[Bug tree-optimization/86829] Missing sin(atan(x)) and cos(atan(x)) optimizations

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86829

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
You shouldn't use float_type_node directly, since the operations might be on
double or long double.

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