llvm-project

d21a4357 - [LegalizeVectorOps][RISCV] Don't scalarize FNEG in ExpandFNEG if FSUB is marked Promote.

[LegalizeVectorOps][RISCV] Don't scalarize FNEG in ExpandFNEG if FSUB is marked Promote. We have a special check that tries to determine if vector FP operations are supported for the type to determine whether to scalarize or not. If FP arithmetic would be promoted, don't unroll. This improves Zvfhmin codegen on RISC-V.