Add name offset flags, for parity with cvtres.exe.

[ecbeckmann]

Summary

The original cvtres.exe sets the high bit when an identifier offset
points to a string. Even though this is not mentioned in the spec, and
in fact does not seem to cause errors with most cases, for some reason
this causes a failure in Chromium where the new resource file is not
verified as a new version. This patch sets this high bit flag, and also
adds a test case to check that the output of our library is always
identical to original cvtres.

[ruiu]

Does this mean that the output of your cvtres is exactly bit-wise the same as Microsoft's?

[ecbeckmann]

In D35099#803935, @ruiu wrote:

Does this mean that the output of your cvtres is exactly bit-wise the same as Microsoft's?

Yes that is now the case.

[ruiu]

Nice!

lld/test/COFF/combined-resources.test

 // Check that lld properly handles merging multiple .res files.
 // The inputs were generated with the following commands, using the original
 // Windows rc.exe
 // > rc /fo combined-resources.res /nologo combined-resources.rc
 // > rc /fo combined-resources-2.res /nologo combined-resources-2.rc
 
 # REQUIRES: winres
 
 # RUN: yaml2obj < %p/Inputs/ret42.yaml > %t.obj
 # RUN: lld-link /out:%t.exe /entry:main %t.obj %p/Inputs/resource.res \
 # RUN:   %p/Inputs/combined-resources.res %p/Inputs/combined-resources-2.res
 
-# RUN: llvm-readobj -coff-resources -file-headers %t.exe | FileCheck %s
-
+# RUN: llvm-readobj -coff-resources -file-headers -section-data %t.exe | \
+# RUN:   FileCheck %s
 
 CHECK:      ResourceTableRVA: 0x1000
 CHECK-NEXT: ResourceTableSize: 0xC1C
 CHECK-DAG:  Resources [
 CHECK-NEXT:   Total Number of Resources: 13
+CHECK-DAG:  .rsrc Data (
+CHECK-NEXT: 0000: 00000000 00000000 00000000 01000600  |................|
+CHECK-NEXT: 0010: 38030080 48000080 02000000 60000080  |8...H.......`...|
+CHECK-NEXT: 0020: 04000000 80000080 05000000 A0000080  |................|
+CHECK-NEXT: 0030: 06000000 B8000080 09000000 D0000080  |................|
+CHECK-NEXT: 0040: 0A000000 F0000080 00000000 00000000  |................|
+CHECK-NEXT: 0050: 00000000 01000000 50030080 08010080  |........P.......|
+CHECK-NEXT: 0060: 00000000 00000000 00000000 02000000  |................|
+CHECK-NEXT: 0070: FE020080 20010080 0C030080 38010080  |.... .......8...|
+CHECK-NEXT: 0080: 00000000 00000000 00000000 01000100  |................|
+CHECK-NEXT: 0090: 2C030080 50010080 60380000 68010080  |,...P...`8..h...|
+CHECK-NEXT: 00A0: 00000000 00000000 00000000 01000000  |................|
+CHECK-NEXT: 00B0: 16030080 80010080 00000000 00000000  |................|
+CHECK-NEXT: 00C0: 00000000 00000100 01000000 98010080  |................|
+CHECK-NEXT: 00D0: 00000000 00000000 00000000 01000100  |................|
+CHECK-NEXT: 00E0: E0020080 B0010080 0C000000 D0010080  |................|
+CHECK-NEXT: 00F0: 00000000 00000000 00000000 01000000  |................|
+CHECK-NEXT: 0100: 66030080 E8010080 00000000 00000000  |f...............|
+CHECK-NEXT: 0110: 00000000 00000100 09040000 10020000  |................|
+CHECK-NEXT: 0120: 00000000 00000000 00000000 00000100  |................|
+CHECK-NEXT: 0130: 09040000 20020000 00000000 00000000  |.... ...........|
+CHECK-NEXT: 0140: 00000000 00000100 09040000 30020000  |............0...|
+CHECK-NEXT: 0150: 00000000 00000000 00000000 00000100  |................|
+CHECK-NEXT: 0160: 090C0000 40020000 00000000 00000000  |....@...........|
+CHECK-NEXT: 0170: 00000000 00000100 04080000 50020000  |............P...|
+CHECK-NEXT: 0180: 00000000 00000000 00000000 00000100  |................|
+CHECK-NEXT: 0190: 09040000 60020000 00000000 00000000  |....`...........|
+CHECK-NEXT: 01A0: 00000000 00000100 09040000 70020000  |............p...|
+CHECK-NEXT: 01B0: 00000000 00000000 00000000 00000200  |................|
+CHECK-NEXT: 01C0: 09040000 80020000 04080000 90020000  |................|
+CHECK-NEXT: 01D0: 00000000 00000000 00000000 00000100  |................|
+CHECK-NEXT: 01E0: 09040000 A0020000 00000000 00000000  |................|
+CHECK-NEXT: 01F0: 00000000 00000300 09040000 B0020000  |................|
+CHECK-NEXT: 0200: 04080000 C0020000 07100000 D0020000  |................|
+CHECK-NEXT: 0210: FC1A0000 39000000 00000000 00000000  |....9...........|
+CHECK-NEXT: 0220: C4130000 28030000 00000000 00000000  |....(...........|
+CHECK-NEXT: 0230: EC160000 28030000 00000000 00000000  |....(...........|
+CHECK-NEXT: 0240: CC1A0000 30000000 00000000 00000000  |....0...........|
+CHECK-NEXT: 0250: 141A0000 2E000000 00000000 00000000  |................|
+CHECK-NEXT: 0260: 441A0000 6C000000 00000000 00000000  |D...l...........|
+CHECK-NEXT: 0270: 7C130000 2A000000 00000000 00000000  ||...*...........|
+CHECK-NEXT: 0280: AC130000 18000000 00000000 00000000  |................|
+CHECK-NEXT: 0290: 041C0000 18000000 00000000 00000000  |................|
+CHECK-NEXT: 02A0: B41A0000 18000000 00000000 00000000  |................|
+CHECK-NEXT: 02B0: 3C1B0000 36000000 00000000 00000000  |<...6...........|
+CHECK-NEXT: 02C0: 741B0000 43000000 00000000 00000000  |t...C...........|
+CHECK-NEXT: 02D0: BC1B0000 42000000 00000000 00000000  |....B...........|
+CHECK-NEXT: 02E0: 0E004D00 59004100 43004300 45004C00  |..M.Y.A.C.C.E.L.|
+CHECK-NEXT: 02F0: 45005200 41005400 4F005200 53000600  |E.R.A.T.O.R.S...|
+CHECK-NEXT: 0300: 43005500 52005300 4F005200 04004F00  |C.U.R.S.O.R...O.|
+CHECK-NEXT: 0310: 4B004100 59000A00 54004500 53005400  |K.A.Y...T.E.S.T.|
+CHECK-NEXT: 0320: 44004900 41004C00 4F004700 05002200  |D.I.A.L.O.G...".|
+CHECK-NEXT: 0330: 45004100 54002200 0B005300 54005200  |E.A.T."...S.T.R.|
+CHECK-NEXT: 0340: 49004E00 47004100 52005200 41005900  |I.N.G.A.R.R.A.Y.|
+CHECK-NEXT: 0350: 0A004D00 59005200 45005300 4F005500  |..M.Y.R.E.S.O.U.|
+CHECK-NEXT: 0360: 52004300 45000900 52004100 4E004400  |R.C.E...R.A.N.D.|
+CHECK-NEXT: 0370: 4F004D00 44004100 54000000 00000500  |O.M.D.A.T.......|
+CHECK-NEXT: 0380: 48006500 6C006C00 6F000000 00000000  |H.e.l.l.o.......|
+CHECK-NEXT: 0390: 00000000 00000000 00000000 00000000  |................|
+CHECK-NEXT: 03A0: 00000000 00000000 00000000 11000300  |................|
+CHECK-NEXT: 03B0: E7030000 0D004400 4C040000 82001200  |......D.L.......|
+CHECK-NEXT: 03C0: BC010000 28000000 10000000 10000000  |....(...........|
+CHECK-NEXT: 03D0: 01001800 00000000 00030000 C40E0000  |................|
+CHECK-NEXT: 03E0: C40E0000 00000000 00000000 FFFFFFFF  |................|
+CHECK-NEXT: 03F0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0400: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0410: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0420: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0430: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0440: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0450: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0460: FF7F7F7F 7C7C7C78 78787575 75FFFFFF  |....|||xxxuuu...|
+CHECK-NEXT: 0470: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0480: FFFFFFFF FFFFFFFF 979797FF FFFFFFFF  |................|
+CHECK-NEXT: 0490: FF838383 AAAAAADB DBDB7979 79757575  |..........yyyuuu|
+CHECK-NEXT: 04A0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 04B0: FFFFFFFF FFFFFFFF 9C9C9C98 9898FFFF  |................|
+CHECK-NEXT: 04C0: FF888888 DBDBDBB7 B7B77D7D 7DFFFFFF  |..........}}}...|
+CHECK-NEXT: 04D0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 04E0: FFFFFFFF FFFFFFFF A0A0A09C 9C9C9393  |................|
+CHECK-NEXT: 04F0: 93ADADAD F2F2F284 84848181 81FFFFFF  |................|
+CHECK-NEXT: 0500: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0510: FFFFFFFF FFFFFFFF A4A4A4D7 D7D79D9D  |................|
+CHECK-NEXT: 0520: 9DD0D0D0 EEEEEE91 91918D8D 8DFFFFFF  |................|
+CHECK-NEXT: 0530: FFFFFF81 81817E7E 7EFFFFFF FFFFFFFF  |......~~~.......|
+CHECK-NEXT: 0540: FFFFFFFF FFFFFFFF A9A9A9F2 F2F2E5E5  |................|
+CHECK-NEXT: 0550: E5E2E2E2 95959591 91918D8D 8D898989  |................|
+CHECK-NEXT: 0560: 868686FF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0570: FFFFFFFF FFFFFFFF ADADADF2 F2F2E1E1  |................|
+CHECK-NEXT: 0580: E1DFDFDF E7E7E7E4 E4E4BBBB BB8E8E8E  |................|
+CHECK-NEXT: 0590: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 05A0: FFFFFFFF FFFFFFFF B5B5B5F2 F2F2E8E8  |................|
+CHECK-NEXT: 05B0: E8E7E7E7 EAEAEAC6 C6C69E9E 9EFFFFFF  |................|
+CHECK-NEXT: 05C0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 05D0: FFFFFFFF FFFFFFFF B9B9B9F4 F4F4ECEC  |................|
+CHECK-NEXT: 05E0: ECEDEDED CBCBCBA7 A7A7FFFF FFFFFFFF  |................|
+CHECK-NEXT: 05F0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0600: FFFFFFFF FFFFFFFF BDBDBDF7 F7F7EFEF  |................|
+CHECK-NEXT: 0610: EFD0D0D0 AFAFAFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0620: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0630: FFFFFFFF FFFFFFFF C1C1C1F7 F7F7D5D5  |................|
+CHECK-NEXT: 0640: D5B6B6B6 FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0650: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0660: FFFFFFFF FFFFFFFF C4C4C4D9 D9D9BEBE  |................|
+CHECK-NEXT: 0670: BEFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0680: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0690: FFFFFFFF FFFFFFFF C8C8C8C5 C5C5FFFF  |................|
+CHECK-NEXT: 06A0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 06B0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 06C0: FFFFFFFF FFFFFFFF CBCBCBFF FFFFFFFF  |................|
+CHECK-NEXT: 06D0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 06E0: FFFFFFFF FFFFFFFF FFFFFFFF 28000000  |............(...|
+CHECK-NEXT: 06F0: 10000000 10000000 01001800 00000000  |................|
+CHECK-NEXT: 0700: 00030000 C40E0000 C40E0000 00000000  |................|
+CHECK-NEXT: 0710: 00000000 FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0720: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0730: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0740: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0750: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0760: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0770: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0780: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0790: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 07A0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 07B0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 07C0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 07D0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 07E0: A0E3A901 B31801B3 1801B318 01B31801  |................|
+CHECK-NEXT: 07F0: B31801B3 1861D06F FFFFFFFF FFFFFFFF  |.....a.o........|
+CHECK-NEXT: 0800: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0810: 01B31800 D7331CDB 49DBF9E2 9BEFAF00  |.....3..I.......|
+CHECK-NEXT: 0820: D73300D7 3301B318 FFFFFFFF FFFFFFFF  |.3..3...........|
+CHECK-NEXT: 0830: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0840: 01B31800 DE55F6FE F9DBFAE7 FEFFFE86  |.....U..........|
+CHECK-NEXT: 0850: EFAE00DE 5501B318 FFFFFFFF FFFFFFFF  |....U...........|
+CHECK-NEXT: 0860: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0870: 01B31800 E676DBFB EC00E676 57EFA5FB  |.....v.....vW...|
+CHECK-NEXT: 0880: FFFD55EE A401B318 FFFFFFFF FFFFFFFF  |..U.............|
+CHECK-NEXT: 0890: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 08A0: 01B31800 ED9800ED 9800ED98 00ED9887  |................|
+CHECK-NEXT: 08B0: F7CFFEFF FF01B318 FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 08C0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 08D0: 01B31800 F4BA00F4 BA00F4BA 00F4BA00  |................|
+CHECK-NEXT: 08E0: F4BA9CFB E401B318 FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 08F0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0900: 01B31800 FBDB00FB DB00FBDB 00FBDB00  |................|
+CHECK-NEXT: 0910: FBDB00FB DB01B318 FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0920: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0930: 9FE2A801 B31801B3 1801B318 01B31801  |................|
+CHECK-NEXT: 0940: B31801B3 1861D06F FFFFFFFF FFFFFFFF  |.....a.o........|
+CHECK-NEXT: 0950: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0960: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0970: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0980: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0990: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 09A0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 09B0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 09C0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 09D0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 09E0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 09F0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0A00: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF  |................|
+CHECK-NEXT: 0A10: FFFFFFFF 00000000 00006400 79007500  |..........d.y.u.|
+CHECK-NEXT: 0A20: 00000000 65007300 68006100 6C006100  |....e.s.h.a.l.a.|
+CHECK-NEXT: 0A30: 00008000 66006B00 61006F00 79006100  |....f.k.a.o.y.a.|
+CHECK-NEXT: 0A40: 00000000 0000C080 00000000 02000A00  |................|
+CHECK-NEXT: 0A50: 0A00C800 2C010000 00005400 65007300  |....,.....T.e.s.|
+CHECK-NEXT: 0A60: 74000000 01000250 00000000 0A000A00  |t......P........|
+CHECK-NEXT: 0A70: E6000E00 0100FFFF 82004300 6F006E00  |..........C.o.n.|
+CHECK-NEXT: 0A80: 74006900 6E007500 65003A00 00000000  |t.i.n.u.e.:.....|
+CHECK-NEXT: 0A90: 00000150 00000000 42008600 A1000D00  |...P....B.......|
+CHECK-NEXT: 0AA0: 0200FFFF 80002600 4F004B00 00000000  |......&.O.K.....|
+CHECK-NEXT: 0AB0: 00000000 11005800 A4000000 0D004800  |......X.......H.|
+CHECK-NEXT: 0AC0: 2E160000 82001200 BC010000 00000000  |................|
+CHECK-NEXT: 0AD0: 00006400 66006900 73006800 00000000  |..d.f.i.s.h.....|
+CHECK-NEXT: 0AE0: 65007300 61006C00 61006400 00008000  |e.s.a.l.a.d.....|
+CHECK-NEXT: 0AF0: 66006400 75006300 6B000000 74686973  |f.d.u.c.k...this|
+CHECK-NEXT: 0B00: 20697320 61207573 65722064 6566696E  | is a user defin|
+CHECK-NEXT: 0B10: 65642072 65736F75 72636500 69742063  |ed resource.it c|
+CHECK-NEXT: 0B20: 6F6E7461 696E7320 6D616E79 20737472  |ontains many str|
+CHECK-NEXT: 0B30: 696E6773 00000000 00000000 74686973  |ings........this|
+CHECK-NEXT: 0B40: 20697320 61207261 6E646F6D 20626974  | is a random bit|
+CHECK-NEXT: 0B50: 206F6620 64617461 20746861 74206D65  | of data that me|
+CHECK-NEXT: 0B60: 616E7320 6E6F7468 696E6700 A9230E14  |ans nothing..#..|
+CHECK-NEXT: 0B70: F4F60000 7A686534 20736869 34207969  |....zhe4 shi4 yi|
+CHECK-NEXT: 0B80: 31676534 20737569 326A6931 20646520  |1ge4 sui2ji1 de |
+CHECK-NEXT: 0B90: 73687534 6A75342C 207A6865 34207969  |shu4ju4, zhe4 yi|
+CHECK-NEXT: 0BA0: 34776569 347A6865 20736865 6E326D65  |4wei4zhe shen2me|
+CHECK-NEXT: 0BB0: 00A9230E 14F4F600 00000000 44696573  |..#.........Dies|
+CHECK-NEXT: 0BC0: 20697374 2065696E 207A7566 C3A46C6C  | ist ein zuf..ll|
+CHECK-NEXT: 0BD0: 69676573 20426974 20766F6E 20446174  |iges Bit von Dat|
+CHECK-NEXT: 0BE0: 656E2C20 64696520 6E696368 74732062  |en, die nichts b|
+CHECK-NEXT: 0BF0: 65646575 74657400 A9230E14 F4F60000  |edeutet..#......|
+CHECK-NEXT: 0C00: 00000000 11000300 E7030000 0D004400  |..............D.|
+CHECK-NEXT: 0C10: 4C040000 82001200 BC010000           |L...........|
+CHECK-NEXT: )

llvm/include/llvm/Object/COFF.h

 
 struct coff_resource_dir_entry {
   union {
     support::ulittle32_t NameOffset;
     support::ulittle32_t ID;
     uint32_t getNameOffset() const {
       return maskTrailingOnes<uint32_t>(31) & NameOffset;
     }
+    // Even though the PE/COFF spec doesn't mention this, the high bit of a name
+    // offset is set.
+    void setNameOffset(uint32_t Offset) { NameOffset = Offset | (1 << 31); }
   } Identifier;
   union {
     support::ulittle32_t DataEntryOffset;
     support::ulittle32_t SubdirOffset;
 
     bool isSubDir() const { return SubdirOffset >> 31; }
     uint32_t value() const {
       return maskTrailingOnes<uint32_t>(31) & SubdirOffset;

llvm/lib/Object/WindowsResource.cpp

while (!Queue.empty()) {
     Table->NumberOfIDEntries = IDChildren.size();
     CurrentOffset += sizeof(coff_resource_dir_table);
     CurrentRelativeOffset += sizeof(coff_resource_dir_table);
 
     // Write the directory entries immediately following each directory table.
     for (auto const &Child : StringChildren) {
       auto *Entry = reinterpret_cast<coff_resource_dir_entry *>(BufferStart +
                                                                 CurrentOffset);
-      Entry->Identifier.NameOffset =
-          StringTableOffsets[Child.second->getStringIndex()];
+      Entry->Identifier.setNameOffset(
+          StringTableOffsets[Child.second->getStringIndex()]);
       if (Child.second->checkIsDataNode()) {
         Entry->Offset.DataEntryOffset = NextLevelOffset;
         NextLevelOffset += sizeof(coff_resource_data_entry);
         DataEntriesTreeOrder.push_back(Child.second.get());
       } else {
         Entry->Offset.SubdirOffset = NextLevelOffset + (1 << 31);
         NextLevelOffset += sizeof(coff_resource_dir_table) +
                            (Child.second->getStringChildren().size() +