LTO: Add a testcase for linking modules with incompatible Debug Info

Versions.
rdar://problem/16926122

llvm-svn: 209183

2 files changed, 26 insertions, 0 deletions

diff --git a/llvm/test/Linker/debug-info-version-a.ll b/llvm/test/Linker/debug-info-version-a.ll
new file mode 100644
index 00000000000..c3d9c87a2e9
--- /dev/null
+++ b/llvm/test/Linker/debug-info-version-a.ll
@@ -0,0 +1,16 @@
+; RUN: llvm-link %s %p/debug-info-version-b.ll -S -o - | FileCheck %s
+
+; Test linking of incompatible debug info versions. The debug info
+; from the other file should be dropped.
+
+; CHECK-NOT: metadata !{metadata !"b.c", metadata !""}
+; CHECK: metadata !{metadata !"a.c", metadata !""}
+; CHECK-NOT: metadata !{metadata !"b.c", metadata !""}
+
+!llvm.module.flags = !{ !0 }
+!llvm.dbg.cu = !{!1}
+
+!0 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
+!1 = metadata !{i32 589841, metadata !2, i32 12, metadata !"clang", i1 true, metadata !"", i32 0, metadata !3, metadata !3, metadata !3, null, null, metadata !""} ; [ DW_TAG_compile_unit ]
+!2 = metadata !{metadata !"a.c", metadata !""}
+!3 = metadata !{}
diff --git a/llvm/test/Linker/debug-info-version-b.ll b/llvm/test/Linker/debug-info-version-b.ll
new file mode 100644
index 00000000000..2b4f1844d16
--- /dev/null
+++ b/llvm/test/Linker/debug-info-version-b.ll
@@ -0,0 +1,10 @@
+; RUN: true
+; Companion for debug-info-version-a.ll.
+
+!llvm.module.flags = !{ !0 }
+!llvm.dbg.cu = !{!1}
+
+!0 = metadata !{i32 2, metadata !"Debug Info Version", i32 42}
+!1 = metadata !{i32 589841, metadata !2, i32 12, metadata !"clang", metadata !"I AM UNEXPECTED!"} ; [ DW_TAG_compile_unit ]
+!2 = metadata !{metadata !"b.c", metadata !""}
+!3 = metadata !{}