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

Versions.
rdar://problem/16926122

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209183 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Linker/debug-info-version-a.ll b/test/Linker/debug-info-version-a.ll
new file mode 100644 (file)
index 0000000..c3d9c87
--- /dev/null
+++ b/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/test/Linker/debug-info-version-b.ll b/test/Linker/debug-info-version-b.ll
new file mode 100644 (file)
index 0000000..2b4f184
--- /dev/null
+++ b/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 !{}