tree-ssa-sccvn.c (visit_unary_op): Rename to ...

2010-11-16  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-sccvn.c (visit_unary_op): Rename to ...
	(visit_nary_op): ... this.
	(visit_binary_op): Remove.
	(visit_use): Adjust and handle GIMPLE_TERNARY_RHS.

	* gcc.dg/tree-ssa/ssa-fre-30.c: New testcase.

From-SVN: r166795

gcc/ChangeLog

 2010-11-16  Richard Guenther  <rguenther@suse.de>
 
+	* tree-ssa-sccvn.c (visit_unary_op): Rename to ...
+	(visit_nary_op): ... this.
+	(visit_binary_op): Remove.
+	(visit_use): Adjust and handle GIMPLE_TERNARY_RHS.
+
+2010-11-16  Richard Guenther  <rguenther@suse.de>
+
 	PR middle-end/45172
 	* tree-eh.c (cleanup_empty_eh_unsplit): Avoid creating duplicate
 	edges.

gcc/testsuite/ChangeLog

 2010-11-16  Richard Guenther  <rguenther@suse.de>
 
+	* gcc.dg/tree-ssa/ssa-fre-30.c: New testcase.
+
+2010-11-16  Richard Guenther  <rguenther@suse.de>
+
 	PR middle-end/45172
 	* gfortran.dg/gomp/pr45172.f90: New testcase.
 

gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-30.c

+/* { dg-do compile } */
+/* { dg-options "-O -ffinite-math-only -fdump-tree-optimized" } */
+
+float foo(float x, float y, float z)
+{
+  float a = __builtin_fmaf (x, y, z);
+  float b = __builtin_fmaf (x, y, z);
+  return a - b;
+}
+
+/* { dg-final { scan-tree-dump "return 0" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */

gcc/tree-ssa-sccvn.c

@@ -2167,41 +2167,17 @@ visit_copy (tree lhs, tree rhs)
   return set_ssa_val_to (lhs, rhs);
 }
 
-/* Visit a unary operator RHS, value number it, and return true if the
+/* Visit a nary operator RHS, value number it, and return true if the
    value number of LHS has changed as a result.  */
 
 static bool
-visit_unary_op (tree lhs, gimple stmt)
+visit_nary_op (tree lhs, gimple stmt)
 {
   bool changed = false;
   tree result = vn_nary_op_lookup_stmt (stmt, NULL);
 
   if (result)
-    {
-      changed = set_ssa_val_to (lhs, result);
-    }
-  else
-    {
-      changed = set_ssa_val_to (lhs, lhs);
-      vn_nary_op_insert_stmt (stmt, lhs);
-    }
-
-  return changed;
-}
-
-/* Visit a binary operator RHS, value number it, and return true if the
-   value number of LHS has changed as a result.  */
-
-static bool
-visit_binary_op (tree lhs, gimple stmt)
-{
-  bool changed = false;
-  tree result = vn_nary_op_lookup_stmt (stmt, NULL);
-
-  if (result)
-    {
-      changed = set_ssa_val_to (lhs, result);
-    }
+    changed = set_ssa_val_to (lhs, result);
   else
     {
       changed = set_ssa_val_to (lhs, lhs);
@@ -2909,10 +2885,9 @@ visit_use (tree use)
 		  switch (get_gimple_rhs_class (gimple_assign_rhs_code (stmt)))
 		    {
 		    case GIMPLE_UNARY_RHS:
-		      changed = visit_unary_op (lhs, stmt);
-		      break;
 		    case GIMPLE_BINARY_RHS:
-		      changed = visit_binary_op (lhs, stmt);
+		    case GIMPLE_TERNARY_RHS:
+		      changed = visit_nary_op (lhs, stmt);
 		      break;
 		    case GIMPLE_SINGLE_RHS:
 		      switch (TREE_CODE_CLASS (gimple_assign_rhs_code (stmt)))
@@ -2921,10 +2896,10 @@ visit_use (tree use)
 			  /* VOP-less references can go through unary case.  */
 			  if ((gimple_assign_rhs_code (stmt) == REALPART_EXPR
 			       || gimple_assign_rhs_code (stmt) == IMAGPART_EXPR
-			       || gimple_assign_rhs_code (stmt) == VIEW_CONVERT_EXPR )
+			       || gimple_assign_rhs_code (stmt) == VIEW_CONVERT_EXPR)
 			      && TREE_CODE (TREE_OPERAND (gimple_assign_rhs1 (stmt), 0)) == SSA_NAME)
 			    {
-			      changed = visit_unary_op (lhs, stmt);
+			      changed = visit_nary_op (lhs, stmt);
 			      break;
 			    }
 			  /* Fallthrough.  */
@@ -2935,7 +2910,7 @@ visit_use (tree use)
 			case tcc_expression:
 			  if (gimple_assign_rhs_code (stmt) == ADDR_EXPR)
 			    {
-			      changed = visit_unary_op (lhs, stmt);
+			      changed = visit_nary_op (lhs, stmt);
 			      break;
 			    }
 			  /* Fallthrough.  */