part of the
+; destination module.
+; When the second input is merged in, the context gets an unused A.11. When
+; the third module is then merged, we should pretend it doesn't exist.
+
+; CHECK: %A = type { %B }
+; CHECK-NEXT: %B = type { i8 }
+; CHECK-NEXT: %A.11.1 = type opaque
+
+%A = type { %B }
+%B = type { i8 }
+@g3 = external global %A
-- 
2.34.1