re PR c++/36069 (Strange "warning: suggest parentheses around assignment used as…

re PR c++/36069 (Strange "warning: suggest parentheses around assignment used as truth value" with volatile/non volatile bools)

2009-08-05  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR c++/36069
cp/
	* typeck.c (convert_for_assignment): Do not warn for any boolean
	variant. Use explicit location.
testsuite/
	* g++.dg/warn/pr36069.C: New.

From-SVN: r150471

gcc/cp/ChangeLog

+2009-08-05  Manuel López-Ibáñez  <manu@gcc.gnu.org>
+
+	PR c++/36069
+	* typeck.c (convert_for_assignment): Do not warn for any boolean
+	variant. Use explicit location.
+
 2009-08-04  Dodji Seketeli  <dodji@redhat.com>
 
 	PR c++/39987

gcc/cp/typeck.c

@@ -6790,11 +6790,14 @@ convert_for_assignment (tree type, tree rhs,
       && type == boolean_type_node
       && TREE_CODE (rhs) == MODIFY_EXPR
       && !TREE_NO_WARNING (rhs)
-      && TREE_TYPE (rhs) != boolean_type_node
+      && TREE_CODE (TREE_TYPE (rhs)) != BOOLEAN_TYPE
       && (complain & tf_warning))
     {
-      warning (OPT_Wparentheses,
-	       "suggest parentheses around assignment used as truth value");
+      location_t loc = EXPR_HAS_LOCATION (rhs) 
+	? EXPR_LOCATION (rhs) : input_location;
+
+      warning_at (loc, OPT_Wparentheses,
+		  "suggest parentheses around assignment used as truth value");
       TREE_NO_WARNING (rhs) = 1;
     }
 

gcc/testsuite/ChangeLog

+2009-08-05  Manuel López-Ibáñez  <manu@gcc.gnu.org>
+
+	PR c++/36069
+	* g++.dg/warn/pr36069.C: New.
+
 2009-08-04  Dodji Seketeli  <dodji@redhat.com>
 
 	PR c++/39987

gcc/testsuite/g++.dg/warn/pr36069.C

+// PR c++/36069 Strange "warning: suggest parentheses around
+// assignment used as truth value" with volatile/non volatile bools
+// { dg-do compile }
+// { dg-options "-Wparentheses" }
+struct foo {
+  bool a;
+  volatile bool b,c;  
+  foo() { a = b = c = false; } // { dg-bogus "parentheses" }
+};
+
+int main() {
+  bool a;
+  volatile bool b,c;
+  a = b = c = false; // { dg-bogus "parentheses" }
+  foo A;
+}