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/CodeGen/ARM/debug-info-blocks.ll b/llvm/test/CodeGen/ARM/debug-info-blocks.ll
index 08a2a61..5178951 100644
--- a/llvm/test/CodeGen/ARM/debug-info-blocks.ll
+++ b/llvm/test/CodeGen/ARM/debug-info-blocks.ll
@@ -95,7 +95,7 @@
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!162}
-!0 = !DICompileUnit(language: DW_LANG_ObjC, producer: "Apple clang version 2.1", isOptimized: false, runtimeVersion: 2, emissionKind: 1, file: !153, enums: !147, retainedTypes: !{}, subprograms: !148)
+!0 = distinct !DICompileUnit(language: DW_LANG_ObjC, producer: "Apple clang version 2.1", isOptimized: false, runtimeVersion: 2, emissionKind: 1, file: !153, enums: !147, retainedTypes: !{}, subprograms: !148)
!1 = !DICompositeType(tag: DW_TAG_enumeration_type, line: 248, size: 32, align: 32, file: !160, scope: !0, elements: !3)
!2 = !DIFile(filename: "header.h", directory: "/Volumes/Sandbox/llvm")
!3 = !{!4}