Fix speculative devirtualization ICEHEADtrunkmaster

this patch fixes cgraph verifier ICE about missing indirect call in the
speculative call sequence.  This is triggered when tree-inline manages to
devirtualize call during folding it does and the call has multiple specualtive
targets.  cgraph_update_edges_for_call_stmt_node calls
cgraph_edge::resolve_speculation which resolves one edge, but it should make
the whole sequence direct which is done by cgraph_edge::make_direct.

The code was also handling the case that call changed but it is not direct.
This should be impossible (and would require similar updating) so I added unreachable.

Bootstrapped/regtested x86_64-linux and also tested with autofdo and spec2017.

gcc/ChangeLog:

	PR ipa/123226
	* cgraph.cc (cgraph_update_edges_for_call_stmt_node): Fix handling
	of multi-target speculations resolved at clone materialization time

0 files changed, 0 insertions, 0 deletions