diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -1267,8 +1267,9 @@
   if (GetDebugMapSymfile())
     return GetID() | ref.die_offset();
 
-  return user_id_t(GetDwoNum().getValueOr(0x7fffffff)) << 32 |
-         ref.die_offset() |
+  lldbassert(GetDwoNum().getValueOr(0) <= 0x3fffffff);
+  return user_id_t(GetDwoNum().getValueOr(0)) << 32 | ref.die_offset() |
+         lldb::user_id_t(GetDwoNum().hasValue()) << 62 |
          lldb::user_id_t(ref.section() == DIERef::Section::DebugTypes) << 63;
 }
 
@@ -1297,9 +1298,10 @@
   DIERef::Section section =
       uid >> 63 ? DIERef::Section::DebugTypes : DIERef::Section::DebugInfo;
 
-  llvm::Optional<uint32_t> dwo_num = uid >> 32 & 0x7fffffff;
-  if (*dwo_num == 0x7fffffff)
-    dwo_num = llvm::None;
+  llvm::Optional<uint32_t> dwo_num;
+  bool dwo_valid = uid >> 62 & 1;
+  if (dwo_valid)
+    dwo_num = uid >> 32 & 0x3fffffff;
 
   return DecodedUID{*this, {dwo_num, section, die_offset}};
 }
diff --git a/lldb/test/Shell/SymbolFile/DWARF/DW_AT_low_pc-addrx.s b/lldb/test/Shell/SymbolFile/DWARF/DW_AT_low_pc-addrx.s
--- a/lldb/test/Shell/SymbolFile/DWARF/DW_AT_low_pc-addrx.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/DW_AT_low_pc-addrx.s
@@ -5,9 +5,9 @@
 # RUN:   -o exit | FileCheck %s
 
 # CHECK-LABEL: image lookup -v -s lookup_rnglists
-# CHECK:  Function: id = {0x7fffffff0000002d}, name = "rnglists", range = [0x0000000000000000-0x0000000000000003)
-# CHECK:    Blocks: id = {0x7fffffff0000002d}, range = [0x00000000-0x00000003)
-# CHECK-NEXT:       id = {0x7fffffff00000043}, range = [0x00000001-0x00000002)
+# CHECK:  Function: id = {0x0000002d}, name = "rnglists", range = [0x0000000000000000-0x0000000000000003)
+# CHECK:    Blocks: id = {0x0000002d}, range = [0x00000000-0x00000003)
+# CHECK-NEXT:       id = {0x00000043}, range = [0x00000001-0x00000002)
 
         .text
 rnglists:
diff --git a/lldb/test/Shell/SymbolFile/DWARF/array-sizes.s b/lldb/test/Shell/SymbolFile/DWARF/array-sizes.s
--- a/lldb/test/Shell/SymbolFile/DWARF/array-sizes.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/array-sizes.s
@@ -9,8 +9,8 @@
 # RUN: ld.lld %t.o -o %t
 # RUN: lldb-test symbols %t | FileCheck %s
 
-# CHECK: Variable{0x7fffffff0000001e}, name = "X"
-# CHECK-SAME: type = {7fffffff00000033} 0x{{[0-9A-F]*}} (char [56])
+# CHECK: Variable{0x0000001e}, name = "X"
+# CHECK-SAME: type = {0000000000000033} 0x{{[0-9A-F]*}} (char [56])
 
 
 # Generated from "char X[47];"
diff --git a/lldb/test/Shell/SymbolFile/DWARF/debug-types-address-ranges.s b/lldb/test/Shell/SymbolFile/DWARF/debug-types-address-ranges.s
--- a/lldb/test/Shell/SymbolFile/DWARF/debug-types-address-ranges.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/debug-types-address-ranges.s
@@ -11,11 +11,11 @@
 # RUN: %lldb %t -o "image lookup -a 0x48000 -v" -o exit | FileCheck %s
 
 # CHECK:   CompileUnit: id = {0x00000001}, file = "/tmp/a.cc", language = "c++"
-# CHECK:      Function: id = {0x7fffffff0000006a}, name = "::_start({{.*}})", range = [0x0000000000048000-0x000000000004800c)
+# CHECK:      Function: id = {0x0000006a}, name = "::_start({{.*}})", range = [0x0000000000048000-0x000000000004800c)
 # CHECK:     LineEntry: [0x0000000000048000-0x000000000004800a): /tmp/a.cc:4
 # CHECK:        Symbol: id = {0x00000002}, range = [0x0000000000048000-0x000000000004800c), name="_start"
-# CHECK:      Variable: id = {0x7fffffff00000075}, name = "v1", {{.*}} decl = a.cc:4
-# CHECK:      Variable: id = {0x7fffffff00000080}, name = "v2", {{.*}} decl = a.cc:4
+# CHECK:      Variable: id = {0x00000075}, name = "v1", {{.*}} decl = a.cc:4
+# CHECK:      Variable: id = {0x00000080}, name = "v2", {{.*}} decl = a.cc:4
 
 
 # Output generated via
diff --git a/lldb/test/Shell/SymbolFile/DWARF/debug-types-dwarf5.s b/lldb/test/Shell/SymbolFile/DWARF/debug-types-dwarf5.s
--- a/lldb/test/Shell/SymbolFile/DWARF/debug-types-dwarf5.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/debug-types-dwarf5.s
@@ -1,8 +1,8 @@
 # RUN: llvm-mc -triple=x86_64-pc-linux -filetype=obj %s > %t
 # RUN: %lldb %t -o "image lookup -v -s f1" -o exit | FileCheck %s
 
-# CHECK:  Function: id = {0x7fffffff0000003c}, name = "f1", range = [0x0000000000000000-0x0000000000000001)
-# CHECK:    Blocks: id = {0x7fffffff0000003c}, range = [0x00000000-0x00000001)
+# CHECK:  Function: id = {0x0000003c}, name = "f1", range = [0x0000000000000000-0x0000000000000001)
+# CHECK:    Blocks: id = {0x0000003c}, range = [0x00000000-0x00000001)
 
 
         .text
diff --git a/lldb/test/Shell/SymbolFile/DWARF/debug_ranges-missing-section.s b/lldb/test/Shell/SymbolFile/DWARF/debug_ranges-missing-section.s
--- a/lldb/test/Shell/SymbolFile/DWARF/debug_ranges-missing-section.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/debug_ranges-missing-section.s
@@ -4,8 +4,8 @@
 # RUN: %lldb %t -o "image lookup -v -s lookup_ranges" -o exit 2>&1 | FileCheck %s
 
 # CHECK: DIE has DW_AT_ranges(0x47) attribute, but range extraction failed (No debug_ranges section),
-# CHECK:  Function: id = {0x7fffffff0000001c}, name = "ranges", range = [0x0000000000000000-0x0000000000000004)
-# CHECK:    Blocks: id = {0x7fffffff0000001c}, range = [0x00000000-0x00000004)
+# CHECK:  Function: id = {0x0000001c}, name = "ranges", range = [0x0000000000000000-0x0000000000000004)
+# CHECK:    Blocks: id = {0x0000001c}, range = [0x00000000-0x00000004)
 
         .text
         .p2align 12
diff --git a/lldb/test/Shell/SymbolFile/DWARF/debug_ranges.s b/lldb/test/Shell/SymbolFile/DWARF/debug_ranges.s
--- a/lldb/test/Shell/SymbolFile/DWARF/debug_ranges.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/debug_ranges.s
@@ -3,9 +3,9 @@
 # RUN: llvm-mc -triple=x86_64-pc-linux -filetype=obj %s > %t
 # RUN: %lldb %t -o "image lookup -v -s lookup_ranges" -o exit | FileCheck %s
 
-# CHECK:  Function: id = {0x7fffffff0000002b}, name = "ranges", range = [0x0000000000000000-0x0000000000000004)
-# CHECK:    Blocks: id = {0x7fffffff0000002b}, range = [0x00000000-0x00000004)
-# CHECK-NEXT:       id = {0x7fffffff0000003f}, ranges = [0x00000001-0x00000002)[0x00000003-0x00000004)
+# CHECK:  Function: id = {0x0000002b}, name = "ranges", range = [0x0000000000000000-0x0000000000000004)
+# CHECK:    Blocks: id = {0x0000002b}, range = [0x00000000-0x00000004)
+# CHECK-NEXT:       id = {0x0000003f}, ranges = [0x00000001-0x00000002)[0x00000003-0x00000004)
 
         .text
         .p2align 12
diff --git a/lldb/test/Shell/SymbolFile/DWARF/debug_rnglists-dwo.s b/lldb/test/Shell/SymbolFile/DWARF/debug_rnglists-dwo.s
--- a/lldb/test/Shell/SymbolFile/DWARF/debug_rnglists-dwo.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/debug_rnglists-dwo.s
@@ -6,9 +6,9 @@
 # RUN:   -o exit | FileCheck %s
 
 # CHECK-LABEL: image lookup -v -s lookup_rnglists
-# CHECK:  Function: id = {0x00000028}, name = "rnglists", range = [0x0000000000000000-0x0000000000000003)
-# CHECK:    Blocks: id = {0x00000028}, range = [0x00000000-0x00000003)
-# CHECK-NEXT:       id = {0x00000037}, range = [0x00000001-0x00000002)
+# CHECK:  Function: id = {0x4000000000000028}, name = "rnglists", range = [0x0000000000000000-0x0000000000000003)
+# CHECK:    Blocks: id = {0x4000000000000028}, range = [0x00000000-0x00000003)
+# CHECK-NEXT:       id = {0x4000000000000037}, range = [0x00000001-0x00000002)
 
         .text
 rnglists:
diff --git a/lldb/test/Shell/SymbolFile/DWARF/debug_rnglists.s b/lldb/test/Shell/SymbolFile/DWARF/debug_rnglists.s
--- a/lldb/test/Shell/SymbolFile/DWARF/debug_rnglists.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/debug_rnglists.s
@@ -5,14 +5,14 @@
 # RUN:   -o "image lookup -v -s lookup_rnglists2" -o exit | FileCheck %s
 
 # CHECK-LABEL: image lookup -v -s lookup_rnglists
-# CHECK:  Function: id = {0x7fffffff00000030}, name = "rnglists", range = [0x0000000000000000-0x0000000000000004)
-# CHECK:    Blocks: id = {0x7fffffff00000030}, range = [0x00000000-0x00000004)
-# CHECK-NEXT:       id = {0x7fffffff00000046}, ranges = [0x00000001-0x00000002)[0x00000003-0x00000004)
+# CHECK:  Function: id = {0x00000030}, name = "rnglists", range = [0x0000000000000000-0x0000000000000004)
+# CHECK:    Blocks: id = {0x00000030}, range = [0x00000000-0x00000004)
+# CHECK-NEXT:       id = {0x00000046}, ranges = [0x00000001-0x00000002)[0x00000003-0x00000004)
 
 # CHECK-LABEL: image lookup -v -s lookup_rnglists2
-# CHECK:  Function: id = {0x7fffffff0000007a}, name = "rnglists2", range = [0x0000000000000004-0x0000000000000007)
-# CHECK:    Blocks: id = {0x7fffffff0000007a}, range = [0x00000004-0x00000007)
-# CHECK-NEXT:       id = {0x7fffffff00000091}, range = [0x00000005-0x00000007)
+# CHECK:  Function: id = {0x0000007a}, name = "rnglists2", range = [0x0000000000000004-0x0000000000000007)
+# CHECK:    Blocks: id = {0x0000007a}, range = [0x00000004-0x00000007)
+# CHECK-NEXT:       id = {0x00000091}, range = [0x00000005-0x00000007)
 
         .text
         .p2align 12
diff --git a/lldb/test/Shell/SymbolFile/DWARF/dwarf5_locations.s b/lldb/test/Shell/SymbolFile/DWARF/dwarf5_locations.s
--- a/lldb/test/Shell/SymbolFile/DWARF/dwarf5_locations.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/dwarf5_locations.s
@@ -6,7 +6,7 @@
 # RUN: ld.lld -m elf_x86_64 %t.o -o %t 
 # RUN: lldb-test symbols %t | FileCheck %s
 
-# CHECK: Variable{0x7fffffff00000011}, name = "color"
+# CHECK: Variable{0x00000011}, name = "color"
 # CHECK-SAME: location = DW_OP_addrx 0x0
 
         .text
diff --git a/lldb/test/Shell/SymbolFile/DWARF/dwp-debug-types.s b/lldb/test/Shell/SymbolFile/DWARF/dwp-debug-types.s
--- a/lldb/test/Shell/SymbolFile/DWARF/dwp-debug-types.s
+++ b/lldb/test/Shell/SymbolFile/DWARF/dwp-debug-types.s
@@ -16,15 +16,15 @@
 
 # Make sure each entity is present in the index only once.
 # SYMBOLS:      Globals and statics:
-# SYMBOLS-DAG: 3fffffff/INFO/00000023 "A"
-# SYMBOLS-DAG: 3fffffff/INFO/0000005a "A"
+# SYMBOLS-DAG: INFO/00000023 "A"
+# SYMBOLS-DAG: INFO/0000005a "A"
 # SYMBOLS-EMPTY:
 
 # SYMBOLS: Types:
-# SYMBOLS-DAG: 3fffffff/TYPE/00000018 "ENUM0"
-# SYMBOLS-DAG: 3fffffff/TYPE/0000004d "ENUM1"
-# SYMBOLS-DAG: 3fffffff/TYPE/0000002d "int"
-# SYMBOLS-DAG: 3fffffff/TYPE/00000062 "int"
+# SYMBOLS-DAG: TYPE/00000018 "ENUM0"
+# SYMBOLS-DAG: TYPE/0000004d "ENUM1"
+# SYMBOLS-DAG: TYPE/0000002d "int"
+# SYMBOLS-DAG: TYPE/00000062 "int"
 # SYMBOLS-EMPTY:
 
 .ifdef MAIN