re PR c++/79184 (-Wint-in-bool-context triggered erroneously in template parameter)

	PR c++/79184
	* cvt.c (ocp_convert): Add a sentinel against -Wint-in-bool-context
	if warnings shouldn't be given.

	* g++.dg/warn/Wint-in-bool-context-1.C: New.

From-SVN: r245335

gcc/cp/ChangeLog

@@ -4,6 +4,10 @@
 	* pt.c (type_dependent_expression_p): Check if the expression type
 	is null.
 
+	PR c++/79184
+	* cvt.c (ocp_convert): Add a sentinel against -Wint-in-bool-context
+	if warnings shouldn't be given.
+
 2017-02-10  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/71737

gcc/cp/cvt.c

@@ -798,7 +798,15 @@ ocp_convert (tree type, tree expr, int convtype, int flags,
 	     to the underlying type first.  */
 	  if (SCOPED_ENUM_P (intype) && (convtype & CONV_STATIC))
 	    e = build_nop (ENUM_UNDERLYING_TYPE (intype), e);
-	  return cp_truthvalue_conversion (e);
+	  if (complain & tf_warning)
+	    return cp_truthvalue_conversion (e);
+	  else
+	    {
+	      /* Prevent bogus -Wint-in-bool-context warnings coming
+		 from c_common_truthvalue_conversion down the line.  */
+	      warning_sentinel w (warn_int_in_bool_context);
+	      return cp_truthvalue_conversion (e);
+	    }
 	}
 
       converted = convert_to_integer_maybe_fold (type, e, dofold);

gcc/testsuite/ChangeLog

@@ -3,6 +3,9 @@
 	PR c++/79435
 	* g++.dg/cpp1y/pr79435.C: New.
 
+	PR c++/79184
+	* g++.dg/warn/Wint-in-bool-context-1.C: New.
+
 2017-02-10  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	* gcc.target/aarch64/advsimd-intrinsics/p64_p128.c

gcc/testsuite/g++.dg/warn/Wint-in-bool-context-1.C

+// PR c++/79184
+// { dg-do compile }
+// { dg-options "-Wint-in-bool-context" }
+
+enum { E = 2 };
+template <bool> void f(int) { }
+template <int> void f() {}
+
+int
+main ()
+{
+  f<1 * 1>(); // { dg-bogus "in boolean context" }
+  f<1 << 1>(); // { dg-bogus "in boolean context" }
+  f<1 ? 3 : 2>(); // { dg-bogus "in boolean context" }
+  f<E>(); // { dg-bogus "in boolean context" }
+}