2019-11-05  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/92280
	* match.pd (BIT_FIELD_REF of CTOR): Unless the original CTOR
	had a single use do not create a new CTOR.
	* tree-ssa-forwprop.c (simplify_bitfield_ref): Do not re-fold
	BIT_FIELD_REF of a CTOR via GENERIC.

From-SVN: r277832