re PR rtl-optimization/25799 (cc1 stalled with -O1 -fmodulo-sched)

re PR rtl-optimization/25799 (cc1 stalled with -O1 -fmodulo-sched)

2005-01-19  Kenneth Zadeck <zadeck@naturalbridge.com>

	PR rtl-optimization/25799
	* df-problems.c (df_ru_confluence_n, df_rd_confluence_n):
	Corrected confluence operator to remove bits from op2 before oring
	with op1 rather than removing bits from op1.
        * (df_ru_transfer_function): Corrected test on wrong bitmap which
	caused infinite loop.  Both of these problems were introduced in
	the dataflow rewrite.

From-SVN: r110007