* fold-const.c (negate_expr_p, fold_negate_expr): Handle

	COMPLEX_EXPR.
	
testsuite:
	* gcc.dg/builtins-20.c: Add more cases.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@121511 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 11 insertions, 0 deletions

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index e587ea94034..241e9dc5ea5 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -1011,6 +1011,10 @@ negate_expr_p (tree t)
       return negate_expr_p (TREE_REALPART (t))
 	     && negate_expr_p (TREE_IMAGPART (t));
 
+    case COMPLEX_EXPR:
+      return negate_expr_p (TREE_OPERAND (t, 0))
+	     && negate_expr_p (TREE_OPERAND (t, 1));
+
     case PLUS_EXPR:
       if (HONOR_SIGN_DEPENDENT_ROUNDING (TYPE_MODE (type))
 	  || HONOR_SIGNED_ZEROS (TYPE_MODE (type)))
@@ -1134,6 +1138,13 @@ fold_negate_expr (tree t)
       }
       break;
 
+    case COMPLEX_EXPR:
+      if (negate_expr_p (t))
+	return fold_build2 (COMPLEX_EXPR, type,
+			    fold_negate_expr (TREE_OPERAND (t, 0)),
+			    fold_negate_expr (TREE_OPERAND (t, 1)));
+      break;
+      
     case NEGATE_EXPR:
       return TREE_OPERAND (t, 0);