f334db92be
Scalarize vector FPOWI instead of promoting the type. This allows the scalar FPOWIs to be visited and converted to libcalls before promoting the type. FIXME: This should be done in LegalizeVectorOps/LegalizeDAG, but call lowering needs the unpromoted EVT. Without this patch, in some backends, such as RISCV64 and LoongArch64, the i32 type is illegal and will be promoted. This causes exponent type check to fail when ISD::FPOWI node generates a libcall. Fix https://github.com/llvm/llvm-project/issues/118079