2012-08-08 Richard Guenther <rguenther@suse.de>

	* tree-call-cdce.c (check_pow): Simplify.
	(gen_conditions_for_pow_int_base): Likewise.
	* tree-ssa-dom.c (propagate_rhs_into_lhs): Do not handle
	virtual operands here.
	* tree-ssa-operands.c (get_name_decl): Remove unused function.
	* gimplify.c (gimple_regimplify_operands): Remove dead code.
	* tree-vrp.c (get_value_range): Move SSA_NAME_VAR access.
	* tree-parloops.c (create_phi_for_local_result): Use copy_ssa_name.
	* value-prof.c (gimple_ic): Use duplicate_ssa_name.
	(gimple_stringop_fixed_value): Likewise.
	* tree.c (needs_to_live_in_memory): Remove SSA name handling.
	* tree-stdarg.c (find_va_list_reference): Store SSA_NAME_VERSIONs
	in the bitmap alongside shifted DECL_UIDs.
	(va_list_counter_struct_op): Likewise.
	(va_list_ptr_read): Likewise.
	(va_list_ptr_write): Likewise.
	(check_va_list_escapes): Likewise.
	(check_all_va_list_escapes): Likewise.
	(execute_optimize_stdarg): Likewise.
	* tree-outof-ssa.c (insert_backedge_copies): Use copy_ssa_name.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@190229 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 7 insertions, 18 deletions

diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c
index 393aa26d270..d2a41284a2f 100644
--- a/gcc/tree-ssa-dom.c
+++ b/gcc/tree-ssa-dom.c
@@ -2687,18 +2687,13 @@ propagate_rhs_into_lhs (gimple stmt, tree lhs, tree rhs, bitmap interesting_name
 	  /* Special cases to avoid useless calls into the folding
 	     routines, operand scanning, etc.
 
-	     First, propagation into a PHI may cause the PHI to become
+	     Propagation into a PHI may cause the PHI to become
 	     a degenerate, so mark the PHI as interesting.  No other
-	     actions are necessary.
-
-	     Second, if we're propagating a virtual operand and the
-	     propagation does not change the underlying _DECL node for
-	     the virtual operand, then no further actions are necessary.  */
-	  if (gimple_code (use_stmt) == GIMPLE_PHI
-	      || (! is_gimple_reg (lhs)
-		  && TREE_CODE (rhs) == SSA_NAME
-		  && SSA_NAME_VAR (lhs) == SSA_NAME_VAR (rhs)))
+	     actions are necessary.  */
+	  if (gimple_code (use_stmt) == GIMPLE_PHI)
 	    {
+	      tree result;
+
 	      /* Dump details.  */
 	      if (dump_file && (dump_flags & TDF_DETAILS))
 		{
@@ -2706,14 +2701,8 @@ propagate_rhs_into_lhs (gimple stmt, tree lhs, tree rhs, bitmap interesting_name
 		  print_gimple_stmt (dump_file, use_stmt, 0, dump_flags);
 		}
 
-	      /* Propagation into a PHI may expose new degenerate PHIs,
-		 so mark the result of the PHI as interesting.  */
-	      if (gimple_code (use_stmt) == GIMPLE_PHI)
-		{
-		  tree result = get_lhs_or_phi_result (use_stmt);
-		  bitmap_set_bit (interesting_names, SSA_NAME_VERSION (result));
-		}
-
+	      result = get_lhs_or_phi_result (use_stmt);
+	      bitmap_set_bit (interesting_names, SSA_NAME_VERSION (result));
 	      continue;
 	    }