[Mlir-commits] [mlir] Revert "[mlir][IR] Generalize `DenseElementsAttr` to custom element types" (PR #181692)

[Matthias Springer]

matthias-springer wrote:

```
# executed command: 'c:\users\tcwg\llvm-worker\flang-arm64-windows-msvc\build\bin\mlir-opt.exe' --convert-to-llvm=filter-dialects=vector --split-input-file 'C:\Users\tcwg\llvm-worker\flang-arm64-windows-msvc\llvm-project\mlir\test\Conversion\VectorToLLVM\vector-to-llvm-interface.mlir'
# .---command stderr------------
# | Assertion failed: implDenseElementType && "`::mlir::FloatType` expected its base interface `::mlir::DenseElementType` to be registered", file C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/build/tools/mlir/include\mlir/IR/BuiltinTypeInterfaces.h.inc, line 251
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
# | Stack dump:
# | 0.	Program arguments: c:\\users\\tcwg\\llvm-worker\\flang-arm64-windows-msvc\\build\\bin\\mlir-opt.exe --convert-to-llvm=filter-dialects=vector --split-input-file C:\\Users\\tcwg\\llvm-worker\\flang-arm64-windows-msvc\\llvm-project\\mlir\\test\\Conversion\\VectorToLLVM\\vector-to-llvm-interface.mlir
# | Exception Code: 0xC000001D
# | #0 0x00007ff73073e7c4 mlir::detail::FallbackTypeIDResolver::registerImplicitTypeID(class llvm::StringRef) (c:\users\tcwg\llvm-worker\flang-arm64-windows-msvc\build\bin\mlir-opt.exe+0x2c0e7c4)
# | #1 0x00007ffcf206ae50 (C:\WINDOWS\System32\ucrtbase.dll+0x7ae50)
# | #2 0x6210fffcf206ba5c
# `-----------------------------
```


https://github.com/llvm/llvm-project/pull/181692