PR ipa/91089 - Setup predicate for switch default case in IPA

PR ipa/91089 - Setup predicate for switch default case in IPA

2019-09-17  Feng Xue  <fxue@os.amperecomputing.com>

        PR ipa/91089
        * doc/invoke.texi (ipa-max-switch-predicate-bounds): Document new
        option.
        * params.def (PARAM_IPA_MAX_SWITCH_PREDICATE_BOUNDS): New.
        * ipa-fnsummary.c (set_switch_stmt_execution_predicate): Add predicate
        for switch default case using range analysis information.

2019-09-17  Feng Xue  <fxue@os.amperecomputing.com>

        PR ipa/91089
        * gcc.dg/ipa/pr91089.c: New test.

From-SVN: r275802