[PR103024,PR103530] support throwing compares and non-boolean types

[PR103024,PR103530] support throwing compares and non-boolean types

This patch adjusts the harden-compares pass to cope with compares that
end basic blocks, and to accept non-boolean integral types whose
conversion to boolean may have been discarded.

for  gcc/ChangeLog

	PR tree-optimization/103024
	PR middle-end/103530
	* gimple-harden-conditionals.cc (non_eh_succ_edge): New.
	(pass_harden_compares::execute): Accept 1-bit integral types,
	and cope with throwing compares.

for  gcc/testsuite/ChangeLog

	PR tree-optimization/103024
	PR middle-end/103530
	* g++.dg/pr103024.C: New.
	* g++.dg/pr103530.C: New.