add GCC >=15 __builtin_stdc_rotate_left suppor to rotl #976
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GCC does not support the clang builtins but does have type generic, type-checking __builtin_stdc_rotate_left. The only advantage of this is that the builtin evaluates the arguments only once.
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GCC does not support the clang builtins but does have type generic, type-checking __builtin_stdc_rotate_left.
The only advantage of this is that the builtin evaluates the arguments only once.