c-common.c (expand_tree_builtin): Ensure creal and cimag functions do not return lvalues.

	* c-common.c (expand_tree_builtin): Ensure creal and cimag
	functions do not return lvalues.

testsuite:
	* gcc.dg/builtins-28.c: New test.

From-SVN: r72727

gcc/ChangeLog

+2003-10-20  Joseph S. Myers  <jsm@polyomino.org.uk>
+
+	* c-common.c (expand_tree_builtin): Ensure creal and cimag
+	functions do not return lvalues.
+
 2003-10-20  Jason Merrill  <jason@redhat.com>
 
 	PR c/12553

gcc/c-common.c

@@ -3752,14 +3752,16 @@ expand_tree_builtin (tree function, tree params, tree coerced_params)
     case BUILT_IN_CREALL:
       if (coerced_params == 0)
 	return integer_zero_node;
-      return build_unary_op (REALPART_EXPR, TREE_VALUE (coerced_params), 0);
+      return non_lvalue (build_unary_op (REALPART_EXPR,
+					 TREE_VALUE (coerced_params), 0));
 
     case BUILT_IN_CIMAG:
     case BUILT_IN_CIMAGF:
     case BUILT_IN_CIMAGL:
       if (coerced_params == 0)
 	return integer_zero_node;
-      return build_unary_op (IMAGPART_EXPR, TREE_VALUE (coerced_params), 0);
+      return non_lvalue (build_unary_op (IMAGPART_EXPR,
+					 TREE_VALUE (coerced_params), 0));
 
     case BUILT_IN_ISGREATER:
       return expand_unordered_cmp (function, params, UNLE_EXPR, LE_EXPR);

gcc/testsuite/ChangeLog

+2003-10-20  Joseph S. Myers  <jsm@polyomino.org.uk>
+
+	* gcc.dg/builtins-28.c: New test.
+
 2003-10-20  Jan Hubicka  <jh@suse.cz>
 
 	* testsuite/g++.dg/opt/inline4.C: Do not use min-inline-insns

gcc/testsuite/gcc.dg/builtins-28.c

+/* Test that creal and cimag built-in functions do not return lvalues.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+extern float crealf (float _Complex);
+extern double creal (double _Complex);
+extern long double creall (long double _Complex);
+
+extern float cimagf (float _Complex);
+extern double cimag (double _Complex);
+extern long double cimagl (long double _Complex);
+
+float _Complex fc;
+double _Complex dc;
+long double _Complex ldc;
+
+void
+foo (void)
+{
+  crealf (fc) = 0; /* { dg-error "lvalue" "crealf not lvalue" } */
+  cimagf (fc) = 0; /* { dg-error "lvalue" "cimagf not lvalue" } */
+  creal (dc) = 0; /* { dg-error "lvalue" "creal not lvalue" } */
+  cimag (dc) = 0; /* { dg-error "lvalue" "cimag not lvalue" } */
+  creall (ldc) = 0; /* { dg-error "lvalue" "creall not lvalue" } */
+  cimagl (ldc) = 0; /* { dg-error "lvalue" "cimagl not lvalue" } */
+}