* fold-const.c (operand_equal_p): Pass flags in recursive calls for

	binary and relational operations.  Add support for TRUTH_ANDIF_EXPR,
	TRUTH_ORIF_EXPR, TRUTH_AND_EXPR, TRUTH_OR_EXPR and TRUTH_XOR_EXPR.
	* tree.c (commutative_tree_code): Also list UNORDERED_EXPR,
	ORDERED_EXPR, UNEQ_EXPR, LTGT_EXPR, TRUTH_AND_EXPR, TRUTH_OR_EXPR
	and TRUTH_XOR_EXPR.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@83433 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 87ddfc7..6fb2d9e 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2004-06-21  Roger Sayle  <roger@eyesopen.com>
+
+       * fold-const.c (operand_equal_p): Pass flags in recursive calls for
+       binary and relational operations.  Add support for TRUTH_ANDIF_EXPR,
+       TRUTH_ORIF_EXPR, TRUTH_AND_EXPR, TRUTH_OR_EXPR and TRUTH_XOR_EXPR.
+       * tree.c (commutative_tree_code): Also list UNORDERED_EXPR,
+       ORDERED_EXPR, UNEQ_EXPR, LTGT_EXPR, TRUTH_AND_EXPR, TRUTH_OR_EXPR
+       and TRUTH_XOR_EXPR.
+
 2004-06-21  Paolo Bonzini  <bonzini@gnu.org>
 
        * rtlanal.c (may_trap_p): Mark LTGT as trapping.

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 517d550..68c9722 100644 (file)
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -2454,9 +2454,10 @@ operand_equal_p (tree arg0, tree arg1, unsigned int flags)
 
     case '<':
     case '2':
-      if (operand_equal_p (TREE_OPERAND (arg0, 0), TREE_OPERAND (arg1, 0), 0)
-         && operand_equal_p (TREE_OPERAND (arg0, 1), TREE_OPERAND (arg1, 1),
-                             0))
+      if (operand_equal_p (TREE_OPERAND (arg0, 0),
+                          TREE_OPERAND (arg1, 0), flags)
+         && operand_equal_p (TREE_OPERAND (arg0, 1),
+                             TREE_OPERAND (arg1, 1), flags))
        return 1;
 
       /* For commutative ops, allow the other order.  */
@@ -2506,6 +2507,25 @@ operand_equal_p (tree arg0, tree arg1, unsigned int flags)
          return operand_equal_p (TREE_OPERAND (arg0, 0),
                                  TREE_OPERAND (arg1, 0), flags);
 
+       case TRUTH_ANDIF_EXPR:
+       case TRUTH_ORIF_EXPR:
+         return operand_equal_p (TREE_OPERAND (arg0, 0),
+                                 TREE_OPERAND (arg1, 0), flags)
+                && operand_equal_p (TREE_OPERAND (arg0, 1),
+                                    TREE_OPERAND (arg1, 1), flags);
+
+       case TRUTH_AND_EXPR:
+       case TRUTH_OR_EXPR:
+       case TRUTH_XOR_EXPR:
+         return (operand_equal_p (TREE_OPERAND (arg0, 0),
+                                  TREE_OPERAND (arg1, 0), flags)
+                 && operand_equal_p (TREE_OPERAND (arg0, 1),
+                                     TREE_OPERAND (arg1, 1), flags))
+                || (operand_equal_p (TREE_OPERAND (arg0, 0),
+                                     TREE_OPERAND (arg1, 1), flags)
+                    && operand_equal_p (TREE_OPERAND (arg0, 1),
+                                        TREE_OPERAND (arg1, 0), flags));
+
        case RTL_EXPR:
          return rtx_equal_p (RTL_EXPR_RTL (arg0), RTL_EXPR_RTL (arg1));
 

diff --git a/gcc/tree.c b/gcc/tree.c
index bb7ed19..fb1f4d7 100644 (file)
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -3792,6 +3792,13 @@ commutative_tree_code (enum tree_code code)
     case BIT_AND_EXPR:
     case NE_EXPR:
     case EQ_EXPR:
+    case UNORDERED_EXPR:
+    case ORDERED_EXPR:
+    case UNEQ_EXPR:
+    case LTGT_EXPR:
+    case TRUTH_AND_EXPR:
+    case TRUTH_XOR_EXPR:
+    case TRUTH_OR_EXPR:
       return true;
 
     default: