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gcc/ChangeLog: PR middle-end/24295 * cgraphunit.c (cgraph_varpool_remove_unreferenced_decls): Mark alias targets. * varasm.c (find_decl_and_mark_needed): After cgraph global info is ready, stop marking functions, but still mark variables. gcc/testsuite/ChangeLog: PR middle-end/24295 * g++.old-deja/g++.abi/vtable2.C: Do not introduce external declarations with the same names as thunks' alias targets, use aliases instead. * gcc.dg/attr-alias-3.c: New test. * gcc.dg/weak/weak-14.c, gcc.dg/weak/weak-14a.c: New test. From-SVN: r105688
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