PR ipa/60315
* cif-code.def (UNREACHABLE) New code.
* ipa-inline.c (inline_small_functions): Skip edges to __builtlin_unreachable.
(estimate_edge_growth): Allow edges to __builtlin_unreachable.
* ipa-inline-analysis.c (edge_set_predicate): Redirect edges with false
predicate to __bulitin_unreachable.
(set_cond_stmt_execution_predicate): Fix issue when invert_tree_comparison
returns ERROR_MARK.
* ipa-pure-const.c (propagate_pure_const, propagate_nothrow): Do not
propagate to inline clones.
* cgraph.c (verify_edge_corresponds_to_fndecl): Allow redirection
to unreachable.
* ipa-cp.c (create_specialized_node): Be ready for new node to appear.
* cgraphclones.c (cgraph_clone_node): If call destination is already
ureachable, do not redirect it back.
* tree-inline.c (fold_marked_statements): Hanlde calls becoming
unreachable.
From-SVN: r208831
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