Remove the (apparently) unnecessary debug info metadata indirection.

The main lists of debug info metadata attached to the compile_unit had an extra
layer of metadata nodes they went through for no apparent reason. This patch
removes that (& still passes just as much of the GDB 7.5 test suite). If anyone
can show evidence as to why these extra metadata nodes are there I'm open to
reverting this patch & documenting why they're there.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174266 91177308-0d34-0410-b5e6-96231b3b80d8

33 files changed, 76 insertions, 152 deletions

diff --git a/test/DebugInfo/X86/2011-09-26-GlobalVarContext.ll b/test/DebugInfo/X86/2011-09-26-GlobalVarContext.ll
index dd77ab00de..d682ab2077 100644
--- a/test/DebugInfo/X86/2011-09-26-GlobalVarContext.ll
+++ b/test/DebugInfo/X86/2011-09-26-GlobalVarContext.ll
@@ -19,10 +19,8 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 720913, i32 0, i32 12, metadata !"test.c", metadata !"/work/llvm/vanilla/test/DebugInfo", metadata !"clang version 3.0 (trunk)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !12} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 720942, i32 0, metadata !6, metadata !"f", metadata !"f", metadata !"", metadata !6, i32 3, metadata !7, i1 false, i1 true, i32 0, i32 0, i32 0, i32 0, i1 false, i32 ()* @f, null, null, metadata !10} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 720937, metadata !"test.c", metadata !"/work/llvm/vanilla/test/DebugInfo", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
@@ -30,8 +28,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !9 = metadata !{i32 720932, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
 !10 = metadata !{metadata !11}
 !11 = metadata !{i32 720932}                      ; [ DW_TAG_base_type ]
-!12 = metadata !{metadata !13}
-!13 = metadata !{metadata !14}
+!12 = metadata !{metadata !14}
 !14 = metadata !{i32 720948, i32 0, null, metadata !"GLB", metadata !"GLB", metadata !"", metadata !6, i32 1, metadata !9, i32 0, i32 1, i32* @GLB} ; [ DW_TAG_variable ]
 !15 = metadata !{i32 721152, metadata !16, metadata !"LOC", metadata !6, i32 4, metadata !9, i32 0, i32 0} ; [ DW_TAG_auto_variable ]
 !16 = metadata !{i32 720907, metadata !5, i32 3, i32 9, metadata !6, i32 0} ; [ DW_TAG_lexical_block ]
diff --git a/test/DebugInfo/X86/2011-12-16-BadStructRef.ll b/test/DebugInfo/X86/2011-12-16-BadStructRef.ll
index 0f7e7374b1..ba8a763821 100644
--- a/test/DebugInfo/X86/2011-12-16-BadStructRef.ll
+++ b/test/DebugInfo/X86/2011-12-16-BadStructRef.ll
@@ -89,10 +89,8 @@ entry:
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 720913, i32 0, i32 4, metadata !"main.cpp", metadata !"/Users/echristo/tmp/bad-struct-ref", metadata !"clang version 3.1 (trunk 146596)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !3, metadata !27, metadata !1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5, metadata !9}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5, metadata !9}
 !5 = metadata !{i32 720898, null, metadata !"bar", metadata !6, i32 9, i64 128, i64 64, i32 0, i32 0, null, metadata !7, i32 0, null, null} ; [ DW_TAG_class_type ]
 !6 = metadata !{i32 720937, metadata !"main.cpp", metadata !"/Users/echristo/tmp/bad-struct-ref", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{metadata !8, metadata !19, metadata !21}
@@ -115,8 +113,7 @@ entry:
 !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 ]
 !25 = metadata !{metadata !26}
 !26 = metadata !{i32 720932}                      ; [ DW_TAG_base_type ]
-!27 = metadata !{metadata !28}
-!28 = metadata !{metadata !29, metadata !37, metadata !40, metadata !43, metadata !46}
+!27 = metadata !{metadata !29, metadata !37, metadata !40, metadata !43, metadata !46}
 !29 = metadata !{i32 720942, i32 0, metadata !6, metadata !"main", metadata !"main", metadata !"", metadata !6, i32 17, metadata !30, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 false, i32 (i32, i8**)* @main, null, null, metadata !35} ; [ DW_TAG_subprogram ]
 !30 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !31, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
 !31 = metadata !{metadata !12, metadata !12, metadata !32}
diff --git a/test/DebugInfo/X86/DW_AT_byte_size.ll b/test/DebugInfo/X86/DW_AT_byte_size.ll
index 1f83aaa995..ce3cf00731 100644
--- a/test/DebugInfo/X86/DW_AT_byte_size.ll
+++ b/test/DebugInfo/X86/DW_AT_byte_size.ll
@@ -25,10 +25,8 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/Users/echristo", metadata !"clang version 3.1 (trunk 150996)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"foo", metadata !"foo", metadata !"_Z3fooP1A", metadata !6, 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} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !"foo.cpp", metadata !"/Users/echristo", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ]
diff --git a/test/DebugInfo/X86/DW_AT_object_pointer.ll b/test/DebugInfo/X86/DW_AT_object_pointer.ll
index 550112fcd7..789fcebd0c 100644
--- a/test/DebugInfo/X86/DW_AT_object_pointer.ll
+++ b/test/DebugInfo/X86/DW_AT_object_pointer.ll
@@ -48,10 +48,8 @@ entry:
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"bar.cpp", metadata !"/Users/echristo/debug-tests", metadata !"clang version 3.2 (trunk 163586) (llvm/trunk 163570)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ] [/Users/echristo/debug-tests/bar.cpp] [DW_LANG_C_plus_plus]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5, metadata !10, metadata !20}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5, metadata !10, metadata !20}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"foo", metadata !"foo", metadata !"_Z3fooi", metadata !6, 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 !"bar.cpp", metadata !"/Users/echristo/debug-tests", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
diff --git a/test/DebugInfo/X86/DW_AT_specification.ll b/test/DebugInfo/X86/DW_AT_specification.ll
index de4fed7c13..67cfb47f52 100644
--- a/test/DebugInfo/X86/DW_AT_specification.ll
+++ b/test/DebugInfo/X86/DW_AT_specification.ll
@@ -17,10 +17,8 @@ entry:
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 720913, i32 0, i32 4, metadata !"<unknown>", metadata !"/Users/espindola/mozilla-central/obj-x86_64-apple-darwin11.2.0/toolkit/library", metadata !"clang version 3.0 ()", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !18} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 720942, i32 0, null, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEv", metadata !6, i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 false, void ()* @_ZN3foo3barEv, null, metadata !11, metadata !16} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 720937, metadata !"nsNativeAppSupportBase.ii", metadata !"/Users/espindola/mozilla-central/obj-x86_64-apple-darwin11.2.0/toolkit/library", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
@@ -34,8 +32,7 @@ entry:
 !15 = metadata !{i32 720932}                      ; [ DW_TAG_base_type ]
 !16 = metadata !{metadata !17}
 !17 = metadata !{i32 720932}                      ; [ DW_TAG_base_type ]
-!18 = metadata !{metadata !19}
-!19 = metadata !{metadata !20}
+!18 = metadata !{metadata !20}
 !20 = metadata !{i32 720948, i32 0, metadata !5, metadata !"x", metadata !"x", metadata !"", metadata !6, i32 5, metadata !21, i32 1, i32 1, i32* @_ZZN3foo3barEvE1x} ; [ DW_TAG_variable ]
 !21 = metadata !{i32 720934, null, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !22} ; [ DW_TAG_const_type ]
 !22 = metadata !{i32 720932, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
diff --git a/test/DebugInfo/X86/DW_TAG_friend.ll b/test/DebugInfo/X86/DW_TAG_friend.ll
index efbb23e457..0671a40074 100644
--- a/test/DebugInfo/X86/DW_TAG_friend.ll
+++ b/test/DebugInfo/X86/DW_TAG_friend.ll
@@ -18,10 +18,8 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", metadata !"clang version 3.1 (trunk 153413) (llvm/trunk 153428)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5, metadata !17}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5, metadata !17}
 !5 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 10, metadata !7, i32 0, i32 1, %class.A* @a} ; [ DW_TAG_variable ]
 !6 = metadata !{i32 786473, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 786434, null, metadata !"A", metadata !6, i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !8, i32 0, null, null} ; [ DW_TAG_class_type ]
diff --git a/test/DebugInfo/X86/aligned_stack_var.ll b/test/DebugInfo/X86/aligned_stack_var.ll
index f3a15fe401..85027aa72f 100644
--- a/test/DebugInfo/X86/aligned_stack_var.ll
+++ b/test/DebugInfo/X86/aligned_stack_var.ll
@@ -27,10 +27,8 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"test.cc", metadata !"/home/samsonov/debuginfo", metadata !"clang version 3.2 (trunk 155696:155697) (llvm/trunk 155696)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"run", metadata !"run", metadata !"_Z3runv", metadata !6, 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 !"test.cc", metadata !"/home/samsonov/debuginfo", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ]
diff --git a/test/DebugInfo/X86/block-capture.ll b/test/DebugInfo/X86/block-capture.ll
index b25223f274..a1ff6ace8d 100644
--- a/test/DebugInfo/X86/block-capture.ll
+++ b/test/DebugInfo/X86/block-capture.ll
@@ -63,10 +63,8 @@ declare i32 @__objc_personality_v0(...)
 !llvm.module.flags = !{!35, !36, !37, !38}
 
 !0 = metadata !{i32 786449, i32 0, i32 16, metadata !"foo.m", metadata !"/Users/echristo", metadata !"clang version 3.1 (trunk 151227)", i1 true, i1 false, metadata !"", i32 2, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5, metadata !28, metadata !31, metadata !34}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5, metadata !28, metadata !31, metadata !34}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"foo", metadata !"foo", metadata !"", metadata !6, i32 5, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, null, null, null, metadata !26} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !"foo.m", metadata !"/Users/echristo", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ]
diff --git a/test/DebugInfo/X86/concrete_out_of_line.ll b/test/DebugInfo/X86/concrete_out_of_line.ll
index f6cdecb5aa..19bb152671 100644
--- a/test/DebugInfo/X86/concrete_out_of_line.ll
+++ b/test/DebugInfo/X86/concrete_out_of_line.ll
@@ -35,10 +35,8 @@ declare void @_Z8moz_freePv(i8*)
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 720913, i32 0, i32 4, metadata !"nsAutoRefCnt.cpp", metadata !"/Users/espindola/mozilla-central/obj-x86_64-apple-darwin11.2.0/netwerk/base/src", metadata !"clang version 3.1 ()", i1 true, i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !47} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5, metadata !23, metadata !27, metadata !31}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5, metadata !23, metadata !27, metadata !31}
 !5 = metadata !{i32 720942, i32 0, null, metadata !"Release", metadata !"Release", metadata !"_ZN17nsAutoRefCnt7ReleaseEv", metadata !6, i32 14, metadata !7, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 true, i32* null, null, metadata !12, metadata !20} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 720937, metadata !"nsAutoRefCnt.ii", metadata !"/Users/espindola/mozilla-central/obj-x86_64-apple-darwin11.2.0/netwerk/base/src", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
@@ -81,8 +79,7 @@ declare void @_Z8moz_freePv(i8*)
 !44 = metadata !{metadata !45, metadata !46}
 !45 = metadata !{i32 721153, metadata !31, metadata !"this", metadata !6, i32 16777220, metadata !34, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
 !46 = metadata !{i32 721153, metadata !31, metadata !"aValue", metadata !6, i32 33554436, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
-!47 = metadata !{metadata !48}
-!48 = metadata !{metadata !49}
+!47 = metadata !{metadata !49}
 !49 = metadata !{i32 720948, i32 0, null, metadata !"mRefCnt", metadata !"mRefCnt", metadata !"", metadata !6, i32 9, metadata !37, i32 0, i32 1, i32* null} ; [ DW_TAG_variable ]
 !50 = metadata !{i32 5, i32 5, metadata !51, metadata !52}
 !51 = metadata !{i32 720907, metadata !31, i32 4, i32 29, metadata !6, i32 2} ; [ DW_TAG_lexical_block ]
diff --git a/test/DebugInfo/X86/debug-info-static-member.ll b/test/DebugInfo/X86/debug-info-static-member.ll
index 07a54e4f1a..d7a6578ff7 100644
--- a/test/DebugInfo/X86/debug-info-static-member.ll
+++ b/test/DebugInfo/X86/debug-info-static-member.ll
@@ -56,17 +56,14 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"debug-info-static-member.cpp", metadata !"/home/probinson/projects/upstream/static-member/test", metadata !"clang version 3.3 (trunk 171914)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !10} ; [ DW_TAG_compile_unit ] [/home/probinson/projects/upstream/static-member/test/debug-info-static-member.cpp] [DW_LANG_C_plus_plus]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"main", metadata !"main", metadata !"", metadata !6, 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 !"/usr/local/google/home/blaikie/Development/llvm/src/tools/clang/test/CodeGenCXX/debug-info-static-member.cpp", metadata !"/home/blaikie/local/Development/llvm/build/clang/x86-64/Debug/llvm", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
 !8 = metadata !{metadata !9}
 !9 = metadata !{i32 786468, null, metadata !"int", null, 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}
-!11 = metadata !{metadata !12, metadata !27, metadata !28}
+!10 = metadata !{metadata !12, metadata !27, metadata !28}
 !12 = metadata !{i32 786484, i32 0, metadata !13, metadata !"a", metadata !"a", metadata !"_ZN1C1aE", metadata !6, i32 14, metadata !9, i32 0, i32 1, i32* @_ZN1C1aE, metadata !15} ; [ DW_TAG_variable ] [a] [line 14] [def]
 !13 = metadata !{i32 786434, null, metadata !"C", metadata !6, i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !14, i32 0, null, null} ; [ DW_TAG_class_type ] [C] [line 1, size 32, align 32, offset 0] [from ]
 !14 = metadata !{metadata !15, metadata !16, metadata !19, metadata !20, metadata !23, metadata !24, metadata !26}
diff --git a/test/DebugInfo/X86/elf-names.ll b/test/DebugInfo/X86/elf-names.ll
index 71e1f5fe13..f4df0b7d15 100644
--- a/test/DebugInfo/X86/elf-names.ll
+++ b/test/DebugInfo/X86/elf-names.ll
@@ -59,10 +59,8 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/usr/local/google/home/echristo", metadata !"clang version 3.2 (trunk 167506) (llvm/trunk 167505)", i1 true, i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/echristo/foo.cpp] [DW_LANG_C_plus_plus]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5, metadata !31}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5, metadata !31}
 !5 = metadata !{i32 786478, i32 0, null, metadata !"D", metadata !"D", metadata !"_ZN1DC2Ev", metadata !6, 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 !"foo.cpp", metadata !"/usr/local/google/home/echristo", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
diff --git a/test/DebugInfo/X86/empty-and-one-elem-array.ll b/test/DebugInfo/X86/empty-and-one-elem-array.ll
index 12f26f165d..c3bdbc4c55 100644
--- a/test/DebugInfo/X86/empty-and-one-elem-array.ll
+++ b/test/DebugInfo/X86/empty-and-one-elem-array.ll
@@ -60,10 +60,8 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 12, metadata !"test.c", metadata !"/Volumes/Sandbox/llvm", metadata !"clang version 3.3 (trunk 169136)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ] [/Volumes/Sandbox/llvm/test.c] [DW_LANG_C99]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"func", metadata !"func", metadata !"", metadata !6, 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 !"test.c", metadata !"/Volumes/Sandbox/llvm", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
diff --git a/test/DebugInfo/X86/empty-array.ll b/test/DebugInfo/X86/empty-array.ll
index c33de1c49b..b4621fb2b8 100644
--- a/test/DebugInfo/X86/empty-array.ll
+++ b/test/DebugInfo/X86/empty-array.ll
@@ -25,10 +25,8 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"t.cpp", metadata !"/Volumes/Sandbox/llvm", metadata !"clang version 3.3 (trunk 169136)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ] [/Volumes/Sandbox/llvm/t.cpp] [DW_LANG_C_plus_plus]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, %class.A* @a} ; [ DW_TAG_variable ] [a] [line 1] [def]
 !6 = metadata !{i32 786473, metadata !"t.cpp", metadata !"/Volumes/Sandbox/llvm", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 786434, null, metadata !"A", metadata !6, i32 1, i64 0, i64 32, i32 0, i32 0, null, metadata !8, i32 0, null, null} ; [ DW_TAG_class_type ] [A] [line 1, size 0, align 32, offset 0] [from ]
diff --git a/test/DebugInfo/X86/ending-run.ll b/test/DebugInfo/X86/ending-run.ll
index bf0db560e7..3813e1f3fc 100644
--- a/test/DebugInfo/X86/ending-run.ll
+++ b/test/DebugInfo/X86/ending-run.ll
@@ -29,10 +29,8 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 12, metadata !"ending-run.c", metadata !"/Users/echristo/tmp", metadata !"clang version 3.1 (trunk 153921) (llvm/trunk 153916)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"callee", metadata !"callee", metadata !"", metadata !6, 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 !"ending-run.c", metadata !"/Users/echristo/tmp", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ]
diff --git a/test/DebugInfo/X86/enum-class.ll b/test/DebugInfo/X86/enum-class.ll
index 779f5a7812..d129603b44 100644
--- a/test/DebugInfo/X86/enum-class.ll
+++ b/test/DebugInfo/X86/enum-class.ll
@@ -8,8 +8,7 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", metadata !"clang version 3.2 (trunk 157269) (llvm/trunk 157264)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !15, metadata !15, metadata !17} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{metadata !3, metadata !8, metadata !12}
+!1 = metadata !{metadata !3, metadata !8, metadata !12}
 !3 = metadata !{i32 786436, null, metadata !"A", metadata !4, i32 1, i64 32, i64 32, i32 0, i32 0, metadata !5, metadata !6, i32 0, i32 0} ; [ DW_TAG_enumeration_type ]
 !4 = metadata !{i32 786473, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", null} ; [ DW_TAG_file_type ]
 !5 = metadata !{i32 786468, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
@@ -22,10 +21,8 @@
 !12 = metadata !{i32 786436, null, metadata !"C", metadata !4, i32 3, i64 32, i64 32, i32 0, i32 0, null, metadata !13, i32 0, i32 0} ; [ DW_TAG_enumeration_type ]
 !13 = metadata !{metadata !14}
 !14 = metadata !{i32 786472, metadata !"C1", i64 1} ; [ DW_TAG_enumerator ]
-!15 = metadata !{metadata !16}
-!16 = metadata !{i32 0}
-!17 = metadata !{metadata !18}
-!18 = metadata !{metadata !19, metadata !20, metadata !21}
+!15 = metadata !{i32 0}
+!17 = metadata !{metadata !19, metadata !20, metadata !21}
 !19 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !4, i32 4, metadata !3, i32 0, i32 1, i32* @a} ; [ DW_TAG_variable ]
 !20 = metadata !{i32 786484, i32 0, null, metadata !"b", metadata !"b", metadata !"", metadata !4, i32 5, metadata !8, i32 0, i32 1, i64* @b} ; [ DW_TAG_variable ]
 !21 = metadata !{i32 786484, i32 0, null, metadata !"c", metadata !"c", metadata !"", metadata !4, i32 6, metadata !12, i32 0, i32 1, i32* @c} ; [ DW_TAG_variable ]
diff --git a/test/DebugInfo/X86/enum-fwd-decl.ll b/test/DebugInfo/X86/enum-fwd-decl.ll
index 6d85c24a6d..04ac8e4fd7 100644
--- a/test/DebugInfo/X86/enum-fwd-decl.ll
+++ b/test/DebugInfo/X86/enum-fwd-decl.ll
@@ -6,10 +6,8 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/tmp", metadata !"clang version 3.2 (trunk 165274) (llvm/trunk 165272)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ] [/tmp/foo.cpp] [DW_LANG_C_plus_plus]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786484, i32 0, null, metadata !"e", metadata !"e", metadata !"", metadata !6, i32 2, metadata !7, i32 0, i32 1, i16* @e} ; [ DW_TAG_variable ] [e] [line 2] [def]
 !6 = metadata !{i32 786473, metadata !"foo.cpp", metadata !"/tmp", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 786436, null, metadata !"E", metadata !6, i32 1, i64 16, i64 16, i32 0, i32 4, null, null, i32 0} ; [ DW_TAG_enumeration_type ] [E] [line 1, size 16, align 16, offset 0] [fwd] [from ]
diff --git a/test/DebugInfo/X86/fission-cu.ll b/test/DebugInfo/X86/fission-cu.ll
index e8855e1eb7..853eb6c727 100644
--- a/test/DebugInfo/X86/fission-cu.ll
+++ b/test/DebugInfo/X86/fission-cu.ll
@@ -6,10 +6,8 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 12, metadata !"baz.c", metadata !"/usr/local/google/home/echristo/tmp", metadata !"clang version 3.3 (trunk 169021) (llvm/trunk 169020)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/echristo/tmp/baz.c] [DW_LANG_C99]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, i32* @a} ; [ DW_TAG_variable ] [a] [line 1] [def]
 !6 = metadata !{i32 786473, metadata !"baz.c", metadata !"/usr/local/google/home/echristo/tmp", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 786468, null, metadata !"int", null, 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/linkage-name.ll b/test/DebugInfo/X86/linkage-name.ll
index bb71286492..a3c2a9b452 100644
--- a/test/DebugInfo/X86/linkage-name.ll
+++ b/test/DebugInfo/X86/linkage-name.ll
@@ -27,10 +27,8 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/Users/echristo", metadata !"clang version 3.1 (trunk 152691) (llvm/trunk 152692)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !18} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, null, metadata !"a", metadata !"a", metadata !"_ZN1A1aEi", metadata !6, 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} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !"foo.cpp", metadata !"/Users/echristo", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ]
@@ -44,8 +42,7 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !15 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
 !16 = metadata !{metadata !17}
 !17 = metadata !{i32 786468}                      ; [ DW_TAG_base_type ]
-!18 = metadata !{metadata !19}
-!19 = metadata !{metadata !20}
+!18 = metadata !{metadata !20}
 !20 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 9, metadata !11, i32 0, i32 1, %class.A* @a} ; [ DW_TAG_variable ]
 !21 = metadata !{i32 786689, metadata !5, metadata !"this", metadata !6, i32 16777221, metadata !22, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
 !22 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
diff --git a/test/DebugInfo/X86/low-pc-cu.ll b/test/DebugInfo/X86/low-pc-cu.ll
index fece3a6e76..2240f362f7 100644
--- a/test/DebugInfo/X86/low-pc-cu.ll
+++ b/test/DebugInfo/X86/low-pc-cu.ll
@@ -15,10 +15,8 @@ entry:
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", metadata !"clang version 3.1 (trunk 153454) (llvm/trunk 153471)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5, metadata !12}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5, metadata !12}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"q", metadata !"q", metadata !"_Z1qv", metadata !6, i32 5, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @_Z1qv, null, null, metadata !10} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ]
diff --git a/test/DebugInfo/X86/multiple-at-const-val.ll b/test/DebugInfo/X86/multiple-at-const-val.ll
index 59d9382fd7..5f3e0d9b67 100644
--- a/test/DebugInfo/X86/multiple-at-const-val.ll
+++ b/test/DebugInfo/X86/multiple-at-const-val.ll
@@ -32,8 +32,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"student2.cpp", metadata !"/privite/tmp", metadata !"clang version 3.3 (trunk 174207)", i1 true, i1 true, metadata !"", i32 0, metadata !1, metadata !955, metadata !956, metadata !1786} ; [ DW_TAG_compile_unit ] [/privite/tmp/student2.cpp] [DW_LANG_C_plus_plus]
-!1 = metadata !{metadata !2}
-!2 = metadata !{metadata !26}
+!1 = metadata !{metadata !26}
 !4 = metadata !{i32 786489, null, metadata !"std", metadata !5, i32 48} ; [ DW_TAG_namespace ]
 !5 = metadata !{i32 786473, metadata !"os_base.h", metadata !"/privite/tmp", null} ; [ DW_TAG_file_type ]
 !25 = metadata !{i32 786472, metadata !"_S_os_fmtflags_end", i64 65536} ; [ DW_TAG_enumerator ]
@@ -52,12 +51,9 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
 !77 = metadata !{i32 786445, metadata !49, metadata !"badbit", metadata !5, i32 331, i64 0, i64 0, i64 0, i32 4096, metadata !78, i32 1} ; [ DW_TAG_member ]
 !78 = metadata !{i32 786470, null, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !79} ; [ DW_TAG_const_type ]
 !79 = metadata !{i32 786454, metadata !49, metadata !"ostate", metadata !5, i32 327, i64 0, i64 0, i64 0, i32 0, metadata !26} ; [ DW_TAG_typedef ]
-!468 = metadata !{i32 0}
-!955 = metadata !{metadata !468}
-!956 = metadata !{metadata !957}
-!957 = metadata !{metadata !960}
+!955 = metadata !{i32 0}
+!956 = metadata !{metadata !960}
 !960 = metadata !{i32 786478, i32 0, metadata !961, metadata !"main", metadata !"main", metadata !"", metadata !961, i32 73, metadata !54, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 ()* @main, null, null, metadata !955, i32 73} ; [ DW_TAG_subprogram ]
 !961 = metadata !{i32 786473, metadata !"student2.cpp", metadata !"/privite/tmp", null} ; [ DW_TAG_file_type ]
-!1786 = metadata !{metadata !1787}
-!1787 = metadata !{metadata !1800}
+!1786 = metadata !{metadata !1800}
 !1800 = metadata !{i32 786484, i32 0, metadata !5, metadata !"badbit", metadata !"badbit", metadata !"badbit", metadata !5, i32 331, metadata !78, i32 1, i32 1, i32 1, metadata !77} ; [ DW_TAG_variable ]
diff --git a/test/DebugInfo/X86/nondefault-subrange-array.ll b/test/DebugInfo/X86/nondefault-subrange-array.ll
index e3601abff5..fcc29122ef 100644
--- a/test/DebugInfo/X86/nondefault-subrange-array.ll
+++ b/test/DebugInfo/X86/nondefault-subrange-array.ll
@@ -28,10 +28,8 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"t.cpp", metadata !"/Volumes/Sandbox/llvm", metadata !"clang version 3.3 (trunk 169136)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ] [/Volumes/Sandbox/llvm/t.cpp] [DW_LANG_C_plus_plus]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, %class.A* @a} ; [ DW_TAG_variable ] [a] [line 1] [def]
 !6 = metadata !{i32 786473, metadata !"t.cpp", metadata !"/Volumes/Sandbox/llvm", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 786434, null, metadata !"A", metadata !6, i32 1, i64 0, i64 32, i32 0, i32 0, null, metadata !8, i32 0, null, null} ; [ DW_TAG_class_type ] [A] [line 1, size 0, align 32, offset 0] [from ]
diff --git a/test/DebugInfo/X86/objc-fwd-decl.ll b/test/DebugInfo/X86/objc-fwd-decl.ll
index 9bbea91a6c..eead9e1ff2 100644
--- a/test/DebugInfo/X86/objc-fwd-decl.ll
+++ b/test/DebugInfo/X86/objc-fwd-decl.ll
@@ -13,10 +13,8 @@
 !llvm.module.flags = !{!9, !10, !11, !12}
 
 !0 = metadata !{i32 786449, i32 0, i32 16, metadata !"foo.m", metadata !"/Users/echristo", metadata !"clang version 3.1 (trunk 152054 trunk 152094)", i1 true, i1 false, metadata !"", i32 2, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 3, metadata !7, i32 0, i32 1, %0** @a} ; [ DW_TAG_variable ]
 !6 = metadata !{i32 786473, metadata !"foo.m", metadata !"/Users/echristo", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !8} ; [ DW_TAG_pointer_type ]
diff --git a/test/DebugInfo/X86/op_deref.ll b/test/DebugInfo/X86/op_deref.ll
index 66acc15f61..13efe21297 100644
--- a/test/DebugInfo/X86/op_deref.ll
+++ b/test/DebugInfo/X86/op_deref.ll
@@ -60,10 +60,8 @@ declare void @llvm.stackrestore(i8*) nounwind
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 12, metadata !"bar.c", metadata !"/Users/echristo/tmp", metadata !"clang version 3.2 (trunk 156005) (llvm/trunk 156000)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"testVLAwithSize", metadata !"testVLAwithSize", metadata !"", metadata !6, 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 !"bar.c", metadata !"/Users/echristo/tmp", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ]
diff --git a/test/DebugInfo/X86/pointer-type-size.ll b/test/DebugInfo/X86/pointer-type-size.ll
index e346a4fcb2..8e203c9790 100644
--- a/test/DebugInfo/X86/pointer-type-size.ll
+++ b/test/DebugInfo/X86/pointer-type-size.ll
@@ -11,10 +11,8 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 720913, i32 0, i32 12, metadata !"foo.c", metadata !"/Users/echristo/tmp", metadata !"clang version 3.1 (trunk 147882)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 720948, i32 0, null, metadata !"crass", metadata !"crass", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, %struct.crass* @crass} ; [ DW_TAG_variable ]
 !6 = metadata !{i32 720937, metadata !"foo.c", metadata !"/Users/echristo/tmp", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 720915, null, metadata !"crass", metadata !6, i32 1, i64 64, i64 64, i32 0, i32 0, null, metadata !8, i32 0, i32 0} ; [ DW_TAG_structure_type ]
diff --git a/test/DebugInfo/X86/pr11300.ll b/test/DebugInfo/X86/pr11300.ll
index 03a761437a..b0c8f3786f 100644
--- a/test/DebugInfo/X86/pr11300.ll
+++ b/test/DebugInfo/X86/pr11300.ll
@@ -32,10 +32,8 @@ entry:
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 720913, i32 0, i32 4, metadata !"/home/espindola/llvm/test.cc", metadata !"/home/espindola/tmpfs/build", metadata !"clang version 3.0 ()", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5, metadata !20}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5, metadata !20}
 !5 = metadata !{i32 720942, i32 0, metadata !6, metadata !"zed", metadata !"zed", metadata !"_Z3zedP3foo", metadata !6, i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 false, void (%struct.foo*)* @_Z3zedP3foo, null, null, metadata !18} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 720937, metadata !"/home/espindola/llvm/test.cc", metadata !"/home/espindola/tmpfs/build", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
diff --git a/test/DebugInfo/X86/pr12831.ll b/test/DebugInfo/X86/pr12831.ll
index abb946d514..3970583cbe 100644
--- a/test/DebugInfo/X86/pr12831.ll
+++ b/test/DebugInfo/X86/pr12831.ll
@@ -78,10 +78,8 @@ entry:
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"BPLFunctionWriter.cpp", metadata !"/home/peter/crashdelta", metadata !"clang version 3.2 ", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !128} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5, metadata !106, metadata !107, metadata !126, metadata !127}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5, metadata !106, metadata !107, metadata !126, metadata !127}
 !5 = metadata !{i32 786478, i32 0, null, metadata !"writeExpr", metadata !"writeExpr", metadata !"_ZN17BPLFunctionWriter9writeExprEv", metadata !6, 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 !"BPLFunctionWriter2.ii", metadata !"/home/peter/crashdelta", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ]
@@ -205,8 +203,7 @@ entry:
 !125 = metadata !{i32 786468}                     ; [ DW_TAG_base_type ]
 !126 = metadata !{i32 786478, i32 0, null, metadata !"function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:20:36> >", metadata !"function<BPLFunctionWriter::<lambda at BPLFunctionWriter2.ii:20:36> >", metadata !"_ZN8functionIFvvEEC2IZN17BPLFunctionWriter9writeExprEvE3$_0EET_", metadata !6, i32 8, metadata !23, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.function*)* @"_ZN8functionIFvvEEC2IZN17BPLFunctionWriter9writeExprEvE3$_0EET_", metadata !47, metadata !22, metadata !1, i32 8} ; [ DW_TAG_subprogram ]
 !127 = metadata !{i32 786478, i32 0, null, 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$_0EEvRKT_", metadata !6, i32 3, metadata !117, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.anon*)* @"_ZN13_Base_manager21_M_not_empty_functionIZN17BPLFunctionWriter9writeExprEvE3$_0EEvRKT_", metadata !120, metadata !116, metadata !1, i32 3} ; [ DW_TAG_subprogram ]
-!128 = metadata !{metadata !129}
-!129 = metadata !{metadata !130}
+!128 = metadata !{metadata !130}
 !130 = metadata !{i32 786484, i32 0, metadata !114, metadata !"__stored_locally", metadata !"__stored_locally", metadata !"__stored_locally", metadata !6, i32 2, metadata !131, i32 1, i32 1, i1 true} ; [ DW_TAG_variable ]
 !131 = metadata !{i32 786470, null, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !132} ; [ DW_TAG_const_type ]
 !132 = metadata !{i32 786468, null, metadata !"bool", null, i32 0, i64 8, i64 8, i64 0, i32 0, i32 2} ; [ DW_TAG_base_type ]
diff --git a/test/DebugInfo/X86/pr13303.ll b/test/DebugInfo/X86/pr13303.ll
index 464a1dc218..a72bc9b9f5 100644
--- a/test/DebugInfo/X86/pr13303.ll
+++ b/test/DebugInfo/X86/pr13303.ll
@@ -15,10 +15,8 @@ entry:
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 12, metadata !"PR13303.c", metadata !"/home/probinson", metadata !"clang version 3.2 (trunk 160143)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ] [/home/probinson/PR13303.c] [DW_LANG_C99]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"main", metadata !"main", metadata !"", metadata !6, i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 false, i32 ()* @main, null, null, metadata !1, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [main]
 !6 = metadata !{i32 786473, metadata !"PR13303.c", metadata !"/home/probinson", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
diff --git a/test/DebugInfo/X86/prologue-stack.ll b/test/DebugInfo/X86/prologue-stack.ll
index 929db51902..0651e593b0 100644
--- a/test/DebugInfo/X86/prologue-stack.ll
+++ b/test/DebugInfo/X86/prologue-stack.ll
@@ -21,10 +21,8 @@ declare i32 @callme(i32)
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 12, metadata !"bar.c", metadata !"/usr/local/google/home/echristo/tmp", metadata !"clang version 3.2 (trunk 164980) (llvm/trunk 164979)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/echristo/tmp/bar.c] [DW_LANG_C99]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"isel_line_test2", metadata !"isel_line_test2", metadata !"", metadata !6, i32 3, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 false, i32 ()* @isel_line_test2, null, null, metadata !1, i32 4} ; [ DW_TAG_subprogram ] [line 3] [def] [scope 4] [isel_line_test2]
 !6 = metadata !{i32 786473, metadata !"bar.c", metadata !"/usr/local/google/home/echristo/tmp", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
diff --git a/test/DebugInfo/X86/rvalue-ref.ll b/test/DebugInfo/X86/rvalue-ref.ll
index ce42b6e372..136db0e428 100644
--- a/test/DebugInfo/X86/rvalue-ref.ll
+++ b/test/DebugInfo/X86/rvalue-ref.ll
@@ -23,10 +23,8 @@ declare i32 @printf(i8*, ...)
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", metadata !"clang version 3.2 (trunk 157054) (llvm/trunk 157060)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"foo", metadata !"foo", metadata !"_Z3fooOi", metadata !6, i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (i32*)* @_Z3fooOi, null, null, metadata !1, i32 5} ; [ DW_TAG_subprogram ]
 !6 = metadata !{i32 786473, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ]
diff --git a/test/DebugInfo/X86/stringpool.ll b/test/DebugInfo/X86/stringpool.ll
index 21b0d09a86..1e08d546e2 100644
--- a/test/DebugInfo/X86/stringpool.ll
+++ b/test/DebugInfo/X86/stringpool.ll
@@ -6,10 +6,8 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 720913, i32 0, i32 12, metadata !"z.c", metadata !"/home/nicholas", metadata !"clang version 3.1 (trunk 143009)", i1 true, i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 720948, i32 0, null, metadata !"yyyy", metadata !"yyyy", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, i32* @yyyy} ; [ DW_TAG_variable ]
 !6 = metadata !{i32 720937, metadata !"z.c", metadata !"/home/nicholas", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 720932, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
diff --git a/test/DebugInfo/X86/struct-loc.ll b/test/DebugInfo/X86/struct-loc.ll
index 87a7eca2a3..485aa61781 100644
--- a/test/DebugInfo/X86/struct-loc.ll
+++ b/test/DebugInfo/X86/struct-loc.ll
@@ -14,10 +14,8 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 12, metadata !"struct_bug.c", metadata !"/Users/echristo/tmp", metadata !"clang version 3.1 (trunk 152837) (llvm/trunk 152845)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786484, i32 0, null, metadata !"f", metadata !"f", metadata !"", metadata !6, i32 5, metadata !7, i32 0, i32 1, %struct.foo* @f} ; [ DW_TAG_variable ]
 !6 = metadata !{i32 786473, metadata !"struct_bug.c", metadata !"/Users/echristo/tmp", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 786451, null, metadata !"foo", metadata !6, i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !8, i32 0, i32 0} ; [ DW_TAG_structure_type ]
diff --git a/test/DebugInfo/X86/subrange-type.ll b/test/DebugInfo/X86/subrange-type.ll
index e40aa5ea8e..e9d3e77061 100644
--- a/test/DebugInfo/X86/subrange-type.ll
+++ b/test/DebugInfo/X86/subrange-type.ll
@@ -21,10 +21,8 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 12, metadata !"foo.c", metadata !"/usr/local/google/home/echristo/tmp", metadata !"clang version 3.3 (trunk 171472) (llvm/trunk 171487)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/echristo/tmp/foo.c] [DW_LANG_C99]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"main", metadata !"main", metadata !"", metadata !6, 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 !"foo.c", metadata !"/usr/local/google/home/echristo/tmp", null} ; [ 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, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
diff --git a/test/DebugInfo/X86/vector.ll b/test/DebugInfo/X86/vector.ll
index 6fe2ef132f..0ff99ccbd9 100644
--- a/test/DebugInfo/X86/vector.ll
+++ b/test/DebugInfo/X86/vector.ll
@@ -12,10 +12,8 @@
 !llvm.dbg.cu = !{!0}
 
 !0 = metadata !{i32 786449, i32 0, i32 12, metadata !"foo.c", metadata !"/Users/echristo", metadata !"clang version 3.3 (trunk 171825) (llvm/trunk 171822)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ] [/Users/echristo/foo.c] [DW_LANG_C99]
-!1 = metadata !{metadata !2}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !5}
+!1 = metadata !{i32 0}
+!3 = metadata !{metadata !5}
 !5 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 3, metadata !7, i32 0, i32 1, <4 x i32>* @a} ; [ DW_TAG_variable ] [a] [line 3] [def]
 !6 = metadata !{i32 786473, metadata !"foo.c", metadata !"/Users/echristo", null} ; [ DW_TAG_file_type ]
 !7 = metadata !{i32 786454, null, metadata !"v4si", metadata !6, i32 1, i64 0, i64 0, i64 0, i32 0, metadata !8} ; [ DW_TAG_typedef ] [v4si] [line 1, size 0, align 0, offset 0] [from ]