From eadc28274b9529137d0f7f073f1a5f07d8d3d9f8 Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis@chromium.org>
Date: Wed, 15 Jan 2020 13:30:57 -0500
Subject: [PATCH] [gn build] add multi-line forcing comments in more places

---
 .../clang-tools-extra/clang-apply-replacements/BUILD.gn         | 1 +
 .../clang-tools-extra/clang-apply-replacements/tool/BUILD.gn    | 1 +
 .../secondary/clang-tools-extra/clang-change-namespace/BUILD.gn | 1 +
 .../clang-tools-extra/clang-change-namespace/tool/BUILD.gn      | 1 +
 .../gn/secondary/clang-tools-extra/clang-doc/tool/BUILD.gn      | 1 +
 .../clang-include-fixer/find-all-symbols/tool/BUILD.gn          | 1 +
 .../clang-tools-extra/clang-include-fixer/plugin/BUILD.gn       | 1 +
 .../clang-tools-extra/clang-include-fixer/tool/BUILD.gn         | 1 +
 .../gn/secondary/clang-tools-extra/clang-move/tool/BUILD.gn     | 1 +
 .../gn/secondary/clang-tools-extra/clang-query/tool/BUILD.gn    | 1 +
 .../secondary/clang-tools-extra/clang-reorder-fields/BUILD.gn   | 1 +
 .../clang-tools-extra/clang-reorder-fields/tool/BUILD.gn        | 1 +
 .../gn/secondary/clang-tools-extra/clang-tidy/plugin/BUILD.gn   | 1 +
 .../gn/secondary/clang-tools-extra/clang-tidy/tool/BUILD.gn     | 1 +
 .../secondary/clang-tools-extra/clangd/index/dex/dexp/BUILD.gn  | 1 +
 .../gn/secondary/clang-tools-extra/clangd/indexer/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/clang-tools-extra/clangd/tool/BUILD.gn  | 1 +
 .../secondary/clang-tools-extra/clangd/unittests/xpc/BUILD.gn   | 1 +
 llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/BUILD.gn   | 2 ++
 .../secondary/clang-tools-extra/clangd/xpc/framework/BUILD.gn   | 1 +
 .../secondary/clang-tools-extra/clangd/xpc/test-client/BUILD.gn | 1 +
 .../unittests/clang-apply-replacements/BUILD.gn                 | 1 +
 .../clang-tools-extra/unittests/clang-change-namespace/BUILD.gn | 1 +
 .../unittests/clang-include-fixer/find-all-symbols/BUILD.gn     | 1 +
 .../secondary/clang-tools-extra/unittests/clang-move/BUILD.gn   | 1 +
 llvm/utils/gn/secondary/clang/lib/CrossTU/BUILD.gn              | 1 +
 llvm/utils/gn/secondary/clang/lib/FrontendTool/BUILD.gn         | 1 +
 llvm/utils/gn/secondary/clang/lib/Tooling/ASTDiff/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/clang/tools/arcmt-test/BUILD.gn         | 1 +
 llvm/utils/gn/secondary/clang/tools/c-arcmt-test/BUILD.gn       | 1 +
 llvm/utils/gn/secondary/clang/tools/clang-check/BUILD.gn        | 1 +
 llvm/utils/gn/secondary/clang/tools/clang-diff/BUILD.gn         | 1 +
 .../gn/secondary/clang/tools/clang-extdef-mapping/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/clang/tools/clang-format/BUILD.gn       | 1 +
 llvm/utils/gn/secondary/clang/tools/clang-import-test/BUILD.gn  | 1 +
 .../gn/secondary/clang/tools/clang-offload-bundler/BUILD.gn     | 1 +
 .../gn/secondary/clang/tools/clang-offload-wrapper/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/clang/tools/clang-rename/BUILD.gn       | 1 +
 llvm/utils/gn/secondary/clang/tools/clang-scan-deps/BUILD.gn    | 1 +
 llvm/utils/gn/secondary/clang/unittests/CrossTU/BUILD.gn        | 1 +
 llvm/utils/gn/secondary/clang/unittests/Index/BUILD.gn          | 1 +
 llvm/utils/gn/secondary/clang/unittests/Serialization/BUILD.gn  | 1 +
 llvm/utils/gn/secondary/clang/unittests/libclang/BUILD.gn       | 1 +
 .../gn/secondary/clang/unittests/libclang/CrashTests/BUILD.gn   | 1 +
 llvm/utils/gn/secondary/compiler-rt/lib/cfi/BUILD.gn            | 1 +
 llvm/utils/gn/secondary/compiler-rt/lib/hwasan/BUILD.gn         | 1 +
 .../gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn      | 1 +
 .../gn/secondary/compiler-rt/lib/scudo/standalone/BUILD.gn      | 2 ++
 .../compiler-rt/lib/scudo/standalone/benchmarks/BUILD.gn        | 1 +
 llvm/utils/gn/secondary/libcxx/src/BUILD.gn                     | 1 +
 llvm/utils/gn/secondary/lld/MinGW/BUILD.gn                      | 1 +
 llvm/utils/gn/secondary/lld/lib/Driver/BUILD.gn                 | 1 +
 llvm/utils/gn/secondary/lld/lib/ReaderWriter/BUILD.gn           | 1 +
 llvm/utils/gn/secondary/lld/lib/ReaderWriter/YAML/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/lld/tools/lld/BUILD.gn                  | 1 +
 llvm/utils/gn/secondary/lld/unittests/DriverTests/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/lib/Bitstream/Reader/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/lib/ExecutionEngine/MCJIT/BUILD.gn | 1 +
 llvm/utils/gn/secondary/llvm/lib/IRReader/BUILD.gn              | 1 +
 llvm/utils/gn/secondary/llvm/lib/LineEditor/BUILD.gn            | 1 +
 .../gn/secondary/llvm/lib/Target/AArch64/AsmParser/BUILD.gn     | 1 +
 .../gn/secondary/llvm/lib/Target/AArch64/TargetInfo/BUILD.gn    | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/AArch64/Utils/BUILD.gn  | 1 +
 .../gn/secondary/llvm/lib/Target/AMDGPU/AsmParser/BUILD.gn      | 1 +
 .../gn/secondary/llvm/lib/Target/AMDGPU/Disassembler/BUILD.gn   | 1 +
 .../gn/secondary/llvm/lib/Target/AMDGPU/TargetInfo/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/ARM/AsmParser/BUILD.gn  | 1 +
 .../gn/secondary/llvm/lib/Target/ARM/Disassembler/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/ARM/TargetInfo/BUILD.gn | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/ARM/Utils/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/AVR/AsmParser/BUILD.gn  | 1 +
 .../gn/secondary/llvm/lib/Target/AVR/Disassembler/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/AVR/TargetInfo/BUILD.gn | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/BPF/AsmParser/BUILD.gn  | 1 +
 .../gn/secondary/llvm/lib/Target/BPF/Disassembler/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/BPF/TargetInfo/BUILD.gn | 1 +
 .../gn/secondary/llvm/lib/Target/Hexagon/AsmParser/BUILD.gn     | 1 +
 .../gn/secondary/llvm/lib/Target/Hexagon/Disassembler/BUILD.gn  | 1 +
 .../gn/secondary/llvm/lib/Target/Hexagon/TargetInfo/BUILD.gn    | 1 +
 .../utils/gn/secondary/llvm/lib/Target/Lanai/AsmParser/BUILD.gn | 1 +
 .../gn/secondary/llvm/lib/Target/Lanai/Disassembler/BUILD.gn    | 1 +
 .../gn/secondary/llvm/lib/Target/Lanai/TargetInfo/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/Mips/AsmParser/BUILD.gn | 1 +
 .../gn/secondary/llvm/lib/Target/Mips/Disassembler/BUILD.gn     | 1 +
 .../utils/gn/secondary/llvm/lib/Target/Mips/TargetInfo/BUILD.gn | 1 +
 .../gn/secondary/llvm/lib/Target/NVPTX/TargetInfo/BUILD.gn      | 1 +
 .../gn/secondary/llvm/lib/Target/PowerPC/AsmParser/BUILD.gn     | 1 +
 .../gn/secondary/llvm/lib/Target/PowerPC/Disassembler/BUILD.gn  | 1 +
 .../gn/secondary/llvm/lib/Target/PowerPC/TargetInfo/BUILD.gn    | 1 +
 .../utils/gn/secondary/llvm/lib/Target/RISCV/AsmParser/BUILD.gn | 1 +
 .../gn/secondary/llvm/lib/Target/RISCV/Disassembler/BUILD.gn    | 1 +
 .../gn/secondary/llvm/lib/Target/RISCV/TargetInfo/BUILD.gn      | 1 +
 .../utils/gn/secondary/llvm/lib/Target/Sparc/AsmParser/BUILD.gn | 1 +
 .../gn/secondary/llvm/lib/Target/Sparc/Disassembler/BUILD.gn    | 1 +
 .../gn/secondary/llvm/lib/Target/Sparc/TargetInfo/BUILD.gn      | 1 +
 .../gn/secondary/llvm/lib/Target/SystemZ/AsmParser/BUILD.gn     | 1 +
 .../gn/secondary/llvm/lib/Target/SystemZ/Disassembler/BUILD.gn  | 1 +
 .../gn/secondary/llvm/lib/Target/SystemZ/TargetInfo/BUILD.gn    | 1 +
 .../gn/secondary/llvm/lib/Target/WebAssembly/AsmParser/BUILD.gn | 1 +
 .../secondary/llvm/lib/Target/WebAssembly/Disassembler/BUILD.gn | 1 +
 .../secondary/llvm/lib/Target/WebAssembly/TargetInfo/BUILD.gn   | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/X86/AsmParser/BUILD.gn  | 1 +
 .../gn/secondary/llvm/lib/Target/X86/Disassembler/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/X86/TargetInfo/BUILD.gn | 1 +
 llvm/utils/gn/secondary/llvm/lib/Target/X86/Utils/BUILD.gn      | 1 +
 .../gn/secondary/llvm/lib/ToolDrivers/llvm-dlltool/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/lib/ToolDrivers/llvm-lib/BUILD.gn  | 1 +
 llvm/utils/gn/secondary/llvm/lib/Transforms/CFGuard/BUILD.gn    | 1 +
 llvm/utils/gn/secondary/llvm/lib/Transforms/Hello/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/lib/WindowsManifest/BUILD.gn       | 1 +
 llvm/utils/gn/secondary/llvm/tools/bugpoint-passes/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/tools/llc/BUILD.gn                 | 1 +
 llvm/utils/gn/secondary/llvm/tools/lli/BUILD.gn                 | 1 +
 llvm/utils/gn/secondary/llvm/tools/lli/ChildTarget/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-ar/BUILD.gn             | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-as/BUILD.gn             | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-bcanalyzer/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-cat/BUILD.gn            | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-cfi-verify/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-config/BUILD.gn         | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-cvtres/BUILD.gn         | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-cxxfilt/BUILD.gn        | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-cxxmap/BUILD.gn         | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-dis/BUILD.gn            | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/BUILD.gn       | 1 +
 .../gn/secondary/llvm/tools/llvm-exegesis/lib/AArch64/BUILD.gn  | 1 +
 .../gn/secondary/llvm/tools/llvm-exegesis/lib/Mips/BUILD.gn     | 1 +
 .../gn/secondary/llvm/tools/llvm-exegesis/lib/PowerPC/BUILD.gn  | 1 +
 .../gn/secondary/llvm/tools/llvm-exegesis/lib/X86/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-extract/BUILD.gn        | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-ifs/BUILD.gn            | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-isel-fuzzer/BUILD.gn    | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-link/BUILD.gn           | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-lipo/BUILD.gn           | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-lto/BUILD.gn            | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-lto2/BUILD.gn           | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-modextract/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-mt/BUILD.gn             | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-nm/BUILD.gn             | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-opt-fuzzer/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-opt-report/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-profdata/BUILD.gn       | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-rtdyld/BUILD.gn         | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-size/BUILD.gn           | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-split/BUILD.gn          | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-strings/BUILD.gn        | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-symbolizer/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/tools/llvm-undname/BUILD.gn        | 1 +
 llvm/utils/gn/secondary/llvm/tools/sancov/BUILD.gn              | 1 +
 llvm/utils/gn/secondary/llvm/tools/sanstats/BUILD.gn            | 1 +
 llvm/utils/gn/secondary/llvm/tools/verify-uselistorder/BUILD.gn | 1 +
 llvm/utils/gn/secondary/llvm/tools/yaml2obj/BUILD.gn            | 1 +
 llvm/utils/gn/secondary/llvm/unittests/AsmParser/BUILD.gn       | 1 +
 llvm/utils/gn/secondary/llvm/unittests/DebugInfo/GSYM/BUILD.gn  | 1 +
 llvm/utils/gn/secondary/llvm/unittests/ExecutionEngine/BUILD.gn | 1 +
 .../secondary/llvm/unittests/ExecutionEngine/JITLink/BUILD.gn   | 1 +
 llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn        | 1 +
 llvm/utils/gn/secondary/llvm/unittests/LineEditor/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/unittests/Linker/BUILD.gn          | 1 +
 llvm/utils/gn/secondary/llvm/unittests/MI/BUILD.gn              | 1 +
 llvm/utils/gn/secondary/llvm/unittests/Option/BUILD.gn          | 1 +
 llvm/utils/gn/secondary/llvm/unittests/Passes/BUILD.gn          | 2 ++
 .../gn/secondary/llvm/unittests/Support/DynamicLibrary/BUILD.gn | 1 +
 llvm/utils/gn/secondary/llvm/unittests/Target/ARM/BUILD.gn      | 1 +
 .../gn/secondary/llvm/unittests/Target/WebAssembly/BUILD.gn     | 1 +
 llvm/utils/gn/secondary/llvm/unittests/Target/X86/BUILD.gn      | 1 +
 .../llvm/unittests/tools/llvm-exegesis/AArch64/BUILD.gn         | 1 +
 .../secondary/llvm/unittests/tools/llvm-exegesis/ARM/BUILD.gn   | 1 +
 llvm/utils/gn/secondary/llvm/utils/FileCheck/BUILD.gn           | 1 +
 llvm/utils/gn/secondary/llvm/utils/count/BUILD.gn               | 1 +
 llvm/utils/gn/secondary/llvm/utils/not/BUILD.gn                 | 1 +
 .../gn/secondary/llvm/utils/unittest/UnitTestMain/BUILD.gn      | 1 +
 llvm/utils/gn/secondary/llvm/utils/yaml-bench/BUILD.gn          | 1 +
 173 files changed, 176 insertions(+)

diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-apply-replacements/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-apply-replacements/BUILD.gn
index 46dc488f243f0..81d339cf5c08d 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-apply-replacements/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-apply-replacements/BUILD.gn
@@ -11,6 +11,7 @@ static_library("clang-apply-replacements") {
   ]
   include_dirs = [ "include" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "lib/Tooling/ApplyReplacements.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-apply-replacements/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-apply-replacements/tool/BUILD.gn
index 06d2f392a45f2..f703f9ac0c6e5 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-apply-replacements/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-apply-replacements/tool/BUILD.gn
@@ -11,6 +11,7 @@ executable("clang-apply-replacements") {
   ]
   include_dirs = [ "../include" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangApplyReplacementsMain.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-change-namespace/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-change-namespace/BUILD.gn
index 70769f185fded..982f1d4cec815 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-change-namespace/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-change-namespace/BUILD.gn
@@ -14,6 +14,7 @@ static_library("clang-change-namespace") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ChangeNamespace.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-change-namespace/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-change-namespace/tool/BUILD.gn
index 5938e1a25a492..b52c6f85d6e22 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-change-namespace/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-change-namespace/tool/BUILD.gn
@@ -14,6 +14,7 @@ executable("clang-change-namespace") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangChangeNamespace.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-doc/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-doc/tool/BUILD.gn
index 263f42f54cd05..c3a84bbc2d880 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-doc/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-doc/tool/BUILD.gn
@@ -11,6 +11,7 @@ executable("clang-doc") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangDocMain.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/find-all-symbols/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/find-all-symbols/tool/BUILD.gn
index cca711646744d..b4bada949598c 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/find-all-symbols/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/find-all-symbols/tool/BUILD.gn
@@ -12,6 +12,7 @@ executable("find-all-symbols") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "FindAllSymbolsMain.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/plugin/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/plugin/BUILD.gn
index ce4617556bffa..7dc9b25aff57b 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/plugin/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/plugin/BUILD.gn
@@ -13,6 +13,7 @@ static_library("plugin") {
   ]
 
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "IncludeFixerPlugin.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/tool/BUILD.gn
index 01b0861d28afe..a1e9a92ff9adb 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-include-fixer/tool/BUILD.gn
@@ -13,6 +13,7 @@ executable("clang-include-fixer") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangIncludeFixer.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-move/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-move/tool/BUILD.gn
index 505462c984307..611d82de48fdb 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-move/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-move/tool/BUILD.gn
@@ -14,6 +14,7 @@ executable("clang-move") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangMove.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-query/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-query/tool/BUILD.gn
index 9d0497ca883ea..0000e0abb1129 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-query/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-query/tool/BUILD.gn
@@ -12,6 +12,7 @@ executable("clang-query") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangQuery.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/BUILD.gn
index bb6e0ad556366..4b4c2c3206641 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/BUILD.gn
@@ -12,6 +12,7 @@ static_library("clang-reorder-fields") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ReorderFieldsAction.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/tool/BUILD.gn
index 405dcaaaf16d6..5c16dd206adce 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/tool/BUILD.gn
@@ -10,6 +10,7 @@ executable("clang-reorder-fields") {
     "//clang/lib/Tooling/Core",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangReorderFields.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/plugin/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/plugin/BUILD.gn
index 4f635adb96837..f3a830503b50b 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/plugin/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/plugin/BUILD.gn
@@ -13,6 +13,7 @@ static_library("plugin") {
   ]
 
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangTidyPlugin.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/tool/BUILD.gn
index 43c7fbbfd0647..25e84336a9430 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/tool/BUILD.gn
@@ -14,6 +14,7 @@ executable("clang-tidy") {
     "//llvm/lib/Target:AllTargetsInfos",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangTidyMain.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clangd/index/dex/dexp/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clangd/index/dex/dexp/BUILD.gn
index 77f1ca433bb97..f86b16f061a90 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clangd/index/dex/dexp/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clangd/index/dex/dexp/BUILD.gn
@@ -8,6 +8,7 @@ executable("dexp") {
   ]
   include_dirs = [ "../../.." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "Dexp.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clangd/indexer/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clangd/indexer/BUILD.gn
index 52466efafd93f..504b00c5808f5 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clangd/indexer/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clangd/indexer/BUILD.gn
@@ -12,6 +12,7 @@ executable("clangd-indexer") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "IndexerMain.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clangd/tool/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clangd/tool/BUILD.gn
index d1832b3797cf9..94047e3997d74 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clangd/tool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clangd/tool/BUILD.gn
@@ -26,6 +26,7 @@ executable("clangd") {
 
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangdMain.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clangd/unittests/xpc/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clangd/unittests/xpc/BUILD.gn
index 2d20e167173d2..bf373e351836b 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clangd/unittests/xpc/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clangd/unittests/xpc/BUILD.gn
@@ -10,6 +10,7 @@ unittest("ClangdXpcTests") {
   ]
   include_dirs = [ "//clang-tools-extra/clangd" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ConversionTests.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/BUILD.gn
index f8e11866639a1..79b9c238f291e 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/BUILD.gn
@@ -7,6 +7,7 @@ static_library("conversions") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "Conversion.cpp",
   ]
 }
@@ -21,6 +22,7 @@ static_library("transport") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "XPCTransport.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/framework/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/framework/BUILD.gn
index 9b11f265da36e..83cc929dcd995 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/framework/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/framework/BUILD.gn
@@ -84,6 +84,7 @@ shared_library("ClangdXPCLib") {
     "//clang-tools-extra/clangd/tool:clangd",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangdXPC.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/test-client/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/test-client/BUILD.gn
index e800590f6034d..40f3aff911a0a 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/test-client/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clangd/xpc/test-client/BUILD.gn
@@ -15,6 +15,7 @@ executable("clangd-xpc-test-client") {
 
   include_dirs = [ "../.." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangdXPCTestClient.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-apply-replacements/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-apply-replacements/BUILD.gn
index 4c0a4aa2f4874..4582a978899df 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-apply-replacements/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-apply-replacements/BUILD.gn
@@ -10,6 +10,7 @@ unittest("ClangApplyReplacementsTests") {
   ]
   include_dirs = [ "//clang-tools-extra/clang-apply-replacements/include" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ApplyReplacementsTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-change-namespace/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-change-namespace/BUILD.gn
index 392ddf2a2362a..2b6123ee10505 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-change-namespace/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-change-namespace/BUILD.gn
@@ -22,6 +22,7 @@ unittest("ClangChangeNamespaceTests") {
     "//clang",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ChangeNamespaceTests.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/BUILD.gn
index 79605904792ae..47f23186d10d4 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/BUILD.gn
@@ -15,6 +15,7 @@ unittest("FindAllSymbolsTests") {
   ]
   include_dirs = [ "//clang-tools-extra/clang-include-fixer/find-all-symbols" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "FindAllSymbolsTests.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-move/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-move/BUILD.gn
index 95246f480bf1b..217c820c8409a 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-move/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/unittests/clang-move/BUILD.gn
@@ -22,6 +22,7 @@ unittest("ClangMoveTests") {
     "//clang",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangMoveTests.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/lib/CrossTU/BUILD.gn b/llvm/utils/gn/secondary/clang/lib/CrossTU/BUILD.gn
index 81fb0b688911a..83411bac3eada 100644
--- a/llvm/utils/gn/secondary/clang/lib/CrossTU/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/lib/CrossTU/BUILD.gn
@@ -9,6 +9,7 @@ static_library("CrossTU") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "CrossTranslationUnit.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/lib/FrontendTool/BUILD.gn b/llvm/utils/gn/secondary/clang/lib/FrontendTool/BUILD.gn
index 6bcb4c320097a..cd78388850675 100644
--- a/llvm/utils/gn/secondary/clang/lib/FrontendTool/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/lib/FrontendTool/BUILD.gn
@@ -24,6 +24,7 @@ static_library("FrontendTool") {
     deps += [ "//clang/lib/StaticAnalyzer/Frontend" ]
   }
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ExecuteCompilerInvocation.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/lib/Tooling/ASTDiff/BUILD.gn b/llvm/utils/gn/secondary/clang/lib/Tooling/ASTDiff/BUILD.gn
index 0058a26ca0881..e563d444b7dca 100644
--- a/llvm/utils/gn/secondary/clang/lib/Tooling/ASTDiff/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/lib/Tooling/ASTDiff/BUILD.gn
@@ -8,6 +8,7 @@ static_library("ASTDiff") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ASTDiff.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/arcmt-test/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/arcmt-test/BUILD.gn
index c16ce2a6b7a04..433ab82d08f88 100644
--- a/llvm/utils/gn/secondary/clang/tools/arcmt-test/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/arcmt-test/BUILD.gn
@@ -8,6 +8,7 @@ executable("arcmt-test") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "arcmt-test.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/c-arcmt-test/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/c-arcmt-test/BUILD.gn
index 2c77f7aac917c..eb45957607052 100644
--- a/llvm/utils/gn/secondary/clang/tools/c-arcmt-test/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/c-arcmt-test/BUILD.gn
@@ -4,6 +4,7 @@ executable("c-arcmt-test") {
     "//clang/tools/libclang",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "c-arcmt-test.c",
   ]
 
diff --git a/llvm/utils/gn/secondary/clang/tools/clang-check/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-check/BUILD.gn
index 3d18b14949e50..4bd97efdc69ec 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-check/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-check/BUILD.gn
@@ -13,6 +13,7 @@ executable("clang-check") {
     "//llvm/lib/Target:TargetsToBuild",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangCheck.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/clang-diff/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-diff/BUILD.gn
index c68cd29b43d1f..66396992f2412 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-diff/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-diff/BUILD.gn
@@ -8,6 +8,7 @@ executable("clang-diff") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangDiff.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/clang-extdef-mapping/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-extdef-mapping/BUILD.gn
index 68b3af406e5db..1fb36e5dae6b2 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-extdef-mapping/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-extdef-mapping/BUILD.gn
@@ -12,6 +12,7 @@ executable("clang-extdef-mapping") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangExtDefMapGen.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/clang-format/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-format/BUILD.gn
index d7e2346c59148..63e1618981075 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-format/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-format/BUILD.gn
@@ -9,6 +9,7 @@ executable("clang-format") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangFormat.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/clang-import-test/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-import-test/BUILD.gn
index 60a8a66dda00a..e169fbd93ca5b 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-import-test/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-import-test/BUILD.gn
@@ -12,6 +12,7 @@ executable("clang-import-test") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "clang-import-test.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/clang-offload-bundler/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-offload-bundler/BUILD.gn
index 4335087b53d16..25d077ed63839 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-offload-bundler/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-offload-bundler/BUILD.gn
@@ -8,6 +8,7 @@ executable("clang-offload-bundler") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangOffloadBundler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/clang-offload-wrapper/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-offload-wrapper/BUILD.gn
index bf1b38edba191..071f2fc518d2f 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-offload-wrapper/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-offload-wrapper/BUILD.gn
@@ -8,6 +8,7 @@ executable("clang-offload-wrapper") {
     "//llvm/lib/Transforms/Utils",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangOffloadWrapper.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/clang-rename/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-rename/BUILD.gn
index ad08ec1daf47d..e3f236fe7cef6 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-rename/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-rename/BUILD.gn
@@ -11,6 +11,7 @@ executable("clang-rename") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangRename.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/tools/clang-scan-deps/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-scan-deps/BUILD.gn
index 8a151a4474d86..2650be873cde9 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-scan-deps/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-scan-deps/BUILD.gn
@@ -16,6 +16,7 @@ executable("clang-scan-deps") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ClangScanDeps.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/unittests/CrossTU/BUILD.gn b/llvm/utils/gn/secondary/clang/unittests/CrossTU/BUILD.gn
index 6330f30057952..b8bf5b0373f23 100644
--- a/llvm/utils/gn/secondary/clang/unittests/CrossTU/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/unittests/CrossTU/BUILD.gn
@@ -12,6 +12,7 @@ unittest("CrossTUTests") {
     "//llvm/lib/Target:TargetsToBuild",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "CrossTranslationUnitTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/unittests/Index/BUILD.gn b/llvm/utils/gn/secondary/clang/unittests/Index/BUILD.gn
index c2e6395f3772e..6060313869a83 100644
--- a/llvm/utils/gn/secondary/clang/unittests/Index/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/unittests/Index/BUILD.gn
@@ -13,6 +13,7 @@ unittest("IndexTests") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "IndexTests.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/unittests/Serialization/BUILD.gn b/llvm/utils/gn/secondary/clang/unittests/Serialization/BUILD.gn
index 5c253827bd8d2..242603ae41414 100644
--- a/llvm/utils/gn/secondary/clang/unittests/Serialization/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/unittests/Serialization/BUILD.gn
@@ -12,6 +12,7 @@ unittest("SerializationTests") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "InMemoryModuleCacheTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/unittests/libclang/BUILD.gn b/llvm/utils/gn/secondary/clang/unittests/libclang/BUILD.gn
index cd99640423f97..c1d94a3d0a3d9 100644
--- a/llvm/utils/gn/secondary/clang/unittests/libclang/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/unittests/libclang/BUILD.gn
@@ -6,6 +6,7 @@ unittest("libclangTests") {
     "//clang/tools/libclang",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LibclangTest.cpp",
   ]
   if (host_os == "mac") {
diff --git a/llvm/utils/gn/secondary/clang/unittests/libclang/CrashTests/BUILD.gn b/llvm/utils/gn/secondary/clang/unittests/libclang/CrashTests/BUILD.gn
index 05ce1ecda4c64..3b0adabcdc24d 100644
--- a/llvm/utils/gn/secondary/clang/unittests/libclang/CrashTests/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/unittests/libclang/CrashTests/BUILD.gn
@@ -6,6 +6,7 @@ unittest("libclangCrashTests") {
     "//clang/tools/libclang",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LibclangCrashTest.cpp",
   ]
   if (host_os == "mac") {
diff --git a/llvm/utils/gn/secondary/compiler-rt/lib/cfi/BUILD.gn b/llvm/utils/gn/secondary/compiler-rt/lib/cfi/BUILD.gn
index 0db8fca16a936..16d8b113c7cea 100644
--- a/llvm/utils/gn/secondary/compiler-rt/lib/cfi/BUILD.gn
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/cfi/BUILD.gn
@@ -4,6 +4,7 @@ source_set("sources") {
   configs -= [ "//llvm/utils/gn/build:llvm_code" ]
   configs += [ "//llvm/utils/gn/build:crt_code" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "cfi.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/compiler-rt/lib/hwasan/BUILD.gn b/llvm/utils/gn/secondary/compiler-rt/lib/hwasan/BUILD.gn
index de7fe18db349d..6994b75fd0c72 100644
--- a/llvm/utils/gn/secondary/compiler-rt/lib/hwasan/BUILD.gn
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/hwasan/BUILD.gn
@@ -75,6 +75,7 @@ source_set("cxx_sources") {
     "//compiler-rt/lib/ubsan:cxx_sources",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "hwasan_new_delete.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn b/llvm/utils/gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn
index c5d9ab6083237..a972794d8c12f 100644
--- a/llvm/utils/gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn
@@ -172,6 +172,7 @@ source_set("nolibc_sources") {
     "//llvm/utils/gn/build/libs/pthread",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "sanitizer_common_nolibc.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/compiler-rt/lib/scudo/standalone/BUILD.gn b/llvm/utils/gn/secondary/compiler-rt/lib/scudo/standalone/BUILD.gn
index 245ba18643abe..14bff487fff5a 100644
--- a/llvm/utils/gn/secondary/compiler-rt/lib/scudo/standalone/BUILD.gn
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/scudo/standalone/BUILD.gn
@@ -60,6 +60,7 @@ source_set("c_wrapper_sources") {
   configs -= [ "//llvm/utils/gn/build:llvm_code" ]
   configs += [ "//llvm/utils/gn/build:crt_code" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "wrappers_c.cpp",
   ]
 
@@ -70,6 +71,7 @@ source_set("cxx_wrapper_sources") {
   configs -= [ "//llvm/utils/gn/build:llvm_code" ]
   configs += [ "//llvm/utils/gn/build:crt_code" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "wrappers_cpp.cpp",
   ]
 
diff --git a/llvm/utils/gn/secondary/compiler-rt/lib/scudo/standalone/benchmarks/BUILD.gn b/llvm/utils/gn/secondary/compiler-rt/lib/scudo/standalone/benchmarks/BUILD.gn
index bed9e3dca7cfb..d23535ab82d11 100644
--- a/llvm/utils/gn/secondary/compiler-rt/lib/scudo/standalone/benchmarks/BUILD.gn
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/scudo/standalone/benchmarks/BUILD.gn
@@ -1,6 +1,7 @@
 executable("ScudoBenchmarks") {
   configs += [ "//llvm/utils/gn/build:crt_code" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "malloc_benchmark.cpp",
   ]
   deps = [
diff --git a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
index ea15963bf5602..f91b29cc390ee 100644
--- a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
@@ -280,6 +280,7 @@ if (libcxx_enable_experimental) {
     output_name = "c++experimental"
     cflags_cc = [ "-std=c++14" ]
     sources = [
+      # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
       "experimental/memory_resource.cpp",
     ]
     configs += [ ":cxx_config" ]
diff --git a/llvm/utils/gn/secondary/lld/MinGW/BUILD.gn b/llvm/utils/gn/secondary/lld/MinGW/BUILD.gn
index 4f3d5164d0639..66dbd56420766 100644
--- a/llvm/utils/gn/secondary/lld/MinGW/BUILD.gn
+++ b/llvm/utils/gn/secondary/lld/MinGW/BUILD.gn
@@ -16,6 +16,7 @@ static_library("MinGW") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "Driver.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/lld/lib/Driver/BUILD.gn b/llvm/utils/gn/secondary/lld/lib/Driver/BUILD.gn
index 10a3e6abc3ecb..a78ea8a57ba3f 100644
--- a/llvm/utils/gn/secondary/lld/lib/Driver/BUILD.gn
+++ b/llvm/utils/gn/secondary/lld/lib/Driver/BUILD.gn
@@ -19,6 +19,7 @@ static_library("Driver") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "DarwinLdDriver.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/lld/lib/ReaderWriter/BUILD.gn b/llvm/utils/gn/secondary/lld/lib/ReaderWriter/BUILD.gn
index 0ca483a5e7a01..92c2b9d935af8 100644
--- a/llvm/utils/gn/secondary/lld/lib/ReaderWriter/BUILD.gn
+++ b/llvm/utils/gn/secondary/lld/lib/ReaderWriter/BUILD.gn
@@ -7,6 +7,7 @@ static_library("ReaderWriter") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "FileArchive.cpp",
   ]
 
diff --git a/llvm/utils/gn/secondary/lld/lib/ReaderWriter/YAML/BUILD.gn b/llvm/utils/gn/secondary/lld/lib/ReaderWriter/YAML/BUILD.gn
index 9fb1479d03918..97fe87743ef5b 100644
--- a/llvm/utils/gn/secondary/lld/lib/ReaderWriter/YAML/BUILD.gn
+++ b/llvm/utils/gn/secondary/lld/lib/ReaderWriter/YAML/BUILD.gn
@@ -6,6 +6,7 @@ static_library("YAML") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ReaderWriterYAML.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/lld/tools/lld/BUILD.gn b/llvm/utils/gn/secondary/lld/tools/lld/BUILD.gn
index c7e90e50f089c..6f0771b8d87df 100644
--- a/llvm/utils/gn/secondary/lld/tools/lld/BUILD.gn
+++ b/llvm/utils/gn/secondary/lld/tools/lld/BUILD.gn
@@ -35,6 +35,7 @@ executable("lld") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "lld.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/lld/unittests/DriverTests/BUILD.gn b/llvm/utils/gn/secondary/lld/unittests/DriverTests/BUILD.gn
index b683c3507a2d1..9768c6ffa2488 100644
--- a/llvm/utils/gn/secondary/lld/unittests/DriverTests/BUILD.gn
+++ b/llvm/utils/gn/secondary/lld/unittests/DriverTests/BUILD.gn
@@ -7,6 +7,7 @@ unittest("DriverTests") {
     "//lld/lib/ReaderWriter/MachO",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "DarwinLdDriverTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Bitstream/Reader/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Bitstream/Reader/BUILD.gn
index 302ae2be536cb..e3a23ac1c3183 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Bitstream/Reader/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Bitstream/Reader/BUILD.gn
@@ -5,6 +5,7 @@ static_library("Reader") {
   ]
 
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "BitstreamReader.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/ExecutionEngine/MCJIT/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/ExecutionEngine/MCJIT/BUILD.gn
index 9d686cebdad53..35c7b3b35ec9a 100644
--- a/llvm/utils/gn/secondary/llvm/lib/ExecutionEngine/MCJIT/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/ExecutionEngine/MCJIT/BUILD.gn
@@ -9,6 +9,7 @@ static_library("MCJIT") {
     "//llvm/lib/Target",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "MCJIT.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/IRReader/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/IRReader/BUILD.gn
index 1310f3581261f..aa9458638b0ba 100644
--- a/llvm/utils/gn/secondary/llvm/lib/IRReader/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/IRReader/BUILD.gn
@@ -7,6 +7,7 @@ static_library("IRReader") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "IRReader.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/LineEditor/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/LineEditor/BUILD.gn
index b8f618533bc12..77d80eb055a4d 100644
--- a/llvm/utils/gn/secondary/llvm/lib/LineEditor/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/LineEditor/BUILD.gn
@@ -7,6 +7,7 @@ static_library("LineEditor") {
   ]
 
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LineEditor.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/AsmParser/BUILD.gn
index 588ac6f34bab6..902fbfa3eedd0 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/AsmParser/BUILD.gn
@@ -22,6 +22,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AArch64AsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/TargetInfo/BUILD.gn
index 25565c216a9bc..f396040116d34 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AArch64TargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/Utils/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/Utils/BUILD.gn
index c680c769ad29c..0236bcae0a524 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/Utils/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AArch64/Utils/BUILD.gn
@@ -23,6 +23,7 @@ static_library("Utils") {
   # AArch64BaseInfo.h includes a header from MCTargetDesc :-/
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AArch64BaseInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/AsmParser/BUILD.gn
index 39fedb149c565..d707b2633b82c 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/AsmParser/BUILD.gn
@@ -19,6 +19,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AMDGPUAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/Disassembler/BUILD.gn
index 8a536b1669b5c..fc647321af429 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/Disassembler/BUILD.gn
@@ -19,6 +19,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AMDGPUDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/TargetInfo/BUILD.gn
index 57d751b5ccdd1..14101cc3eb7a8 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AMDGPUTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/ARM/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/ARM/AsmParser/BUILD.gn
index 9b6dd6401ddc6..02088e110713a 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/ARM/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/ARM/AsmParser/BUILD.gn
@@ -19,6 +19,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ARMAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/ARM/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/ARM/Disassembler/BUILD.gn
index bfe5e50c5943f..1105625b753e5 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/ARM/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/ARM/Disassembler/BUILD.gn
@@ -18,6 +18,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ARMDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/ARM/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/ARM/TargetInfo/BUILD.gn
index b6c3b6594f874..c9f370a927ab7 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/ARM/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/ARM/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ARMTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/ARM/Utils/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/ARM/Utils/BUILD.gn
index fc541fa026fdf..1be8846e7491c 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/ARM/Utils/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/ARM/Utils/BUILD.gn
@@ -24,6 +24,7 @@ static_library("Utils") {
   # https://reviews.llvm.org/D35209#1075113 :-/
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ARMBaseInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AVR/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AVR/AsmParser/BUILD.gn
index 6a99c37c01aa5..91bf7b61730ba 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AVR/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AVR/AsmParser/BUILD.gn
@@ -18,6 +18,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AVRAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AVR/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AVR/Disassembler/BUILD.gn
index ce678f9a7e883..8857fb84a0944 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AVR/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AVR/Disassembler/BUILD.gn
@@ -18,6 +18,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AVRDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AVR/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AVR/TargetInfo/BUILD.gn
index e069cac242f31..077e0d58e12ab 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AVR/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AVR/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AVRTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/BPF/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/BPF/AsmParser/BUILD.gn
index bc6e7ab9bf01a..bd8a77cd00e3e 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/BPF/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/BPF/AsmParser/BUILD.gn
@@ -18,6 +18,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "BPFAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/BPF/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/BPF/Disassembler/BUILD.gn
index 1ee3bc70ba75a..3f7dc38e858c8 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/BPF/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/BPF/Disassembler/BUILD.gn
@@ -17,6 +17,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "BPFDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/BPF/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/BPF/TargetInfo/BUILD.gn
index bb509630e0847..1af828eb91ea7 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/BPF/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/BPF/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "BPFTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/AsmParser/BUILD.gn
index fa8b624713fbf..326f3e53ee999 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/AsmParser/BUILD.gn
@@ -17,6 +17,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "HexagonAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/Disassembler/BUILD.gn
index 26ce3d2cff131..012ddb28c78c7 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/Disassembler/BUILD.gn
@@ -17,6 +17,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "HexagonDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/TargetInfo/BUILD.gn
index d12eeb40a27b3..fa41fc71967c5 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Hexagon/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "HexagonTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/AsmParser/BUILD.gn
index 5ab14fc70fe99..82af0bd42081d 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/AsmParser/BUILD.gn
@@ -17,6 +17,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LanaiAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/Disassembler/BUILD.gn
index ce0412235b5ea..35541f42ea46a 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/Disassembler/BUILD.gn
@@ -17,6 +17,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LanaiDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/TargetInfo/BUILD.gn
index 54f23dc3f6451..d979507be6553 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Lanai/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LanaiTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Mips/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Mips/AsmParser/BUILD.gn
index f4ec60de0f7f3..55676914e7f2e 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Mips/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Mips/AsmParser/BUILD.gn
@@ -18,6 +18,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "MipsAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Mips/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Mips/Disassembler/BUILD.gn
index efc708eac2c8a..6552a208ce3cb 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Mips/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Mips/Disassembler/BUILD.gn
@@ -17,6 +17,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "MipsDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Mips/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Mips/TargetInfo/BUILD.gn
index 6706425eeaa7a..7562f63ac8b51 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Mips/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Mips/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "MipsTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/NVPTX/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/NVPTX/TargetInfo/BUILD.gn
index ab1053f51bd98..29cdcc6612aa2 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/NVPTX/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/NVPTX/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "NVPTXTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/AsmParser/BUILD.gn
index 28c8945ca0fe1..a1197f09c67d1 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/AsmParser/BUILD.gn
@@ -18,6 +18,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "PPCAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/Disassembler/BUILD.gn
index 3b5febf9d8e6c..b8ca1c2c8f813 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/Disassembler/BUILD.gn
@@ -17,6 +17,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "PPCDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/TargetInfo/BUILD.gn
index 405e442c53b80..a9216fa4ac7e9 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "PowerPCTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/AsmParser/BUILD.gn
index fd664ac692a94..84e802f67060a 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/AsmParser/BUILD.gn
@@ -22,6 +22,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "RISCVAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/Disassembler/BUILD.gn
index 442561022ddbb..c0f27d5143e61 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/Disassembler/BUILD.gn
@@ -17,6 +17,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "RISCVDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/TargetInfo/BUILD.gn
index 536053fe63a77..879b2aefc8748 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "RISCVTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/AsmParser/BUILD.gn
index aaae105d87268..35d1c68c1405e 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/AsmParser/BUILD.gn
@@ -17,6 +17,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "SparcAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/Disassembler/BUILD.gn
index 22a712d4d04ce..08c5d3bb64afa 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/Disassembler/BUILD.gn
@@ -16,6 +16,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "SparcDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/TargetInfo/BUILD.gn
index 6dbac501bb8ec..ed714fc9d6fa2 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/Sparc/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "SparcTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/AsmParser/BUILD.gn
index e9ece3130ba2d..5d4e9b0348bad 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/AsmParser/BUILD.gn
@@ -18,6 +18,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "SystemZAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/Disassembler/BUILD.gn
index 6a06cf9f315cb..69c009b04d42a 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/Disassembler/BUILD.gn
@@ -18,6 +18,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "SystemZDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/TargetInfo/BUILD.gn
index 35754fceb5eb8..e8867a1e3b603 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "SystemZTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/AsmParser/BUILD.gn
index 158f9e97fd847..43df7fd9eaa1f 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/AsmParser/BUILD.gn
@@ -18,6 +18,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "WebAssemblyAsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/Disassembler/BUILD.gn
index 44e586dbdd79f..40babbb99be08 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/Disassembler/BUILD.gn
@@ -18,6 +18,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "WebAssemblyDisassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/TargetInfo/BUILD.gn
index 63f5ca1afa2f2..4cd78b9e9959a 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/WebAssembly/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "WebAssemblyTargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/X86/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/X86/AsmParser/BUILD.gn
index 16124f6f0ce6a..7a33e0cf1ea2a 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/X86/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/X86/AsmParser/BUILD.gn
@@ -18,6 +18,7 @@ static_library("AsmParser") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "X86AsmParser.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/X86/Disassembler/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/X86/Disassembler/BUILD.gn
index 89b2be7ffe2a9..27d2532c0f04c 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/X86/Disassembler/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/X86/Disassembler/BUILD.gn
@@ -17,6 +17,7 @@ static_library("Disassembler") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "X86Disassembler.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/X86/TargetInfo/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/X86/TargetInfo/BUILD.gn
index 16588757b195d..67baf8e316c56 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/X86/TargetInfo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/X86/TargetInfo/BUILD.gn
@@ -5,6 +5,7 @@ static_library("TargetInfo") {
   ]
   include_dirs = [ ".." ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "X86TargetInfo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/X86/Utils/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/X86/Utils/BUILD.gn
index 6faf11c6a899a..9567685bc127f 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/X86/Utils/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/X86/Utils/BUILD.gn
@@ -4,6 +4,7 @@ static_library("Utils") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "X86ShuffleDecode.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/ToolDrivers/llvm-dlltool/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/ToolDrivers/llvm-dlltool/BUILD.gn
index b5d5a61c06aaa..0067352f7afff 100644
--- a/llvm/utils/gn/secondary/llvm/lib/ToolDrivers/llvm-dlltool/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/ToolDrivers/llvm-dlltool/BUILD.gn
@@ -14,6 +14,7 @@ static_library("DlltoolDriver") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "DlltoolDriver.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/ToolDrivers/llvm-lib/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/ToolDrivers/llvm-lib/BUILD.gn
index caa73ef3c8bb7..7f88948e4829c 100644
--- a/llvm/utils/gn/secondary/llvm/lib/ToolDrivers/llvm-lib/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/ToolDrivers/llvm-lib/BUILD.gn
@@ -16,6 +16,7 @@ static_library("LibDriver") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LibDriver.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Transforms/CFGuard/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Transforms/CFGuard/BUILD.gn
index c6835096e0ad7..173c55669fef3 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Transforms/CFGuard/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Transforms/CFGuard/BUILD.gn
@@ -5,6 +5,7 @@ static_library("CFGuard") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "CFGuard.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/lib/Transforms/Hello/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Transforms/Hello/BUILD.gn
index 9e5557840c080..06c5c85e4ae1e 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Transforms/Hello/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Transforms/Hello/BUILD.gn
@@ -8,6 +8,7 @@ loadable_module("Hello") {
     "//llvm/include/llvm/IR:public_tablegen",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "Hello.cpp",
   ]
 
diff --git a/llvm/utils/gn/secondary/llvm/lib/WindowsManifest/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/WindowsManifest/BUILD.gn
index d4c23c97397db..00f8fbd9d829e 100644
--- a/llvm/utils/gn/secondary/llvm/lib/WindowsManifest/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/WindowsManifest/BUILD.gn
@@ -6,6 +6,7 @@ static_library("WindowsManifest") {
     "//llvm/utils/gn/build/libs/xml",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "WindowsManifestMerger.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/bugpoint-passes/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/bugpoint-passes/BUILD.gn
index 260c3909b6006..49c2fc81c8f5a 100644
--- a/llvm/utils/gn/secondary/llvm/tools/bugpoint-passes/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/bugpoint-passes/BUILD.gn
@@ -8,6 +8,7 @@ loadable_module("bugpoint-passes") {
     "//llvm/include/llvm/IR:public_tablegen",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "TestPasses.cpp",
   ]
 
diff --git a/llvm/utils/gn/secondary/llvm/tools/llc/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llc/BUILD.gn
index 5f7aff10d993e..f8ef25ef51da3 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llc/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llc/BUILD.gn
@@ -16,6 +16,7 @@ executable("llc") {
     "//llvm/lib/Transforms/Vectorize",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llc.cpp",
   ]
 
diff --git a/llvm/utils/gn/secondary/llvm/tools/lli/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/lli/BUILD.gn
index 171e0dd87c93d..a9af1cf3ca8ae 100644
--- a/llvm/utils/gn/secondary/llvm/tools/lli/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/lli/BUILD.gn
@@ -20,6 +20,7 @@ executable("lli") {
     "//llvm/lib/Transforms/Utils",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "lli.cpp",
   ]
   if (host_os != "mac" && host_os != "win") {
diff --git a/llvm/utils/gn/secondary/llvm/tools/lli/ChildTarget/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/lli/ChildTarget/BUILD.gn
index 6203b2a79453b..ccea542bd0d83 100644
--- a/llvm/utils/gn/secondary/llvm/tools/lli/ChildTarget/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/lli/ChildTarget/BUILD.gn
@@ -5,6 +5,7 @@ executable("lli-child-target") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ChildTarget.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-ar/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-ar/BUILD.gn
index 969fbed688cc5..e575d0175e240 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-ar/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-ar/BUILD.gn
@@ -41,6 +41,7 @@ executable("llvm-ar") {
     "//llvm/lib/ToolDrivers/llvm-lib:LibDriver",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-ar.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-as/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-as/BUILD.gn
index 914cb9a5f4e42..3d2f20b3e1147 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-as/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-as/BUILD.gn
@@ -6,6 +6,7 @@ executable("llvm-as") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-as.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-bcanalyzer/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-bcanalyzer/BUILD.gn
index a5d7581720b08..c46350487b637 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-bcanalyzer/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-bcanalyzer/BUILD.gn
@@ -4,6 +4,7 @@ executable("llvm-bcanalyzer") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-bcanalyzer.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-cat/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-cat/BUILD.gn
index 29c717647b347..777eab91c0b45 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-cat/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-cat/BUILD.gn
@@ -7,6 +7,7 @@ executable("llvm-cat") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-cat.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-cfi-verify/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-cfi-verify/BUILD.gn
index 2f0c08cd7eaaa..69d13f1688b97 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-cfi-verify/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-cfi-verify/BUILD.gn
@@ -12,6 +12,7 @@ executable("llvm-cfi-verify") {
     "//llvm/lib/Target:AllTargetsInfos",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-cfi-verify.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-config/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-config/BUILD.gn
index c4fc77a6b4a8c..d3c4aa4054dc1 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-config/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-config/BUILD.gn
@@ -118,6 +118,7 @@ executable("llvm-config") {
   # To pick up the generated inc files.
   include_dirs = [ "$target_gen_dir" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-config.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-cvtres/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-cvtres/BUILD.gn
index 77d410d2df8db..a621bd8b2d04f 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-cvtres/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-cvtres/BUILD.gn
@@ -13,6 +13,7 @@ executable("llvm-cvtres") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-cvtres.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-cxxfilt/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-cxxfilt/BUILD.gn
index 37e7ebd8846d1..e20e5869a9ae2 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-cxxfilt/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-cxxfilt/BUILD.gn
@@ -27,6 +27,7 @@ executable("llvm-cxxfilt") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-cxxfilt.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-cxxmap/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-cxxmap/BUILD.gn
index 7cee4185badef..577ade68bae1c 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-cxxmap/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-cxxmap/BUILD.gn
@@ -5,6 +5,7 @@ executable("llvm-cxxmap") {
     "//llvm/lib/Target:TargetsToBuild",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-cxxmap.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-dis/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-dis/BUILD.gn
index c0c0c49c132a0..2a047e08f4895 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-dis/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-dis/BUILD.gn
@@ -5,6 +5,7 @@ executable("llvm-dis") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-dis.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/BUILD.gn
index 7b81b7e5fb878..8b8a20d51c6bf 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/BUILD.gn
@@ -10,6 +10,7 @@ executable("llvm-exegesis") {
     "//llvm/lib/Target:NativeTarget",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-exegesis.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/AArch64/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/AArch64/BUILD.gn
index ef280c67ff31f..a9b44c129644c 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/AArch64/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/AArch64/BUILD.gn
@@ -16,6 +16,7 @@ static_library("AArch64") {
     "//llvm/lib/Target/AArch64/Utils",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "Target.cpp",
   ]
   include_dirs = [ "//llvm/lib/Target/AArch64" ]
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/Mips/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/Mips/BUILD.gn
index 61d5f1ffb0f1f..afd32355c9d2e 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/Mips/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/Mips/BUILD.gn
@@ -15,6 +15,7 @@ static_library("Mips") {
     "//llvm/lib/Target/Mips/MCTargetDesc",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "Target.cpp",
   ]
   include_dirs = [ "//llvm/lib/Target/Mips" ]
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/PowerPC/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/PowerPC/BUILD.gn
index 4c4af42166f50..f2d17f07cdc95 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/PowerPC/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/PowerPC/BUILD.gn
@@ -15,6 +15,7 @@ static_library("PowerPC") {
     "//llvm/lib/Target/PowerPC/MCTargetDesc",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "Target.cpp",
   ]
   include_dirs = [ "//llvm/lib/Target/PowerPC" ]
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/X86/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/X86/BUILD.gn
index a1cb577b7961e..c93827d8cbd7d 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/X86/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/X86/BUILD.gn
@@ -15,6 +15,7 @@ static_library("X86") {
     "//llvm/lib/Target/X86/MCTargetDesc",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "Target.cpp",
   ]
   include_dirs = [ "//llvm/lib/Target/X86" ]
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-extract/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-extract/BUILD.gn
index c8699a7bd5f2e..7a45704680b6f 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-extract/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-extract/BUILD.gn
@@ -7,6 +7,7 @@ executable("llvm-extract") {
     "//llvm/lib/Transforms/IPO",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-extract.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-ifs/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-ifs/BUILD.gn
index 95b49d6f0eb5d..9edd30bda0310 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-ifs/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-ifs/BUILD.gn
@@ -6,6 +6,7 @@ executable("llvm-ifs") {
     "//llvm/lib/TextAPI",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-ifs.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-isel-fuzzer/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-isel-fuzzer/BUILD.gn
index d9ef7fcc3155a..9839b1e7bd04c 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-isel-fuzzer/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-isel-fuzzer/BUILD.gn
@@ -19,6 +19,7 @@ fuzzer("llvm-isel-fuzzer") {
   ]
   dummy_main = "DummyISelFuzzer.cpp"
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-isel-fuzzer.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-link/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-link/BUILD.gn
index 10d6783798c87..f3f65cc4572cc 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-link/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-link/BUILD.gn
@@ -11,6 +11,7 @@ executable("llvm-link") {
     "//llvm/lib/Transforms/Utils",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-link.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-lipo/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-lipo/BUILD.gn
index 28f762d500548..e431c00a3cecd 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-lipo/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-lipo/BUILD.gn
@@ -14,6 +14,7 @@ executable("llvm-lipo") {
     "//llvm/lib/Target:TargetsToBuild",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-lipo.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-lto/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-lto/BUILD.gn
index a569fd96db6fb..32ce7a51cd019 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-lto/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-lto/BUILD.gn
@@ -12,6 +12,7 @@ executable("llvm-lto") {
     "//llvm/lib/Target:TargetsToBuild",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-lto.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-lto2/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-lto2/BUILD.gn
index 9dfb231434082..04f215b7d9044 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-lto2/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-lto2/BUILD.gn
@@ -11,6 +11,7 @@ executable("llvm-lto2") {
     "//llvm/lib/Target:TargetsToBuild",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-lto2.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-modextract/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-modextract/BUILD.gn
index a8bf2d307c491..be78c93ee64a1 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-modextract/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-modextract/BUILD.gn
@@ -7,6 +7,7 @@ executable("llvm-modextract") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-modextract.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-mt/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-mt/BUILD.gn
index 7f3ea4809eb0b..cb3e36893071f 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-mt/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-mt/BUILD.gn
@@ -13,6 +13,7 @@ executable("llvm-mt") {
     "//llvm/lib/WindowsManifest",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-mt.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-nm/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-nm/BUILD.gn
index 51279d997191b..f1b40d5f935c1 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-nm/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-nm/BUILD.gn
@@ -33,6 +33,7 @@ executable("llvm-nm") {
     "//llvm/lib/Target:AllTargetsInfos",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-nm.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-opt-fuzzer/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-opt-fuzzer/BUILD.gn
index cb95dda81e817..9632777de006c 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-opt-fuzzer/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-opt-fuzzer/BUILD.gn
@@ -26,6 +26,7 @@ fuzzer("llvm-opt-fuzzer") {
   ]
   dummy_main = "DummyOptFuzzer.cpp"
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-opt-fuzzer.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-opt-report/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-opt-report/BUILD.gn
index ea21b5c8ee923..d5465bde14257 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-opt-report/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-opt-report/BUILD.gn
@@ -7,6 +7,7 @@ executable("llvm-opt-report") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "OptReport.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-profdata/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-profdata/BUILD.gn
index 748acfc8d03c2..4284d8820185e 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-profdata/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-profdata/BUILD.gn
@@ -5,6 +5,7 @@ executable("llvm-profdata") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-profdata.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-rtdyld/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-rtdyld/BUILD.gn
index 2c4d8f2a9dc24..8834068667569 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-rtdyld/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-rtdyld/BUILD.gn
@@ -9,6 +9,7 @@ executable("llvm-rtdyld") {
     "//llvm/lib/Target:TargetsToBuild",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-rtdyld.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-size/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-size/BUILD.gn
index 03bc5447b0779..0c70315c263e4 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-size/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-size/BUILD.gn
@@ -27,6 +27,7 @@ executable("llvm-size") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-size.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-split/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-split/BUILD.gn
index 375dce3b682b5..9d5751241bbf3 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-split/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-split/BUILD.gn
@@ -7,6 +7,7 @@ executable("llvm-split") {
     "//llvm/lib/Transforms/Utils",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-split.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-strings/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-strings/BUILD.gn
index dddf3a2397be1..6253c4a488d05 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-strings/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-strings/BUILD.gn
@@ -28,6 +28,7 @@ executable("llvm-strings") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-strings.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-symbolizer/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-symbolizer/BUILD.gn
index 34e4e41b9c813..8c3a75bf11b44 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-symbolizer/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-symbolizer/BUILD.gn
@@ -33,6 +33,7 @@ executable("llvm-symbolizer") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-symbolizer.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-undname/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-undname/BUILD.gn
index 56f1ed11bc492..f8ca57952b1d5 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-undname/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-undname/BUILD.gn
@@ -4,6 +4,7 @@ executable("llvm-undname") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "llvm-undname.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/sancov/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/sancov/BUILD.gn
index 9c3f5855ecbc9..e802392a717d1 100644
--- a/llvm/utils/gn/secondary/llvm/tools/sancov/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/sancov/BUILD.gn
@@ -12,6 +12,7 @@ executable("sancov") {
     "//llvm/lib/Target:AllTargetsInfos",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "sancov.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/sanstats/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/sanstats/BUILD.gn
index 306775d6f80d4..2a0f43fb20a6f 100644
--- a/llvm/utils/gn/secondary/llvm/tools/sanstats/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/sanstats/BUILD.gn
@@ -4,6 +4,7 @@ executable("sanstats") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "sanstats.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/verify-uselistorder/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/verify-uselistorder/BUILD.gn
index 09fd4899b7999..b0c12497e8839 100644
--- a/llvm/utils/gn/secondary/llvm/tools/verify-uselistorder/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/verify-uselistorder/BUILD.gn
@@ -8,6 +8,7 @@ executable("verify-uselistorder") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "verify-uselistorder.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/tools/yaml2obj/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/yaml2obj/BUILD.gn
index b0e2fe03c0f0f..e0b5526b81f4b 100644
--- a/llvm/utils/gn/secondary/llvm/tools/yaml2obj/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/yaml2obj/BUILD.gn
@@ -4,6 +4,7 @@ executable("yaml2obj") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "yaml2obj.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/AsmParser/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/AsmParser/BUILD.gn
index 7cc4a546ca167..c1fb9328bb12d 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/AsmParser/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/AsmParser/BUILD.gn
@@ -7,6 +7,7 @@ unittest("AsmParserTests") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AsmParserTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/DebugInfo/GSYM/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/DebugInfo/GSYM/BUILD.gn
index a5e13a4134211..e23c08a2804c0 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/DebugInfo/GSYM/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/DebugInfo/GSYM/BUILD.gn
@@ -12,6 +12,7 @@ unittest("DebugInfoGSYMTests") {
     "//llvm/lib/Testing/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "GSYMTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/ExecutionEngine/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/ExecutionEngine/BUILD.gn
index 1076964e23249..eeeea7bba0808 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/ExecutionEngine/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/ExecutionEngine/BUILD.gn
@@ -11,6 +11,7 @@ unittest("ExecutionEngineTests") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "ExecutionEngineTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/ExecutionEngine/JITLink/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/ExecutionEngine/JITLink/BUILD.gn
index 0a85ff7121ec0..23973a5998543 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/ExecutionEngine/JITLink/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/ExecutionEngine/JITLink/BUILD.gn
@@ -10,6 +10,7 @@ unittest("JITLinkTests") {
     "//llvm/lib/Testing/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LinkGraphTests.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn
index 08731d9e63586..c575f6b7339d1 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Frontend/BUILD.gn
@@ -10,6 +10,7 @@ unittest("LLVMFrontendTests") {
     "//llvm/lib/Testing/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "OpenMPIRBuilderTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/LineEditor/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/LineEditor/BUILD.gn
index 0916c9108847c..843f54dfca071 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/LineEditor/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/LineEditor/BUILD.gn
@@ -6,6 +6,7 @@ unittest("LineEditorTests") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LineEditor.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Linker/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Linker/BUILD.gn
index a245ffd20b46f..1b81e98b381a4 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Linker/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Linker/BUILD.gn
@@ -7,6 +7,7 @@ unittest("LinkerTests") {
     "//llvm/lib/Linker",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LinkModulesTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/MI/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/MI/BUILD.gn
index 4ef5ebf1e01bc..1efe9f62c211e 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/MI/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/MI/BUILD.gn
@@ -11,6 +11,7 @@ unittest("MITests") {
     "//llvm/lib/Target:TargetsToBuild",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "LiveIntervalTest.cpp",
   ]
   has_custom_main = true
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Option/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Option/BUILD.gn
index 02a67af2a2f1e..12b253204fdfc 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Option/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Option/BUILD.gn
@@ -13,6 +13,7 @@ unittest("OptionTests") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "OptionParsingTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Passes/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Passes/BUILD.gn
index 4ad9317a21e23..93e1cfae15099 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Passes/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Passes/BUILD.gn
@@ -8,6 +8,7 @@ if (host_os != "win") {
     output_dir = target_out_dir
 
     sources = [
+      # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
       "TestPlugin.cpp",
     ]
 
@@ -35,6 +36,7 @@ unittest("PluginsTests") {
     "//llvm/lib/Testing/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "PluginsTest.cpp",
   ]
 
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Support/DynamicLibrary/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Support/DynamicLibrary/BUILD.gn
index aac3da706d1d2..dd5ec5522802b 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Support/DynamicLibrary/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Support/DynamicLibrary/BUILD.gn
@@ -12,6 +12,7 @@ template("dynlib_add_module") {
     output_dir = target_out_dir
 
     sources = [
+      # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
       "PipSqueak.cpp",
     ]
 
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Target/ARM/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Target/ARM/BUILD.gn
index fd9db37196edb..61f49823bb687 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Target/ARM/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Target/ARM/BUILD.gn
@@ -12,6 +12,7 @@ unittest("ARMTests") {
   ]
   include_dirs = [ "//llvm/lib/Target/ARM" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "MachineInstrTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Target/WebAssembly/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Target/WebAssembly/BUILD.gn
index e02149f738d6b..42d08882f78d0 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Target/WebAssembly/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Target/WebAssembly/BUILD.gn
@@ -13,6 +13,7 @@ unittest("WebAssemblyTests") {
   ]
   include_dirs = [ "//llvm/lib/Target/WebAssembly" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "WebAssemblyExceptionInfoTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/Target/X86/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Target/X86/BUILD.gn
index 5092e7ac56bb6..1f7d412521d65 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Target/X86/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Target/X86/BUILD.gn
@@ -15,6 +15,7 @@ unittest("X86Tests") {
   ]
   include_dirs = [ "//llvm/lib/Target/X86" ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "MachineSizeOptsTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/tools/llvm-exegesis/AArch64/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/tools/llvm-exegesis/AArch64/BUILD.gn
index e72301b6e475f..25550ac4512cb 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/tools/llvm-exegesis/AArch64/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/tools/llvm-exegesis/AArch64/BUILD.gn
@@ -20,6 +20,7 @@ unittest("LLVMExegesisAArch64Tests") {
     "//llvm/tools/llvm-exegesis/lib",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "TargetTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/unittests/tools/llvm-exegesis/ARM/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/tools/llvm-exegesis/ARM/BUILD.gn
index 6c4f768b73087..e7e6bdd15d164 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/tools/llvm-exegesis/ARM/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/tools/llvm-exegesis/ARM/BUILD.gn
@@ -20,6 +20,7 @@ unittest("LLVMExegesisARMTests") {
     "//llvm/tools/llvm-exegesis/lib",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "AssemblerTest.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/utils/FileCheck/BUILD.gn b/llvm/utils/gn/secondary/llvm/utils/FileCheck/BUILD.gn
index 65a2b73e8dbe4..5105ace4569a8 100644
--- a/llvm/utils/gn/secondary/llvm/utils/FileCheck/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/utils/FileCheck/BUILD.gn
@@ -3,6 +3,7 @@ executable("FileCheck") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "FileCheck.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/utils/count/BUILD.gn b/llvm/utils/gn/secondary/llvm/utils/count/BUILD.gn
index efbc2c995b462..c0844df3def98 100644
--- a/llvm/utils/gn/secondary/llvm/utils/count/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/utils/count/BUILD.gn
@@ -1,5 +1,6 @@
 executable("count") {
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "count.c",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/utils/not/BUILD.gn b/llvm/utils/gn/secondary/llvm/utils/not/BUILD.gn
index ea450e1b3c1c7..016fe6bb59a53 100644
--- a/llvm/utils/gn/secondary/llvm/utils/not/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/utils/not/BUILD.gn
@@ -3,6 +3,7 @@ executable("not") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "not.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/llvm/utils/unittest/UnitTestMain/BUILD.gn b/llvm/utils/gn/secondary/llvm/utils/unittest/UnitTestMain/BUILD.gn
index 51bc7b81b93f8..0940e19f2940c 100644
--- a/llvm/utils/gn/secondary/llvm/utils/unittest/UnitTestMain/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/utils/unittest/UnitTestMain/BUILD.gn
@@ -9,6 +9,7 @@ source_set("UnitTestMain") {
     "..:gtest",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "TestMain.cpp",
   ]
   testonly = true
diff --git a/llvm/utils/gn/secondary/llvm/utils/yaml-bench/BUILD.gn b/llvm/utils/gn/secondary/llvm/utils/yaml-bench/BUILD.gn
index e388bf4c38ae2..dddfc560124ed 100644
--- a/llvm/utils/gn/secondary/llvm/utils/yaml-bench/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/utils/yaml-bench/BUILD.gn
@@ -3,6 +3,7 @@ executable("yaml-bench") {
     "//llvm/lib/Support",
   ]
   sources = [
+    # Make `gn format` not collapse this, for sync_source_lists_from_cmake.py.
     "YAMLBench.cpp",
   ]
 }