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PR c++/88449 * constexpr.c (struct constexpr_call): Add pretend_const_required member. (constexpr_call_hasher::equal): Return false if pretend_const_required members differ. (cxx_eval_call_expression): Adjust new_call initialization. Hash in ctx->pretend_const_required. * g++.dg/cpp2a/is-constant-evaluated1.C: Change from dg-do compile to dg-do run. (e): Adjust comment with correct expected value. (main): Expect e == 1. * g++.dg/cpp2a/is-constant-evaluated2.C: New test. From-SVN: r267044
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