[PATCH] D105555: [PoC][RISCV][Clang] Compute the default target-abi if it's empty.

[Jessica Clarke via Phabricator via cfe-commits]

jrtc27 added a comment.

Extract the code out into a shared function, don't duplicate it otherwise we'll get confusing inconsistent defaults. Especially when there are proposals to change the defaults as currently there are some weird interactions where specifying seemingly-redundant flags changes the behaviour (e.g. clang -target riscv32-unknown-elf gets you rv32imac/ilp32, but clang -target riscv32-unknown-elf -mabi=ilp32 gets you rv32imafdc/ilp32).


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  https://reviews.llvm.org/D105555/new/

https://reviews.llvm.org/D105555