2013-09-20 Richard Biener <rguenther@suse.de>

2013-09-20  Richard Biener  <rguenther@suse.de>

	PR middle-end/58484
	* tree-scalar-evolution.c (struct scev_info_str): Shrink by
	remembering SSA name version and block index.
	(new_scev_info_str): Adjust.
	(hash_scev_info): Likewise.  Also hash the block index.
	(eq_scev_info): Adjust.
	(find_var_scev_info): Likewise.
	(struct instantiate_cache_entry): Remove.
	(struct instantiate_cache_type): Use a htab to map name, block
	to chrec.
	(instantiate_cache_type::~instantiate_cache_type): Adjust.
	(get_instantiated_value_entry): Likewise.
	(hash_idx_scev_info, eq_idx_scev_info): New functions.
	(instantiate_scev_name): Adjust.

	* gfortran.dg/pr58484.f: New testcase.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@202790 138bc75d-0d04-0410-961f-82ee72b054a4