gcc/
        * builtins.c (fold_builtin_strchr): Remove function.
        (fold_builtin_strrchr): Likewise.
        (fold_builtin2): Remove strchr, index, strrchr, rindex cases.
        * gimple-fold.c (target_char_cst_p): New function.
        (gimple_fold_builtin_strchr) Add more foldings.
        (gimple_fold_builtin): Add index, strrchr, rindex cases.

From-SVN: r240782