DI: Disallow uniquable DICompileUnits
Since r241097, `DIBuilder` has only created distinct `DICompileUnit`s.
The backend is liable to start relying on that (if it hasn't already),
so make uniquable `DICompileUnit`s illegal and automatically upgrade old
bitcode. This is a nice cleanup, since we can remove an unnecessary
`DenseSet` (and the associated uniquing info) from `LLVMContextImpl`.
Almost all the testcases were updated with this script:
git grep -e '= !DICompileUnit' -l -- test |
grep -v test/Bitcode |
xargs sed -i '' -e 's,= !DICompileUnit,= distinct !DICompileUnit,'
I imagine something similar should work for out-of-tree testcases.
llvm-svn: 243885
diff --git a/llvm/test/DebugInfo/X86/byvalstruct.ll b/llvm/test/DebugInfo/X86/byvalstruct.ll
index 2d48ac3..bd20248 100644
--- a/llvm/test/DebugInfo/X86/byvalstruct.ll
+++ b/llvm/test/DebugInfo/X86/byvalstruct.ll
@@ -87,7 +87,7 @@
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!24, !25, !26, !27, !38}
-!0 = !DICompileUnit(language: DW_LANG_ObjC_plus_plus, producer: "clang version 3.4 ", isOptimized: false, runtimeVersion: 2, emissionKind: 0, file: !1, enums: !2, retainedTypes: !3, subprograms: !6, globals: !2, imports: !2)
+!0 = distinct !DICompileUnit(language: DW_LANG_ObjC_plus_plus, producer: "clang version 3.4 ", isOptimized: false, runtimeVersion: 2, emissionKind: 0, file: !1, enums: !2, retainedTypes: !3, subprograms: !6, globals: !2, imports: !2)
!1 = !DIFile(filename: "t.mm", directory: "")
!2 = !{}
!3 = !{!4}