llvm-project

70136389 - [DAG] Add support for `nneg` flag with `uitofp`

[DAG] Add support for `nneg` flag with `uitofp` Copy `nneg` flag when building `UINT_TO_FP` from `uitofp` and use `nneg` flag in the one place we transform `UINT_TO_FP` -> `SINT_TO_FP` if the operand is non-negative.