[clang] [clang][bytecode] Add support for typeid pointers (PR #121251)

Sat Dec 28 05:11:32 PST 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64-aix` running on `aix-ppc64` while building `clang` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/64/builds/1803

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
28.039 [39/10/10] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/EvaluationResult.cpp.o
28.272 [38/10/11] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/InterpBuiltinBitCast.cpp.o
33.607 [37/10/12] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/DynamicAllocator.cpp.o
36.057 [36/10/13] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/InterpBuiltin.cpp.o
37.919 [35/10/14] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/InterpBlock.cpp.o
40.482 [34/10/15] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/InterpFrame.cpp.o
40.709 [33/10/16] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Compiler.cpp.o
44.044 [32/10/17] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/InterpStack.cpp.o
46.943 [31/10/18] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/InterpState.cpp.o
48.398 [30/10/19] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o
FAILED: tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o 
/usr/local/clang-17.0.2/bin/clang++ -DCLANG_EXPORTS -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_LARGE_FILE_API -D_XOPEN_SOURCE=700 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/build/tools/clang/lib/AST -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/clang/lib/AST -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/clang/include -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/build/tools/clang/include -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/build/include -I/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/include -mcmodel=large -fPIC -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o -MF tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o.d -o tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o -c /home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp
/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp:319:3: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
  319 |   case Storage::Typeid:
      |   ^
/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp:319:3: note: insert 'LLVM_FALLTHROUGH;' to silence this warning
  319 |   case Storage::Typeid:
      |   ^
      |   LLVM_FALLTHROUGH; 
/home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp:319:3: note: insert 'break;' to avoid fall-through
  319 |   case Storage::Typeid:
      |   ^
      |   break; 
1 error generated.
50.356 [30/9/20] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/PrimType.cpp.o
53.488 [30/8/21] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Program.cpp.o
55.350 [30/7/22] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/State.cpp.o
57.392 [30/6/23] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/MemberPointer.cpp.o
69.022 [30/5/24] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ExprConstant.cpp.o
75.070 [30/4/25] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/EvalEmitter.cpp.o
78.297 [30/3/26] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ASTContext.cpp.o
91.165 [30/2/27] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Disasm.cpp.o
99.926 [30/1/28] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Interp.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/121251