[PATCH] D156214: [LLVM][RISCV] Check more extension dependencies

[Wang Pengcheng via Phabricator via cfe-commits]

wangpc added inline comments.


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Comment at: llvm/lib/Support/RISCVISAInfo.cpp:948
-  // TODO: The 'q' extension requires rv64.
-  // TODO: It is illegal to specify 'e' extensions with 'f' and 'd'.
 
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I think the comment is outdated here. `E` can be combined with all other extensions according to spec:
> Unless otherwise stated, standard extensions compatible with RV32I and RV64I are also compatible with RV32E and RV64E, respectively.
And, please see also D70401 for more context.


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  https://reviews.llvm.org/D156214/new/

https://reviews.llvm.org/D156214