Fix PR45230, PR45231, and PR45370: fold_stmt_inplace after replace_exp.

Fix PR45230, PR45231, and PR45370: fold_stmt_inplace after replace_exp.

2010-12-08  Richard Guenther  <rguenther@suse.de>
	    Sebastian Pop  <sebastian.pop@amd.com>

	PR tree-optimization/45230
	PR tree-optimization/45231
	PR tree-optimization/45370
	* sese.c (rename_uses): Returns a bool.  Call
	recompute_tree_invariant_for_addr_expr only on the RHS of a
	GIMPLE_ASSIGN.
	(graphite_copy_stmts_from_block): Call fold_stmt_inplace when
	rename_uses returns true.
	* tree-ssa-copy.c (replace_exp): Add a comment about calling
	fold_stmt_inplace after replace_exp.

	* gcc.dg/graphite/id-pr45230-1.c: New.
	* gcc.dg/graphite/id-pr45231.c: New.
	* gfortran.dg/graphite/id-pr45370.f90: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@167609 138bc75d-0d04-0410-961f-82ee72b054a4