2009-03-30 Paolo Bonzini <bonzini@gnu.org>

        * fold-const.c (const_binop, fold_convert_const_real_from_fixed,
        fold_convert_const_fixed_from_fixed,
        fold_convert_const_fixed_from_int,
        fold_convert_const_fixed_from_real, fold_negate_const): Do not
        set TREE_CONSTANT_OVERFLOW.
        * tree.def: Remove mention of TREE_CONSTANT_OVERFLOW.
        * tree.h (TREE_CONSTANT_OVERFLOW): Delete.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@145281 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 5 insertions, 32 deletions

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index a68b7b8637d..a56e885fbf8 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -1932,12 +1932,7 @@ const_binop (enum tree_code code, tree arg1, tree arg2, int notrunc)
       t = build_fixed (type, result);
       /* Propagate overflow flags.  */
       if (overflow_p | TREE_OVERFLOW (arg1) | TREE_OVERFLOW (arg2))
-	{
-	  TREE_OVERFLOW (t) = 1;
-	  TREE_CONSTANT_OVERFLOW (t) = 1;
-	}
-      else if (TREE_CONSTANT_OVERFLOW (arg1) | TREE_CONSTANT_OVERFLOW (arg2))
-	TREE_CONSTANT_OVERFLOW (t) = 1;
+	TREE_OVERFLOW (t) = 1;
       return t;
     }
 
@@ -2304,8 +2299,6 @@ fold_convert_const_real_from_fixed (tree type, const_tree arg1)
   t = build_real (type, value);
 
   TREE_OVERFLOW (t) = TREE_OVERFLOW (arg1);
-  TREE_CONSTANT_OVERFLOW (t)
-    = TREE_OVERFLOW (t) | TREE_CONSTANT_OVERFLOW (arg1);
   return t;
 }
 
@@ -2325,12 +2318,7 @@ fold_convert_const_fixed_from_fixed (tree type, const_tree arg1)
 
   /* Propagate overflow flags.  */
   if (overflow_p | TREE_OVERFLOW (arg1))
-    {
-      TREE_OVERFLOW (t) = 1;
-      TREE_CONSTANT_OVERFLOW (t) = 1;
-    }
-  else if (TREE_CONSTANT_OVERFLOW (arg1))
-    TREE_CONSTANT_OVERFLOW (t) = 1;
+    TREE_OVERFLOW (t) = 1;
   return t;
 }
 
@@ -2352,12 +2340,7 @@ fold_convert_const_fixed_from_int (tree type, const_tree arg1)
 
   /* Propagate overflow flags.  */
   if (overflow_p | TREE_OVERFLOW (arg1))
-    {
-      TREE_OVERFLOW (t) = 1;
-      TREE_CONSTANT_OVERFLOW (t) = 1;
-    }
-  else if (TREE_CONSTANT_OVERFLOW (arg1))
-    TREE_CONSTANT_OVERFLOW (t) = 1;
+    TREE_OVERFLOW (t) = 1;
   return t;
 }
 
@@ -2378,12 +2361,7 @@ fold_convert_const_fixed_from_real (tree type, const_tree arg1)
 
   /* Propagate overflow flags.  */
   if (overflow_p | TREE_OVERFLOW (arg1))
-    {
-      TREE_OVERFLOW (t) = 1;
-      TREE_CONSTANT_OVERFLOW (t) = 1;
-    }
-  else if (TREE_CONSTANT_OVERFLOW (arg1))
-    TREE_CONSTANT_OVERFLOW (t) = 1;
+    TREE_OVERFLOW (t) = 1;
   return t;
 }
 
@@ -15228,12 +15206,7 @@ fold_negate_const (tree arg0, tree type)
 	t = build_fixed (type, f);
 	/* Propagate overflow flags.  */
 	if (overflow_p | TREE_OVERFLOW (arg0))
-	  {
-	    TREE_OVERFLOW (t) = 1;
-	    TREE_CONSTANT_OVERFLOW (t) = 1;
-	  }
-	else if (TREE_CONSTANT_OVERFLOW (arg0))
-	  TREE_CONSTANT_OVERFLOW (t) = 1;
+	  TREE_OVERFLOW (t) = 1;
 	break;
       }