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Core 903

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Core 903
	* typeck.c (cp_build_binary_op): Pass original operands to
	null_ptr_cst_p, not those after the default conversions.

	* g++.dg/cpp0x/nullptr37.C: New test.

From-SVN: r240707
This commit is contained in:
Marek Polacek 2016-10-03 08:10:43 +00:00 committed by Marek Polacek
parent 1633d3b91a
commit f41f1ceba6
4 changed files with 96 additions and 8 deletions
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6
gcc/cp/ChangeLog
View File

@ -1,3 +1,9 @@
2016-10-03 Marek Polacek <polacek@redhat.com>
Core 903
* typeck.c (cp_build_binary_op): Pass original operands to
null_ptr_cst_p, not those after the default conversions.
2016-10-03 Bernd Edlinger <bernd.edlinger@hotmail.de>
* parser.c (cp_parser_condition): Fix a warning.

16
gcc/cp/typeck.c
View File

@ -4573,7 +4573,7 @@ cp_build_binary_op (location_t location,
|| code1 == COMPLEX_TYPE || code1 == ENUMERAL_TYPE))
short_compare = 1;
else if (((code0 == POINTER_TYPE || TYPE_PTRDATAMEM_P (type0))
&& null_ptr_cst_p (op1))
&& null_ptr_cst_p (orig_op1))
/* Handle, eg, (void*)0 (c++/43906), and more. */
|| (code0 == POINTER_TYPE
&& TYPE_PTR_P (type1) && integer_zerop (op1)))
@ -4587,7 +4587,7 @@ cp_build_binary_op (location_t location,
warn_for_null_address (location, op0, complain);
}
else if (((code1 == POINTER_TYPE || TYPE_PTRDATAMEM_P (type1))
&& null_ptr_cst_p (op0))
&& null_ptr_cst_p (orig_op0))
/* Handle, eg, (void*)0 (c++/43906), and more. */
|| (code1 == POINTER_TYPE
&& TYPE_PTR_P (type0) && integer_zerop (op0)))
@ -4604,7 +4604,7 @@ cp_build_binary_op (location_t location,
|| (TYPE_PTRDATAMEM_P (type0) && TYPE_PTRDATAMEM_P (type1)))
result_type = composite_pointer_type (type0, type1, op0, op1,
CPO_COMPARISON, complain);
else if (null_ptr_cst_p (op0) && null_ptr_cst_p (op1))
else if (null_ptr_cst_p (orig_op0) && null_ptr_cst_p (orig_op1))
/* One of the operands must be of nullptr_t type. */
result_type = TREE_TYPE (nullptr_node);
else if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE)
@ -4623,7 +4623,7 @@ cp_build_binary_op (location_t location,
else
return error_mark_node;
}
else if (TYPE_PTRMEMFUNC_P (type0) && null_ptr_cst_p (op1))
else if (TYPE_PTRMEMFUNC_P (type0) && null_ptr_cst_p (orig_op1))
{
if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_delta)
@ -4664,7 +4664,7 @@ cp_build_binary_op (location_t location,
}
result_type = TREE_TYPE (op0);
}
else if (TYPE_PTRMEMFUNC_P (type1) && null_ptr_cst_p (op0))
else if (TYPE_PTRMEMFUNC_P (type1) && null_ptr_cst_p (orig_op0))
return cp_build_binary_op (location, code, op1, op0, complain);
else if (TYPE_PTRMEMFUNC_P (type0) && TYPE_PTRMEMFUNC_P (type1))
{
@ -4877,21 +4877,21 @@ cp_build_binary_op (location_t location,
else if (code0 == POINTER_TYPE && code1 == POINTER_TYPE)
result_type = composite_pointer_type (type0, type1, op0, op1,
CPO_COMPARISON, complain);
else if (code0 == POINTER_TYPE && null_ptr_cst_p (op1))
else if (code0 == POINTER_TYPE && null_ptr_cst_p (orig_op1))
{
result_type = type0;
if (extra_warnings && (complain & tf_warning))
warning (OPT_Wextra,
"ordered comparison of pointer with integer zero");
}
else if (code1 == POINTER_TYPE && null_ptr_cst_p (op0))
else if (code1 == POINTER_TYPE && null_ptr_cst_p (orig_op0))
{
result_type = type1;
if (extra_warnings && (complain & tf_warning))
warning (OPT_Wextra,
"ordered comparison of pointer with integer zero");
}
else if (null_ptr_cst_p (op0) && null_ptr_cst_p (op1))
else if (null_ptr_cst_p (orig_op0) && null_ptr_cst_p (orig_op1))
/* One of the operands must be of nullptr_t type. */
result_type = TREE_TYPE (nullptr_node);
else if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE)

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2016-10-03 Marek Polacek <polacek@redhat.com>
* g++.dg/cpp0x/nullptr37.C: New test.
2016-10-03 Bernd Edlinger <bernd.edlinger@hotmail.de>
* c-c++-common/Wint-in-bool-context.c: Update test.

78
gcc/testsuite/g++.dg/cpp0x/nullptr37.C Normal file
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@ -0,0 +1,78 @@
/* PR c++/64767 */
// { dg-do compile { target c++11 } }
int
f1 (int *p, int **q)
{
int r = 0;
r += p == '\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += p == L'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += p == u'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += p == U'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += p != '\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += p != L'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += p != u'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += p != U'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += '\0' == p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += L'\0' == p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += u'\0' == p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += U'\0' == p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += '\0' != p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += L'\0' != p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += u'\0' != p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += U'\0' != p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += q == '\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += q == L'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += q == u'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += q == U'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += q != '\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += q != L'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += q != u'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += q != U'\0'; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += '\0' == q; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += L'\0' == q; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += u'\0' == q; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += U'\0' == q; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += '\0' != q; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += L'\0' != q; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += u'\0' != q; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += U'\0' != q; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
return r;
}
int
f2 (int *p)
{
int r = 0;
r += p == (void *) 0;
r += p != (void *) 0;
r += (void *) 0 == p;
r += (void *) 0 != p;
r += p == 0;
r += p != 0;
r += 0 == p;
r += 0 != p;
return r;
}
int
f3 (int *p)
{
int r = 0;
r += p == (char) 0; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += p != (char) 0; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += (char) 0 == p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
r += (char) 0 != p; // { dg-error "ISO C\\+\\+ forbids comparison between pointer and integer" }
return r;
}