[clang] [llvm] [X86] Add DAG combine to fold promoted f32 sequences for f16 fneg and fabs (PR #189395)

[Tharun V K via cfe-commits]

tharunvk wrote:

Hi @phoebewang . I don't think the Build and Test failure for Linux is not caused by my change.
Can we retrigger the build and check?

https://github.com/llvm/llvm-project/pull/189395