2011-06-16  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/49343
	* tree-sra.c (build_ref_for_model): Use component_ref_field_offset to
	calculate offset, provide 2nd operand for the new COMPONENT_REF.

	* testsuite/gnat.dg/discr31.adb: New test.
	* testsuite/gnat.dg/discr31.ads: Likewise.

From-SVN: r175111