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this fixes ICE in inliner cache sanity check which is caused by very old bug in visibility calculation in cgraph_node::function_symbol and cgraph_node::function_or_virtual_thunk_symbol. In the testcase there is indirect call to a thunk. At begining we correctly see that its body as AVAIL_AVAILABLE but later we inline into the thunk and this turns it to AVAIL_INTERPOSABLE. This is because function_symbol incorrectly overwrites availability parameter by availability of the alias used in the call within thunk, which is a local alias. gcc/ChangeLog: 2020-03-19 Jan Hubicka <hubicka@ucw.cz> PR ipa/94202 * cgraph.c (cgraph_node::function_symbol): Fix availability computation. (cgraph_node::function_or_virtual_thunk_symbol): Likewise. gcc/testsuite/ChangeLog: 2020-03-19 Jan Hubicka <hubicka@ucw.cz> PR ipa/94202 * g++.dg/torture/pr94202.C: New test.
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