Debug Info Testing: update context from empty string to null.

Context should be either null or MDNode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190267 91177308-0d34-0410-b5e6-96231b3b80d8

44 files changed, 122 insertions, 122 deletions

diff --git a/test/CodeGen/ARM/debug-info-qreg.ll b/test/CodeGen/ARM/debug-info-qreg.ll
index 5e09083..1ad71ab 100644
--- a/test/CodeGen/ARM/debug-info-qreg.ll
+++ b/test/CodeGen/ARM/debug-info-qreg.ll
@@ -43,7 +43,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !3 = metadata !{i32 786453, metadata !54, metadata !1, metadata !"", i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !4, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !4 = metadata !{metadata !5}
 !5 = metadata !{i32 786454, metadata !54, metadata !2, metadata !"v4f32", i32 14, i64 0, i64 0, i64 0, i32 0, metadata !6} ; [ DW_TAG_typedef ]
-!6 = metadata !{i32 786433, metadata !2, metadata !"", metadata !2, i32 0, i64 128, i64 128, i32 0, i32 0, metadata !7, metadata !8, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 128, align 128, offset 0] [from float]
+!6 = metadata !{i32 786433, metadata !2, null, metadata !2, i32 0, i64 128, i64 128, i32 0, i32 0, metadata !7, metadata !8, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 128, align 128, offset 0] [from float]
 !7 = metadata !{i32 786468, null, metadata !2, metadata !"float", i32 0, i64 32, i64 32, i64 0, i32 0, i32 4} ; [ DW_TAG_base_type ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 786465, i64 0, i64 4}         ; [ DW_TAG_subrange_type ]
diff --git a/test/DebugInfo/2009-11-05-DeadGlobalVariable.ll b/test/DebugInfo/2009-11-05-DeadGlobalVariable.ll
index 3df667c..2acee586 100644
--- a/test/DebugInfo/2009-11-05-DeadGlobalVariable.ll
+++ b/test/DebugInfo/2009-11-05-DeadGlobalVariable.ll
@@ -14,7 +14,7 @@ entry:
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 720942, metadata !17, metadata !6, metadata !"foo", metadata !"foo", metadata !"", i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 true, i32 ()* @foo, null, null, metadata !10, i32 0} ; [ DW_TAG_subprogram ] [line 1] [def] [scope 0] [foo]
 !6 = metadata !{i32 720937, metadata !17} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 720932, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !10 = metadata !{metadata !11}
diff --git a/test/DebugInfo/2009-11-10-CurrentFn.ll b/test/DebugInfo/2009-11-10-CurrentFn.ll
index b24e2d3..8e68d7d 100644
--- a/test/DebugInfo/2009-11-10-CurrentFn.ll
+++ b/test/DebugInfo/2009-11-10-CurrentFn.ll
@@ -17,7 +17,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 720942, metadata !17, metadata !6, metadata !"bar", metadata !"bar", metadata !"", i32 3, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void (i32)* @bar, null, null, metadata !9, metadata !""} ; [ DW_TAG_subprogram ] [line 3] [def] [scope 0] [bar]
 !6 = metadata !{i32 720937, metadata !17} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null}
 !9 = metadata !{metadata !11}
 !11 = metadata !{i32 721153, metadata !17, metadata !5, metadata !"i", i32 16777219, metadata !12, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
diff --git a/test/DebugInfo/X86/2011-09-26-GlobalVarContext.ll b/test/DebugInfo/X86/2011-09-26-GlobalVarContext.ll
index 367e47c..6cd56a5 100644
--- a/test/DebugInfo/X86/2011-09-26-GlobalVarContext.ll
+++ b/test/DebugInfo/X86/2011-09-26-GlobalVarContext.ll
@@ -23,7 +23,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 720942, metadata !6, metadata !6, metadata !"f", metadata !"f", metadata !"", i32 3, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 false, i32 ()* @f, null, null, metadata !10, i32 0} ; [ DW_TAG_subprogram ] [line 3] [def] [scope 0] [f]
 !6 = metadata !{i32 720937, metadata !20} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 720932, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !10 = metadata !{metadata !11}
diff --git a/test/DebugInfo/X86/2011-12-16-BadStructRef.ll b/test/DebugInfo/X86/2011-12-16-BadStructRef.ll
index 842861e..3fb8dc5 100644
--- a/test/DebugInfo/X86/2011-12-16-BadStructRef.ll
+++ b/test/DebugInfo/X86/2011-12-16-BadStructRef.ll
@@ -100,22 +100,22 @@ entry:
 !11 = metadata !{i32 720909, metadata !82, metadata !9, metadata !"h", i32 5, i64 32, i64 32, i64 0, i32 0, metadata !12} ; [ DW_TAG_member ]
 !12 = metadata !{i32 720932, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !13 = metadata !{i32 720942, metadata !82, metadata !9, metadata !"baz", metadata !"baz", metadata !"", i32 6, metadata !14, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !17, i32 0} ; [ DW_TAG_subprogram ]
-!14 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !15, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!14 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !15, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !15 = metadata !{null, metadata !16, metadata !12}
-!16 = metadata !{i32 720911, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !9} ; [ DW_TAG_pointer_type ]
+!16 = metadata !{i32 720911, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !9} ; [ DW_TAG_pointer_type ]
 !17 = metadata !{metadata !18}
 !18 = metadata !{i32 720932}                      ; [ DW_TAG_base_type ]
 !19 = metadata !{i32 720909, metadata !82, metadata !5, metadata !"b_ref", i32 12, i64 64, i64 64, i64 64, i32 0, metadata !20} ; [ DW_TAG_member ]
 !20 = metadata !{i32 720912, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !9} ; [ DW_TAG_reference_type ]
 !21 = metadata !{i32 720942, metadata !82, metadata !5, metadata !"bar", metadata !"bar", metadata !"", i32 13, metadata !22, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !25, i32 0} ; [ DW_TAG_subprogram ]
-!22 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !23, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!22 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !23, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !23 = metadata !{null, metadata !24, metadata !12}
-!24 = metadata !{i32 720911, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !5} ; [ DW_TAG_pointer_type ]
+!24 = metadata !{i32 720911, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !5} ; [ DW_TAG_pointer_type ]
 !25 = metadata !{metadata !26}
 !26 = metadata !{i32 720932}                      ; [ DW_TAG_base_type ]
 !27 = metadata !{metadata !29, metadata !37, metadata !40, metadata !43, metadata !46}
 !29 = metadata !{i32 720942, metadata !82, metadata !6, metadata !"main", metadata !"main", metadata !"", i32 17, metadata !30, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32, i8**)* @main, null, null, metadata !47, i32 0} ; [ DW_TAG_subprogram ] [line 17] [def] [scope 0] [main]
-!30 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !31, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!30 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !31, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !31 = metadata !{metadata !12, metadata !12, metadata !32}
 !32 = metadata !{i32 720911, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !33} ; [ DW_TAG_pointer_type ]
 !33 = metadata !{i32 720911, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !34} ; [ DW_TAG_pointer_type ]
diff --git a/test/DebugInfo/X86/DW_AT_byte_size.ll b/test/DebugInfo/X86/DW_AT_byte_size.ll
index 36fa044..6bc9075 100644
--- a/test/DebugInfo/X86/DW_AT_byte_size.ll
+++ b/test/DebugInfo/X86/DW_AT_byte_size.ll
@@ -29,7 +29,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !20, metadata !6, metadata !"foo", metadata !"foo", metadata !"_Z3fooP1A", i32 3, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (%struct.A*)* @_Z3fooP1A, null, null, metadata !14, i32 3} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !20} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9, metadata !10}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !10 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
diff --git a/test/DebugInfo/X86/DW_AT_object_pointer.ll b/test/DebugInfo/X86/DW_AT_object_pointer.ll
index 697655e..2bfc4c5 100644
--- a/test/DebugInfo/X86/DW_AT_object_pointer.ll
+++ b/test/DebugInfo/X86/DW_AT_object_pointer.ll
@@ -54,13 +54,13 @@ entry:
 !3 = metadata !{metadata !5, metadata !10, metadata !20}
 !5 = metadata !{i32 786478, metadata !6, metadata !6, metadata !"foo", metadata !"foo", metadata !"_Z3fooi", i32 7, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z3fooi, null, null, metadata !1, i32 7} ; [ DW_TAG_subprogram ] [line 7] [def] [foo]
 !6 = metadata !{i32 786473, metadata !37} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
 !10 = metadata !{i32 786478, metadata !6, null, metadata !"A", metadata !"A", metadata !"_ZN1AC1Ev", i32 3, metadata !11, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.A*)* @_ZN1AC1Ev, null, metadata !17, metadata !1, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [A]
-!11 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !12, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!11 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !12, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !12 = metadata !{null, metadata !13}
-!13 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !14} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
+!13 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !14} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
 !14 = metadata !{i32 786434, metadata !37, null, metadata !"A", i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !15, i32 0, null, null, null} ; [ DW_TAG_class_type ] [A] [line 1, size 32, align 32, offset 0] [def] [from ]
 !15 = metadata !{metadata !16, metadata !17}
 !16 = metadata !{i32 786445, metadata !37, metadata !14, metadata !"m_a", i32 4, i64 32, i64 32, i64 0, i32 0, metadata !9} ; [ DW_TAG_member ] [m_a] [line 4, size 32, align 32, offset 0] [from int]
diff --git a/test/DebugInfo/X86/DW_AT_specification.ll b/test/DebugInfo/X86/DW_AT_specification.ll
index 4d928e3..f90d0fb 100644
--- a/test/DebugInfo/X86/DW_AT_specification.ll
+++ b/test/DebugInfo/X86/DW_AT_specification.ll
@@ -21,9 +21,9 @@ entry:
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 720942, metadata !6, null, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEv", i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_ZN3foo3barEv, null, metadata !11, metadata !16, i32 4} ; [ DW_TAG_subprogram ] [line 4] [def] [bar]
 !6 = metadata !{i32 720937, metadata !27} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null, metadata !9}
-!9 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !10} ; [ DW_TAG_pointer_type ]
+!9 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !10} ; [ DW_TAG_pointer_type ]
 !10 = metadata !{i32 786451, metadata !27, null, metadata !"foo", i32 1, i64 0, i64 0, i32 0, i32 4, null, null, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [foo] [line 1, size 0, align 0, offset 0] [decl] [from ]
 !11 = metadata !{i32 720942, metadata !6, metadata !12, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEv", i32 2, metadata !7, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !14, i32 2} ; [ DW_TAG_subprogram ]
 !12 = metadata !{i32 720898, metadata !27, null, metadata !"foo", i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !13, i32 0, null, null} ; [ DW_TAG_class_type ]
diff --git a/test/DebugInfo/X86/DW_TAG_friend.ll b/test/DebugInfo/X86/DW_TAG_friend.ll
index f156069..a059fd1 100644
--- a/test/DebugInfo/X86/DW_TAG_friend.ll
+++ b/test/DebugInfo/X86/DW_TAG_friend.ll
@@ -27,9 +27,9 @@
 !9 = metadata !{i32 786445, metadata !28, metadata !7, metadata !"a", i32 2, i64 32, i64 32, i64 0, i32 1, metadata !10} ; [ DW_TAG_member ]
 !10 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !11 = metadata !{i32 786478, metadata !6, metadata !7, metadata !"A", metadata !"A", metadata !"", i32 1, metadata !12, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !15, i32 1} ; [ DW_TAG_subprogram ]
-!12 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!12 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !13 = metadata !{null, metadata !14}
-!14 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !7} ; [ DW_TAG_pointer_type ]
+!14 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !7} ; [ DW_TAG_pointer_type ]
 !15 = metadata !{metadata !16}
 !16 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !17 = metadata !{i32 786484, i32 0, null, metadata !"b", metadata !"b", metadata !"", metadata !6, i32 11, metadata !18, i32 0, i32 1, %class.B* @b, null} ; [ DW_TAG_variable ]
@@ -37,9 +37,9 @@
 !19 = metadata !{metadata !20, metadata !21, metadata !27}
 !20 = metadata !{i32 786445, metadata !28, metadata !18, metadata !"b", i32 7, i64 32, i64 32, i64 0, i32 1, metadata !10} ; [ DW_TAG_member ]
 !21 = metadata !{i32 786478, metadata !6, metadata !18, metadata !"B", metadata !"B", metadata !"", i32 5, metadata !22, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !25, i32 5} ; [ DW_TAG_subprogram ]
-!22 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !23, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!22 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !23, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !23 = metadata !{null, metadata !24}
-!24 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !18} ; [ DW_TAG_pointer_type ]
+!24 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !18} ; [ DW_TAG_pointer_type ]
 !25 = metadata !{metadata !26}
 !26 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !27 = metadata !{i32 786474, metadata !18, null, metadata !6, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !7} ; [ DW_TAG_friend ]
diff --git a/test/DebugInfo/X86/aligned_stack_var.ll b/test/DebugInfo/X86/aligned_stack_var.ll
index 74f8b9c..464c68b 100644
--- a/test/DebugInfo/X86/aligned_stack_var.ll
+++ b/test/DebugInfo/X86/aligned_stack_var.ll
@@ -31,7 +31,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !14, metadata !6, metadata !"run", metadata !"run", metadata !"_Z3runv", i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_Z3runv, null, null, metadata !1, i32 1} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !14} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null}
 !9 = metadata !{i32 786688, metadata !10, metadata !"x", metadata !6, i32 2, metadata !11, i32 0, i32 0} ; [ DW_TAG_auto_variable ]
 !10 = metadata !{i32 786443, metadata !14, metadata !5, i32 1, i32 12, i32 0} ; [ DW_TAG_lexical_block ]
diff --git a/test/DebugInfo/X86/block-capture.ll b/test/DebugInfo/X86/block-capture.ll
index 230e77a..a4acb10 100644
--- a/test/DebugInfo/X86/block-capture.ll
+++ b/test/DebugInfo/X86/block-capture.ll
@@ -67,7 +67,7 @@ declare i32 @__objc_personality_v0(...)
 !3 = metadata !{metadata !5, metadata !28, metadata !31, metadata !34}
 !5 = metadata !{i32 786478, metadata !6, metadata !6, metadata !"foo", metadata !"foo", metadata !"", i32 5, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, null, null, null, metadata !26, i32 5} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !63} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null, metadata !9}
 !9 = metadata !{i32 786454, metadata !63, null, metadata !"dispatch_block_t", i32 1, i64 0, i64 0, i64 0, i32 0, metadata !10} ; [ DW_TAG_typedef ]
 !10 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 0, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
@@ -89,10 +89,10 @@ declare i32 @__objc_personality_v0(...)
 !26 = metadata !{metadata !27}
 !27 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !28 = metadata !{i32 786478, metadata !6, metadata !6, metadata !"__foo_block_invoke_0", metadata !"__foo_block_invoke_0", metadata !"", i32 7, metadata !29, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (i8*)* @__foo_block_invoke_0, null, null, metadata !26, i32 7} ; [ DW_TAG_subprogram ]
-!29 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !30, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!29 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !30, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !30 = metadata !{null, metadata !14}
 !31 = metadata !{i32 786478, metadata !6, metadata !6, metadata !"__copy_helper_block_", metadata !"__copy_helper_block_", metadata !"", i32 10, metadata !32, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 false, null, null, null, metadata !26, i32 10} ; [ DW_TAG_subprogram ]
-!32 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !33, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!32 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !33, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !33 = metadata !{null, metadata !14, metadata !14}
 !34 = metadata !{i32 786478, metadata !6, metadata !6, metadata !"__destroy_helper_block_", metadata !"__destroy_helper_block_", metadata !"", i32 10, metadata !29, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 false, null, null, null, metadata !26, i32 10} ; [ DW_TAG_subprogram ]
 !35 = metadata !{i32 1, metadata !"Objective-C Version", i32 2}
diff --git a/test/DebugInfo/X86/concrete_out_of_line.ll b/test/DebugInfo/X86/concrete_out_of_line.ll
index ca932ad..a7f785d 100644
--- a/test/DebugInfo/X86/concrete_out_of_line.ll
+++ b/test/DebugInfo/X86/concrete_out_of_line.ll
@@ -39,16 +39,16 @@ declare void @_Z8moz_freePv(i8*)
 !3 = metadata !{metadata !5, metadata !23, metadata !27, metadata !31}
 !5 = metadata !{i32 720942, metadata !6, null, metadata !"Release", metadata !"Release", metadata !"_ZN17nsAutoRefCnt7ReleaseEv", i32 14, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32* null, null, metadata !12, metadata !20, i32 14} ; [ DW_TAG_subprogram ] [line 14] [def] [Release]
 !6 = metadata !{i32 720937, metadata !59} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9, metadata !10}
 !9 = metadata !{i32 720932, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
-!10 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !11} ; [ DW_TAG_pointer_type ]
+!10 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !11} ; [ DW_TAG_pointer_type ]
 !11 = metadata !{i32 786451, metadata !59, null, metadata !"nsAutoRefCnt", i32 10, i64 0, i64 0, i32 0, i32 4, null, null, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [nsAutoRefCnt] [line 10, size 0, align 0, offset 0] [decl] [from ]
 !12 = metadata !{i32 720942, metadata !6, metadata !13, metadata !"Release", metadata !"Release", metadata !"_ZN17nsAutoRefCnt7ReleaseEv", i32 11, metadata !7, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, metadata !18, i32 11} ; [ DW_TAG_subprogram ]
 !13 = metadata !{i32 720898, metadata !59, null, metadata !"nsAutoRefCnt", i32 10, i64 8, i64 8, i32 0, i32 0, null, metadata !14, null, null, null} ; [ DW_TAG_class_type ]
 !14 = metadata !{metadata !12, metadata !15}
 !15 = metadata !{i32 720942, metadata !6, metadata !13, metadata !"~nsAutoRefCnt", metadata !"~nsAutoRefCnt", metadata !"", i32 12, metadata !16, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, metadata !18, i32 12} ; [ DW_TAG_subprogram ]
-!16 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !17, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!16 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !17, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !17 = metadata !{null, metadata !10}
 !18 = metadata !{i32 720932}                      ; [ DW_TAG_base_type ]
 !20 = metadata !{metadata !22}
@@ -60,16 +60,16 @@ declare void @_Z8moz_freePv(i8*)
 !28 = metadata !{metadata !30}
 !30 = metadata !{i32 786689, metadata !27, metadata !"this", metadata !6, i32 16777234, metadata !10, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
 !31 = metadata !{i32 720942, metadata !6, null, metadata !"operator=", metadata !"operator=", metadata !"_ZN12nsAutoRefCntaSEi", i32 4, metadata !32, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, null, null, metadata !36, metadata !43, i32 4} ; [ DW_TAG_subprogram ] [line 4] [def] [operator=]
-!32 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !33, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!32 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !33, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !33 = metadata !{metadata !9, metadata !34, metadata !9}
-!34 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !35} ; [ DW_TAG_pointer_type ]
+!34 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !35} ; [ DW_TAG_pointer_type ]
 !35 = metadata !{i32 786451, metadata !59, null, metadata !"nsAutoRefCnt", i32 2, i64 0, i64 0, i32 0, i32 4, null, null, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [nsAutoRefCnt] [line 2, size 0, align 0, offset 0] [decl] [from ]
 !36 = metadata !{i32 720942, metadata !6, metadata !37, metadata !"operator=", metadata !"operator=", metadata !"_ZN12nsAutoRefCntaSEi", i32 4, metadata !32, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, metadata !18, i32 4} ; [ DW_TAG_subprogram ]
 !37 = metadata !{i32 720898, metadata !59, null, metadata !"nsAutoRefCnt", i32 2, i64 32, i64 32, i32 0, i32 0, null, metadata !38, i32 0, null, null, null} ; [ DW_TAG_class_type ] [nsAutoRefCnt] [line 2, size 32, align 32, offset 0] [def] [from ]
 !38 = metadata !{metadata !39, metadata !40, metadata !36}
 !39 = metadata !{i32 786445, metadata !59, metadata !37, metadata !"mValue", i32 7, i64 32, i64 32, i64 0, i32 0, metadata !9} ; [ DW_TAG_member ]
 !40 = metadata !{i32 720942, metadata !6, metadata !37, metadata !"nsAutoRefCnt", metadata !"nsAutoRefCnt", metadata !"", i32 3, metadata !41, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, metadata !18, i32 3} ; [ DW_TAG_subprogram ]
-!41 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !42, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!41 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !42, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !42 = metadata !{null, metadata !34}
 !43 = metadata !{metadata !45, metadata !46}
 !45 = metadata !{i32 786689, metadata !31, metadata !"this", metadata !6, i32 16777220, metadata !34, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
diff --git a/test/DebugInfo/X86/dbg-at-specficiation.ll b/test/DebugInfo/X86/dbg-at-specficiation.ll
index 4612087..be06ece 100644
--- a/test/DebugInfo/X86/dbg-at-specficiation.ll
+++ b/test/DebugInfo/X86/dbg-at-specficiation.ll
@@ -12,7 +12,7 @@
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 720948, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, [10 x i32]* @a, null} ; [ DW_TAG_variable ]
 !6 = metadata !{i32 720937, metadata !11} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 720897, null, metadata !"", null, i32 0, i64 320, i64 32, i32 0, i32 0, metadata !8, metadata !9, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 320, align 32, offset 0] [from int]
+!7 = metadata !{i32 720897, null, null, null, i32 0, i64 320, i64 32, i32 0, i32 0, metadata !8, metadata !9, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 320, align 32, offset 0] [from int]
 !8 = metadata !{i32 720932, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !9 = metadata !{metadata !10}
 !10 = metadata !{i32 720929, i64 0, i64 10}        ; [ DW_TAG_subrange_type ]
diff --git a/test/DebugInfo/X86/dbg-declare-arg.ll b/test/DebugInfo/X86/dbg-declare-arg.ll
index e475222..7da41aa 100644
--- a/test/DebugInfo/X86/dbg-declare-arg.ll
+++ b/test/DebugInfo/X86/dbg-declare-arg.ll
@@ -84,12 +84,12 @@ entry:
 !10 = metadata !{i32 786478, metadata !51, metadata !1, metadata !"A", metadata !"A", metadata !"", i32 2, metadata !11, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ]
 !11 = metadata !{i32 786453, metadata !51, metadata !3, metadata !"", i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !12, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !12 = metadata !{null, metadata !13}
-!13 = metadata !{i32 786447, metadata !2, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !1} ; [ DW_TAG_pointer_type ]
+!13 = metadata !{i32 786447, metadata !2, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !1} ; [ DW_TAG_pointer_type ]
 !14 = metadata !{i32 786478, metadata !51, metadata !1, metadata !"A", metadata !"A", metadata !"", i32 2, metadata !15, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ]
 !15 = metadata !{i32 786453, metadata !51, metadata !3, metadata !"", i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !16 = metadata !{null, metadata !13, metadata !17}
 !17 = metadata !{i32 589840, null, metadata !2, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !18} ; [ DW_TAG_reference_type ]
-!18 = metadata !{i32 786470, metadata !2, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !1} ; [ DW_TAG_const_type ]
+!18 = metadata !{i32 786470, metadata !2, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !1} ; [ DW_TAG_const_type ]
 !19 = metadata !{i32 786478, metadata !51, metadata !3, metadata !"foo", metadata !"foo", metadata !"_Z3fooi", i32 4, metadata !20, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.A*, i32)* @_Z3fooi, null, null, null, i32 0} ; [ DW_TAG_subprogram ] [line 4] [def] [scope 0] [foo]
 !20 = metadata !{i32 786453, metadata !51, metadata !3, metadata !"", i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !21, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !21 = metadata !{metadata !1}
diff --git a/test/DebugInfo/X86/dbg-declare.ll b/test/DebugInfo/X86/dbg-declare.ll
index 68468b0..aa8218a 100644
--- a/test/DebugInfo/X86/dbg-declare.ll
+++ b/test/DebugInfo/X86/dbg-declare.ll
@@ -34,11 +34,11 @@ declare void @llvm.stackrestore(i8*) nounwind
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !26, metadata !0, metadata !"foo", metadata !"foo", metadata !"", i32 6, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32*)* @foo, null, null, metadata !12, i32 0} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !26} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9, metadata !10}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
-!10 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
-!11 = metadata !{i32 786470, null, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !9} ; [ DW_TAG_const_type ]
+!10 = metadata !{i32 786447, null, null, null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
+!11 = metadata !{i32 786470, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !9} ; [ DW_TAG_const_type ]
 !12 = metadata !{metadata !13}
 !13 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !14 = metadata !{i32 786689, metadata !5, metadata !"x", metadata !6, i32 16777221, metadata !10, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
@@ -46,7 +46,7 @@ declare void @llvm.stackrestore(i8*) nounwind
 !16 = metadata !{i32 7, i32 13, metadata !17, null}
 !17 = metadata !{i32 786443, metadata !26, metadata !5, i32 6, i32 1, i32 0} ; [ DW_TAG_lexical_block ]
 !18 = metadata !{i32 786688, metadata !17, metadata !"a", metadata !6, i32 7, metadata !19, i32 0, i32 0} ; [ DW_TAG_auto_variable ]
-!19 = metadata !{i32 786433, null, metadata !"", null, i32 0, i64 0, i64 8, i32 0, i32 0, metadata !20, metadata !21, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 8, offset 0] [from char]
+!19 = metadata !{i32 786433, null, null, null, i32 0, i64 0, i64 8, i32 0, i32 0, metadata !20, metadata !21, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 8, offset 0] [from char]
 !20 = metadata !{i32 786468, null, null, metadata !"char", i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ]
 !21 = metadata !{metadata !22}
 !22 = metadata !{i32 786465, i64 0, i64 -1}        ; [ DW_TAG_subrange_type ]
diff --git a/test/DebugInfo/X86/dbg-large-unsigned-const.ll b/test/DebugInfo/X86/dbg-large-unsigned-const.ll
index a2c6475..5ec4f58 100644
--- a/test/DebugInfo/X86/dbg-large-unsigned-const.ll
+++ b/test/DebugInfo/X86/dbg-large-unsigned-const.ll
@@ -39,7 +39,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !6 = metadata !{i32 786478, metadata !32, null, metadata !"fn", metadata !"fn", metadata !"_Z2fnx", i32 6, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i1 (i64)* @_Z2fnx, null, null, metadata !31, i32 6} ; [ DW_TAG_subprogram ] [line 6] [def] [fn]
 !7 = metadata !{i32 786689, metadata !1, metadata !"LHS", metadata !2, i32 16777218, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
 !8 = metadata !{i32 786448, metadata !0, null, null, i32 0, i64 32, i64 32, i64 0, i32 0, metadata !9} ; [ DW_TAG_reference_type ]
-!9 = metadata !{i32 786470, metadata !0, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !10} ; [ DW_TAG_const_type ]
+!9 = metadata !{i32 786470, metadata !0, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !10} ; [ DW_TAG_const_type ]
 !10 = metadata !{i32 786468, null, metadata !0, metadata !"long long int", i32 0, i64 64, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !11 = metadata !{i32 786689, metadata !1, metadata !"RHS", metadata !2, i32 33554434, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
 !12 = metadata !{i32 786689, metadata !6, metadata !"a", metadata !2, i32 16777222, metadata !10, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
diff --git a/test/DebugInfo/X86/dbg-subrange.ll b/test/DebugInfo/X86/dbg-subrange.ll
index 94911c6..62580dc 100644
--- a/test/DebugInfo/X86/dbg-subrange.ll
+++ b/test/DebugInfo/X86/dbg-subrange.ll
@@ -19,13 +19,13 @@ entry:
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 720942, metadata !21, metadata !6, metadata !"bar", metadata !"bar", metadata !"", i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @bar, null, null, metadata !9, i32 0} ; [ DW_TAG_subprogram ] [line 4] [def] [scope 0] [bar]
 !6 = metadata !{i32 720937, metadata !21} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null}
 !9 = metadata !{metadata !10}
 !10 = metadata !{i32 720932}                      ; [ DW_TAG_base_type ]
 !11 = metadata !{metadata !13}
 !13 = metadata !{i32 720948, i32 0, null, metadata !"s", metadata !"s", metadata !"", metadata !6, i32 2, metadata !14, i32 0, i32 1, [4294967296 x i8]* @s, null} ; [ DW_TAG_variable ]
-!14 = metadata !{i32 720897, null, metadata !"", null, i32 0, i64 34359738368, i64 8, i32 0, i32 0, metadata !15, metadata !16, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 34359738368, align 8, offset 0] [from char]
+!14 = metadata !{i32 720897, null, null, null, i32 0, i64 34359738368, i64 8, i32 0, i32 0, metadata !15, metadata !16, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 34359738368, align 8, offset 0] [from char]
 !15 = metadata !{i32 720932, null, null, metadata !"char", i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ]
 !16 = metadata !{metadata !17}
 !17 = metadata !{i32 720929, i64 0, i64 4294967296} ; [ DW_TAG_subrange_type ]
diff --git a/test/DebugInfo/X86/debug-info-static-member.ll b/test/DebugInfo/X86/debug-info-static-member.ll
index 2f9dd12..ddaa687 100644
--- a/test/DebugInfo/X86/debug-info-static-member.ll
+++ b/test/DebugInfo/X86/debug-info-static-member.ll
@@ -63,7 +63,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !33, metadata !6, metadata !"main", metadata !"main", metadata !"", i32 18, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @main, null, null, metadata !1, i32 23} ; [ DW_TAG_subprogram ] [line 18] [def] [scope 23] [main]
 !6 = metadata !{i32 786473, metadata !33} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
 !10 = metadata !{metadata !12, metadata !27, metadata !28}
diff --git a/test/DebugInfo/X86/dwarf-public-names.ll b/test/DebugInfo/X86/dwarf-public-names.ll
index e5ae022..20f2033 100644
--- a/test/DebugInfo/X86/dwarf-public-names.ll
+++ b/test/DebugInfo/X86/dwarf-public-names.ll
@@ -95,9 +95,9 @@ attributes #1 = { nounwind readnone }
 !2 = metadata !{metadata !3, metadata !18, metadata !19, metadata !20}
 !3 = metadata !{i32 786478, metadata !4, null, metadata !"member_function", metadata !"member_function", metadata !"_ZN1C15member_functionEv", i32 9, metadata !5, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%struct.C*)* @_ZN1C15member_functionEv, null, metadata !12, metadata !1, i32 9} ; [ DW_TAG_subprogram ] [line 9] [def] [member_function]
 !4 = metadata !{i32 786473, metadata !37} ; [ DW_TAG_file_type ]
-!5 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!5 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !6 = metadata !{null, metadata !7}
-!7 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !8} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from C]
+!7 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !8} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from C]
 !8 = metadata !{i32 786451, metadata !37, null, metadata !"C", i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !9, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [C] [line 1, size 8, align 8, offset 0] [def] [from ]
 !9 = metadata !{metadata !10, metadata !12, metadata !14}
 !10 = metadata !{i32 786445, metadata !37, metadata !8, metadata !"static_member_variable", i32 4, i64 0, i64 0, i64 0, i32 4096, metadata !11, null} ; [ DW_TAG_member ] [static_member_variable] [line 4, size 0, align 0, offset 0] [static] [from int]
@@ -105,14 +105,14 @@ attributes #1 = { nounwind readnone }
 !12 = metadata !{i32 786478, metadata !4, metadata !8, metadata !"member_function", metadata !"member_function", metadata !"_ZN1C15member_functionEv", i32 2, metadata !5, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !13, i32 2} ; [ DW_TAG_subprogram ] [line 2] [member_function]
 !13 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
 !14 = metadata !{i32 786478, metadata !4, metadata !8, metadata !"static_member_function", metadata !"static_member_function", metadata !"_ZN1C22static_member_functionEv", i32 3, metadata !15, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !17, i32 3} ; [ DW_TAG_subprogram ] [line 3] [static_member_function]
-!15 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!15 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !16 = metadata !{metadata !11}
 !17 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
 !18 = metadata !{i32 786478, metadata !4, null, metadata !"static_member_function", metadata !"static_member_function", metadata !"_ZN1C22static_member_functionEv", i32 13, metadata !15, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @_ZN1C22static_member_functionEv, null, metadata !14, metadata !1, i32 13} ; [ DW_TAG_subprogram ] [line 13] [def] [static_member_function]
 !19 = metadata !{i32 786478, metadata !4, metadata !4, metadata !"global_function", metadata !"global_function", metadata !"_Z15global_functionv", i32 19, metadata !15, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @_Z15global_functionv, null, null, metadata !1, i32 19} ; [ DW_TAG_subprogram ] [line 19] [def] [global_function]
 !20 = metadata !{i32 786478, metadata !4, metadata !21, metadata !"global_namespace_function", metadata !"global_namespace_function", metadata !"_ZN2ns25global_namespace_functionEv", i32 24, metadata !22, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_ZN2ns25global_namespace_functionEv, null, null, metadata !1, i32 24} ; [ DW_TAG_subprogram ] [line 24] [def] [global_namespace_function]
 !21 = metadata !{i32 786489, null, metadata !"ns", metadata !4, i32 23} ; [ DW_TAG_namespace ] [/usr2/kparzysz/s.hex/t/dwarf-public-names.cpp]
-!22 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !23, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!22 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !23, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !23 = metadata !{null}
 !24 = metadata !{metadata !25, metadata !26, metadata !27}
 !25 = metadata !{i32 786484, i32 0, metadata !8, metadata !"static_member_variable", metadata !"static_member_variable", metadata !"_ZN1C22static_member_variableE", metadata !4, i32 7, metadata !11, i32 0, i32 1, i32* @_ZN1C22static_member_variableE, metadata !10} ; [ DW_TAG_variable ] [static_member_variable] [line 7] [def]
diff --git a/test/DebugInfo/X86/elf-names.ll b/test/DebugInfo/X86/elf-names.ll
index b30cd49..b85f5fb 100644
--- a/test/DebugInfo/X86/elf-names.ll
+++ b/test/DebugInfo/X86/elf-names.ll
@@ -63,9 +63,9 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !3 = metadata !{metadata !5, metadata !31}
 !5 = metadata !{i32 786478, metadata !6, null, metadata !"D", metadata !"D", metadata !"_ZN1DC2Ev", i32 12, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void (%class.D*)* @_ZN1DC2Ev, null, metadata !17, metadata !27, i32 12} ; [ DW_TAG_subprogram ] [line 12] [def] [D]
 !6 = metadata !{i32 786473, metadata !53} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null, metadata !9}
-!9 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !10} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from D]
+!9 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !10} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from D]
 !10 = metadata !{i32 786434, metadata !53, null, metadata !"D", i32 1, i64 128, i64 32, i32 0, i32 0, null, metadata !11, i32 0, null, null, null} ; [ DW_TAG_class_type ] [D] [line 1, size 128, align 32, offset 0] [def] [from ]
 !11 = metadata !{metadata !12, metadata !14, metadata !15, metadata !16, metadata !17, metadata !20}
 !12 = metadata !{i32 786445, metadata !53, metadata !10, metadata !"c1", i32 6, i64 32, i64 32, i64 0, i32 1, metadata !13} ; [ DW_TAG_member ] [c1] [line 6, size 32, align 32, offset 0] [private] [from int]
@@ -77,7 +77,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !18 = metadata !{metadata !19}
 !19 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
 !20 = metadata !{i32 786478, metadata !6, metadata !10, metadata !"D", metadata !"D", metadata !"", i32 4, metadata !21, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, metadata !25, i32 4} ; [ DW_TAG_subprogram ] [line 4] [D]
-!21 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !22, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!21 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !22, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !22 = metadata !{null, metadata !9, metadata !23}
 !23 = metadata !{i32 786448, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !24} ; [ DW_TAG_reference_type ] [line 0, size 0, align 0, offset 0] [from ]
 !24 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !10} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from D]
diff --git a/test/DebugInfo/X86/empty-and-one-elem-array.ll b/test/DebugInfo/X86/empty-and-one-elem-array.ll
index 9e80865..57e0e18 100644
--- a/test/DebugInfo/X86/empty-and-one-elem-array.ll
+++ b/test/DebugInfo/X86/empty-and-one-elem-array.ll
@@ -66,7 +66,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !6, metadata !6, metadata !"func", metadata !"func", metadata !"", i32 11, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 false, i32 ()* @func, null, null, metadata !1, i32 11} ; [ DW_TAG_subprogram ] [line 11] [def] [func]
 !6 = metadata !{i32 786473, metadata !32} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
 !10 = metadata !{i32 786688, metadata !11, metadata !"my_foo", metadata !6, i32 12, metadata !12, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [my_foo] [line 12]
diff --git a/test/DebugInfo/X86/empty-array.ll b/test/DebugInfo/X86/empty-array.ll
index f8d1fc1..c0a422b 100644
--- a/test/DebugInfo/X86/empty-array.ll
+++ b/test/DebugInfo/X86/empty-array.ll
@@ -37,9 +37,9 @@
 !12 = metadata !{metadata !13}
 !13 = metadata !{i32 786465, i64 0, i64 -1} ; [ DW_TAG_subrange_type ] [unbound]
 !14 = metadata !{i32 786478, metadata !6, metadata !7, metadata !"A", metadata !"A", metadata !"", i32 1, metadata !15, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !18, i32 1} ; [ DW_TAG_subprogram ] [line 1] [A]
-!15 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!15 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !16 = metadata !{null, metadata !17}
-!17 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !7} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
+!17 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !7} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
 !18 = metadata !{metadata !19}
 !19 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
 !20 = metadata !{metadata !"t.cpp", metadata !"/Volumes/Sandbox/llvm"}
diff --git a/test/DebugInfo/X86/ending-run.ll b/test/DebugInfo/X86/ending-run.ll
index e212a0f..b914d69 100644
--- a/test/DebugInfo/X86/ending-run.ll
+++ b/test/DebugInfo/X86/ending-run.ll
@@ -33,7 +33,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !19, metadata !6, metadata !"callee", metadata !"callee", metadata !"", i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 false, i32 (i32)* @callee, null, null, metadata !10, i32 7} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !19} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9, metadata !9}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !10 = metadata !{metadata !11}
diff --git a/test/DebugInfo/X86/linkage-name.ll b/test/DebugInfo/X86/linkage-name.ll
index e5902f9..0c27427 100644
--- a/test/DebugInfo/X86/linkage-name.ll
+++ b/test/DebugInfo/X86/linkage-name.ll
@@ -31,10 +31,10 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !6, null, metadata !"a", metadata !"a", metadata !"_ZN1A1aEi", i32 5, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (%class.A*, i32)* @_ZN1A1aEi, null, metadata !13, metadata !16, i32 5} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !28} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9, metadata !10, metadata !9}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
-!10 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !11} ; [ DW_TAG_pointer_type ]
+!10 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !11} ; [ DW_TAG_pointer_type ]
 !11 = metadata !{i32 786434, metadata !28, null, metadata !"A", i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !12, i32 0, null, null, null} ; [ DW_TAG_class_type ] [A] [line 1, size 8, align 8, offset 0] [def] [from ]
 !12 = metadata !{metadata !13}
 !13 = metadata !{i32 786478, metadata !6, metadata !11, metadata !"a", metadata !"a", metadata !"_ZN1A1aEi", i32 2, metadata !7, i1 false, i1 false, i32 0, i32 0, null, i32 257, i1 false, null, null, i32 0, metadata !14, i32 0} ; [ DW_TAG_subprogram ]
diff --git a/test/DebugInfo/X86/low-pc-cu.ll b/test/DebugInfo/X86/low-pc-cu.ll
index 6828208..56706eb 100644
--- a/test/DebugInfo/X86/low-pc-cu.ll
+++ b/test/DebugInfo/X86/low-pc-cu.ll
@@ -19,7 +19,7 @@ entry:
 !3 = metadata !{metadata !5, metadata !12}
 !5 = metadata !{i32 786478, metadata !6, null, metadata !"q", metadata !"q", metadata !"_Z1qv", i32 5, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @_Z1qv, null, null, metadata !10, i32 0} ; [ DW_TAG_subprogram ] [line 5] [def] [scope 0] [q]
 !6 = metadata !{i32 786473, metadata !15} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 786468, metadata !15, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !10 = metadata !{metadata !11}
diff --git a/test/DebugInfo/X86/misched-dbg-value.ll b/test/DebugInfo/X86/misched-dbg-value.ll
index 50b1bc8..bbfa500 100644
--- a/test/DebugInfo/X86/misched-dbg-value.ll
+++ b/test/DebugInfo/X86/misched-dbg-value.ll
@@ -102,7 +102,7 @@ attributes #1 = { nounwind readnone }
 !10 = metadata !{i32 0}
 !11 = metadata !{metadata !12}
 !12 = metadata !{i32 786478, metadata !82, metadata !3, metadata !"Proc8", metadata !"Proc8", metadata !"", i32 180, metadata !13, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 true, void (i32*, [51 x i32]*, i32, i32)* @Proc8, null, null, metadata !22, i32 185} ; [ DW_TAG_subprogram ] [line 180] [def] [scope 185] [Proc8]
-!13 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !14, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!13 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !14, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !14 = metadata !{null, metadata !15, metadata !17, metadata !21, metadata !21}
 !15 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !16} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from int]
 !16 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
diff --git a/test/DebugInfo/X86/multiple-at-const-val.ll b/test/DebugInfo/X86/multiple-at-const-val.ll
index 8842d3a..74a2e9c 100644
--- a/test/DebugInfo/X86/multiple-at-const-val.ll
+++ b/test/DebugInfo/X86/multiple-at-const-val.ll
@@ -45,7 +45,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !32 = metadata !{i32 786472, metadata !"_S_os_ostate_end", i64 65536} ; [ DW_TAG_enumerator ] [_S_os_ostate_end :: 65536]
 !49 = metadata !{i32 786434, metadata !1801, metadata !4, metadata !"os_base", i32 200, i64 1728, i64 64, i32 0, i32 0, null, metadata !50, i32 0, metadata !49, null, null} ; [ DW_TAG_class_type ] [os_base] [line 200, size 1728, align 64, offset 0] [def] [from ]
 !50 = metadata !{metadata !77}
-!54 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !55, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!54 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !55, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !55 = metadata !{metadata !56}
 !56 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !77 = metadata !{i32 786445, metadata !1801, metadata !49, metadata !"badbit", i32 331, i64 0, i64 0, i64 0, i32 4096, metadata !78, i32 1} ; [ DW_TAG_member ]
diff --git a/test/DebugInfo/X86/nondefault-subrange-array.ll b/test/DebugInfo/X86/nondefault-subrange-array.ll
index 0776fb0..44d35a2 100644
--- a/test/DebugInfo/X86/nondefault-subrange-array.ll
+++ b/test/DebugInfo/X86/nondefault-subrange-array.ll
@@ -40,9 +40,9 @@
 !12 = metadata !{metadata !13}
 !13 = metadata !{i32 786465, i64 -3, i64 42} ; [ DW_TAG_subrange_type ] [-3, 39]
 !14 = metadata !{i32 786478, metadata !6, metadata !7, metadata !"A", metadata !"A", metadata !"", i32 1, metadata !15, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !18, i32 1} ; [ DW_TAG_subprogram ] [line 1] [A]
-!15 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!15 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !16 = metadata !{null, metadata !17}
-!17 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !7} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
+!17 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !7} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
 !18 = metadata !{metadata !19}
 !19 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
 !20 = metadata !{metadata !"t.cpp", metadata !"/Volumes/Sandbox/llvm"}
diff --git a/test/DebugInfo/X86/op_deref.ll b/test/DebugInfo/X86/op_deref.ll
index 1f55dd0..a56dd66 100644
--- a/test/DebugInfo/X86/op_deref.ll
+++ b/test/DebugInfo/X86/op_deref.ll
@@ -70,7 +70,7 @@ declare void @llvm.stackrestore(i8*) nounwind
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !28, metadata !6, metadata !"testVLAwithSize", metadata !"testVLAwithSize", metadata !"", i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (i32)* @testVLAwithSize, null, null, metadata !1, i32 2} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !28} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null, metadata !9}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !10 = metadata !{i32 786689, metadata !5, metadata !"s", metadata !6, i32 16777217, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
diff --git a/test/DebugInfo/X86/pr11300.ll b/test/DebugInfo/X86/pr11300.ll
index 4283dbc..423a5e7 100644
--- a/test/DebugInfo/X86/pr11300.ll
+++ b/test/DebugInfo/X86/pr11300.ll
@@ -36,15 +36,15 @@ entry:
 !3 = metadata !{metadata !5, metadata !20}
 !5 = metadata !{i32 720942, metadata !6, metadata !6, metadata !"zed", metadata !"zed", metadata !"_Z3zedP3foo", i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%struct.foo*)* @_Z3zedP3foo, null, null, metadata !21, i32 4} ; [ DW_TAG_subprogram ] [line 4] [def] [zed]
 !6 = metadata !{i32 720937, metadata !32} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null, metadata !9}
 !9 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !10} ; [ DW_TAG_pointer_type ]
 !10 = metadata !{i32 720898, metadata !32, null, metadata !"foo", i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !11, i32 0, null, null, null} ; [ DW_TAG_class_type ] [foo] [line 1, size 8, align 8, offset 0] [def] [from ]
 !11 = metadata !{metadata !12}
 !12 = metadata !{i32 720942, metadata !6, metadata !10, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEv", i32 2, metadata !13, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !16, i32 2} ; [ DW_TAG_subprogram ]
-!13 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !14, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!13 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !14, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !14 = metadata !{null, metadata !15}
-!15 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !10} ; [ DW_TAG_pointer_type ]
+!15 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !10} ; [ DW_TAG_pointer_type ]
 !16 = metadata !{metadata !17}
 !17 = metadata !{i32 720932}                      ; [ DW_TAG_base_type ]
 !18 = metadata !{metadata !19}
diff --git a/test/DebugInfo/X86/pr12831.ll b/test/DebugInfo/X86/pr12831.ll
index a5910d9..4d07873 100644
--- a/test/DebugInfo/X86/pr12831.ll
+++ b/test/DebugInfo/X86/pr12831.ll
@@ -82,42 +82,42 @@ entry:
 !3 = metadata !{metadata !5, metadata !106, metadata !107, metadata !126, metadata !127}
 !5 = metadata !{i32 786478, metadata !6, null, metadata !"writeExpr", metadata !"writeExpr", metadata !"_ZN17BPLFunctionWriter9writeExprEv", i32 19, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.BPLFunctionWriter*)* @_ZN17BPLFunctionWriter9writeExprEv, null, metadata !103, metadata !1, i32 19} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !160} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null, metadata !9}
-!9 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !10} ; [ DW_TAG_pointer_type ]
+!9 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !10} ; [ DW_TAG_pointer_type ]
 !10 = metadata !{i32 786434, metadata !160, null, metadata !"BPLFunctionWriter", i32 15, i64 64, i64 64, i32 0, i32 0, null, metadata !11, i32 0, null, null, null} ; [ DW_TAG_class_type ] [BPLFunctionWriter] [line 15, size 64, align 64, offset 0] [def] [from ]
 !11 = metadata !{metadata !12, metadata !103}
 !12 = metadata !{i32 786445, metadata !160, metadata !10, metadata !"MW", i32 16, i64 64, i64 64, i64 0, i32 1, metadata !13} ; [ DW_TAG_member ]
-!13 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !14} ; [ DW_TAG_pointer_type ]
+!13 = metadata !{i32 786447, null, null, null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !14} ; [ DW_TAG_pointer_type ]
 !14 = metadata !{i32 786434, metadata !160, null, metadata !"BPLModuleWriter", i32 12, i64 8, i64 8, i32 0, i32 0, null, metadata !15, i32 0, null, null, null} ; [ DW_TAG_class_type ] [BPLModuleWriter] [line 12, size 8, align 8, offset 0] [def] [from ]
 !15 = metadata !{metadata !16}
 !16 = metadata !{i32 786478, metadata !6, metadata !14, metadata !"writeIntrinsic", metadata !"writeIntrinsic", metadata !"_ZN15BPLModuleWriter14writeIntrinsicE8functionIFvvEE", i32 13, metadata !17, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !101, i32 13} ; [ DW_TAG_subprogram ]
-!17 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !18, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!17 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !18, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !18 = metadata !{null, metadata !19, metadata !20}
-!19 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !14} ; [ DW_TAG_pointer_type ]
+!19 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !14} ; [ DW_TAG_pointer_type ]
 !20 = metadata !{i32 786434, metadata !160, null, metadata !"function<void ()>", i32 6, i64 8, i64 8, i32 0, i32 0, null, metadata !21, i32 0, null, metadata !97, null} ; [ DW_TAG_class_type ] [function<void ()>] [line 6, size 8, align 8, offset 0] [def] [from ]
 !21 = metadata !{metadata !22, metadata !51, metadata !58, metadata !86, metadata !92}
 !22 = metadata !{i32 786478, metadata !6, metadata !20, metadata !"function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:20:36> >", metadata !"function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:20:36> >", metadata !"", i32 8, metadata !23, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, metadata !47, i32 0, metadata !49, i32 8} ; [ DW_TAG_subprogram ]
-!23 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !24, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!23 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !24, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !24 = metadata !{null, metadata !25, metadata !26}
-!25 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !20} ; [ DW_TAG_pointer_type ]
+!25 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !20} ; [ DW_TAG_pointer_type ]
 !26 = metadata !{i32 786434, metadata !160, metadata !5, metadata !"", i32 20, i64 8, i64 8, i32 0, i32 0, null, metadata !27, i32 0, null, null, null} ; [ DW_TAG_class_type ] [line 20, size 8, align 8, offset 0] [def] [from ]
 !27 = metadata !{metadata !28, metadata !35, metadata !41}
 !28 = metadata !{i32 786478, metadata !6, metadata !26, metadata !"operator()", metadata !"operator()", metadata !"", i32 20, metadata !29, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !33, i32 20} ; [ DW_TAG_subprogram ]
-!29 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !30, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!29 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !30, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !30 = metadata !{null, metadata !31}
-!31 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !32} ; [ DW_TAG_pointer_type ]
-!32 = metadata !{i32 786470, null, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !26} ; [ DW_TAG_const_type ]
+!31 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !32} ; [ DW_TAG_pointer_type ]
+!32 = metadata !{i32 786470, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !26} ; [ DW_TAG_const_type ]
 !33 = metadata !{metadata !34}
 !34 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !35 = metadata !{i32 786478, metadata !6, metadata !26, metadata !"~", metadata !"~", metadata !"", i32 20, metadata !36, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !39, i32 20} ; [ DW_TAG_subprogram ]
-!36 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !37, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!36 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !37, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !37 = metadata !{null, metadata !38}
-!38 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !26} ; [ DW_TAG_pointer_type ]
+!38 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !26} ; [ DW_TAG_pointer_type ]
 !39 = metadata !{metadata !40}
 !40 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !41 = metadata !{i32 786478, metadata !6, metadata !26, metadata !"", metadata !"", metadata !"", i32 20, metadata !42, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !45, i32 20} ; [ DW_TAG_subprogram ]
-!42 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !43, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!42 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !43, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !43 = metadata !{null, metadata !38, metadata !44}
 !44 = metadata !{i32 786498, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !26} ; [ DW_TAG_rvalue_reference_type ]
 !45 = metadata !{metadata !46}
@@ -127,32 +127,32 @@ entry:
 !49 = metadata !{metadata !50}
 !50 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !51 = metadata !{i32 786478, metadata !6, metadata !20, metadata !"function<function<void ()> >", metadata !"function<function<void ()> >", metadata !"", i32 8, metadata !52, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, metadata !54, i32 0, metadata !56, i32 8} ; [ DW_TAG_subprogram ]
-!52 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !53, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!52 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !53, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !53 = metadata !{null, metadata !25, metadata !20}
 !54 = metadata !{metadata !55}
 !55 = metadata !{i32 786479, null, metadata !"_Functor", metadata !20, null, i32 0, i32 0} ; [ DW_TAG_template_type_parameter ]
 !56 = metadata !{metadata !57}
 !57 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !58 = metadata !{i32 786478, metadata !6, metadata !20, metadata !"function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:23:36> >", metadata !"function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:23:36> >", metadata !"", i32 8, metadata !59, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, metadata !82, i32 0, metadata !84, i32 8} ; [ DW_TAG_subprogram ]
-!59 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !60, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!59 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !60, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !60 = metadata !{null, metadata !25, metadata !61}
 !61 = metadata !{i32 786434, metadata !160, metadata !5, metadata !"", i32 23, i64 8, i64 8, i32 0, i32 0, null, metadata !62, i32 0, null, null, null} ; [ DW_TAG_class_type ] [line 23, size 8, align 8, offset 0] [def] [from ]
 !62 = metadata !{metadata !63, metadata !70, metadata !76}
 !63 = metadata !{i32 786478, metadata !6, metadata !61, metadata !"operator()", metadata !"operator()", metadata !"", i32 23, metadata !64, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !68, i32 23} ; [ DW_TAG_subprogram ]
-!64 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !65, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!64 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !65, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !65 = metadata !{null, metadata !66}
-!66 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !67} ; [ DW_TAG_pointer_type ]
-!67 = metadata !{i32 786470, null, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !61} ; [ DW_TAG_const_type ]
+!66 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !67} ; [ DW_TAG_pointer_type ]
+!67 = metadata !{i32 786470, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !61} ; [ DW_TAG_const_type ]
 !68 = metadata !{metadata !69}
 !69 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !70 = metadata !{i32 786478, metadata !6, metadata !61, metadata !"~", metadata !"~", metadata !"", i32 23, metadata !71, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !74, i32 23} ; [ DW_TAG_subprogram ]
-!71 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !72, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!71 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !72, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !72 = metadata !{null, metadata !73}
-!73 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !61} ; [ DW_TAG_pointer_type ]
+!73 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !61} ; [ DW_TAG_pointer_type ]
 !74 = metadata !{metadata !75}
 !75 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !76 = metadata !{i32 786478, metadata !6, metadata !61, metadata !"", metadata !"", metadata !"", i32 23, metadata !77, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !80, i32 23} ; [ DW_TAG_subprogram ]
-!77 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !78, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!77 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !78, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !78 = metadata !{null, metadata !73, metadata !79}
 !79 = metadata !{i32 786498, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !61} ; [ DW_TAG_rvalue_reference_type ]
 !80 = metadata !{metadata !81}
@@ -162,19 +162,19 @@ entry:
 !84 = metadata !{metadata !85}
 !85 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !86 = metadata !{i32 786478, metadata !6, metadata !20, metadata !"function", metadata !"function", metadata !"", i32 6, metadata !87, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !90, i32 6} ; [ DW_TAG_subprogram ]
-!87 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !88, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!87 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !88, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !88 = metadata !{null, metadata !25, metadata !89}
 !89 = metadata !{i32 786498, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !20} ; [ DW_TAG_rvalue_reference_type ]
 !90 = metadata !{metadata !91}
 !91 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !92 = metadata !{i32 786478, metadata !6, metadata !20, metadata !"~function", metadata !"~function", metadata !"", i32 6, metadata !93, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !95, i32 6} ; [ DW_TAG_subprogram ]
-!93 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !94, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!93 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !94, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !94 = metadata !{null, metadata !25}
 !95 = metadata !{metadata !96}
 !96 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !97 = metadata !{metadata !98}
 !98 = metadata !{i32 786479, null, metadata !"T", metadata !99, null, i32 0, i32 0} ; [ DW_TAG_template_type_parameter ]
-!99 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !100, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
+!99 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !100, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
 !100 = metadata !{null}
 !101 = metadata !{metadata !102}
 !102 = metadata !{i32 786468}                     ; [ DW_TAG_base_type ]
@@ -183,7 +183,7 @@ entry:
 !105 = metadata !{i32 786468}                     ; [ DW_TAG_base_type ]
 !106 = metadata !{i32 786478, metadata !6, null, metadata !"function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:23:36> >", metadata !"function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:23:36> >", metadata !"_ZN8functionIFvvEEC2IZN17BPLFunctionWriter9writeExprEvE3$_1_0EET_", i32 8, metadata !59, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.function*)* @"_ZN8functionIFvvEEC2IZN17BPLFunctionWriter9writeExprEvE3$_1_0EET_", metadata !82, metadata !58, metadata !1, i32 8} ; [ DW_TAG_subprogram ]
 !107 = metadata !{i32 786478, metadata !6, null, metadata !"_M_not_empty_function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:23:36> >", metadata !"_M_not_empty_function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:23:36> >", metadata !"_ZN13_Base_manager21_M_not_empty_functionIZN17BPLFunctionWriter9writeExprEvE3$_1_0EEvRKT_", i32 3, metadata !108, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.anon.0*)* @"_ZN13_Base_manager21_M_not_empty_functionIZN17BPLFunctionWriter9writeExprEvE3$_1_0EEvRKT_", metadata !111, metadata !113, metadata !1, i32 3} ; [ DW_TAG_subprogram ]
-!108 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !109, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!108 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !109, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !109 = metadata !{null, metadata !110}
 !110 = metadata !{i32 786448, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !61} ; [ DW_TAG_reference_type ]
 !111 = metadata !{metadata !112}
@@ -192,7 +192,7 @@ entry:
 !114 = metadata !{i32 786434, metadata !160, null, metadata !"_Base_manager", i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !115, i32 0, null, null, null} ; [ DW_TAG_class_type ] [_Base_manager] [line 1, size 8, align 8, offset 0] [def] [from ]
 !115 = metadata !{metadata !116, metadata !113}
 !116 = metadata !{i32 786478, metadata !6, metadata !114, metadata !"_M_not_empty_function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:20:36> >", metadata !"_M_not_empty_function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:20:36> >", metadata !"_ZN13_Base_manager21_M_not_empty_functionIZN17BPLFunctionWriter9writeExprEvE3$_0EEvRKT_", i32 3, metadata !117, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, metadata !120, i32 0, metadata !122, i32 3} ; [ DW_TAG_subprogram ]
-!117 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !118, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!117 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !118, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !118 = metadata !{null, metadata !119}
 !119 = metadata !{i32 786448, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !26} ; [ DW_TAG_reference_type ]
 !120 = metadata !{metadata !121}
@@ -208,14 +208,14 @@ entry:
 !131 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !132} ; [ DW_TAG_const_type ]
 !132 = metadata !{i32 786468, null, null, metadata !"bool", i32 0, i64 8, i64 8, i64 0, i32 0, i32 2} ; [ DW_TAG_base_type ]
 !133 = metadata !{i32 786689, metadata !5, metadata !"this", metadata !6, i32 16777235, metadata !134, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
-!134 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !10} ; [ DW_TAG_pointer_type ]
+!134 = metadata !{i32 786447, null, null, null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !10} ; [ DW_TAG_pointer_type ]
 !135 = metadata !{i32 19, i32 39, metadata !5, null}
 !136 = metadata !{i32 20, i32 17, metadata !137, null}
 !137 = metadata !{i32 786443, metadata !5, i32 19, i32 51, metadata !6, i32 0} ; [ DW_TAG_lexical_block ]
 !138 = metadata !{i32 23, i32 17, metadata !137, null}
 !139 = metadata !{i32 26, i32 15, metadata !137, null}
 !140 = metadata !{i32 786689, metadata !106, metadata !"this", metadata !6, i32 16777224, metadata !141, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
-!141 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !20} ; [ DW_TAG_pointer_type ]
+!141 = metadata !{i32 786447, null, null, null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !20} ; [ DW_TAG_pointer_type ]
 !142 = metadata !{i32 8, i32 45, metadata !106, null}
 !143 = metadata !{i32 786689, metadata !106, metadata !"__f", metadata !6, i32 33554440, metadata !61, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
 !144 = metadata !{i32 8, i32 63, metadata !106, null}
diff --git a/test/DebugInfo/X86/subrange-type.ll b/test/DebugInfo/X86/subrange-type.ll
index cd1d57c..7fd273b 100644
--- a/test/DebugInfo/X86/subrange-type.ll
+++ b/test/DebugInfo/X86/subrange-type.ll
@@ -25,7 +25,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !6, metadata !6, metadata !"main", metadata !"main", metadata !"", i32 2, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @main, null, null, metadata !1, i32 3} ; [ DW_TAG_subprogram ] [line 2] [def] [scope 3] [main]
 !6 = metadata !{i32 786473, metadata !17} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
 !10 = metadata !{i32 786688, metadata !11, metadata !"i", metadata !6, i32 4, metadata !12, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [i] [line 4]
diff --git a/test/DebugInfo/dwarf-public-names.ll b/test/DebugInfo/dwarf-public-names.ll
index e9eb13d..ee9cbd5 100644
--- a/test/DebugInfo/dwarf-public-names.ll
+++ b/test/DebugInfo/dwarf-public-names.ll
@@ -92,9 +92,9 @@ attributes #1 = { nounwind readnone }
 !2 = metadata !{metadata !3, metadata !18, metadata !19, metadata !20}
 !3 = metadata !{i32 786478, metadata !4, null, metadata !"member_function", metadata !"member_function", metadata !"_ZN1C15member_functionEv", i32 9, metadata !5, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%struct.C*)* @_ZN1C15member_functionEv, null, metadata !12, metadata !1, i32 9} ; [ DW_TAG_subprogram ] [line 9] [def] [member_function]
 !4 = metadata !{i32 786473, metadata !37} ; [ DW_TAG_file_type ]
-!5 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!5 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !6 = metadata !{null, metadata !7}
-!7 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !8} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from C]
+!7 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !8} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from C]
 !8 = metadata !{i32 786451, metadata !37, null, metadata !"C", i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !9, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [C] [line 1, size 8, align 8, offset 0] [def] [from ]
 !9 = metadata !{metadata !10, metadata !12, metadata !14}
 !10 = metadata !{i32 786445, metadata !37, metadata !8, metadata !"static_member_variable", i32 4, i64 0, i64 0, i64 0, i32 4096, metadata !11, null} ; [ DW_TAG_member ] [static_member_variable] [line 4, size 0, align 0, offset 0] [static] [from int]
@@ -102,14 +102,14 @@ attributes #1 = { nounwind readnone }
 !12 = metadata !{i32 786478, metadata !4, metadata !8, metadata !"member_function", metadata !"member_function", metadata !"_ZN1C15member_functionEv", i32 2, metadata !5, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !13, i32 2} ; [ DW_TAG_subprogram ] [line 2] [member_function]
 !13 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
 !14 = metadata !{i32 786478, metadata !4, metadata !8, metadata !"static_member_function", metadata !"static_member_function", metadata !"_ZN1C22static_member_functionEv", i32 3, metadata !15, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !17, i32 3} ; [ DW_TAG_subprogram ] [line 3] [static_member_function]
-!15 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!15 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !16 = metadata !{metadata !11}
 !17 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
 !18 = metadata !{i32 786478, metadata !4, null, metadata !"static_member_function", metadata !"static_member_function", metadata !"_ZN1C22static_member_functionEv", i32 13, metadata !15, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @_ZN1C22static_member_functionEv, null, metadata !14, metadata !1, i32 13} ; [ DW_TAG_subprogram ] [line 13] [def] [static_member_function]
 !19 = metadata !{i32 786478, metadata !4, metadata !4, metadata !"global_function", metadata !"global_function", metadata !"_Z15global_functionv", i32 19, metadata !15, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @_Z15global_functionv, null, null, metadata !1, i32 19} ; [ DW_TAG_subprogram ] [line 19] [def] [global_function]
 !20 = metadata !{i32 786478, metadata !4, metadata !21, metadata !"global_namespace_function", metadata !"global_namespace_function", metadata !"_ZN2ns25global_namespace_functionEv", i32 24, metadata !22, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_ZN2ns25global_namespace_functionEv, null, null, metadata !1, i32 24} ; [ DW_TAG_subprogram ] [line 24] [def] [global_namespace_function]
 !21 = metadata !{i32 786489, null, metadata !"ns", metadata !4, i32 23} ; [ DW_TAG_namespace ] [/usr2/kparzysz/s.hex/t/dwarf-public-names.cpp]
-!22 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !23, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!22 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !23, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !23 = metadata !{null}
 !24 = metadata !{metadata !25, metadata !26, metadata !27}
 !25 = metadata !{i32 786484, i32 0, metadata !8, metadata !"static_member_variable", metadata !"static_member_variable", metadata !"_ZN1C22static_member_variableE", metadata !4, i32 7, metadata !11, i32 0, i32 1, i32* @_ZN1C22static_member_variableE, metadata !10} ; [ DW_TAG_variable ] [static_member_variable] [line 7] [def]
diff --git a/test/DebugInfo/inheritance.ll b/test/DebugInfo/inheritance.ll
index dcc7c14..6b3ae09 100644
--- a/test/DebugInfo/inheritance.ll
+++ b/test/DebugInfo/inheritance.ll
@@ -110,29 +110,29 @@ declare void @_ZdlPv(i8*) nounwind
 !2 = metadata !{i32 458763, metadata !44, metadata !3, i32 0, i32 0, i32 0} ; [ DW_TAG_lexical_block ]
 !3 = metadata !{i32 458798, i32 0, metadata !4, metadata !"main", metadata !"main", metadata !"main", i32 11, metadata !5, i1 false, i1 true, i32 0, i32 0, null, i1 false, i32 0, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ]
 !4 = metadata !{i32 458769, metadata !44, i32 4, metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 true, metadata !"", i32 0, metadata !45, metadata !45, null, null, null, metadata !""} ; [ DW_TAG_compile_unit ]
-!5 = metadata !{i32 458773, metadata !4, metadata !"", metadata !4, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!5 = metadata !{i32 458773, metadata !4, null, metadata !4, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !6 = metadata !{metadata !7}
 !7 = metadata !{i32 458788, null, metadata !4, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !8 = metadata !{i32 458771, metadata !44, metadata !4, metadata !"test1", i32 1, i64 64, i64 64, i64 0, i32 0, null, metadata !9, i32 0, metadata !8, null, null} ; [ DW_TAG_structure_type ] [test1] [line 1, size 64, align 64, offset 0] [def] [from ]
 !9 = metadata !{metadata !10, metadata !14, metadata !18}
 !10 = metadata !{i32 458765, metadata !44, metadata !8, metadata !"_vptr$test1", i32 1, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_member ]
-!11 = metadata !{i32 458767, metadata !4, metadata !"", metadata !4, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !12} ; [ DW_TAG_pointer_type ]
+!11 = metadata !{i32 458767, metadata !4, null, metadata !4, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !12} ; [ DW_TAG_pointer_type ]
 !12 = metadata !{i32 458767, null, metadata !4, metadata !"__vtbl_ptr_type", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !5} ; [ DW_TAG_pointer_type ]
 !13 = metadata !{i32 458769, metadata !46, i32 4, metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 false, metadata !"", i32 0, metadata !45, metadata !45, null, null, null, metadata !""} ; [ DW_TAG_compile_unit ]
 !14 = metadata !{i32 458798, i32 0, metadata !8, metadata !"test1", metadata !"test1", metadata !"", i32 1, metadata !15, i1 false, i1 false, i32 0, i32 0, null, i1 true, i32 0, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ]
-!15 = metadata !{i32 458773, metadata !4, metadata !"", metadata !4, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!15 = metadata !{i32 458773, metadata !4, null, metadata !4, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !16 = metadata !{null, metadata !17}
-!17 = metadata !{i32 458767, metadata !4, metadata !"", metadata !4, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !8} ; [ DW_TAG_pointer_type ]
+!17 = metadata !{i32 458767, metadata !4, null, metadata !4, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !8} ; [ DW_TAG_pointer_type ]
 !18 = metadata !{i32 458798, i32 0, metadata !8, metadata !"~test1", metadata !"~test1", metadata !"", i32 4, metadata !19, i1 false, i1 false, i32 1, i32 0, metadata !8, i1 false, i32 0, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ]
-!19 = metadata !{i32 458773, metadata !4, metadata !"", metadata !4, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !20, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!19 = metadata !{i32 458773, metadata !4, null, metadata !4, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !20, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !20 = metadata !{null, metadata !17, metadata !7}
 !21 = metadata !{i32 11, i32 0, metadata !1, null}
 !22 = metadata !{i32 13, i32 0, metadata !1, null}
 !23 = metadata !{i32 14, i32 0, metadata !1, null}
 !24 = metadata !{i32 459009, metadata !25, metadata !"this", metadata !4, i32 13, metadata !26} ; [ DW_TAG_arg_variable ]
 !25 = metadata !{i32 458798, i32 0, metadata !4, metadata !"test1", metadata !"test1", metadata !"_ZN5test1C1Ev", i32 1, metadata !15, i1 false, i1 true, i32 0, i32 0, null, i1 false, i32 0, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ]
-!26 = metadata !{i32 458790, metadata !4, metadata !"", metadata !4, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !27} ; [ DW_TAG_const_type ]
-!27 = metadata !{i32 458767, metadata !4, metadata !"", metadata !4, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !8} ; [ DW_TAG_pointer_type ]
+!26 = metadata !{i32 458790, metadata !4, null, metadata !4, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !27} ; [ DW_TAG_const_type ]
+!27 = metadata !{i32 458767, metadata !4, null, metadata !4, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !8} ; [ DW_TAG_pointer_type ]
 !28 = metadata !{i32 1, i32 0, metadata !25, null}
 !29 = metadata !{i32 1, i32 0, metadata !30, null}
 !30 = metadata !{i32 458763, metadata !44, metadata !31, i32 0, i32 0, i32 0} ; [ DW_TAG_lexical_block ]
diff --git a/test/DebugInfo/member-pointers.ll b/test/DebugInfo/member-pointers.ll
index c562b71..42b57f5 100644
--- a/test/DebugInfo/member-pointers.ll
+++ b/test/DebugInfo/member-pointers.ll
@@ -32,7 +32,7 @@
 !9 = metadata !{i32 786451, metadata !15, null, metadata !"S", i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !1, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [S] [line 1, size 8, align 8, offset 0] [def] [from ]
 !10 = metadata !{i32 786484, i32 0, null, metadata !"y", metadata !"y", metadata !"", metadata !6, i32 5, metadata !11, i32 0, i32 1, { i64, i64 }* @y, null} ; [ DW_TAG_variable ] [y] [line 5] [def]
 !11 = metadata !{i32 786463, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !12, metadata !9} ; [ DW_TAG_ptr_to_member_type ] [line 0, size 0, align 0, offset 0] [from ]
-!12 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!12 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !13 = metadata !{null, metadata !14, metadata !8}
-!14 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !9} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from S]
+!14 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !9} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from S]
 !15 = metadata !{metadata !"simple.cpp", metadata !"/home/blaikie/Development/scratch"}
diff --git a/test/Instrumentation/AddressSanitizer/debug_info.ll b/test/Instrumentation/AddressSanitizer/debug_info.ll
index 7cb4c3d..dccb0f3 100644
--- a/test/Instrumentation/AddressSanitizer/debug_info.ll
+++ b/test/Instrumentation/AddressSanitizer/debug_info.ll
@@ -37,7 +37,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !16, metadata !6, metadata !"zzz", metadata !"zzz", metadata !"_Z3zzzi", i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z3zzzi, null, null, metadata !1, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [zzz]
 !6 = metadata !{i32 786473, metadata !16} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9, metadata !9}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
 !10 = metadata !{i32 786689, metadata !5, metadata !"p", metadata !6, i32 16777217, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [p] [line 1]
diff --git a/test/Linker/DbgDeclare.ll b/test/Linker/DbgDeclare.ll
index 36d8ef3..d60aa5e 100644
--- a/test/Linker/DbgDeclare.ll
+++ b/test/Linker/DbgDeclare.ll
@@ -42,12 +42,12 @@ declare void @test(i32, i8**)
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !20, null, metadata !"main", metadata !"main", metadata !"", i32 3, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32, i8**)* @main, null, null, metadata !1, i32 4} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !20} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9, metadata !9, metadata !10}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
-!10 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
-!11 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !12} ; [ DW_TAG_pointer_type ]
-!12 = metadata !{i32 786470, null, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !13} ; [ DW_TAG_const_type ]
+!10 = metadata !{i32 786447, null, null, null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
+!11 = metadata !{i32 786447, null, null, null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !12} ; [ DW_TAG_pointer_type ]
+!12 = metadata !{i32 786470, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !13} ; [ DW_TAG_const_type ]
 !13 = metadata !{i32 786468, null, null, metadata !"char", i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ]
 !14 = metadata !{i32 786689, metadata !5, metadata !"argc", metadata !6, i32 16777219, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
 !15 = metadata !{i32 3, i32 0, metadata !5, null}
diff --git a/test/Linker/DbgDeclare2.ll b/test/Linker/DbgDeclare2.ll
index 6033de2..d13d79d 100644
--- a/test/Linker/DbgDeclare2.ll
+++ b/test/Linker/DbgDeclare2.ll
@@ -55,12 +55,12 @@ declare i32 @puts(i8*)
 !3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !26, null, metadata !"print_args", metadata !"print_args", metadata !"test", i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (i32, i8**)* @test, null, null, metadata !1, i32 5} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !26} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{null, metadata !9, metadata !10}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
-!10 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
-!11 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !12} ; [ DW_TAG_pointer_type ]
-!12 = metadata !{i32 786470, null, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !13} ; [ DW_TAG_const_type ]
+!10 = metadata !{i32 786447, null, null, null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
+!11 = metadata !{i32 786447, null, null, null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !12} ; [ DW_TAG_pointer_type ]
+!12 = metadata !{i32 786470, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !13} ; [ DW_TAG_const_type ]
 !13 = metadata !{i32 786468, null, null, metadata !"char", i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ]
 !14 = metadata !{i32 786689, metadata !5, metadata !"argc", metadata !6, i32 16777220, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
 !15 = metadata !{i32 4, i32 0, metadata !5, null}
diff --git a/test/Transforms/DeadArgElim/dbginfo.ll b/test/Transforms/DeadArgElim/dbginfo.ll
index d3bf67c..e3b8db9 100644
--- a/test/Transforms/DeadArgElim/dbginfo.ll
+++ b/test/Transforms/DeadArgElim/dbginfo.ll
@@ -41,7 +41,7 @@ entry:
 !3 = metadata !{metadata !5, metadata !8, metadata !9}
 !5 = metadata !{i32 786478, metadata !20, metadata !6, metadata !"run", metadata !"run", metadata !"", i32 8, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_Z3runv, null, null, metadata !1, i32 8} ; [ DW_TAG_subprogram ] [line 8] [def] [run]
 !6 = metadata !{i32 786473, metadata !20} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !1, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !1, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{i32 786478, metadata !20, metadata !6, metadata !"dead_vararg", metadata !"dead_vararg", metadata !"", i32 5, metadata !7, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (...)* @_ZN12_GLOBAL__N_111dead_varargEz, null, null, metadata !1, i32 5} ; [ DW_TAG_subprogram ] [line 5] [local] [def] [dead_vararg]
 
 ; CHECK: metadata !"dead_vararg"{{.*}}void ()* @_ZN12_GLOBAL__N_111dead_varargEz
diff --git a/test/Transforms/GCOVProfiling/linkagename.ll b/test/Transforms/GCOVProfiling/linkagename.ll
index 9453e1e..3059c82 100644
--- a/test/Transforms/GCOVProfiling/linkagename.ll
+++ b/test/Transforms/GCOVProfiling/linkagename.ll
@@ -20,7 +20,7 @@ entry:
 !3 = metadata !{i32 0}
 !4 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !1, metadata !1, metadata !"foo", metadata !"foo", metadata !"_Z3foov", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_Z3foov, null, null, metadata !3, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [foo]
-!6 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!6 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !7 = metadata !{null}
 !8 = metadata !{i32 1, i32 0, metadata !5, null}
 
diff --git a/test/Transforms/GCOVProfiling/version.ll b/test/Transforms/GCOVProfiling/version.ll
index a90290f..15bcb05 100644
--- a/test/Transforms/GCOVProfiling/version.ll
+++ b/test/Transforms/GCOVProfiling/version.ll
@@ -23,7 +23,7 @@ define void @test() {
 !4 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, metadata !10, metadata !6, metadata !"test", metadata !"test", metadata !"", i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @test, null, null, metadata !3, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [test]
 !6 = metadata !{i32 786473, metadata !10} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !3, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !3, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{i32 1, i32 0, metadata !5, null}
 ;; !9 is added through the echo line at the top.
 !10 = metadata !{metadata !"<stdin>", metadata !"."}
diff --git a/test/Transforms/GlobalOpt/2009-03-05-dbg.ll b/test/Transforms/GlobalOpt/2009-03-05-dbg.ll
index 2520e30..0108960 100644
--- a/test/Transforms/GlobalOpt/2009-03-05-dbg.ll
+++ b/test/Transforms/GlobalOpt/2009-03-05-dbg.ll
@@ -60,7 +60,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !2 = metadata !{i32 458788, null, metadata !1, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !3 = metadata !{i32 459009, metadata !4, metadata !"i", metadata !1, i32 4, metadata !2} ; [ DW_TAG_arg_variable ]
 !4 = metadata !{i32 458798, i32 0, metadata !1, metadata !"foo", metadata !"foo", metadata !"foo", i32 4, metadata !5, i1 false, i1 true, i32 0, i32 0, null, i32 0, i32 0, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ]
-!5 = metadata !{i32 458773, metadata !1, metadata !"", metadata !1, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!5 = metadata !{i32 458773, metadata !1, null, metadata !1, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !6 = metadata !{metadata !2, metadata !2}
 !7 = metadata !{i32 5, i32 0, metadata !8, null}
 !8 = metadata !{i32 458763, metadata !20, metadata !4, i32 0, i32 0, i32 0} ; [ DW_TAG_lexical_block ]
@@ -71,7 +71,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !13 = metadata !{i32 14, i32 0, metadata !14, null}
 !14 = metadata !{i32 458763, metadata !20, metadata !15, i32 0, i32 0, i32 0} ; [ DW_TAG_lexical_block ]
 !15 = metadata !{i32 458798, i32 0, metadata !1, metadata !"bar", metadata !"bar", metadata !"bar", i32 13, metadata !16, i1 false, i1 true, i32 0, i32 0, null, i32 0, i32 0, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ]
-!16 = metadata !{i32 458773, metadata !1, metadata !"", metadata !1, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !17, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!16 = metadata !{i32 458773, metadata !1, null, metadata !1, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !17, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !17 = metadata !{metadata !2}
 !18 = metadata !{i32 15, i32 0, metadata !14, null}
 !19 = metadata !{i32 16, i32 0, metadata !14, null}
diff --git a/test/Transforms/LoopVectorize/dbg.value.ll b/test/Transforms/LoopVectorize/dbg.value.ll
index ee7f928..e40cf64 100644
--- a/test/Transforms/LoopVectorize/dbg.value.ll
+++ b/test/Transforms/LoopVectorize/dbg.value.ll
@@ -48,7 +48,7 @@ attributes #1 = { nounwind readnone }
 !2 = metadata !{metadata !3}
 !3 = metadata !{i32 786478, metadata !25, metadata !4, metadata !"test", metadata !"test", metadata !"test", i32 5, metadata !5, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 ()* @test, null, null, metadata !8, i32 5}
 !4 = metadata !{i32 786473, metadata !25}
-!5 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!5 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !6 = metadata !{metadata !7}
 !7 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5}
 !8 = metadata !{metadata !9}
@@ -56,7 +56,7 @@ attributes #1 = { nounwind readnone }
 !10 = metadata !{i32 786443, metadata !25, metadata !3, i32 6, i32 0, i32 0}
 !11 = metadata !{metadata !12, metadata !16, metadata !17}
 !12 = metadata !{i32 786484, i32 0, null, metadata !"A", metadata !"A", metadata !"", metadata !4, i32 1, metadata !13, i32 0, i32 1, [1024 x i32]* @A, null}
-!13 = metadata !{i32 786433, null, metadata !"", null, i32 0, i64 32768, i64 32, i32 0, i32 0, metadata !7, metadata !14, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 32768, align 32, offset 0] [from int]
+!13 = metadata !{i32 786433, null, null, null, i32 0, i64 32768, i64 32, i32 0, i32 0, metadata !7, metadata !14, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 32768, align 32, offset 0] [from int]
 !14 = metadata !{metadata !15}
 !15 = metadata !{i32 786465, i64 0, i64 1024}
 !16 = metadata !{i32 786484, i32 0, null, metadata !"B", metadata !"B", metadata !"", metadata !4, i32 2, metadata !13, i32 0, i32 1, [1024 x i32]* @B, null}
diff --git a/test/Transforms/ObjCARC/ensure-that-exception-unwind-path-is-visited.ll b/test/Transforms/ObjCARC/ensure-that-exception-unwind-path-is-visited.ll
index bf5de51..09835a4 100644
--- a/test/Transforms/ObjCARC/ensure-that-exception-unwind-path-is-visited.ll
+++ b/test/Transforms/ObjCARC/ensure-that-exception-unwind-path-is-visited.ll
@@ -118,7 +118,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !3 = metadata !{metadata !5, metadata !27}
 !5 = metadata !{i32 786478, metadata !60, metadata !6, metadata !"main", metadata !"main", metadata !"", i32 9, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 true, i32 ()* @main, null, null, metadata !10, i32 10} ; [ DW_TAG_subprogram ] [line 9] [def] [scope 10] [main]
 !6 = metadata !{i32 786473, metadata !60} ; [ DW_TAG_file_type ]
-!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
 !10 = metadata !{metadata !11}
@@ -139,7 +139,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !25 = metadata !{i32 786688, metadata !26, metadata !"obj2", metadata !6, i32 15, metadata !14, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [obj2] [line 15]
 !26 = metadata !{i32 786443, metadata !60, metadata !22, i32 14, i32 0, i32 2} ; [ DW_TAG_lexical_block ] [/Volumes/Files/gottesmmcab/Radar/12906997/test.m]
 !27 = metadata !{i32 786478, metadata !60, metadata !6, metadata !"ThrowFunc", metadata !"ThrowFunc", metadata !"", i32 4, metadata !28, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 true, void (i8*)* @ThrowFunc, null, null, metadata !30, i32 5} ; [ DW_TAG_subprogram ] [line 4] [local] [def] [scope 5] [ThrowFunc]
-!28 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !29, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!28 = metadata !{i32 786453, i32 0, null, i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !29, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !29 = metadata !{null, metadata !14}
 !30 = metadata !{metadata !31}
 !31 = metadata !{metadata !32}