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/* PR tree-optimization/82588 - missing -Warray-bounds on an excessively
large index
{ dg-do compile }
{ dg-require-effective-target alloca }
{ dg-options "-O2 -Warray-bounds -Wno-stringop-overread -ftrack-macro-expansion=0" } */
#include "../gcc.dg/range.h"
#define offsetof(T, m) __builtin_offsetof (T, m)
typedef struct AX { int n; char ax[]; } AX;
typedef struct A1 { int i; char a1[1]; } A1;
typedef struct B { int i; struct A1 a1x[]; } B;
void sink (int, ...);
#define R(min, max) signed_range (min, max)
#define T(expr) sink (0, expr)
struct __attribute__ ((packed)) S16 { unsigned i: 16; };
void farr_char (void)
{
extern char ac[];
T (ac[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .char *\\\[]." } */
T (ac[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (ac[0]);
T (ac[DIFF_MAX - 1]);
T (ac[DIFF_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ac[DIFF_MAX + (size_t)1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ac[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ac[R (DIFF_MAX - 1, DIFF_MAX)]);
T (ac[R (DIFF_MIN + 1, -1)]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (ac[R (DIFF_MIN + 1, 0)]);
T (ac[R (-1, 0)]);
T (ac[R (-1, 1)]);
}
void farr_s16 (void)
{
extern struct S16 ax[];
T (ax[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(struct )?S16 *\\\[]." } */
T (ax[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (ax[0]);
T (ax[DIFF_MAX / 2 - 1]);
T (ax[DIFF_MAX / 2]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ax[DIFF_MAX / 2 + (size_t)1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ax[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ax[R (DIFF_MIN, -1)]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (ax[R (DIFF_MAX / 2 - 1, DIFF_MAX)]);
T (ax[R (DIFF_MAX / 2, DIFF_MAX)]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
}
void farr_s16_7 (void)
{
extern struct S16 ax_7[][7];
T (ax_7[0][DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(struct )?S16 *\\\[7]." } */
T (ax_7[0][-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (ax_7[0][0]);
T (ax_7[0][7]); /* { dg-warning "array subscript 7 is above array bounds of .(struct )?S16 *\\\[7]." } */
T (ax_7[0][8]); /* { dg-warning "array subscript 8 is above array bounds of .(struct )?S16 *\\\[7]." } */
T (ax_7[0][DIFF_MAX / 2]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ax_7[0][SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ax_7[DIFF_MIN][0]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(struct )?S16 *\\\[]\\\[7]." } */
T (ax_7[-1][0]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (ax_7[DIFF_MAX / 2][0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ax_7[SIZE_MAX][0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
ptrdiff_t i = R (DIFF_MIN, -1);
T (ax_7[i][0]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (ax_7[R (DIFF_MIN, -1)][0]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (ax_7[R (DIFF_MIN, 0)][0]);
T (ax_7[R (-2, -1)][0]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (ax_7[R (-1, 0)][0]);
T (ax_7[R (-1, 1)][0]);
T (ax_7[R (-1, 7)][0]);
T (ax_7[R (-1, DIFF_MAX)][0]);
T (ax_7[R ( 1, DIFF_MAX)][0]);
T (ax_7[R (DIFF_MAX / 14 - 1, DIFF_MAX)][0]);
i = R (DIFF_MAX / 14, DIFF_MAX);
T (ax_7[i][0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (ax_7[0][R (DIFF_MIN, 0)]);
T (ax_7[0][R (-1, 0)]);
T (ax_7[0][R (-1, 1)]);
T (ax_7[0][R (-1, 7)]);
T (ax_7[0][R (-1, DIFF_MAX)]);
T (ax_7[0][R (-1, DIFF_MAX)]);
T (ax_7[0][R (1, DIFF_MAX)]);
T (ax_7[0][R (7, DIFF_MAX)]); /* { dg-warning "array subscript 7 is above array bounds" } */
}
void farr_x_5_7 (void)
{
extern struct S16 a[][5][7];
T (a[0][0][-3]); /* { dg-warning "array subscript -3 is below array bounds of .(struct )?S16 *\\\[7]." } */
T (a[0][-2][0]); /* { dg-warning "array subscript -2 is below array bounds of .(struct )?S16 *\\\[5]\\\[7]." } */
T (a[-1][0][0]); /* { dg-warning "array subscript -1 is below array bounds of .(struct )?S16 *\\\[]\\\[5]\\\[7]." } */
T (a[R (-4, -3)][0][0]); /* { dg-warning "array subscript -3 is below array bounds" } */
T (a[0][R (-3, -2)][0]); /* { dg-warning "array subscript -2 is below array bounds" } */
T (a[0][0][R (-2, -1)]); /* { dg-warning "array subscript -1 is below array bounds" } */
}
void fax (struct AX *p)
{
T (p->ax[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
T (p->ax[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (p->ax[0]);
T (p->ax[DIFF_MAX - sizeof *p - 1]);
T (p->ax[DIFF_MAX - sizeof *p]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->ax[DIFF_MAX - sizeof *p + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->ax[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->ax[R (DIFF_MIN, -1)]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (p->ax[R (-1, 1)]);
T (p->ax[R (0, DIFF_MAX - 1)]);
T (p->ax[R (DIFF_MAX - 1, DIFF_MAX)]);/* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
}
void fa1 (struct A1 *p)
{
T (p->a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
T (p->a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (p->a1[0]);
T (p->a1[9]);
T (p->a1[DIFF_MAX - offsetof (A1, a1) - 1]);
T (p->a1[DIFF_MAX - offsetof (A1, a1)]);/* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1[DIFF_MAX - offsetof (A1, a1) + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
}
void fb (struct B *p)
{
T (p->a1x->a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
T (p->a1x->a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (p->a1x->a1[0]);
T (p->a1x->a1[9]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x->a1[DIFF_MAX - sizeof *p]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x->a1[DIFF_MAX - sizeof *p + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x->a1[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[1].a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
T (p->a1x[1].a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (p->a1x[1].a1[0]);
T (p->a1x[1].a1[9]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[1].a1[DIFF_MAX - sizeof *p]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[1].a1[DIFF_MAX - sizeof *p + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[1].a1[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[2].a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
T (p->a1x[2].a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (p->a1x[2].a1[0]);
T (p->a1x[2].a1[9]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[2].a1[DIFF_MAX - sizeof *p]);/* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[2].a1[DIFF_MAX - sizeof *p + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[2].a1[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[3].a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
T (p->a1x[3].a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
T (p->a1x[3].a1[0]);
T (p->a1x[3].a1[9]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[9].a1[0]);
enum { MAX = (DIFF_MAX - sizeof *p) / sizeof *p->a1x };
T (p->a1x[DIFF_MIN].a1); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
T (p->a1x[-1].a1); /* { dg-warning "array subscript -1 is below array bounds" } */
T (p->a1x[MAX].a1);
T (p->a1x[MAX + 2].a1); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[DIFF_MAX].a1); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[SIZE_MAX].a1); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[DIFF_MIN].a1[0]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
T (p->a1x[-1].a1[0]) /* { dg-warning "array subscript -1 is below array bounds" } */;
T (p->a1x[MAX - 1].a1[0]);
T (p->a1x[MAX].a1[0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[MAX + 1].a1[0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[DIFF_MAX].a1[0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
T (p->a1x[SIZE_MAX].a1[0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
}
void f_cststring (int i)
{
T (""[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(const )?char *\\\[1]" "string" { xfail lp64 } } */
T (""[DIFF_MIN + 1]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(const )?char *\\\[1]" "string" } */
T (""[-1]); /* { dg-warning "array subscript -1 is below array bounds of .(const )?char *\\\[1]" "string" } */
T (""[0]);
T (""[1]); /* { dg-warning "array subscript 1 is above array bounds of .(const )?char *\\\[1]" "string" } */
T ("0"[2]); /* { dg-warning "array subscript 2 is above array bounds of .(const )?char *\\\[2]" "string" } */
T ("012"[2]);
T ("012"[3]);
T ("012"[4]); /* { dg-warning "array subscript 4 is above array bounds of .(const )?char *\\\[4]" "string" } */
T ("0123"[DIFF_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds of .(const )?char *\\\[5]" "string" } */
T ("0123"[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds of .(const )?char *\\\[5]" "string" } */
}
void fb_strlen (struct B *p)
{
#define strlen __builtin_strlen
T (strlen (&p->a1x[0].a1[2])); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" "strlen" } */
T (strlen (p->a1x[0].a1 + 2)); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" "strlen" { xfail *-*-* } } */
}
void f_vla (unsigned n)
{
char vla[n];
T (vla[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" "vla" } */
T (vla[-1]); /* { dg-warning "array subscript -1 is below array bounds" "vla" } */
T (vla[0]);
T (vla[1]);
T (vla[n - 1]);
/* It would be nice to diagnose this. */
T (vla[n]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" "bug 82608" { xfail *-*-*} } */
T (vla[DIFF_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" "vla" } */
}
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