PR/51443
        * trans-mem.c (struct diagnose_tm): Remove saw_unsafe.
        (diagnose_tm_1): Same.
        (ipa_tm_execute): Do not test tm_may_enter_irr before we set it.
        (ipa_tm_scan_irr_function): Return gracefully when no
        DECL_STRUCT_FUNCTION.
        (ipa_tm_scan_irr_block): Believe the user on TM attributes.

From-SVN: r182290