2019-01-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/88739
	* tree-cfg.c (verify_types_in_gimple_reference): Verify
	BIT_FIELD_REFs only are applied to mode-precision operands
	when they are integral.
	(verify_gimple_assign_ternary): Likewise for BIT_INSERT_EXPR.
	* tree-ssa-sccvn.c (vn_reference_lookup_3): Avoid generating
	BIT_FIELD_REFs of non-mode-precision integral operands.

From-SVN: r268332