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* tree-flow.h: Remove some prototypes.
* tree-ssa-dce.c (mark_virtual_operand_for_renaming,
mark_virtual_phi_result_for_renaming): Move to tree-into-ssa.c.
* tree-into-ssa.c (mark_virtual_operand_for_renaming,
mark_virtual_phi_result_for_renaming): Relocate here.
* tree-into-ssa.h: Add prototypes.
* tree-ssa-phiopt.c: (tree_ssa_phiopt_worker) Use
single_pred_before_succ_order.
(blocks_in_phiopt_order): Rename and move to cfganal.c.
(nonfreeing_call_p) Move to gimple.c.
* cfganal.c (single_pred_before_succ_order): Move and renamed from
tree-ssa-phiopt.c.
* basic-block.h (single_pred_before_succ_order): Add prototype.
* gimple.c (nonfreeing_call_p): Relocate here.
* gimple.h: Add prototype.
* tree-ssa-ifcombine.c: Include tree-ssa-phiopt.h.
* tree-ssa-dom.h: New file. Relocate prototypes here.
* tree-ssa.h: Include tree-ssa-dom.h.
From-SVN: r203122
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