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re PR c++/53166 (static_assert produces bogus warning) 

/cp
2012-05-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/53166
	* pt.c (instantiate_class_template_1): Increase / decrease
	c_inhibit_evaluation_warnings around the tsubst_expr call
	for STATIC_ASSERT_CONDITION.
	(tsubst_expr, case STATIC_ASSERT): Likewise.
	* typeck.c (cp_build_binary_op, case EQ_EXPR/NE_EXPR): Check
	c_inhibit_evaluation_warnings in the OPT_Waddress warnings.

/testsuite
2012-05-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/53166
	* g++.dg/cpp0x/static_assert7.C: New.

From-SVN: r187165
This commit is contained in:
Paolo Carlini 2012-05-04 15:02:05 +00:00 committed by Paolo Carlini
parent 33e337e34d
commit fb4bcc8d65
5 changed files with 54 additions and 7 deletions
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10
gcc/cp/ChangeLog
View File

@ -1,3 +1,13 @@
2012-05-04 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/53166
* pt.c (instantiate_class_template_1): Increase / decrease
c_inhibit_evaluation_warnings around the tsubst_expr call
for STATIC_ASSERT_CONDITION.
(tsubst_expr, case STATIC_ASSERT): Likewise.
* typeck.c (cp_build_binary_op, case EQ_EXPR/NE_EXPR): Check
c_inhibit_evaluation_warnings in the OPT_Waddress warnings.
2012-05-03 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/53186

14
gcc/cp/pt.c
View File

@ -8950,10 +8950,15 @@ instantiate_class_template_1 (tree type)
/* Build new TYPE_FIELDS. */
if (TREE_CODE (t) == STATIC_ASSERT)
{
tree condition =
tree condition;
++c_inhibit_evaluation_warnings;
condition =
tsubst_expr (STATIC_ASSERT_CONDITION (t), args,
tf_warning_or_error, NULL_TREE,
/*integral_constant_expression_p=*/true);
--c_inhibit_evaluation_warnings;
finish_static_assert (condition,
STATIC_ASSERT_MESSAGE (t),
STATIC_ASSERT_SOURCE_LOCATION (t),
@ -13110,11 +13115,16 @@ tsubst_expr (tree t, tree args, tsubst_flags_t complain, tree in_decl,
case STATIC_ASSERT:
{
tree condition =
tree condition;
++c_inhibit_evaluation_warnings;
condition =
tsubst_expr (STATIC_ASSERT_CONDITION (t),
args,
complain, in_decl,
/*integral_constant_expression_p=*/true);
--c_inhibit_evaluation_warnings;
finish_static_assert (condition,
STATIC_ASSERT_MESSAGE (t),
STATIC_ASSERT_SOURCE_LOCATION (t),

6
gcc/cp/typeck.c
View File

@ -4081,7 +4081,8 @@ cp_build_binary_op (location_t location,
if (TREE_CODE (op0) == ADDR_EXPR
&& decl_with_nonnull_addr_p (TREE_OPERAND (op0, 0)))
{
if (complain & tf_warning)
if ((complain & tf_warning)
&& c_inhibit_evaluation_warnings == 0)
warning (OPT_Waddress, "the address of %qD will never be NULL",
TREE_OPERAND (op0, 0));
}
@ -4093,7 +4094,8 @@ cp_build_binary_op (location_t location,
if (TREE_CODE (op1) == ADDR_EXPR
&& decl_with_nonnull_addr_p (TREE_OPERAND (op1, 0)))
{
if (complain & tf_warning)
if ((complain & tf_warning)
&& c_inhibit_evaluation_warnings == 0)
warning (OPT_Waddress, "the address of %qD will never be NULL",
TREE_OPERAND (op1, 0));
}

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2012-05-04 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/53166
* g++.dg/cpp0x/static_assert7.C: New.
2012-05-04 Ulrich Weigand <ulrich.weigand@linaro.org>
PR tree-optimization/52633

20
gcc/testsuite/g++.dg/cpp0x/static_assert7.C Normal file
View File

@ -0,0 +1,20 @@
// PR c++/53166
// { dg-options "-std=c++11 -Waddress" }
template <typename X, X a>
struct A
{
static_assert (a != nullptr, "oops");
static_assert (nullptr != a, "oops");
int f()
{
static_assert (a != nullptr, "oops");
static_assert (nullptr != a, "oops");
return 1;
}
};
int i1;
A<int*, &i1> a1;
int i2 = a1.f();