b2c48559c8
The patch mainly does two things. The first is allowing scalable vector ISD::STRICT_FP_EXTEND. The second is making RISC-V customized lower strict_fpextend to riscv_strict_fpextend_vl, the strict version of riscv_fpextend_vl. Reviewed By: craig.topper Differential Revision: https://reviews.llvm.org/D145548
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