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/X86/float_const.ll b/llvm/test/DebugInfo/X86/float_const.ll
index 7d5a355be76..6e99ffcc1f2 100644
--- a/llvm/test/DebugInfo/X86/float_const.ll
+++ b/llvm/test/DebugInfo/X86/float_const.ll
@@ -31,25 +31,25 @@ attributes #1 = { nounwind readnone }
 !llvm.module.flags = !{!15, !16, !17}
 !llvm.ident = !{!18}
 
-!0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.7.0 (trunk 227686)", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !6, globals: !2, imports: !2)
-!1 = !MDFile(filename: "foo.c", directory: "")
+!0 = !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.7.0 (trunk 227686)", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !6, globals: !2, imports: !2)
+!1 = !DIFile(filename: "foo.c", directory: "")
 !2 = !{}
 !3 = !{!4}
-!4 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !5)
-!5 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!4 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !5)
+!5 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !6 = !{!7}
-!7 = !MDSubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, isOptimized: true, scopeLine: 1, file: !8, scope: !9, type: !10, function: void ()* @foo, variables: !12)
-!8 = !MDFile(filename: "foo.c", directory: "")
-!9 = !MDFile(filename: "foo.c", directory: "")
-!10 = !MDSubroutineType(types: !11)
+!7 = !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, isOptimized: true, scopeLine: 1, file: !8, scope: !9, type: !10, function: void ()* @foo, variables: !12)
+!8 = !DIFile(filename: "foo.c", directory: "")
+!9 = !DIFile(filename: "foo.c", directory: "")
+!10 = !DISubroutineType(types: !11)
 !11 = !{null}
 !12 = !{!13}
-!13 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "a", line: 2, scope: !7, file: !9, type: !14)
-!14 = !MDBasicType(tag: DW_TAG_base_type, name: "float", size: 32, align: 32, encoding: DW_ATE_float)
+!13 = !DILocalVariable(tag: DW_TAG_auto_variable, name: "a", line: 2, scope: !7, file: !9, type: !14)
+!14 = !DIBasicType(tag: DW_TAG_base_type, name: "float", size: 32, align: 32, encoding: DW_ATE_float)
 !15 = !{i32 2, !"Dwarf Version", i32 2}
 !16 = !{i32 2, !"Debug Info Version", i32 3}
 !17 = !{i32 1, !"PIC Level", i32 2}
 !18 = !{!"clang version 3.7.0 (trunk 227686)"}
-!19 = !MDExpression()
-!20 = !MDLocation(line: 2, column: 9, scope: !7)
-!21 = !MDLocation(line: 4, column: 1, scope: !7)
+!19 = !DIExpression()
+!20 = !DILocation(line: 2, column: 9, scope: !7)
+!21 = !DILocation(line: 4, column: 1, scope: !7)