Viewing file:  Wstringop-overflow-40.c (4.68 KB) -rw-r--r--
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/* PR c/50584 - No warning for passing small array to C99 static array
declarator
{ dg-do compile }
{ dg-options "-Wall" } */
typedef __INT16_TYPE__ int16_t;
void fa2 (int16_t[2]);
void fxa2 (int16_t[2]) __attribute__ ((nonnull));
void fas2 (int16_t[static 2]);
void fvla (unsigned n, int16_t[n]);
void test_array_1_dim (void)
{
int16_t a1[1];
int16_t a2[2];
int16_t i;
fa2 (0);
fa2 (a2);
fa2 (a1); // { dg-warning "'fa2' accessing 4 bytes in a region of size 2 " }
fa2 (&i); // { dg-warning "'fa2' accessing 4 bytes in a region of size 2 " }
fxa2 (0); // { dg-warning "\\\[-Wnonnull" }
fxa2 (a2);
fxa2 (a1); // { dg-warning "'fxa2' accessing 4 bytes in a region of size 2 " }
fxa2 (&i); // { dg-warning "'fxa2' accessing 4 bytes in a region of size 2 " }
fas2 (0); // { dg-warning "\\\[-Wnonnull" }
fas2 (a2);
fas2 (a1); // { dg-warning "'fas2' accessing 4 bytes in a region of size 2 " }
fas2 (&i); // { dg-warning "'fas2' accessing 4 bytes in a region of size 2 " }
fvla (1, 0); // { dg-warning "\\\[-Wnonnull" }
fvla (1, &i);
fvla (2, a2);
fvla (2, a1); // { dg-warning "'fvla' accessing 4 bytes in a region of size 2 " }
fvla (2, &i); // { dg-warning "'fvla' accessing 4 bytes in a region of size 2 " }
}
void fac2 (const int16_t[2]);
void fxac2 (const int16_t[2]) __attribute__ ((nonnull));
void facs2 (const int16_t[static 2]);
void fvlac (unsigned n, const int16_t[n]);
void test_const_array_1_dim (void)
{
int16_t a1[1];
int16_t a2[2];
int16_t i;
fac2 (0);
fac2 (a2);
fac2 (a1); // { dg-warning "'fac2' reading 4 bytes from a region of size 2 " }
fac2 (&i); // { dg-warning "'fac2' reading 4 bytes from a region of size 2 " }
fxac2 (0); // { dg-warning "\\\[-Wnonnull" }
fxac2 (a2);
fxac2 (a1); // { dg-warning "'fxac2' reading 4 bytes from a region of size 2 " }
fxac2 (&i); // { dg-warning "'fxac2' reading 4 bytes from a region of size 2 " }
facs2 (0); // { dg-warning "\\\[-Wnonnull" }
facs2 (a2);
facs2 (a1); // { dg-warning "'facs2' reading 4 bytes from a region of size 2 " }
facs2 (&i); // { dg-warning "'facs2' reading 4 bytes from a region of size 2 " }
fvlac (1, 0); // { dg-warning "\\\[-Wnonnull" }
fvlac (1, &i);
fvlac (2, a2);
fvlac (2, a1); // { dg-warning "'fvlac' reading 4 bytes from a region of size 2 " }
fvlac (2, &i); // { dg-warning "'fvlac' reading 4 bytes from a region of size 2 " }
}
void fca3x5 (int16_t[3][5]);
void fcas5x7 (int16_t[static 5][7]);
struct Snx5 { int16_t a3x5[3][5], a2x5[2][5], a1x5[1][5]; };
struct Snx7 { int16_t a5x7[5][7], a4x7[4][7], a1x7[1][7]; };
struct S0x7 { int x; int16_t a0x7[0][7]; };
void test_array_2_dim (struct Snx5 *px5, struct Snx7 *px7, struct S0x7 *p0x7)
{
int16_t a0x5[0][5], a1x5[1][5], a2x5[2][5], a3x5[3][5], a4x5[4][5];
fca3x5 (a3x5);
fca3x5 (a4x5);
fca3x5 (a2x5); // { dg-warning "'fca3x5' accessing 30 bytes in a region of size 20" }
fca3x5 (a1x5); // { dg-warning "'fca3x5' accessing 30 bytes in a region of size 10" }
fca3x5 (a0x5); // { dg-warning "'fca3x5' accessing 30 bytes in a region of size 0" }
fca3x5 (px5->a3x5);
fca3x5 (px5->a2x5); // { dg-warning "'fca3x5' accessing 30 bytes in a region of size 20" }
fca3x5 (px5->a1x5); // { dg-warning "'fca3x5' accessing 30 bytes in a region of size 10" "pr96346" { xfail *-*-* } }
{
int16_t (*pa2x5)[5] = &a2x5[0];
fca3x5 (pa2x5); // { dg-warning "'fca3x5' accessing 30 bytes in a region of size 10" }
++pa2x5;
fca3x5 (pa2x5); // { dg-warning "'fca3x5' accessing 30 bytes " }
}
int16_t a0x7[0][7], a1x7[1][7], a4x7[4][7], a5x7[5][7], a99x7[99][7];
fcas5x7 (a99x7);
fcas5x7 (a5x7);
fcas5x7 (a4x7); // { dg-warning "'fcas5x7' accessing 70 bytes in a region of size 56" }
fcas5x7 (a1x7); // { dg-warning "'fcas5x7' accessing 70 bytes in a region of size 14" }
fcas5x7 (a0x7); // { dg-warning "'fcas5x7' accessing 70 bytes in a region of size 0" }
fcas5x7 (px7->a5x7);
fcas5x7 (px7->a4x7); // { dg-warning "'fcas5x7' accessing 70 bytes in a region of size 56" }
fcas5x7 (px7->a1x7); // { dg-warning "'fcas5x7' accessing 70 bytes in a region of size 14" "pr96346" { xfail *-*-* } }
fcas5x7 (p0x7->a0x7); // { dg-warning "'fcas5x7' accessing 70 bytes in a region of size 0" "pr96346" { xfail *-*-* } }
}
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