[llvm-dev] [RISCV] Does "V" Extention come with "F" "D" "Zfh" Extentions?

[DriveLife via llvm-dev]

Hi all,
When I tried to run "opt -loop-vectorize" on a testcase, an "UNREACHABLE executed" error was received.
The full command is "./build/bin/opt -loop-vectorize -dce -instcombine -mtriple riscv64-linux-gnu -mattr=+experimental-v -debug-only=loop-vectorize -S llvm/test/Transforms/LoopVectorize/RISCV/basic-vec.ll"(basic-vec.ll as attachment).
Missing "+f" in "-mattr" is the reason of "UNREACHABLE executed" error.
The command "./build/bin/opt -loop-vectorize -dce -instcombine -mtriple riscv64-linux-gnu -mattr=+experimental-v,+f -debug-only=loop-vectorize -S llvm/test/Transforms/LoopVectorize/RISCV/basic-vec.ll" works well.
So can we assume that if a target has StdExtF, it also has StdExtF, StdExtD and StdExtZfh?
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