[clang] [flang] [llvm] [flang] Improve the error message for the option "-fconvert" with allowed values (PR #215966)

[via cfe-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

The build failed before running any tests. Click on a failure below to see the details.

<details>
<summary>[code=1] utils/TableGen/CMakeFiles/llvm-tblgen.dir/OptionParserEmitter.cpp.obj</summary>

```
FAILED: [code=1] utils/TableGen/CMakeFiles/llvm-tblgen.dir/OptionParserEmitter.cpp.obj
sccache C:\clang\clang-msvc\bin\clang-cl.exe  /nologo -TP -DLLVM_BUILD_STATIC -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IC:\_work\llvm-project\llvm-project\build\utils\TableGen -IC:\_work\llvm-project\llvm-project\llvm\utils\TableGen -IC:\_work\llvm-project\llvm-project\build\include -IC:\_work\llvm-project\llvm-project\llvm\include /DWIN32 /D_WINDOWS   /Zc:inline /Zc:__cplusplus /Oi /Brepro /bigobj /permissive- -Werror=unguarded-availability-new /W4  -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported /Gw /O2 /Ob2  -std:c++17 -MD -UNDEBUG /EHs-c- /GR- /showIncludes /Foutils\TableGen\CMakeFiles\llvm-tblgen.dir\OptionParserEmitter.cpp.obj /Fdutils\TableGen\CMakeFiles\llvm-tblgen.dir\ -c -- C:\_work\llvm-project\llvm-project\llvm\utils\TableGen\OptionParserEmitter.cpp
In file included from C:\_work\llvm-project\llvm-project\llvm\utils\TableGen\OptionParserEmitter.cpp:15:
C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/OptTable.h(333,34): error: no member named 'Values' in 'llvm::opt::OptTable::Info'
333 |     return StringRef(getInfo(id).Values);
|                      ~~~~~~~~~~~ ^
1 error generated.
```
</details>
<details>
<summary>[code=1] lib/Option/CMakeFiles/LLVMOption.dir/Option.cpp.obj</summary>

```
FAILED: [code=1] lib/Option/CMakeFiles/LLVMOption.dir/Option.cpp.obj
sccache C:\clang\clang-msvc\bin\clang-cl.exe  /nologo -TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IC:\_work\llvm-project\llvm-project\build\lib\Option -IC:\_work\llvm-project\llvm-project\llvm\lib\Option -IC:\_work\llvm-project\llvm-project\build\include -IC:\_work\llvm-project\llvm-project\llvm\include /DWIN32 /D_WINDOWS   /Zc:inline /Zc:__cplusplus /Oi /Brepro /bigobj /permissive- -Werror=unguarded-availability-new /W4  -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported /Gw /O2 /Ob2  -std:c++17 -MD -UNDEBUG /EHs-c- /GR- /showIncludes /Folib\Option\CMakeFiles\LLVMOption.dir\Option.cpp.obj /Fdlib\Option\CMakeFiles\LLVMOption.dir\LLVMOption.pdb -c -- C:\_work\llvm-project\llvm-project\llvm\lib\Option\Option.cpp
In file included from C:\_work\llvm-project\llvm-project\llvm\lib\Option\Option.cpp:9:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/Option.h:15:
C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/OptTable.h(333,34): error: no member named 'Values' in 'llvm::opt::OptTable::Info'
333 |     return StringRef(getInfo(id).Values);
|                      ~~~~~~~~~~~ ^
1 error generated.
```
</details>
<details>
<summary>[code=1] lib/Option/CMakeFiles/LLVMOption.dir/Arg.cpp.obj</summary>

```
FAILED: [code=1] lib/Option/CMakeFiles/LLVMOption.dir/Arg.cpp.obj
sccache C:\clang\clang-msvc\bin\clang-cl.exe  /nologo -TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IC:\_work\llvm-project\llvm-project\build\lib\Option -IC:\_work\llvm-project\llvm-project\llvm\lib\Option -IC:\_work\llvm-project\llvm-project\build\include -IC:\_work\llvm-project\llvm-project\llvm\include /DWIN32 /D_WINDOWS   /Zc:inline /Zc:__cplusplus /Oi /Brepro /bigobj /permissive- -Werror=unguarded-availability-new /W4  -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported /Gw /O2 /Ob2  -std:c++17 -MD -UNDEBUG /EHs-c- /GR- /showIncludes /Folib\Option\CMakeFiles\LLVMOption.dir\Arg.cpp.obj /Fdlib\Option\CMakeFiles\LLVMOption.dir\LLVMOption.pdb -c -- C:\_work\llvm-project\llvm-project\llvm\lib\Option\Arg.cpp
In file included from C:\_work\llvm-project\llvm-project\llvm\lib\Option\Arg.cpp:9:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/Arg.h:19:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/Option.h:15:
C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/OptTable.h(333,34): error: no member named 'Values' in 'llvm::opt::OptTable::Info'
333 |     return StringRef(getInfo(id).Values);
|                      ~~~~~~~~~~~ ^
1 error generated.
```
</details>
<details>
<summary>[code=1] lib/Option/CMakeFiles/LLVMOption.dir/ArgList.cpp.obj</summary>

```
FAILED: [code=1] lib/Option/CMakeFiles/LLVMOption.dir/ArgList.cpp.obj
sccache C:\clang\clang-msvc\bin\clang-cl.exe  /nologo -TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IC:\_work\llvm-project\llvm-project\build\lib\Option -IC:\_work\llvm-project\llvm-project\llvm\lib\Option -IC:\_work\llvm-project\llvm-project\build\include -IC:\_work\llvm-project\llvm-project\llvm\include /DWIN32 /D_WINDOWS   /Zc:inline /Zc:__cplusplus /Oi /Brepro /bigobj /permissive- -Werror=unguarded-availability-new /W4  -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported /Gw /O2 /Ob2  -std:c++17 -MD -UNDEBUG /EHs-c- /GR- /showIncludes /Folib\Option\CMakeFiles\LLVMOption.dir\ArgList.cpp.obj /Fdlib\Option\CMakeFiles\LLVMOption.dir\LLVMOption.pdb -c -- C:\_work\llvm-project\llvm-project\llvm\lib\Option\ArgList.cpp
In file included from C:\_work\llvm-project\llvm-project\llvm\lib\Option\ArgList.cpp:9:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/ArgList.h:19:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/Arg.h:19:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/Option.h:15:
C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/OptTable.h(333,34): error: no member named 'Values' in 'llvm::opt::OptTable::Info'
333 |     return StringRef(getInfo(id).Values);
|                      ~~~~~~~~~~~ ^
1 error generated.
```
</details>
<details>
<summary>[code=1] lib/Option/CMakeFiles/LLVMOption.dir/OptTable.cpp.obj</summary>

```
FAILED: [code=1] lib/Option/CMakeFiles/LLVMOption.dir/OptTable.cpp.obj
sccache C:\clang\clang-msvc\bin\clang-cl.exe  /nologo -TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IC:\_work\llvm-project\llvm-project\build\lib\Option -IC:\_work\llvm-project\llvm-project\llvm\lib\Option -IC:\_work\llvm-project\llvm-project\build\include -IC:\_work\llvm-project\llvm-project\llvm\include /DWIN32 /D_WINDOWS   /Zc:inline /Zc:__cplusplus /Oi /Brepro /bigobj /permissive- -Werror=unguarded-availability-new /W4  -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported /Gw /O2 /Ob2  -std:c++17 -MD -UNDEBUG /EHs-c- /GR- /showIncludes /Folib\Option\CMakeFiles\LLVMOption.dir\OptTable.cpp.obj /Fdlib\Option\CMakeFiles\LLVMOption.dir\LLVMOption.pdb -c -- C:\_work\llvm-project\llvm-project\llvm\lib\Option\OptTable.cpp
In file included from C:\_work\llvm-project\llvm-project\llvm\lib\Option\OptTable.cpp:9:
C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/OptTable.h(333,34): error: no member named 'Values' in 'llvm::opt::OptTable::Info'
333 |     return StringRef(getInfo(id).Values);
|                      ~~~~~~~~~~~ ^
1 error generated.
```
</details>
<details>
<summary>[code=1] lib/ObjCopy/CMakeFiles/LLVMObjCopy.dir/ELF/ELFObjcopy.cpp.obj</summary>

```
FAILED: [code=1] lib/ObjCopy/CMakeFiles/LLVMObjCopy.dir/ELF/ELFObjcopy.cpp.obj
sccache C:\clang\clang-msvc\bin\clang-cl.exe  /nologo -TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IC:\_work\llvm-project\llvm-project\build\lib\ObjCopy -IC:\_work\llvm-project\llvm-project\llvm\lib\ObjCopy -IC:\_work\llvm-project\llvm-project\build\include -IC:\_work\llvm-project\llvm-project\llvm\include /DWIN32 /D_WINDOWS   /Zc:inline /Zc:__cplusplus /Oi /Brepro /bigobj /permissive- -Werror=unguarded-availability-new /W4  -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported /Gw /O2 /Ob2  -std:c++17 -MD -UNDEBUG /EHs-c- /GR- /showIncludes /Folib\ObjCopy\CMakeFiles\LLVMObjCopy.dir\ELF\ELFObjcopy.cpp.obj /Fdlib\ObjCopy\CMakeFiles\LLVMObjCopy.dir\LLVMObjCopy.pdb -c -- C:\_work\llvm-project\llvm-project\llvm\lib\ObjCopy\ELF\ELFObjcopy.cpp
In file included from C:\_work\llvm-project\llvm-project\llvm\lib\ObjCopy\ELF\ELFObjcopy.cpp:24:
In file included from C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/Option.h:15:
C:\_work\llvm-project\llvm-project\llvm\include\llvm/Option/OptTable.h(333,34): error: no member named 'Values' in 'llvm::opt::OptTable::Info'
333 |     return StringRef(getInfo(id).Values);
|                      ~~~~~~~~~~~ ^
1 error generated.
```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/215966