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, 13 insertions, 13 deletions

diff --git a/llvm/test/DebugInfo/incorrect-variable-debugloc1.ll b/llvm/test/DebugInfo/incorrect-variable-debugloc1.ll
index ffedeb2b36e..3ece94ac888 100644
--- a/llvm/test/DebugInfo/incorrect-variable-debugloc1.ll
+++ b/llvm/test/DebugInfo/incorrect-variable-debugloc1.ll
@@ -53,25 +53,25 @@ attributes #2 = { nounwind readnone }
 !llvm.module.flags = !{!12, !13}
 !llvm.ident = !{!14}
 
-!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (trunk 223522)", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
-!1 = !MDFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
+!0 = !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (trunk 223522)", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
+!1 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
 !2 = !{}
 !3 = !{!4}
-!4 = !MDSubprogram(name: "main", line: 3, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 4, file: !1, scope: !5, type: !6, function: i32 ()* @main, variables: !9)
-!5 = !MDFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
-!6 = !MDSubroutineType(types: !7)
+!4 = !DISubprogram(name: "main", line: 3, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 4, file: !1, scope: !5, type: !6, function: i32 ()* @main, variables: !9)
+!5 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
+!6 = !DISubroutineType(types: !7)
 !7 = !{!8}
-!8 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !9 = !{!10}
-!10 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "c", line: 5, scope: !4, file: !5, type: !11)
-!11 = !MDDerivedType(tag: DW_TAG_volatile_type, baseType: !8)
+!10 = !DILocalVariable(tag: DW_TAG_auto_variable, name: "c", line: 5, scope: !4, file: !5, type: !11)
+!11 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !8)
 !12 = !{i32 2, !"Dwarf Version", i32 2}
 !13 = !{i32 2, !"Debug Info Version", i32 3}
 !14 = !{!"clang version 3.6.0 (trunk 223522)"}
 !15 = !{i32 13}
-!16 = !MDExpression()
-!17 = !MDLocation(line: 5, column: 16, scope: !4)
-!18 = !MDLocation(line: 5, column: 3, scope: !4)
-!19 = !MDLocation(line: 6, column: 7, scope: !4)
-!20 = !MDLocation(line: 7, column: 3, scope: !4)
+!16 = !DIExpression()
+!17 = !DILocation(line: 5, column: 16, scope: !4)
+!18 = !DILocation(line: 5, column: 3, scope: !4)
+!19 = !DILocation(line: 6, column: 7, scope: !4)
+!20 = !DILocation(line: 7, column: 3, scope: !4)