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c2856ceec2
We may not call value_dependent_expression_p on expressions that are not potential constant expressions, otherwise value_d could crash, as I saw recently (in C++98). So beef up the checking in i_d_e_p. This revealed a curious issue: when we have __PRETTY_FUNCTION__ in a template function, we set its DECL_VALUE_EXPR to error_mark_node (cp_make_fname_decl), so potential_c_e returns false when it gets it, but value_dependent_expression_p handles it specially and says true. This broke lambda-generic-pretty1.C. So take care of that. And then also tweak uses_template_parms. gcc/cp/ChangeLog: * constexpr.c (potential_constant_expression_1): Treat __PRETTY_FUNCTION__ inside a template function as potentially-constant. * pt.c (uses_template_parms): Call instantiation_dependent_expression_p instead of value_dependent_expression_p. (instantiation_dependent_expression_p): Check potential_constant_expression before calling value_dependent_expression_p.
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