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/* PR tree-optimization/84095 - false-positive -Wrestrict warnings for
strcpy within array
{ dg-do compile }
{ dg-options "-O2 -Wrestrict -Wno-stringop-overflow -ftrack-macro-expansion=0" } */
typedef __SIZE_TYPE__ size_t;
extern void* memcpy (void* restrict, const void* restrict, size_t);
extern char* strcpy (char* restrict, const char* restrict);
#define T(d, s) strcpy (d, s)
struct MemArrays {
char pad[8];
char a2[3][9];
char a3[3][4][9];
} a[2];
struct NestedMemArrays {
struct MemArrays ma;
struct MemArrays ma1[2];
} nma[2];
/* Use a variable as the source of a copy to verify that VAR_DECL
is handled correctly when it's the source of GIMPLE assignment. */
const char *str = "1234567";
void test_obj_2_dim_const (void)
{
const char *s = strcpy (a[0].a2[0], "1234567");
T (a[0].a2[1], s);
T (a[0].a2[2], s);
/* Ideally, the offsets in the warning below would be relative to
the beginning of the accessed array member. Unfortunately, when
the offset is represented as
MEM_REF (char[9], A, offsetof (struct MemArrays, A[0].A2[0]) + 1)
as it is in this instance it's difficult to determine the member
that is being accessed and tease out from the MEM_REF the offset
as it appears in the source. As a result, the warning mentions
the offset from the beginning of A instead. This is suboptimal
and should be fixed, either by printing the correct offsets or
by mentioning the base object that the offset is relative to. */
T (a[0].a2[0] + 1, s); /* { dg-warning "accessing 8 bytes at offsets \(1|9\) and \(0|8\) overlaps 7 bytes at offset \(1|9\)." } */
T (a[0].a2[1] + 2, s);
T (a[0].a2[2] + 3, s);
T (a[1].a2[0], s);
T (a[1].a2[1], s);
T (a[1].a2[2], s);
T (a[1].a2[0] + 1, s);
T (a[1].a2[1] + 2, s);
T (a[1].a2[2] + 3, s);
}
void test_obj_nested_2_dim_const (void)
{
const char *s = strcpy (nma[0].ma.a2[0], str);
T (nma[0].ma.a2[1], s);
T (nma[0].ma.a2[2], s);
T (nma[0].ma.a2[0] + 1, s); /* { dg-warning "accessing 8 bytes at offsets 1 and 0 overlaps 7 bytes at offset 1" "bug " { xfail *-*-* } } */
T (nma[0].ma.a2[1] + 2, s);
T (nma[0].ma.a2[2] + 3, s);
T (nma[1].ma.a2[1], s);
T (nma[1].ma.a2[2], s);
T (nma[1].ma.a2[0] + 1, s);
T (nma[1].ma.a2[1] + 2, s);
T (nma[1].ma.a2[2] + 3, s);
T (nma[0].ma1[0].a2[1], s);
T (nma[0].ma1[0].a2[2], s);
T (nma[0].ma1[0].a2[0] + 1, s);
T (nma[0].ma1[0].a2[1] + 2, s);
T (nma[0].ma1[0].a2[2] + 3, s);
T (nma[1].ma1[0].a2[1], s);
T (nma[1].ma1[0].a2[2], s);
T (nma[1].ma1[0].a2[0] + 1, s);
T (nma[1].ma1[0].a2[1] + 2, s);
T (nma[1].ma1[0].a2[2] + 3, s);
}
void test_obj_2_dim_var (int i, int j)
{
const char *s = memcpy (a[0].a2[0], "1234567", 8);
T (a[i].a2[0], s); /* { dg-bogus "\\\[-Wrestrict]" } */
T (a[i].a2[1], s);
T (a[i].a2[2], s);
T (a[i].a2[0] + 1, s);
T (a[i].a2[1] + 1, s);
T (a[i].a2[2] + 1, s);
T (a[0].a2[i], s); /* { dg-bogus "\\\[-Wrestrict]" } */
T (a[1].a2[i], s);
T (a[i].a2[0] + j, s);
T (a[i].a2[1] + j, s);
T (a[i].a2[2] + j, s);
T (a[0].a2[i] + 1, s);
T (a[1].a2[i] + 1, s);
T (a[0].a2[i] + j, s);
T (a[1].a2[i] + j, s);
if (i < 0 || 1 < i)
i = 1;
T (a[i].a2[0], s);
T (a[i].a2[1], s);
T (a[i].a2[2], s);
T (a[i].a2[0] + 1, s);
T (a[i].a2[1] + 1, s);
T (a[i].a2[2] + 1, s);
T (a[0].a2[i], s);
T (a[1].a2[i], s);
T (a[i].a2[0] + j, s);
T (a[i].a2[1] + j, s);
T (a[i].a2[2] + j, s);
T (a[0].a2[i] + 1, s);
T (a[1].a2[i] + 1, s);
T (a[0].a2[i] + j, s);
T (a[1].a2[i] + j, s);
}
void test_obj_nested_2_dim_var (int i, int j)
{
const char *s = strcpy (nma[0].ma.a2[0], "1234567");
T (nma[i].ma.a2[0], s); /* { dg-bogus "\\\[-Wrestrict]" } */
T (nma[i].ma.a2[1], s);
T (nma[i].ma.a2[2], s);
T (nma[i].ma.a2[0] + 1, s);
T (nma[i].ma.a2[1] + 1, s);
T (nma[i].ma.a2[2] + 1, s);
T (nma[0].ma.a2[i], s); /* { dg-bogus "\\\[-Wrestrict]" } */
T (nma[1].ma.a2[i], s);
T (nma[i].ma.a2[0] + j, s);
T (nma[i].ma.a2[1] + j, s);
T (nma[i].ma.a2[2] + j, s);
T (nma[0].ma.a2[i] + 1, s);
T (nma[1].ma.a2[i] + 1, s);
T (nma[0].ma.a2[i] + j, s);
T (nma[1].ma.a2[i] + j, s);
}
void test_ref_2_dim_const (struct MemArrays *p)
{
strcpy (p[0].a2[0], "1234567");
const char *s = p[0].a2[0];
T (p[0].a2[1], s);
T (p[0].a2[2], s);
T (p[1].a2[0], s);
T (p[1].a2[1], s);
T (p[1].a2[2], s);
}
void test_ref_2_dim_var (struct MemArrays *p, int i, int j)
{
strcpy (p[0].a2[0], "1234567");
const char *s = p[0].a2[0];
T (p[i].a2[0], s); /* { dg-bogus "\\\[-Wrestrict]" } */
T (p[i].a2[1], s);
T (p[i].a2[2], s);
T (p[0].a2[i], s);
T (p[1].a2[i], s);
T (p[i].a2[0] + j, s);
T (p[i].a2[1] + j, s);
T (p[i].a2[2] + j, s);
T (p[0].a2[i] + j, s);
T (p[1].a2[i] + j, s);
}
void test_obj_3_dim_var (int i, int j)
{
strcpy (a[0].a3[0][0], "1234567");
const char *s = a[0].a3[0][0];
T (a[0].a3[0][i], s);
T (a[0].a3[1][i], s);
T (a[0].a3[2][i], s);
T (a[1].a3[0][i], s);
T (a[1].a3[1][i], s);
T (a[1].a3[2][i], s);
T (a[0].a3[i][0], s); /* { dg-bogus "\\\[-Wrestrict\]" } */
T (a[0].a3[i][1], s);
T (a[0].a3[i][2], s);
T (a[1].a3[i][0], s);
T (a[1].a3[i][1], s);
T (a[1].a3[i][2], s);
T (a[i].a3[0][0], s); /* { dg-bogus "\\\[-Wrestrict\]" } */
T (a[i].a3[0][1], s);
T (a[i].a3[0][2], s);
T (a[i].a3[1][0], s);
T (a[i].a3[1][1], s);
T (a[i].a3[1][2], s);
T (a[i].a3[2][0], s);
T (a[i].a3[2][1], s);
T (a[i].a3[2][2], s);
T (a[0].a3[0][i] + 1, s);
T (a[0].a3[1][i] + 1, s);
T (a[0].a3[2][i] + 1, s);
T (a[1].a3[0][i] + 1, s);
T (a[1].a3[1][i] + 1, s);
T (a[1].a3[2][i] + 1, s);
T (a[0].a3[0][i] + j, s);
T (a[0].a3[1][i] + j, s);
T (a[0].a3[2][i] + j, s);
T (a[1].a3[0][i] + j, s);
T (a[1].a3[1][i] + j, s);
T (a[1].a3[2][i] + j, s);
T (a[0].a3[i][0] + j, s);
T (a[0].a3[i][1] + j, s);
T (a[0].a3[i][2] + j, s);
T (a[1].a3[i][0] + j, s);
T (a[1].a3[i][1] + j, s);
T (a[1].a3[i][2] + j, s);
T (a[i].a3[0][0] + j, s);
T (a[i].a3[0][1] + j, s);
T (a[i].a3[0][2] + j, s);
T (a[i].a3[1][0] + j, s);
T (a[i].a3[1][1] + j, s);
T (a[i].a3[1][2] + j, s);
T (a[i].a3[2][0] + j, s);
T (a[i].a3[2][1] + j, s);
T (a[i].a3[2][2] + j, s);
}
void test_obj_3_dim_const (struct MemArrays *p)
{
strcpy (p[0].a3[0][0], "1234567");
const char *s = p[0].a3[0][0];
T (p[0].a3[0][1], s);
T (p[0].a3[0][2], s);
T (p[0].a3[0][3], s);
T (p[0].a3[0][1] + 1, s);
T (p[0].a3[0][2] + 1, s);
T (p[0].a3[0][3] + 1, s);
T (p[0].a3[1][0], s);
T (p[0].a3[1][1], s);
T (p[0].a3[1][2], s);
T (p[0].a3[1][3], s);
T (p[0].a3[1][0] + 1, s);
T (p[0].a3[1][1] + 1, s);
T (p[0].a3[1][2] + 1, s);
T (p[0].a3[1][3] + 1, s);
T (p[0].a3[2][0], s);
T (p[0].a3[2][1], s);
T (p[0].a3[2][2], s);
T (p[0].a3[2][3], s);
T (p[1].a3[0][0], s);
T (p[1].a3[0][1], s);
T (p[1].a3[0][2], s);
T (p[1].a3[0][3], s);
T (p[1].a3[1][0], s);
T (p[1].a3[1][1], s);
T (p[1].a3[1][2], s);
T (p[1].a3[1][3], s);
T (p[1].a3[2][0], s);
T (p[1].a3[2][1], s);
T (p[1].a3[2][2], s);
T (p[1].a3[2][3], s);
}
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