[llvm] [LLVM][TableGen] Parameterize NumToSkip in DecoderEmitter (PR #135882)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-remote-linux-ubuntu` running on `as-builder-9` while building `llvm` at step 7 "build-default".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/195/builds/7711

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 7 (build-default) failure: cmake (failure)
...
11.320 [2122/66/3138] Building AArch64GenAsmWriter1.inc...
11.321 [2121/66/3139] Building CXX object tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/Tool.cpp.o
11.350 [2120/66/3140] Building AArch64GenAsmWriter.inc...
11.361 [2119/66/3141] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaCUDA.cpp.o
11.434 [2118/66/3142] Building AArch64GenPostLegalizeGILowering.inc...
11.438 [2117/66/3143] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/Sema.cpp.o
11.456 [2116/66/3144] Building AArch64GenRegisterBank.inc...
11.470 [2115/66/3145] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaDecl.cpp.o
11.491 [2114/66/3146] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/AnalysisBasedWarnings.cpp.o
11.493 [2113/66/3147] Building AArch64GenDisassemblerTables.inc...
FAILED: lib/Target/AArch64/AArch64GenDisassemblerTables.inc /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/lib/Target/AArch64/AArch64GenDisassemblerTables.inc 
cd /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build && /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/llvm-tblgen -gen-disassembler --num-to-skip-size=3 -I /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/lib/Target/AArch64 -I/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/include -I/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/include -I /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/lib/Target /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/lib/Target/AArch64/AArch64.td --write-if-changed -o lib/Target/AArch64/AArch64GenDisassemblerTables.inc -d lib/Target/AArch64/AArch64GenDisassemblerTables.inc.d
llvm-tblgen: /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/utils/TableGen/DecoderEmitter.cpp:150: void {anonymous}::DecoderTable::patchNumToSkip(size_t, uint32_t): Assertion `DestIdx > FixupIdx + NumToSkipSizeInBytes && "Expecting a forward jump in the decoding table"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/llvm-tblgen -gen-disassembler --num-to-skip-size=3 -I /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/lib/Target/AArch64 -I/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/include -I/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/include -I /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/lib/Target /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/lib/Target/AArch64/AArch64.td --write-if-changed -o lib/Target/AArch64/AArch64GenDisassemblerTables.inc -d lib/Target/AArch64/AArch64GenDisassemblerTables.inc.d
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  llvm-tblgen 0x0000599cef377992
1  llvm-tblgen 0x0000599cef374bdf
2  llvm-tblgen 0x0000599cef374d24
3  libc.so.6   0x000072ebe2045330
4  libc.so.6   0x000072ebe209eb2c pthread_kill + 284
5  libc.so.6   0x000072ebe204527e gsignal + 30
6  libc.so.6   0x000072ebe20288ff abort + 223
7  libc.so.6   0x000072ebe202881b
8  libc.so.6   0x000072ebe203b517
9  llvm-tblgen 0x0000599cef1e63ce
10 llvm-tblgen 0x0000599cef1f1951
11 llvm-tblgen 0x0000599cef1f1516
12 llvm-tblgen 0x0000599cef1f2a63
13 llvm-tblgen 0x0000599cef208de6
14 llvm-tblgen 0x0000599cef3b9ebe
15 llvm-tblgen 0x0000599cef38418a
16 llvm-tblgen 0x0000599cef048687
17 libc.so.6   0x000072ebe202a1ca
18 libc.so.6   0x000072ebe202a28b __libc_start_main + 139
19 llvm-tblgen 0x0000599cef010e05
Aborted (core dumped)
11.525 [2113/65/3148] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaDeclAttr.cpp.o
11.579 [2113/64/3149] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CoverageMappingGen.cpp.o
11.589 [2113/63/3150] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/BackendUtil.cpp.o
In file included from /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/include/llvm/LTO/LTO.h:32,
                 from /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/include/llvm/LTO/LTOBackend.h:22,
                 from /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:38:
/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h: In constructor ‘llvm::FunctionImporter::ImportListsTy::ImportListsTy()’:
/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h:273:33: warning: member ‘llvm::FunctionImporter::ImportListsTy::ImportIDs’ is used uninitialized [-Wuninitialized]
  273 |     ImportListsTy() : EmptyList(ImportIDs) {}
      |                                 ^~~~~~~~~
/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h: In constructor ‘llvm::FunctionImporter::ImportListsTy::ImportListsTy(size_t)’:

```

</details>

https://github.com/llvm/llvm-project/pull/135882