ipa-prop.c (determine_known_aggregate_parts): Skip writes to different declarations when tracking writes to a declaration.

2012-11-08  Martin Jambor  <mjambor@suse.cz>

	* ipa-prop.c (determine_known_aggregate_parts): Skip writes to
	different declarations when tracking writes to a declaration.

	* gfortran.dg/ipcp-array-1.f90: New test.

From-SVN: r193330