tree-optimization/90994 - fix uninit diagnostics with EH

tree-optimization/90994 - fix uninit diagnostics with EH

r12-3640-g94c12ffac234b2 sneaked in a hack to avoid the diagnostic
for the testcase in PR90994 which sees non-call EH control flow
confusing predicate analysis.  The following patch instead adjusts
the existing code handling EH to handle non-calls and do what I
think was intented.

	PR tree-optimization/90994
	* gimple-predicate-analysis.cc (predicate::init_from_control_deps):
	Ignore exceptional control flow and skip the edge for the purpose of
	predicate generation also for non-calls.

	* g++.dg/torture/pr90994.C: New testcase.