re PR c++/82040 (ICE with -Wbool-operation and ~)

	PR c++/82040
	* typeck.c (cp_build_unary_op): Avoid re-entering reporting routines.

	* g++.dg/warn/Wbool-operation-1.C: New test.

From-SVN: r251581

gcc/cp/ChangeLog

+2017-09-01  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/82040
+	* typeck.c (cp_build_unary_op): Avoid re-entering reporting routines.
+
 2017-08-30  Jason Merrill  <jason@redhat.com>
 
 	PR c++/82029 - __PRETTY_FUNCTION__ in lambda in template

gcc/cp/typeck.c

@@ -5982,6 +5982,7 @@ cp_build_unary_op (enum tree_code code, tree xarg, bool noconvert,
 	{
 	  /* Warn if the expression has boolean value.  */
 	  if (TREE_CODE (TREE_TYPE (arg)) == BOOLEAN_TYPE
+	      && (complain & tf_warning)
 	      && warning_at (location, OPT_Wbool_operation,
 			     "%<~%> on an expression of type bool"))
 	    inform (location, "did you mean to use logical not (%<!%>)?");

gcc/testsuite/ChangeLog

+2017-09-01  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/82040
+	* g++.dg/warn/Wbool-operation-1.C: New test.
+
 2017-08-31  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* gcc.target/arc/sdata-5.c: New test.
-        * gcc.target/arc/arc700-stld-hazard.c: Update test options.
+	* gcc.target/arc/arc700-stld-hazard.c: Update test options.
 
 2017-08-31  Claudiu Zissulescu  <claziss@synopsys.com>
 

gcc/testsuite/g++.dg/warn/Wbool-operation-1.C

+// PR c++/82040
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wbool-operation" }
+
+template <class c>
+decltype (~c{})
+call ()
+{
+  return ~false; // { dg-warning "on an expression of type bool" }
+}
+template int call<bool>();