gcc/

	PR target/69729
	* lto-streamer-out.c (lto_output): Use thunk.add_pointer_bounds_args
	to correctly determine instrumentation thunks.

gcc/testsuite/

	* g++.dg/lto/lto.exp: Include and init mpx.
	* g++.dg/lto/pr69729_0.C: New test.

From-SVN: r233376