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PR c++/94923 - False positive -Wclass-memaccess with trivially copyable std::optional 

gcc/cp/ChangeLog:

	PR c++/94923
	* call.c ((maybe_warn_class_memaccess): Use is_byte_access_type.
	* cp-tree.h (is_dummy_object): Return bool.
	(is_byte_access_type): Declare new function.
	* tree.c (is_dummy_object): Return bool.
	(is_byte_access_type): Define new function.

gcc/testsuite/ChangeLog:

	PR c++/94923
	* g++.dg/Wclass-memaccess.C: Add tests for std::byte.
This commit is contained in:
Martin Sebor 2020-05-19 12:46:37 -06:00
parent ed63c387aa
commit c0d8623ce5
6 changed files with 183 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
gcc/cp/ChangeLog
View File

@ -1,3 +1,12 @@
2020-05-18 Martin Sebor <msebor@redhat.com>
PR c++/94923
* call.c ((maybe_warn_class_memaccess): Use is_byte_access_type.
* cp-tree.h (is_dummy_object): Return bool.
(is_byte_access_type): Declare new function.
* tree.c (is_dummy_object): Return bool.
(is_byte_access_type): Define new function.
2020-05-19 Patrick Palka <ppalka@redhat.com>
PR c++/87847

4
gcc/cp/call.c
View File

@ -9509,7 +9509,7 @@ maybe_warn_class_memaccess (location_t loc, tree fndecl,
else if (!trivial
&& !VOID_TYPE_P (srctype)
&& !char_type_p (TYPE_MAIN_VARIANT (srctype))
&& !is_byte_access_type (srctype)
&& !same_type_ignoring_top_level_qualifiers_p (desttype,
srctype))
{
@ -9522,7 +9522,7 @@ maybe_warn_class_memaccess (location_t loc, tree fndecl,
}
else if (fld
&& !VOID_TYPE_P (srctype)
&& !char_type_p (TYPE_MAIN_VARIANT (srctype))
&& !is_byte_access_type (srctype)
&& !same_type_ignoring_top_level_qualifiers_p (desttype,
srctype))
{

3
gcc/cp/cp-tree.h
View File

@ -7460,7 +7460,8 @@ extern tree no_linkage_check (tree, bool);
extern void debug_binfo (tree);
extern tree build_dummy_object (tree);
extern tree maybe_dummy_object (tree, tree *);
extern int is_dummy_object (const_tree);
extern bool is_dummy_object (const_tree);
extern bool is_byte_access_type (tree);
extern const struct attribute_spec cxx_attribute_table[];
extern tree make_ptrmem_cst (tree, tree);
extern tree cp_build_type_attribute_variant (tree, tree);

24
gcc/cp/tree.c
View File

@ -1062,13 +1062,7 @@ build_cplus_array_type (tree elt_type, tree index_type)
}
else
{
bool typeless_storage
= (elt_type == unsigned_char_type_node
|| elt_type == signed_char_type_node
|| elt_type == char_type_node
|| (TREE_CODE (elt_type) == ENUMERAL_TYPE
&& TYPE_CONTEXT (elt_type) == std_node
&& !strcmp ("byte", TYPE_NAME_STRING (elt_type))));
bool typeless_storage = is_byte_access_type (elt_type);
t = build_array_type (elt_type, index_type, typeless_storage);
}
@ -4047,7 +4041,7 @@ maybe_dummy_object (tree type, tree* binfop)
/* Returns 1 if OB is a placeholder object, or a pointer to one. */
int
bool
is_dummy_object (const_tree ob)
{
if (INDIRECT_REF_P (ob))
@ -4056,6 +4050,20 @@ is_dummy_object (const_tree ob)
&& TREE_OPERAND (ob, 0) == void_node);
}
/* Returns true if TYPE is a character type or std::byte. */
bool
is_byte_access_type (tree type)
{
type = TYPE_MAIN_VARIANT (type);
if (char_type_p (type))
return true;
return (TREE_CODE (type) == ENUMERAL_TYPE
&& TYPE_CONTEXT (type) == std_node
&& !strcmp ("byte", TYPE_NAME_STRING (type)));
}
/* Returns 1 iff type T is something we want to treat as a scalar type for
the purpose of deciding whether it is trivial/POD/standard-layout. */

5
gcc/testsuite/ChangeLog
View File

@ -188,6 +188,11 @@
* g++.dg/cpp1z/constexpr-if34.C: New test.
* g++.dg/cpp2a/is-constant-evaluated10.C: New test.
2020-05-18 Martin Sebor <msebor@redhat.com>
PR c++/94923
* g++.dg/Wclass-memaccess.C: Add tests for std::byte.
2020-05-18 Martin Sebor <msebor@redhat.com>
PR middle-end/92815

174
gcc/testsuite/g++.dg/Wclass-memaccess.C
View File

@ -14,6 +14,15 @@ void* memset (void*, int, size_t);
void* realloc (void*, size_t);
}
namespace std {
#if __cplusplus >= 201103L
enum class byte: unsigned char { };
#else
typedef unsigned char byte;
#endif
}
/* Ordinary bzcopy and bzero aren't recognized as special. */
#define bcopy __builtin_bcopy
#define bzero __builtin_bzero
@ -180,7 +189,8 @@ void TrivialAccess::test_member (const TrivialAccess *q, int i)
struct HasDefault { char a[4]; HasDefault (); };
void test (HasDefault *p, const HasDefault &x,
void *q, const unsigned char *s, const int ia[])
void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -208,21 +218,25 @@ void test (HasDefault *p, const HasDefault &x,
T (bcopy, (q, p, n));
T (bcopy, (s, p, sizeof *p));
T (bcopy, (s, p, n));
T (bcopy, (b, p, n));
T (memcpy, (p, q, sizeof *p));
T (memcpy, (p, q, n));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, s, n));
T (memcpy, (p, b, n));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, q, n));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, s, n));
T (memmove, (p, b, n));
T (mempcpy, (p, q, sizeof *p));
T (mempcpy, (p, q, n));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, s, n));
T (mempcpy, (p, b, n));
// ...but partial copies are diagnosed.
T (memcpy, (p, &x, 1)); // { dg-warning "writing to an object of a non-trivial type .struct HasDefault. leaves 3 bytes unchanged" } */
@ -259,7 +273,8 @@ struct HasTemplateDefault
};
void test (HasTemplateDefault *p, const HasTemplateDefault &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -275,21 +290,25 @@ void test (HasTemplateDefault *p, const HasTemplateDefault &x,
T (bcopy, (&x, p, sizeof *p));
T (bcopy, (q, p, sizeof *p));
T (bcopy, (s, p, sizeof *p));
T (bcopy, (b, p, sizeof *p));
T (bcopy, (ia, p, sizeof *p)); // { dg-warning "bcopy" }
T (memcpy, (p, &x, sizeof *p));
T (memcpy, (p, q, sizeof *p));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, b, sizeof *p));
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, b, sizeof *p));
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p));
T (mempcpy, (p, q, sizeof *p));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, b, sizeof *p));
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -309,7 +328,8 @@ void test (HasTemplateDefault *p, const HasTemplateDefault &x,
struct HasCopy { int i; HasCopy (const HasCopy&); };
void test (HasCopy *p, const HasCopy &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -327,21 +347,25 @@ void test (HasCopy *p, const HasCopy &x,
T (bcopy, (&x, p, sizeof *p)); // { dg-warning "bcopy" }
T (bcopy, (q, p, sizeof *p)); // { dg-warning "bcopy" }
T (bcopy, (s, p, sizeof *p)); // { dg-warning "bcopy" }
T (bcopy, (b, p, sizeof *p)); // { dg-warning "bcopy" }
T (bcopy, (ia, p, sizeof *p)); // { dg-warning "bcopy" }
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -385,7 +409,8 @@ private:
};
void test (HasPrivateCopy *p, const HasPrivateCopy &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -403,16 +428,19 @@ void test (HasPrivateCopy *p, const HasPrivateCopy &x,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning ".void\\* memcpy(\[^\n\r\]*). writing to an object of non-trivially copyable type .struct HasPrivateCopy.; use copy-assignment instead" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -430,7 +458,8 @@ void test (HasPrivateCopy *p, const HasPrivateCopy &x,
struct HasDtor { int i; ~HasDtor (); };
void test (HasDtor *p, const HasDtor &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -449,16 +478,19 @@ void test (HasDtor *p, const HasDtor &x,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -481,7 +513,8 @@ struct HasDeletedDtor
};
void test (HasDeletedDtor *p, const HasDeletedDtor &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -494,16 +527,19 @@ void test (HasDeletedDtor *p, const HasDeletedDtor &x,
T (memcpy, (p, &x, sizeof *p));
T (memcpy, (p, q, sizeof *p));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, b, sizeof *p));
T (memcpy, (p, ia, sizeof *p));
T (memmove, (p, &x, sizeof *p));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, b, sizeof *p));
T (memmove, (p, ia, sizeof *p));
T (mempcpy, (p, &x, sizeof *p));
T (mempcpy, (p, q, sizeof *p));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, b, sizeof *p));
T (mempcpy, (p, ia, sizeof *p));
// Reallocating is diagnosed.
@ -527,7 +563,8 @@ private:
};
void test (HasPrivateDtor *p, const HasPrivateDtor &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -540,16 +577,19 @@ void test (HasPrivateDtor *p, const HasPrivateDtor &x,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "writing to an object of non-trivially copyable type .struct HasPrivateDtor.; use copy-assignment or copy-initialization instead" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is diagnosed.
@ -567,7 +607,8 @@ void test (HasPrivateDtor *p, const HasPrivateDtor &x,
struct HasCopyAssign { void operator= (HasCopyAssign&); };
void test (HasCopyAssign *p, const HasCopyAssign &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -584,16 +625,19 @@ void test (HasCopyAssign *p, const HasCopyAssign &x,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -620,7 +664,8 @@ struct HasMoveAssign
};
void test (HasMoveAssign *p, const HasMoveAssign &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -637,16 +682,19 @@ void test (HasMoveAssign *p, const HasMoveAssign &x,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -678,7 +726,8 @@ struct TrivialCopyHasMoveAssign
};
void test (TrivialCopyHasMoveAssign *p, const TrivialCopyHasMoveAssign &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -695,16 +744,19 @@ void test (TrivialCopyHasMoveAssign *p, const TrivialCopyHasMoveAssign &x,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -733,7 +785,8 @@ struct TrivialMoveNontrivialCopyAssign
void test (TrivialMoveNontrivialCopyAssign *p,
const TrivialMoveNontrivialCopyAssign &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -750,16 +803,19 @@ void test (TrivialMoveNontrivialCopyAssign *p,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -784,7 +840,8 @@ struct TrivialAssignRefOverload {
};
void test (TrivialAssignRefOverload *p, const TrivialAssignRefOverload &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -797,16 +854,19 @@ void test (TrivialAssignRefOverload *p, const TrivialAssignRefOverload &x,
T (memcpy, (p, &x, sizeof *p));
T (memcpy, (p, q, sizeof *p));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, b, sizeof *p));
T (memcpy, (p, ia, sizeof *p));
T (memmove, (p, &x, sizeof *p));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, b, sizeof *p));
T (memmove, (p, ia, sizeof *p));
T (mempcpy, (p, &x, sizeof *p));
T (mempcpy, (p, q, sizeof *p));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, b, sizeof *p));
T (mempcpy, (p, ia, sizeof *p));
T (q = realloc, (p, 1));
@ -831,7 +891,8 @@ struct TrivialAssignCstRefOverload {
void test (TrivialAssignCstRefOverload *p,
const TrivialAssignCstRefOverload &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -844,16 +905,19 @@ void test (TrivialAssignCstRefOverload *p,
T (memcpy, (p, &x, sizeof *p));
T (memcpy, (p, q, sizeof *p));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, b, sizeof *p));
T (memcpy, (p, ia, sizeof *p));
T (memmove, (p, &x, sizeof *p));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, b, sizeof *p));
T (memmove, (p, ia, sizeof *p));
T (mempcpy, (p, &x, sizeof *p));
T (mempcpy, (p, q, sizeof *p));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, b, sizeof *p));
T (mempcpy, (p, ia, sizeof *p));
T (q = realloc, (p, 1));
@ -875,7 +939,8 @@ struct TrivialRefHasVolRefAssign
void test (TrivialRefHasVolRefAssign *p,
const TrivialRefHasVolRefAssign &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -892,16 +957,19 @@ void test (TrivialRefHasVolRefAssign *p,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -922,7 +990,8 @@ struct HasVolRefAssign {
};
void test (HasVolRefAssign *p, const HasVolRefAssign &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -939,16 +1008,19 @@ void test (HasVolRefAssign *p, const HasVolRefAssign &x,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -967,7 +1039,8 @@ void test (HasVolRefAssign *p, const HasVolRefAssign &x,
struct HasVirtuals { int i; virtual void foo (); };
void test (HasVirtuals *p, const HasVirtuals &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -983,16 +1056,19 @@ void test (HasVirtuals *p, const HasVirtuals &x,
T (memcpy, (p, &x, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is the same as calling memcpy.
@ -1012,7 +1088,8 @@ void test (HasVirtuals *p, const HasVirtuals &x,
struct HasConstData { const char a[4]; };
void test (HasConstData *p, const HasConstData &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -1037,16 +1114,19 @@ void test (HasConstData *p, const HasConstData &x,
// { dg-warning "writing to an object of type .struct HasConstData. with no trivial copy-assignment" "c++ 98" { target { c++98_only } } .-1 }
T (memcpy, (p, q, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is not diagnosed except in C++ 98 due to a bug.
@ -1066,7 +1146,8 @@ void test (HasConstData *p, const HasConstData &x,
struct HasReference { int &ci; };
void test (HasReference *p, const HasReference &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -1098,17 +1179,21 @@ void test (HasReference *p, const HasReference &x,
T (memcpy, (p, q, n)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, n)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, n)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, n)); // { dg-warning "memcpy" }
T (memmove, (p, &x, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (mempcpy, (p, &x, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
// Reallocating is not diagnosed because a type with a reference
@ -1132,7 +1217,8 @@ void test (HasReference *p, const HasReference &x,
struct HasMemDataPtr { int HasMemDataPtr::*p; };
void test (HasMemDataPtr *p, const HasMemDataPtr &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -1155,17 +1241,21 @@ void test (HasMemDataPtr *p, const HasMemDataPtr &x,
T (memcpy, (p, q, n));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, s, n));
T (memcpy, (p, b, sizeof *p));
T (memcpy, (p, b, n));
T (memcpy, (p, ia, sizeof *p));
T (memcpy, (p, ia, n));
T (memmove, (p, &x, sizeof *p));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, b, sizeof *p));
T (memmove, (p, ia, sizeof *p));
T (mempcpy, (p, &x, sizeof *p));
T (mempcpy, (p, q, sizeof *p));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, b, sizeof *p));
T (mempcpy, (p, ia, sizeof *p));
// Reallocating is the same as calling memcpy.
@ -1185,7 +1275,8 @@ void test (HasMemDataPtr *p, const HasMemDataPtr &x,
struct HasSomePrivateData { char a[2]; private: char b[2]; };
void test (HasSomePrivateData *p, const HasSomePrivateData &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -1206,6 +1297,7 @@ void test (HasSomePrivateData *p, const HasSomePrivateData &x,
T (memcpy, (p, &x, n));
T (memcpy, (p, q, sizeof *p));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, b, sizeof *p));
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, n)); // { dg-warning "memcpy" }
@ -1214,6 +1306,7 @@ void test (HasSomePrivateData *p, const HasSomePrivateData &x,
T (memmove, (p, &x, n));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, b, sizeof *p));
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, n)); // { dg-warning "memmove" }
@ -1224,6 +1317,8 @@ void test (HasSomePrivateData *p, const HasSomePrivateData &x,
T (mempcpy, (p, q, n));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, s, n));
T (mempcpy, (p, b, sizeof *p));
T (mempcpy, (p, b, n));
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, n)); // { dg-warning "mempcpy" }
@ -1246,7 +1341,8 @@ void test (HasSomePrivateData *p, const HasSomePrivateData &x,
struct HasSomeProtectedData { char a[2]; protected: char b[2]; };
void test (HasSomeProtectedData *p, const HasSomeProtectedData &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -1267,6 +1363,7 @@ void test (HasSomeProtectedData *p, const HasSomeProtectedData &x,
T (memcpy, (p, &x, n));
T (memcpy, (p, q, sizeof *p));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, b, sizeof *p));
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, n)); // { dg-warning "memcpy" }
@ -1275,6 +1372,7 @@ void test (HasSomeProtectedData *p, const HasSomeProtectedData &x,
T (memmove, (p, &x, n));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, b, sizeof *p));
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, n)); // { dg-warning "memmove" }
@ -1285,6 +1383,8 @@ void test (HasSomeProtectedData *p, const HasSomeProtectedData &x,
T (mempcpy, (p, q, n));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, s, n));
T (mempcpy, (p, b, sizeof *p));
T (mempcpy, (p, b, n));
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, n)); // { dg-warning "mempcpy" }
@ -1307,7 +1407,8 @@ void test (HasSomeProtectedData *p, const HasSomeProtectedData &x,
struct HasAllPrivateData { private: char a[4]; };
void test (HasAllPrivateData *p, const HasAllPrivateData &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -1328,6 +1429,7 @@ void test (HasAllPrivateData *p, const HasAllPrivateData &x,
T (memcpy, (p, &x, n));
T (memcpy, (p, q, sizeof *p));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, b, sizeof *p));
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, n)); // { dg-warning "memcpy" }
@ -1336,6 +1438,7 @@ void test (HasAllPrivateData *p, const HasAllPrivateData &x,
T (memmove, (p, &x, n));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, b, sizeof *p));
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, n)); // { dg-warning "memmove" }
@ -1346,6 +1449,8 @@ void test (HasAllPrivateData *p, const HasAllPrivateData &x,
T (mempcpy, (p, q, n));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, s, n));
T (mempcpy, (p, b, sizeof *p));
T (mempcpy, (p, b, n));
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, n)); // { dg-warning "mempcpy" }
@ -1368,7 +1473,8 @@ void test (HasAllPrivateData *p, const HasAllPrivateData &x,
struct HasAllProtectedData { protected: char a[4]; };
void test (HasAllProtectedData *p, const HasAllProtectedData &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -1389,6 +1495,7 @@ void test (HasAllProtectedData *p, const HasAllProtectedData &x,
T (memcpy, (p, &x, n));
T (memcpy, (p, q, sizeof *p));
T (memcpy, (p, s, sizeof *p));
T (memcpy, (p, b, sizeof *p));
T (memcpy, (p, ia, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, ia, n)); // { dg-warning "memcpy" }
@ -1397,6 +1504,7 @@ void test (HasAllProtectedData *p, const HasAllProtectedData &x,
T (memmove, (p, &x, n));
T (memmove, (p, q, sizeof *p));
T (memmove, (p, s, sizeof *p));
T (memmove, (p, b, sizeof *p));
T (memmove, (p, ia, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, ia, n)); // { dg-warning "memmove" }
@ -1407,6 +1515,8 @@ void test (HasAllProtectedData *p, const HasAllProtectedData &x,
T (mempcpy, (p, q, n));
T (mempcpy, (p, s, sizeof *p));
T (mempcpy, (p, s, n));
T (mempcpy, (p, b, sizeof *p));
T (mempcpy, (p, b, n));
T (mempcpy, (p, ia, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, ia, n)); // { dg-warning "mempcpy" }
@ -1432,7 +1542,8 @@ private:
};
void test (HasDefaultPrivateAssign *p, const HasDefaultPrivateAssign &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -1462,16 +1573,22 @@ void test (HasDefaultPrivateAssign *p, const HasDefaultPrivateAssign &x,
T (memcpy, (p, q, n)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, n)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, n)); // { dg-warning "memcpy" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, n)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, n)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, n)); // { dg-warning "memmove" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, n)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, n)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, n)); // { dg-warning "mempcpy" }
// Same for partial copies are diagnosed.
T (memcpy, (p, &x, 1)); // { dg-warning "writing to an object of type .struct HasDefaultPrivateAssign. with (deleted|no trivial) copy-assignment" } */
@ -1503,7 +1620,8 @@ private:
};
void test (HasDefaultDeletedAssign *p, const HasDefaultDeletedAssign &x,
const void *q, const unsigned char *s, const int ia[])
const void *q, const unsigned char *s, const std::byte *b,
const int ia[])
{
const int i = *ia;
const size_t n = *ia;
@ -1533,16 +1651,22 @@ void test (HasDefaultDeletedAssign *p, const HasDefaultDeletedAssign &x,
T (memcpy, (p, q, n)); // { dg-warning "memcpy" }
T (memcpy, (p, s, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, s, n)); // { dg-warning "memcpy" }
T (memcpy, (p, b, sizeof *p)); // { dg-warning "memcpy" }
T (memcpy, (p, b, n)); // { dg-warning "memcpy" }
T (memmove, (p, q, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, q, n)); // { dg-warning "memmove" }
T (memmove, (p, s, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, s, n)); // { dg-warning "memmove" }
T (memmove, (p, b, sizeof *p)); // { dg-warning "memmove" }
T (memmove, (p, b, n)); // { dg-warning "memmove" }
T (mempcpy, (p, q, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, q, n)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, s, n)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, sizeof *p)); // { dg-warning "mempcpy" }
T (mempcpy, (p, b, n)); // { dg-warning "mempcpy" }
// Same for partial copies are diagnosed.
T (memcpy, (p, &x, 1)); // { dg-warning "writing to an object of type .struct HasDefaultDeletedAssign. with (deleted|no trivial) copy-assignment" } */