re PR rtl-optimization/26235 (FAIL: gcc.c-torture/execute/ieee/fp-cmp-8l.c execution at -O1, -O2 and -Os)

	PR rtl-optimization/26235
	* loop-invariant.c (hash_invariant_expr_1): Handle 'i' and 'n' formats.
	(invariant_expr_equal_p): Handle 'i' and 'n' formats.  Fail on unknown
	format.

From-SVN: r110939