(fold): Don't assume a nonexplicit constant cannot equal an explicit one.

From-SVN: r13650

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 1b49128d1b1a7c7edbf7c8b48be9fb701aa9f905..f75d479637e9b0d335383fc6e8761407960460e0 100644 (file)
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -5335,6 +5335,7 @@ fold (expr)
                              0);
        }
 
+#if 0 /* This is no longer useful, but breaks some real code.  */
       /* Assume a nonexplicit constant cannot equal an explicit one,
         since such code would be undefined anyway.
         Exception: on sysvr4, using #pragma weak,
@@ -5345,7 +5346,7 @@ fold (expr)
               && TREE_CODE (arg0) == ADDR_EXPR
               && code == EQ_EXPR)
        t1 = build_int_2 (0, 0);
-
+#endif
       /* Two real constants can be compared explicitly.  */
       else if (TREE_CODE (arg0) == REAL_CST && TREE_CODE (arg1) == REAL_CST)
        {