[PATCH] D131351: [C] Default implicit function pointer conversions diagnostic to be an error

[Martin Storsjö via Phabricator via cfe-commits]

mstorsjo added a comment.

A different but slightly similar case, where I've run into these errors too, FWIW: On ARM, when compiling with a hardfloat target, Clang does consider a function pointer with `__attribute__((pcs("aapcs-vfp")))` different from one without, even if the default still in the end would end up equal to it. I guess the problem there is that Clang doesn't know what the default implicit calling convention is (and that's something that ends up resolved on the LLVM side while lowering code) - while e.g. Clang does know that `__cdecl` is equivalent to not declaring any calling convention at all.


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