[clang] [Clang][Sema] Ensure explicitly defaulted functions respect FP pragmas from their declaration site (PR #207429)

[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] tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaDeclCXX.cpp.obj</summary>

```
FAILED: [code=1] tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaDeclCXX.cpp.obj
sccache C:\clang\clang-msvc\bin\clang-cl.exe  /nologo -TP -DCLANG_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\tools\clang\lib\Sema -IC:\_work\llvm-project\llvm-project\clang\lib\Sema -IC:\_work\llvm-project\llvm-project\clang\include -IC:\_work\llvm-project\llvm-project\build\tools\clang\include -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 /Fotools\clang\lib\Sema\CMakeFiles\obj.clangSema.dir\SemaDeclCXX.cpp.obj /Fdtools\clang\lib\Sema\CMakeFiles\obj.clangSema.dir\ -c -- C:\_work\llvm-project\llvm-project\clang\lib\Sema\SemaDeclCXX.cpp
C:\_work\llvm-project\llvm-project\clang\lib\Sema\SemaDeclCXX.cpp(6920,52): error: no viable conversion from 'FPOptionsOverride' to 'storage_type' (aka 'unsigned long long')
6920 |         Info ? FPOptionsOverride::getFromOpaqueInt(Info->getFPFeatures())
|                                                    ^~~~~~~~~~~~~~~~~~~~~
C:\_work\llvm-project\llvm-project\clang\include\clang/Basic/LangOptions.h(1055,58): note: passing argument to parameter 'I' here
1055 |   static FPOptionsOverride getFromOpaqueInt(storage_type I) {
|                                                          ^
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/207429