* 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.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@203122 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 40 insertions, 0 deletions

diff --git a/gcc/tree-into-ssa.c b/gcc/tree-into-ssa.c
index 2f5ac69251e..5a04ee7924f 100644
--- a/gcc/tree-into-ssa.c
+++ b/gcc/tree-into-ssa.c
@@ -2869,6 +2869,46 @@ mark_virtual_operands_for_renaming (struct function *fn)
   fn->gimple_df->rename_vops = 1;
 }
 
+/* Replace all uses of NAME by underlying variable and mark it
+   for renaming.  This assumes the defining statement of NAME is
+   going to be removed.  */
+
+void
+mark_virtual_operand_for_renaming (tree name)
+{
+  tree name_var = SSA_NAME_VAR (name);
+  bool used = false;
+  imm_use_iterator iter;
+  use_operand_p use_p;
+  gimple stmt;
+
+  gcc_assert (VAR_DECL_IS_VIRTUAL_OPERAND (name_var));
+  FOR_EACH_IMM_USE_STMT (stmt, iter, name)
+    {
+      FOR_EACH_IMM_USE_ON_STMT (use_p, iter)
+        SET_USE (use_p, name_var);
+      used = true;
+    }
+  if (used)
+    mark_virtual_operands_for_renaming (cfun);
+}
+
+/* Replace all uses of the virtual PHI result by its underlying variable
+   and mark it for renaming.  This assumes the PHI node is going to be
+   removed.  */
+
+void
+mark_virtual_phi_result_for_renaming (gimple phi)
+{
+  if (dump_file && (dump_flags & TDF_DETAILS))
+    {
+      fprintf (dump_file, "Marking result for renaming : ");
+      print_gimple_stmt (dump_file, phi, 0, TDF_SLIM);
+      fprintf (dump_file, "\n");
+    }
+
+  mark_virtual_operand_for_renaming (gimple_phi_result (phi));
+}
 
 /* Return true if there is any work to be done by update_ssa
    for function FN.  */