re PR tree-optimization/58984 (wrong code at -Os and above on x86_64-linux-gnu in...

re PR tree-optimization/58984 (wrong code at -Os and above on x86_64-linux-gnu in 64-bit mode)

	PR tree-optimization/58984
	* ipa-prop.c (ipa_load_from_parm_agg_1): Add SIZE_P argument,
	set *SIZE_P if non-NULL on success.
	(ipa_load_from_parm_agg, ipa_analyze_indirect_call_uses): Adjust
	callers.
	(ipcp_transform_function): Likewise.  Punt if size of access
	is different from TYPE_SIZE on v->value's type.

	* gcc.c-torture/execute/pr58984.c: New test.

From-SVN: r204385