llvm-project

c28b1a19 - [LegalizeTypes][RISCV] Use SPLAT_VECTOR_PARTS to legalize splat BUILD_VECTOR (#107290)

[LegalizeTypes][RISCV] Use SPLAT_VECTOR_PARTS to legalize splat BUILD_VECTOR (#107290) If the element type needs to be expanded, we can use SPLAT_VECTOR_PARTS if the target supports it. There's already a DAGCombine to turn BUILD_VECTOR into SPLAT_VECTOR if the target makes SPLAT_VECTOR legal, but it doesn't fire for vectors that need to be split.