re PR middle-end/27116 (Incorrect integer division (wrong sign).)

[gcc.git] / gcc / ChangeLog

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+2006-06-16  Richard Guenther  <rguenther@suse.de>
+
+       PR middle-end/27116
+       * fold-const.c (negate_expr_p): Do not introduce undefined
+       overflow in negating INTEGER_CSTs.
+       (fold_negate_expr): Rename from negate_expr.  Revert last
+       change for folding BIT_NOT_EXPR.  Change semantics to
+       return NULL_TREE for non-simplified negations.  Do not
+       strip type conversions and unify type handling.
+       (negate_expr): New function, wrap around fold_negate_expr
+       but ensure building a tree always.  Strip type conversions
+       here, fold to result type.
+       (fold_unary): Use fold_negate_expr for folding NEGATE_EXPR.
+
 2006-06-16  Roger Sayle  <roger@eyesopen.com>
 
        PR middle-end/27802