Haocong Lu 5034994134 [Sema] Warning for _Float16 passed to format specifier '%f' (#74439) ...

According to https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2844.pdf,
default argument promotions for _FloatN types has been removed.

A warning is needed to notice user to promote _Float16 to double
explicitly, and then pass it to format specifier '%f', which is
consistent with GCC.

Fixes: https://github.com/llvm/llvm-project/issues/68538

2024-01-08 09:50:36 +08:00

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