re PR c++/90909 (call devirtualized to pure virtual)

re PR c++/90909 (call devirtualized to pure virtual)

/cp
2019-06-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/90909
	Revert:
	2019-05-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/67184
	PR c++/69445
	* call.c (build_over_call): Devirtualize when the final overrider
	comes from the base.

/testsuite
2019-06-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/90909
	Revert:
	2019-05-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/67184
	PR c++/69445
	* g++.dg/other/final3.C: New.
	* g++.dg/other/final4.C: Likewise.
	* g++.dg/other/final5.C: Likewise.

	* g++.dg/other/final6.C: New.

From-SVN: r272574