diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
diff --git a/llvm/lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp b/llvm/lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp
@@ -363,6 +363,7 @@ void splitAndWriteThinLTOBitcode(
   W.writeModule(&M, /*ShouldPreserveUseListOrder=*/false, &Index,
                 /*GenerateHash=*/true, &ModHash);
   W.writeModule(MergedM.get());
+  W.writeStrtab();
   OS << Buffer;
 
   // If a minimized bitcode module was requested for the thin link,
@@ -375,6 +376,7 @@ void splitAndWriteThinLTOBitcode(
     W2.writeModule(&M, /*ShouldPreserveUseListOrder=*/false, &Index,
                    /*GenerateHash=*/false, &ModHash);
     W2.writeModule(MergedM.get());
+    W2.writeStrtab();
     *ThinLinkOS << Buffer;
   }
 }

diff --git a/llvm/test/Bitcode/thinlto-alias.ll b/llvm/test/Bitcode/thinlto-alias.ll
@@ -5,33 +5,31 @@
 ; RUN: llvm-lto -thinlto -o %t3 %t.o %t2.o
 ; RUN: llvm-bcanalyzer -dump %t3.thinlto.bc | FileCheck %s --check-prefix=COMBINED
 
+; CHECK: <SOURCE_FILENAME
+; "main"
+; CHECK-NEXT: <FUNCTION op0=0 op1=4
+; "analias"
+; CHECK-NEXT: <FUNCTION op0=4 op1=7
 ; CHECK:       <GLOBALVAL_SUMMARY_BLOCK
 ; CHECK-NEXT:    <VERSION
-; See if the call to func is registered, using the expected callsite count
-; and value id matching the subsequent value symbol table.
-; CHECK-NEXT:    <PERMODULE {{.*}} op4=[[FUNCID:[0-9]+]]/>
+; See if the call to func is registered.
+; The value id 1 matches the second FUNCTION record above.
+; CHECK-NEXT:    <PERMODULE {{.*}} op4=1/>
 ; CHECK-NEXT:  </GLOBALVAL_SUMMARY_BLOCK>
-; CHECK-NEXT:  <VALUE_SYMTAB
-; CHECK-NEXT:    <FNENTRY {{.*}} record string = 'main'
-; External function analias should have entry with value id FUNCID
-; CHECK-NEXT:    <ENTRY {{.*}} op0=[[FUNCID]] {{.*}} record string = 'analias'
-; CHECK-NEXT:  </VALUE_SYMTAB>
+
+; CHECK: <STRTAB_BLOCK
+; CHECK-NEXT: blob data = 'mainanalias'
 
 ; COMBINED:       <GLOBALVAL_SUMMARY_BLOCK
 ; COMBINED-NEXT:    <VERSION
-; See if the call to analias is registered, using the expected callsite count
-; and value id matching the subsequent value symbol table.
-; COMBINED-NEXT:    <COMBINED {{.*}} op5=[[ALIASID:[0-9]+]]/>
-; Followed by the alias and aliasee
+; See if the call to analias is registered, using the expected value id.
+; COMBINED-NEXT:    <VALUE_GUID op0=[[ALIASID:[0-9]+]] op1=-5751648690987223394/>
+; COMBINED-NEXT:    <VALUE_GUID
+; COMBINED-NEXT:    <VALUE_GUID op0=[[ALIASEEID:[0-9]+]] op1=-1039159065113703048/>
+; COMBINED-NEXT:    <COMBINED {{.*}} op5=[[ALIASID]]/>
 ; COMBINED-NEXT:    <COMBINED {{.*}}
-; COMBINED-NEXT:    <COMBINED_ALIAS  {{.*}} op3=[[ALIASEEID:[0-9]+]]
+; COMBINED-NEXT:    <COMBINED_ALIAS  {{.*}} op3=[[ALIASEEID]]
 ; COMBINED-NEXT:  </GLOBALVAL_SUMMARY_BLOCK
-; COMBINED-NEXT:  <VALUE_SYMTAB
-; Entry for function func should have entry with value id ALIASID
-; COMBINED-NEXT:    <COMBINED_ENTRY {{.*}} op0=[[ALIASID]] op1=-5751648690987223394/>
-; COMBINED-NEXT:    <COMBINED
-; COMBINED-NEXT:    <COMBINED_ENTRY {{.*}} op0=[[ALIASEEID]] op1=-1039159065113703048/>
-; COMBINED-NEXT:  </VALUE_SYMTAB>
 
 ; ModuleID = 'thinlto-function-summary-callgraph.ll'
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

diff --git a/llvm/test/Bitcode/thinlto-function-summary-callgraph-pgo.ll b/llvm/test/Bitcode/thinlto-function-summary-callgraph-pgo.ll
@@ -10,31 +10,27 @@
 ; RUN: llvm-lto -thinlto-index-stats %p/Inputs/thinlto-function-summary-callgraph-pgo.1.bc  | FileCheck %s --check-prefix=OLD
 ; RUN: llvm-lto -thinlto-index-stats %p/Inputs/thinlto-function-summary-callgraph-pgo-combined.1.bc  | FileCheck %s --check-prefix=OLD-COMBINED
 
+; CHECK: <SOURCE_FILENAME
+; CHECK-NEXT: <FUNCTION
+; "func"
+; CHECK-NEXT: <FUNCTION op0=4 op1=4
 ; CHECK:       <GLOBALVAL_SUMMARY_BLOCK
 ; CHECK-NEXT:    <VERSION
-; See if the call to func is registered, using the expected callsite count
-; and hotness type, with value id matching the subsequent value symbol table.
-; CHECK-NEXT:    <PERMODULE_PROFILE {{.*}} op4=[[FUNCID:[0-9]+]] op5=2/>
+; See if the call to func is registered, using the expected hotness type.
+; CHECK-NEXT:    <PERMODULE_PROFILE {{.*}} op4=1 op5=2/>
 ; CHECK-NEXT:  </GLOBALVAL_SUMMARY_BLOCK>
-; CHECK-NEXT:  <VALUE_SYMTAB
-; CHECK-NEXT:    <FNENTRY {{.*}} record string = 'main'
-; External function func should have entry with value id FUNCID
-; CHECK-NEXT:    <ENTRY {{.*}} op0=[[FUNCID]] {{.*}} record string = 'func'
-; CHECK-NEXT:  </VALUE_SYMTAB>
+; CHECK: <STRTAB_BLOCK
+; CHECK-NEXT: blob data = 'mainfunc'
 
 ; COMBINED:       <GLOBALVAL_SUMMARY_BLOCK
 ; COMBINED-NEXT:    <VERSION
+; COMBINED-NEXT:    <VALUE_GUID op0=[[FUNCID:[0-9]+]] op1=7289175272376759421/>
+; COMBINED-NEXT:    <VALUE_GUID
 ; COMBINED-NEXT:    <COMBINED
-; See if the call to func is registered, using the expected callsite count
-; and hotness type, with value id matching the subsequent value symbol table.
+; See if the call to func is registered, using the expected hotness type.
 ; op6=2 which is hotnessType::None.
-; COMBINED-NEXT:    <COMBINED_PROFILE {{.*}} op5=[[FUNCID:[0-9]+]] op6=2/>
+; COMBINED-NEXT:    <COMBINED_PROFILE {{.*}} op5=[[FUNCID]] op6=2/>
 ; COMBINED-NEXT:  </GLOBALVAL_SUMMARY_BLOCK>
-; COMBINED-NEXT:  <VALUE_SYMTAB
-; Entry for function func should have entry with value id FUNCID
-; COMBINED-NEXT:    <COMBINED_ENTRY {{.*}} op0=[[FUNCID]] op1=7289175272376759421/>
-; COMBINED-NEXT:    <COMBINED
-; COMBINED-NEXT:  </VALUE_SYMTAB>
 
 ; ModuleID = 'thinlto-function-summary-callgraph.ll'
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

diff --git a/llvm/test/Bitcode/thinlto-function-summary-callgraph-profile-summary.ll b/llvm/test/Bitcode/thinlto-function-summary-callgraph-profile-summary.ll
@@ -6,27 +6,45 @@
 ; RUN: llvm-bcanalyzer -dump %t3.thinlto.bc | FileCheck %s --check-prefix=COMBINED
 
 
+; CHECK: <SOURCE_FILENAME
+; "hot_function"
+; CHECK-NEXT: <FUNCTION op0=0 op1=12
+; "hot1"
+; CHECK-NEXT: <FUNCTION op0=12 op1=4
+; "hot2"
+; CHECK-NEXT: <FUNCTION op0=16 op1=4
+; "hot3"
+; CHECK-NEXT: <FUNCTION op0=20 op1=4
+; "hot4"
+; CHECK-NEXT: <FUNCTION op0=24 op1=4
+; "cold"
+; CHECK-NEXT: <FUNCTION op0=28 op1=4
+; "none1"
+; CHECK-NEXT: <FUNCTION op0=32 op1=5
+; "none2"
+; CHECK-NEXT: <FUNCTION op0=37 op1=5
+; "none3"
+; CHECK-NEXT: <FUNCTION op0=42 op1=5
 ; CHECK-LABEL:       <GLOBALVAL_SUMMARY_BLOCK
 ; CHECK-NEXT:    <VERSION
-; See if the call to func is registered, using the expected callsite count
-; and profile count, with value id matching the subsequent value symbol table.
-; CHECK-NEXT:    <PERMODULE_PROFILE {{.*}} op4=[[HOT1:.*]] op5=3 op6=[[COLD:.*]] op7=1 op8=[[HOT2:.*]] op9=3 op10=[[HOT4:.*]] op11=3 op12=[[NONE1:.*]] op13=2 op14=[[HOT3:.*]] op15=3 op16=[[NONE2:.*]] op17=2 op18=[[NONE3:.*]] op19=2 op20=[[LEGACY:.*]] op21=3/>
+; CHECK-NEXT:    <VALUE_GUID op0=25 op1=123/>
+; op4=hot1 op6=cold op8=hot2 op10=hot4 op12=none1 op14=hot3 op16=none2 op18=none3 op20=123
+; CHECK-NEXT:    <PERMODULE_PROFILE {{.*}} op4=1 op5=3 op6=5 op7=1 op8=2 op9=3 op10=4 op11=3 op12=6 op13=2 op14=3 op15=3 op16=7 op17=2 op18=8 op19=2 op20=25 op21=3/>
 ; CHECK-NEXT:  </GLOBALVAL_SUMMARY_BLOCK>
-; CHECK-LABEL:  <VALUE_SYMTAB
-; CHECK-NEXT:       <FNENTRY {{.*}} record string = 'hot_function
-; CHECK-DAG:        <ENTRY abbrevid=6 op0=[[NONE1]] {{.*}} record string = 'none1'
-; CHECK-DAG:        <ENTRY abbrevid=6 op0=[[COLD]] {{.*}} record string = 'cold'
-; CHECK-DAG:        <ENTRY abbrevid=6 op0=[[NONE2]] {{.*}} record string = 'none2'
-; CHECK-DAG:        <ENTRY abbrevid=6 op0=[[NONE3]] {{.*}} record string = 'none3'
-; CHECK-DAG:        <ENTRY abbrevid=6 op0=[[HOT1]] {{.*}} record string = 'hot1'
-; CHECK-DAG:        <ENTRY abbrevid=6 op0=[[HOT2]] {{.*}} record string = 'hot2'
-; CHECK-DAG:        <ENTRY abbrevid=6 op0=[[HOT3]] {{.*}} record string = 'hot3'
-; CHECK-DAG:        <ENTRY abbrevid=6 op0=[[HOT4]] {{.*}} record string = 'hot4'
-; CHECK-DAG:        <COMBINED_ENTRY abbrevid=11 op0=[[LEGACY]] op1=123/>
-; CHECK-LABEL:  </VALUE_SYMTAB>
+
+; CHECK: <STRTAB_BLOCK
+; CHECK-NEXT: blob data = 'hot_functionhot1hot2hot3hot4coldnone1none2none3'
 
 ; COMBINED:       <GLOBALVAL_SUMMARY_BLOCK
 ; COMBINED-NEXT:    <VERSION
+; COMBINED-NEXT:    <VALUE_GUID
+; COMBINED-NEXT:    <VALUE_GUID
+; COMBINED-NEXT:    <VALUE_GUID
+; COMBINED-NEXT:    <VALUE_GUID
+; COMBINED-NEXT:    <VALUE_GUID
+; COMBINED-NEXT:    <VALUE_GUID
+; COMBINED-NEXT:    <VALUE_GUID
+; COMBINED-NEXT:    <VALUE_GUID
 ; COMBINED-NEXT:    <COMBINED abbrevid=
 ; COMBINED-NEXT:    <COMBINED abbrevid=
 ; COMBINED-NEXT:    <COMBINED abbrevid=

diff --git a/llvm/test/Bitcode/thinlto-function-summary-callgraph.ll b/llvm/test/Bitcode/thinlto-function-summary-callgraph.ll
@@ -10,30 +10,27 @@
 ; RUN: llvm-lto -thinlto-index-stats %p/Inputs/thinlto-function-summary-callgraph.1.bc  | FileCheck %s --check-prefix=OLD
 ; RUN: llvm-lto -thinlto-index-stats %p/Inputs/thinlto-function-summary-callgraph-combined.1.bc  | FileCheck %s --check-prefix=OLD-COMBINED
 
+; CHECK: <SOURCE_FILENAME
+; CHECK-NEXT: <FUNCTION
+; "func"
+; CHECK-NEXT: <FUNCTION op0=4 op1=4
 ; CHECK:       <GLOBALVAL_SUMMARY_BLOCK
 ; CHECK-NEXT:    <VERSION
-; See if the call to func is registered, using the expected callsite count
-; and value id matching the subsequent value symbol table.
-; CHECK-NEXT:    <PERMODULE {{.*}} op4=[[FUNCID:[0-9]+]]/>
+; See if the call to func is registered.
+; CHECK-NEXT:    <PERMODULE {{.*}} op4=1/>
 ; CHECK-NEXT:  </GLOBALVAL_SUMMARY_BLOCK>
-; CHECK-NEXT:  <VALUE_SYMTAB
-; CHECK-NEXT:    <FNENTRY {{.*}} record string = 'main'
-; External function func should have entry with value id FUNCID
-; CHECK-NEXT:    <ENTRY {{.*}} op0=[[FUNCID]] {{.*}} record string = 'func'
-; CHECK-NEXT:  </VALUE_SYMTAB>
+; CHECK: <STRTAB_BLOCK
+; CHECK-NEXT: blob data = 'mainfunc'
+
 
 ; COMBINED:       <GLOBALVAL_SUMMARY_BLOCK
 ; COMBINED-NEXT:    <VERSION
+; COMBINED-NEXT:    <VALUE_GUID op0=[[FUNCID:[0-9]+]] op1=7289175272376759421/>
+; COMBINED-NEXT:    <VALUE_GUID
 ; COMBINED-NEXT:    <COMBINED
-; See if the call to func is registered, using the expected callsite count
-; and value id matching the subsequent value symbol table.
-; COMBINED-NEXT:    <COMBINED {{.*}} op5=[[FUNCID:[0-9]+]]/>
+; See if the call to func is registered.
+; COMBINED-NEXT:    <COMBINED {{.*}} op5=[[FUNCID]]/>
 ; COMBINED-NEXT:  </GLOBALVAL_SUMMARY_BLOCK>
-; COMBINED-NEXT:  <VALUE_SYMTAB
-; Entry for function func should have entry with value id FUNCID
-; COMBINED-NEXT:    <COMBINED_ENTRY {{.*}} op0=[[FUNCID]] op1=7289175272376759421/>
-; COMBINED-NEXT:    <COMBINED
-; COMBINED-NEXT:  </VALUE_SYMTAB>
 
 ; ModuleID = 'thinlto-function-summary-callgraph.ll'
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
@@ -49,4 +46,4 @@ entry:
 declare void @func(...) #1
 
 ; OLD: Index {{.*}} contains 1 nodes (1 functions, 0 alias, 0 globals) and 1 edges (0 refs and 1 calls)
-; OLD-COMBINED: Index {{.*}} contains 2 nodes (2 functions, 0 alias, 0 globals) and 1 edges (0 refs and 1 calls)
+; OLD-COMBINED: Index {{.*}} contains 2 nodes (2 functions, 0 alias, 0 globals) and 1 edges (0 refs and 1 calls)
diff --git a/llvm/test/Bitcode/thinlto-function-summary-originalnames.ll b/llvm/test/Bitcode/thinlto-function-summary-originalnames.ll
@@ -5,18 +5,16 @@
 
 ; COMBINED:       <GLOBALVAL_SUMMARY_BLOCK
 ; COMBINED-NEXT:    <VERSION
+; COMBINED-NEXT:    <VALUE_GUID {{.*}} op1=4947176790635855146/>
+; COMBINED-NEXT:    <VALUE_GUID {{.*}} op1=-6591587165810580810/>
+; COMBINED-NEXT:    <VALUE_GUID {{.*}} op1=-4377693495213223786/>
 ; COMBINED-DAG:    <COMBINED
 ; COMBINED-DAG:    <COMBINED_ORIGINAL_NAME op0=6699318081062747564/>
 ; COMBINED-DAG:    <COMBINED_GLOBALVAR_INIT_REFS
 ; COMBINED-DAG:    <COMBINED_ORIGINAL_NAME op0=-2012135647395072713/>
 ; COMBINED-DAG:    <COMBINED_ALIAS
 ; COMBINED-DAG:    <COMBINED_ORIGINAL_NAME op0=-4170563161550796836/>
 ; COMBINED-NEXT:  </GLOBALVAL_SUMMARY_BLOCK>
-; COMBINED-NEXT:  <VALUE_SYMTAB
-; COMBINED-NEXT:   <COMBINED_ENTRY {{.*}} op1=4947176790635855146/>
-; COMBINED-NEXT:   <COMBINED_ENTRY {{.*}} op1=-6591587165810580810/>
-; COMBINED-NEXT:   <COMBINED_ENTRY {{.*}} op1=-4377693495213223786/>
-; COMBINED-NEXT:  </VALUE_SYMTAB>
 
 source_filename = "/path/to/source.c"
 

diff --git a/llvm/test/Bitcode/thinlto-function-summary-refgraph.ll b/llvm/test/Bitcode/thinlto-function-summary-refgraph.ll
@@ -2,6 +2,32 @@
 ; RUN: opt -module-summary %s -o %t.o
 ; RUN: llvm-bcanalyzer -dump %t.o | FileCheck %s
 
+; CHECK: <SOURCE_FILENAME
+; "bar"
+; CHECK-NEXT: <GLOBALVAR {{.*}} op0=0 op1=3
+; "globalvar"
+; CHECK-NEXT: <GLOBALVAR {{.*}} op0=3 op1=9
+; "func"
+; CHECK-NEXT: <FUNCTION op0=12 op1=4
+; "func2"
+; CHECK-NEXT: <FUNCTION op0=16 op1=5
+; "foo"
+; CHECK-NEXT: <FUNCTION op0=21 op1=3
+; "func3"
+; CHECK-NEXT: <FUNCTION op0=24 op1=5
+; "W"
+; CHECK-NEXT: <FUNCTION op0=29 op1=1
+; "X"
+; CHECK-NEXT: <FUNCTION op0=30 op1=1
+; "Y"
+; CHECK-NEXT: <FUNCTION op0=31 op1=1
+; "Z"
+; CHECK-NEXT: <FUNCTION op0=32 op1=1
+; "llvm.ctpop.i8"
+; CHECK-NEXT: <FUNCTION op0=33 op1=13
+; "main"
+; CHECK-NEXT: <FUNCTION op0=46 op1=4
+
 ; See if the calls and other references are recorded properly using the
 ; expected value id and other information as appropriate (callsite cout
 ; for calls). Use different linkage types for the various test cases to
@@ -11,37 +37,32 @@
 ; llvm.ctpop.i8.
 ; CHECK:       <GLOBALVAL_SUMMARY_BLOCK
 ; Function main contains call to func, as well as address reference to func:
-; CHECK-DAG:    <PERMODULE {{.*}} op0=[[MAINID:[0-9]+]] op1=0 {{.*}} op3=1 op4=[[FUNCID:[0-9]+]] op5=[[FUNCID]]/>
+; op0=main op4=func op5=func
+; CHECK-DAG:    <PERMODULE {{.*}} op0=11 op1=0 {{.*}} op3=1 op4=2 op5=2/>
 ; Function W contains a call to func3 as well as a reference to globalvar:
-; CHECK-DAG:    <PERMODULE {{.*}} op0=[[WID:[0-9]+]] op1=5 {{.*}} op3=1 op4=[[GLOBALVARID:[0-9]+]] op5=[[FUNC3ID:[0-9]+]]/>
+; op0=W op4=globalvar op5=func3
+; CHECK-DAG:    <PERMODULE {{.*}} op0=6 op1=5 {{.*}} op3=1 op4=1 op5=5/>
 ; Function X contains call to foo, as well as address reference to foo
 ; which is in the same instruction as the call:
-; CHECK-DAG:    <PERMODULE {{.*}} op0=[[XID:[0-9]+]] op1=1 {{.*}} op3=1 op4=[[FOOID:[0-9]+]] op5=[[FOOID]]/>
+; op0=X op4=foo op5=foo
+; CHECK-DAG:    <PERMODULE {{.*}} op0=7 op1=1 {{.*}} op3=1 op4=4 op5=4/>
 ; Function Y contains call to func2, and ensures we don't incorrectly add
 ; a reference to it when reached while earlier analyzing the phi using its
 ; return value:
-; CHECK-DAG:    <PERMODULE {{.*}} op0=[[YID:[0-9]+]] op1=8 {{.*}} op3=0 op4=[[FUNC2ID:[0-9]+]]/>
+; op0=Y op4=func2
+; CHECK-DAG:    <PERMODULE {{.*}} op0=8 op1=8 {{.*}} op3=0 op4=3/>
 ; Function Z contains call to func2, and ensures we don't incorrectly add
 ; a reference to it when reached while analyzing subsequent use of its return
 ; value:
-; CHECK-DAG:    <PERMODULE {{.*}} op0=[[ZID:[0-9]+]] op1=3 {{.*}} op3=0 op4=[[FUNC2ID:[0-9]+]]/>
+; op0=Z op4=func2
+; CHECK-DAG:    <PERMODULE {{.*}} op0=9 op1=3 {{.*}} op3=0 op4=3/>
 ; Variable bar initialization contains address reference to func:
-; CHECK-DAG:    <PERMODULE_GLOBALVAR_INIT_REFS {{.*}} op0=[[BARID:[0-9]+]] op1=0 op2=[[FUNCID]]/>
+; op0=bar op2=func
+; CHECK-DAG:    <PERMODULE_GLOBALVAR_INIT_REFS {{.*}} op0=0 op1=0 op2=2/>
 ; CHECK:  </GLOBALVAL_SUMMARY_BLOCK>
 
-; CHECK-NEXT:  <VALUE_SYMTAB
-; CHECK-DAG:    <ENTRY {{.*}} op0=[[BARID]] {{.*}} record string = 'bar'
-; CHECK-DAG:    <ENTRY {{.*}} op0=[[FUNCID]] {{.*}} record string = 'func'
-; CHECK-DAG:    <ENTRY {{.*}} op0=[[FOOID]] {{.*}} record string = 'foo'
-; CHECK-DAG:    <FNENTRY {{.*}} op0=[[MAINID]] {{.*}} record string = 'main'
-; CHECK-DAG:    <FNENTRY {{.*}} op0=[[WID]] {{.*}} record string = 'W'
-; CHECK-DAG:    <FNENTRY {{.*}} op0=[[XID]] {{.*}} record string = 'X'
-; CHECK-DAG:    <FNENTRY {{.*}} op0=[[YID]] {{.*}} record string = 'Y'
-; CHECK-DAG:    <FNENTRY {{.*}} op0=[[ZID]] {{.*}} record string = 'Z'
-; CHECK-DAG:    <ENTRY {{.*}} op0=[[FUNC2ID]] {{.*}} record string = 'func2'
-; CHECK-DAG:    <ENTRY {{.*}} op0=[[FUNC3ID]] {{.*}} record string = 'func3'
-; CHECK-DAG:    <ENTRY {{.*}} op0=[[GLOBALVARID]] {{.*}} record string = 'globalvar'
-; CHECK:  </VALUE_SYMTAB>
+; CHECK: <STRTAB_BLOCK
+; CHECK-NEXT: blob data = 'barglobalvarfuncfunc2foofunc3WXYZllvm.ctpop.i8main'
 
 ; ModuleID = 'thinlto-function-summary-refgraph.ll'
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

diff --git a/llvm/test/Bitcode/thinlto-function-summary.ll b/llvm/test/Bitcode/thinlto-function-summary.ll
@@ -2,9 +2,19 @@
 ; RUN: opt -passes=name-anon-globals -module-summary < %s | llvm-bcanalyzer -dump | FileCheck %s -check-prefix=BC
 ; Check for summary block/records.
 
-; Check the value ids in the summary entries against the
-; same in the ValueSumbolTable, to ensure the ordering is stable.
-; Also check the linkage field on the summary entries.
+; BC: <SOURCE_FILENAME
+; "h"
+; BC-NEXT: <GLOBALVAR {{.*}} op0=0 op1=1
+; "foo"
+; BC-NEXT: <FUNCTION op0=1 op1=3
+; "bar"
+; BC-NEXT: <FUNCTION op0=4 op1=3
+; "anon.[32 chars].0"
+; BC-NEXT: <FUNCTION op0=7 op1=39
+; "variadic"
+; BC-NEXT: <FUNCTION op0=46 op1=8
+; "f"
+; BC-NEXT: <ALIAS op0=54 op1=1
 ; BC: <GLOBALVAL_SUMMARY_BLOCK
 ; BC-NEXT: <VERSION
 ; BC-NEXT: <PERMODULE {{.*}} op0=1 op1=0
@@ -13,13 +23,8 @@
 ; BC-NEXT: <PERMODULE {{.*}} op0=4 op1=16
 ; BC-NEXT: <ALIAS {{.*}} op0=5 op1=0 op2=3
 ; BC-NEXT: </GLOBALVAL_SUMMARY_BLOCK
-; BC-NEXT: <VALUE_SYMTAB
-; BC-NEXT: <FNENTRY {{.*}} op0=4 {{.*}}> record string = 'variadic'
-; BC-NEXT: <FNENTRY {{.*}} op0=1 {{.*}}> record string = 'foo'
-; BC-NEXT: <FNENTRY {{.*}} op0=2 {{.*}}> record string = 'bar'
-; BC-NEXT: <ENTRY {{.*}} op0=5 {{.*}}> record string = 'f'
-; BC-NEXT: <ENTRY {{.*}} record string = 'h'
-; BC-NEXT: <FNENTRY {{.*}} op0=3 {{.*}}> record string = 'anon.
+; BC: <STRTAB_BLOCK
+; BC-NEXT: blob data = 'hfoobaranon.{{................................}}.0variadicf'
 
 
 ; RUN: opt -name-anon-globals -module-summary < %s | llvm-dis | FileCheck %s

diff --git a/llvm/test/ThinLTO/X86/autoupgrade.ll b/llvm/test/ThinLTO/X86/autoupgrade.ll
@@ -9,10 +9,8 @@
 ; RUN:            -import=globalfunc1:%p/Inputs/autoupgrade.bc %t.bc \
 ; RUN:     | llvm-bcanalyzer -dump | FileCheck %s
 
-
-; CHECK-NOT: 'llvm.invariant.start'
-; CHECK: record string = 'llvm.invariant.start.p0i8'
-; CHECK-NOT: 'llvm.invariant.start'
+; CHECK: <STRTAB_BLOCK
+; CHECK-NEXT: blob data = 'mainglobalfunc1llvm.invariant.start.p0i8'
 
 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-apple-macosx10.11.0"

diff --git a/llvm/test/ThinLTO/X86/distributed_indexes.ll b/llvm/test/ThinLTO/X86/distributed_indexes.ll
@@ -13,15 +13,11 @@
 ; BACKEND1-NEXT: </MODULE_STRTAB_BLOCK
 ; BACKEND1-NEXT: <GLOBALVAL_SUMMARY_BLOCK
 ; BACKEND1-NEXT: <VERSION
+; BACKEND1-NEXT: <VALUE_GUID op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
+; BACKEND1-NEXT: <VALUE_GUID op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
 ; BACKEND1-NEXT: <COMBINED
 ; BACKEND1-NEXT: <COMBINED
 ; BACKEND1-NEXT: </GLOBALVAL_SUMMARY_BLOCK
-; BACKEND1-NEXT: <VALUE_SYMTAB
-; Check that the format is: op0=valueid, op1=offset, op2=funcguid,
-; where funcguid is the lower 64 bits of the function name MD5.
-; BACKEND1-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
-; BACKEND1-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
-; BACKEND1-NEXT: </VALUE_SYMTAB
 
 ; The backend index for Input/distributed_indexes.ll contains summaries from
 ; itself only, as it does not import anything.
@@ -30,13 +26,9 @@
 ; BACKEND2-NEXT: </MODULE_STRTAB_BLOCK
 ; BACKEND2-NEXT: <GLOBALVAL_SUMMARY_BLOCK
 ; BACKEND2-NEXT: <VERSION
+; BACKEND2-NEXT: <VALUE_GUID op0=1 op1=-5300342847281564238
 ; BACKEND2-NEXT: <COMBINED
 ; BACKEND2-NEXT: </GLOBALVAL_SUMMARY_BLOCK
-; BACKEND2-NEXT: <VALUE_SYMTAB
-; Check that the format is: op0=valueid, op1=offset, op2=funcguid,
-; where funcguid is the lower 64 bits of the function name MD5.
-; BACKEND2-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0=1 op1=-5300342847281564238
-; BACKEND2-NEXT: </VALUE_SYMTAB
 
 declare void @g(...)
 

diff --git a/llvm/test/tools/gold/X86/thinlto.ll b/llvm/test/tools/gold/X86/thinlto.ll
@@ -82,15 +82,11 @@
 ; BACKEND1-NEXT: </MODULE_STRTAB_BLOCK
 ; BACKEND1-NEXT: <GLOBALVAL_SUMMARY_BLOCK
 ; BACKEND1-NEXT: <VERSION
+; BACKEND1-NEXT: <VALUE_GUID op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
+; BACKEND1-NEXT: <VALUE_GUID op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
 ; BACKEND1-NEXT: <COMBINED
 ; BACKEND1-NEXT: <COMBINED
 ; BACKEND1-NEXT: </GLOBALVAL_SUMMARY_BLOCK
-; BACKEND1-NEXT: <VALUE_SYMTAB
-; Check that the format is: op0=valueid, op1=offset, op2=funcguid,
-; where funcguid is the lower 64 bits of the function name MD5.
-; BACKEND1-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
-; BACKEND1-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
-; BACKEND1-NEXT: </VALUE_SYMTAB
 
 ; The backend index for Input/thinlto.ll contains summaries from itself only,
 ; as it does not import anything.
@@ -99,29 +95,21 @@
 ; BACKEND2-NEXT: </MODULE_STRTAB_BLOCK
 ; BACKEND2-NEXT: <GLOBALVAL_SUMMARY_BLOCK
 ; BACKEND2-NEXT: <VERSION
+; BACKEND2-NEXT: <VALUE_GUID op0=1 op1=-5300342847281564238
 ; BACKEND2-NEXT: <COMBINED
 ; BACKEND2-NEXT: </GLOBALVAL_SUMMARY_BLOCK
-; BACKEND2-NEXT: <VALUE_SYMTAB
-; Check that the format is: op0=valueid, op1=offset, op2=funcguid,
-; where funcguid is the lower 64 bits of the function name MD5.
-; BACKEND2-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0=1 op1=-5300342847281564238
-; BACKEND2-NEXT: </VALUE_SYMTAB
 
 ; COMBINED: <MODULE_STRTAB_BLOCK
 ; COMBINED-NEXT: <ENTRY {{.*}} record string = '{{.*}}/test/tools/gold/X86/Output/thinlto.ll.tmp{{.*}}.o'
 ; COMBINED-NEXT: <ENTRY {{.*}} record string = '{{.*}}/test/tools/gold/X86/Output/thinlto.ll.tmp{{.*}}.o'
 ; COMBINED-NEXT: </MODULE_STRTAB_BLOCK
 ; COMBINED-NEXT: <GLOBALVAL_SUMMARY_BLOCK
 ; COMBINED-NEXT: <VERSION
+; COMBINED-NEXT: <VALUE_GUID op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
+; COMBINED-NEXT: <VALUE_GUID op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
 ; COMBINED-NEXT: <COMBINED
 ; COMBINED-NEXT: <COMBINED
 ; COMBINED-NEXT: </GLOBALVAL_SUMMARY_BLOCK
-; COMBINED-NEXT: <VALUE_SYMTAB
-; Check that the format is: op0=valueid, op1=offset, op2=funcguid,
-; where funcguid is the lower 64 bits of the function name MD5.
-; COMBINED-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
-; COMBINED-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
-; COMBINED-NEXT: </VALUE_SYMTAB
 
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"

diff --git a/llvm/test/tools/llvm-lto/thinlto.ll b/llvm/test/tools/llvm-lto/thinlto.ll
@@ -11,15 +11,11 @@
 ; COMBINED-NEXT: </MODULE_STRTAB_BLOCK
 ; COMBINED-NEXT: <GLOBALVAL_SUMMARY_BLOCK
 ; COMBINED-NEXT: <VERSION
+; COMBINED-NEXT: <VALUE_GUID op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
+; COMBINED-NEXT: <VALUE_GUID op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
 ; COMBINED-NEXT: <COMBINED
 ; COMBINED-NEXT: <COMBINED
 ; COMBINED-NEXT: </GLOBALVAL_SUMMARY_BLOCK
-; COMBINED-NEXT: <VALUE_SYMTAB
-; Check that the format is: op0=valueid, op1=offset, op2=funcguid,
-; where funcguid is the lower 64 bits of the function name MD5.
-; COMBINED-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
-; COMBINED-NEXT: <COMBINED_ENTRY abbrevid={{[0-9]+}} op0={{1|2}} op1={{-3706093650706652785|-5300342847281564238}}
-; COMBINED-NEXT: </VALUE_SYMTAB
 
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 

diff --git a/llvm/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp b/llvm/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
@@ -122,6 +122,7 @@ static const char *GetBlockName(unsigned BlockID,
   case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
                                            return "GLOBALVAL_SUMMARY_BLOCK";
   case bitc::MODULE_STRTAB_BLOCK_ID:       return "MODULE_STRTAB_BLOCK";
+  case bitc::STRTAB_BLOCK_ID:              return "STRTAB_BLOCK";
   }
 }
 
@@ -315,6 +316,7 @@ static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
       STRINGIFY_CODE(FS, TYPE_CHECKED_LOAD_VCALLS)
       STRINGIFY_CODE(FS, TYPE_TEST_ASSUME_CONST_VCALL)
       STRINGIFY_CODE(FS, TYPE_CHECKED_LOAD_CONST_VCALL)
+      STRINGIFY_CODE(FS, VALUE_GUID)
     }
   case bitc::METADATA_ATTACHMENT_ID:
     switch(CodeID) {
@@ -381,6 +383,11 @@ static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
     default: return nullptr;
     case bitc::OPERAND_BUNDLE_TAG: return "OPERAND_BUNDLE_TAG";
     }
+  case bitc::STRTAB_BLOCK_ID:
+    switch(CodeID) {
+    default: return nullptr;
+    case bitc::STRTAB_BLOB: return "BLOB";
+    }
   }
 #undef STRINGIFY_CODE
 }

diff --git a/llvm/tools/llvm-cat/llvm-cat.cpp b/llvm/tools/llvm-cat/llvm-cat.cpp
@@ -44,11 +44,16 @@ int main(int argc, char **argv) {
       std::unique_ptr<MemoryBuffer> MB = ExitOnErr(
           errorOrToExpected(MemoryBuffer::getFileOrSTDIN(InputFilename)));
       std::vector<BitcodeModule> Mods = ExitOnErr(getBitcodeModuleList(*MB));
-      for (auto &BitcodeMod : Mods)
+      for (auto &BitcodeMod : Mods) {
         Buffer.insert(Buffer.end(), BitcodeMod.getBuffer().begin(),
                       BitcodeMod.getBuffer().end());
+        Writer.copyStrtab(BitcodeMod.getStrtab());
+      }
     }
   } else {
+    // The string table does not own strings added to it, some of which are
+    // owned by the modules; keep them alive until we write the string table.
+    std::vector<std::unique_ptr<Module>> OwnedMods;
     for (const auto &InputFilename : InputFilenames) {
       SMDiagnostic Err;
       std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context);
@@ -57,7 +62,9 @@ int main(int argc, char **argv) {
         return 1;
       }
       Writer.writeModule(M.get());
+      OwnedMods.push_back(std::move(M));
     }
+    Writer.writeStrtab();
   }
 
   std::error_code EC;

diff --git a/llvm/tools/llvm-modextract/llvm-modextract.cpp b/llvm/tools/llvm-modextract/llvm-modextract.cpp
@@ -59,9 +59,12 @@ int main(int argc, char **argv) {
   ExitOnErr(errorCodeToError(EC));
 
   if (BinaryExtract) {
-    SmallVector<char, 0> Header;
-    BitcodeWriter Writer(Header);
-    Out->os() << Header << Ms[ModuleIndex].getBuffer();
+    SmallVector<char, 0> Result;
+    BitcodeWriter Writer(Result);
+    Result.append(Ms[ModuleIndex].getBuffer().begin(),
+                  Ms[ModuleIndex].getBuffer().end());
+    Writer.copyStrtab(Ms[ModuleIndex].getStrtab());
+    Out->os() << Result;
     Out->keep();
     return 0;
   }