IR: Give 'DI' prefix to debug info metadata

Finish off PR23080 by renaming the debug info IR constructs from `MD*`
to `DI*`.  The last of the `DIDescriptor` classes were deleted in
r235356, and the last of the related typedefs removed in r235413, so
this has all baked for about a week.

Note: If you have out-of-tree code (like a frontend), I recommend that
you get everything compiling and tests passing with the *previous*
commit before updating to this one.  It'll be easier to keep track of
what code is using the `DIDescriptor` hierarchy and what you've already
updated, and I think you're extremely unlikely to insert bugs.  YMMV of
course.

Back to *this* commit: I did this using the rename-md-di-nodes.sh
upgrade script I've attached to PR23080 (both code and testcases) and
filtered through clang-format-diff.py.  I edited the tests for
test/Assembler/invalid-generic-debug-node-*.ll by hand since the columns
were off-by-three.  It should work on your out-of-tree testcases (and
code, if you've followed the advice in the previous paragraph).

Some of the tests are in badly named files now (e.g.,
test/Assembler/invalid-mdcompositetype-missing-tag.ll should be
'dicompositetype'); I'll come back and move the files in a follow-up
commit.

llvm-svn: 236120

1 files changed, 5 insertions, 5 deletions

diff --git a/llvm/test/DebugInfo/PowerPC/tls.ll b/llvm/test/DebugInfo/PowerPC/tls.ll
index 77016f42ee5..8ba350ac60d 100644
--- a/llvm/test/DebugInfo/PowerPC/tls.ll
+++ b/llvm/test/DebugInfo/PowerPC/tls.ll
@@ -17,13 +17,13 @@
 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!7, !8}
 
-!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4 ", isOptimized: false, emissionKind: 0, file: !1, enums: !2, retainedTypes: !2, subprograms: !2, globals: !3, imports: !2)
-!1 = !MDFile(filename: "tls.cpp", directory: "/tmp")
+!0 = !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4 ", isOptimized: false, emissionKind: 0, file: !1, enums: !2, retainedTypes: !2, subprograms: !2, globals: !3, imports: !2)
+!1 = !DIFile(filename: "tls.cpp", directory: "/tmp")
 !2 = !{}
 !3 = !{!4}
-!4 = !MDGlobalVariable(name: "tls", line: 1, isLocal: false, isDefinition: true, scope: null, file: !5, type: !6, variable: i32* @tls)
-!5 = !MDFile(filename: "tls.cpp", directory: "/tmp")
-!6 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!4 = !DIGlobalVariable(name: "tls", line: 1, isLocal: false, isDefinition: true, scope: null, file: !5, type: !6, variable: i32* @tls)
+!5 = !DIFile(filename: "tls.cpp", directory: "/tmp")
+!6 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !7 = !{i32 2, !"Dwarf Version", i32 3}
 
 !8 = !{i32 1, !"Debug Info Version", i32 3}