fold-const.c (fold): Fix thinko when optimizing comparisons against -0.0.

        * fold-const.c (fold): Fix thinko when optimizing comparisons
        against -0.0.

From-SVN: r30282

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f77c788..1d60c3a 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Sat Oct 30 22:19:26 1999  Jeffrey A Law  (law@cygnus.com)
+
+       * fold-const.c (fold): Fix thinko when optimizing comparisons
+       against -0.0.
+
 Sat Oct 30 21:32:17 1999  David Starner  <dstarner98@aasaa.ofe.org>
 
        * gcc.texi (Passes): Update front-end files to their current 

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index f633fa8..49f61b8 100644 (file)
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -5751,7 +5751,8 @@ fold (expr)
                                  REAL_VALUE_NEGATE (TREE_REAL_CST (arg1)))));
          /* IEEE doesn't distinguish +0 and -0 in comparisons.  */
          /* a CMP (-0) -> a CMP 0  */
-         if (REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (arg1)))
+         if (TREE_CODE (arg1) == REAL_CST
+             && REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (arg1)))
            return fold (build (code, type, arg0,
                                build_real (TREE_TYPE (arg1), dconst0)));
        }