re PR middle-end/70807 (fwprop pass ICE with incoming CDI_DOMINATORS)

re PR middle-end/70807 (fwprop pass ICE with incoming CDI_DOMINATORS)

gcc/

	PR middle-end/70807
	* cfgrtl.h (delete_insn_and_edges): Now return bool.
	* cfgrtl.c (delete_insn_and_edges): Likewise.
	* config/i386/i386.c (convert_scalars_to_vector): Remove
	redundant code.
	* cse.c (cse_insn): Compute cse_cfg_altered.
	(delete_trivially_dead_insns): Likewise.
	(cse_cc_succs): Likewise.
	(rest_of_handle_cse): Free dominance info if required.
	(rest_of_handle_cse2): Likewise.
	(rest_of_handle_cse_after_global_opts): Likewise.

gcc/testsuite/

	PR middle-end/70807
	* gcc.dg/pr70807.c: New test.

From-SVN: r236114