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/* PR tree-optimization/84047 - missing -Warray-bounds on an out-of-bounds
index into an array
{ dg-do compile }
{ dg-options "-O2 -Warray-bounds=2 -ftrack-macro-expansion=0" }
{ dg-skip-if "too many arguments in function call" { bpf-*-* } } */
#include "range.h"
#define MAX DIFF_MAX
#define MIN DIFF_MIN
void sink (int, ...);
#define T(...) sink (0, __VA_ARGS__)
void test_global_char_array (void)
{
extern char gcar1[1];
char *p = gcar1;
T (p[MIN]); /* { dg-warning "subscript -\[0-9\]+ is outside array bounds of .char\\\[1]." } */
T (p[-1]); /* { dg-warning "subscript -1 is outside array bounds of .char\\\[1]." } */
T (p[0]);
T (p[1]); /* { dg-warning "subscript 1 is outside array bounds of .char\\\[1]." } */
T (p[MAX]); /* { dg-warning "subscript \[0-9\]+ is outside array bounds of .char\\\[1]." } */
T (&p[MIN]); /* { dg-warning "subscript -\[0-9\]+ is \(below|outside\) array bounds of .char\\\[1]." } */
T (&p[-1]); /* { dg-warning "subscript -1 is \(below|outside\) array bounds of .char\\\[1]." } */
T (&p[0]);
T (&p[1]);
T (&p[2]); /* { dg-warning "subscript 2 is \(above|outside\) array bounds of .char\\\[1]." } */
T (&p[MAX]); /* { dg-warning "subscript \[0-9\]+ is \(above|outside\) array bounds of .char\\\[1]." } */
extern char gcar3[3];
char *q = gcar3;
T (q[MIN]); /* { dg-warning "subscript -\[0-9\]+ is outside array bounds of .char\\\[3]." } */
T (q[-1]); /* { dg-warning "subscript -1 is outside array bounds of .char\\\[3]." } */
T (q[0]);
T (q[1]);
T (q[2]);
T (q[3]); /* { dg-warning "subscript 3 is outside array bounds of .char\\\[3]." } */
T (q[MAX]); /* { dg-warning "subscript \[0-9\]+ is outside array bounds of .char\\\[3]." } */
T (&q[MIN]); /* { dg-warning "subscript -\[0-9\]+ is \(below|outside\) array bounds of .char\\\[3]." } */
T (&q[-1]); /* { dg-warning "subscript -1 is \(below|outside\) array bounds of .char\\\[3]." } */
T (&q[0]);
T (&q[1]);
T (&q[2]);
T (&q[3]);
T (&q[4]); /* { dg-warning "subscript 4 is \(above|outside\) array bounds of .char\\\[3]." } */
T (&q[MAX]); /* { dg-warning "subscript \[0-9\]+ is \(above|outside\) array bounds of .char\\\[3]." } */
}
void test_global_int_array (void)
{
/* Use smaller values to prevent false negatives due to undetected
integer overflow/wrapping. */
ptrdiff_t min = MIN / sizeof (int);
ptrdiff_t max = MAX / sizeof (int);
extern int giar1[1];
extern int giar3[3];
int *p = giar1;
T (p[min]); /* { dg-warning "subscript -\[0-9\]+ is outside array bounds of .int\\\[1]." } */
T (p[-1]); /* { dg-warning "subscript -1 is outside array bounds of .int\\\[1]." } */
T (p[0]);
T (p[1]); /* { dg-warning "subscript 1 is outside array bounds of .int\\\[1]." } */
T (p[max]); /* { dg-warning "subscript \[0-9\]+ is outside array bounds of .int\\\[1]." } */
T (&p[min]); /* { dg-warning "subscript -\[0-9\]+ is \(below|outside\) array bounds of .int\\\[1]." } */
T (&p[-1]); /* { dg-warning "subscript -1 is \(below|outside\) array bounds of .int\\\[1]." } */
T (&p[0]);
T (&p[1]);
T (&p[2]); /* { dg-warning "subscript 2 is \(above|outside\) array bounds of .int\\\[1]." } */
T (&p[max]); /* { dg-warning "subscript \[0-9\]+ is \(above|outside\) array bounds of .int\\\[1]." } */
int *q = giar3;
T (q[min]); /* { dg-warning "subscript -\[0-9\]+ is outside array bounds of .int\\\[3]." } */
T (q[-1]); /* { dg-warning "subscript -1 is outside array bounds of .int\\\[3]." } */
T (q[0]);
T (q[1]);
T (q[2]);
T (q[3]); /* { dg-warning "subscript 3 is outside array bounds of .int\\\[3]." } */
T (q[max]); /* { dg-warning "subscript \[0-9\]+ is outside array bounds of .int\\\[3]." } */
T (&q[min]); /* { dg-warning "subscript -\[0-9\]+ is \(below|outside\) array bounds of .int\\\[3]." } */
T (&q[-1]); /* { dg-warning "subscript -1 is \(below|outside\) array bounds of .int\\\[3]." } */
T (&q[0]);
T (&q[1]);
T (&q[2]);
T (&q[3]);
T (&q[4]); /* { dg-warning "subscript 4 is \(above|outside\) array bounds of .int\\\[3]." } */
T (&q[max]); /* { dg-warning "subscript \[0-9\]+ is \(above|outside\) array bounds of .int\\\[3]." } */
}
void test_global_short_2dim_array (void)
{
extern short giar3_5[3][5];
short *p = giar3_5[0];
/* The access below isn't diagnosed because the reference is transformed
into MEM_REF (short*, &giar3_5, 0), i.e., *giar3_5[0][0]. */
T (p[MIN]); /* { dg-warning "subscript -\[0-9\]+ is outside array bounds of .short int\\\[3]" "bug" { xfail *-*-*} } */
T (p[-1]); /* { dg-warning "subscript -1 is outside array bounds of .short int\\\[3]" } */
T (p[0]);
T (p[1]);
T (p[2]);
T (p[15]); /* { dg-warning "subscript 15 is outside array bounds of .short int\\\[3]" } */
T (p[MAX]); /* { dg-warning "subscript -?\[0-9\]+ is outside array bounds of .short int\\\[3]" } */
T (&p[MIN]); /* { dg-warning "subscript -\[0-9\]+ is \(below|outside\) array bounds of .short int\\\[3]" "bug" { xfail *-*-* } } */
T (&p[-1]); /* { dg-warning "subscript -1 is \(below|outside\) array bounds of .short int\\\[3]" } */
T (&p[0]);
T (&p[1]);
T (&p[2]);
T (&p[3]);
T (&p[16]); /* { dg-warning "subscript 16 is \(above|outside\) array bounds of .short int\\\[3]" } */
T (&p[MAX]); /* { dg-warning "subscript -?\[0-9\]+ is \(above|outside\) array bounds of .short int\\\[3]" } */
}
void test_local_char_array (void)
{
char ar1[1] = { 1 };
char *p = ar1;
T (p[MIN]); /* { dg-warning "subscript -\[0-9\]+ is outside array bounds of .char\\\[1]." } */
T (p[-1]); /* { dg-warning "subscript -1 is outside array bounds of .char\\\[1]." } */
T (p[0]);
T (p[1]); /* { dg-warning "subscript 1 is outside array bounds of .char\\\[1]." } */
T (p[MAX]); /* { dg-warning "subscript \[0-9\]+ is outside array bounds of .char\\\[1]." } */
T (&p[MIN]); /* { dg-warning "subscript -\[0-9\]+ is \(below|outside\) array bounds of .char\\\[1]." } */
T (&p[-1]); /* { dg-warning "subscript -1 is \(below|outside\) array bounds of .char\\\[1]." } */
T (&p[0]);
T (&p[1]);
T (&p[2]); /* { dg-warning "subscript 2 is \(above|outside\) array bounds of .char\\\[1]." } */
T (&p[MAX]); /* { dg-warning "subscript \[0-9\]+ is \(above|outside\) array bounds of .char\\\[1]." } */
char ar3[3] = { 1, 2, 3 };
p = ar3;
T (p[MIN]); /* { dg-warning "subscript -\[0-9\]+ is outside array bounds of .char\\\[3]." } */
T (p[-1]); /* { dg-warning "subscript -1 is outside array bounds of .char\\\[3]." } */
T (p[0]);
T (p[1]);
T (p[2]);
T (p[3]); /* { dg-warning "subscript 3 is outside array bounds of .char\\\[3]." } */
T (p[MAX]); /* { dg-warning "subscript \[0-9\]+ is outside array bounds of .char\\\[3]." } */
T (&p[MIN]); /* { dg-warning "subscript -\[0-9\]+ is \(below|outside\) array bounds of .char\\\[3]." } */
T (&p[-1]); /* { dg-warning "subscript -1 is \(below|outside\) array bounds of .char\\\[3]." } */
T (&p[0]);
T (&p[1]);
T (&p[2]);
T (&p[3]);
T (&p[4]); /* { dg-warning "subscript 4 is \(above|outside\) array bounds of .char\\\[3]." } */
T (&p[MAX]); /* { dg-warning "subscript \[0-9\]+ is \(above|outside\) array bounds of .char\\\[3]." } */
}
struct S
{
int a[2], b[3];
} s [4];
void test_struct_array_cst (void)
{
T (s[0].a[0] + s[0].a[1] + s[0].b[0] + s[0].b[1] + s[0].b[2] + s[0].b[2]
+ s[1].a[0] + s[1].a[1] + s[1].b[0] + s[1].b[1] + s[1].b[2] + s[1].b[2]
+ s[2].a[0] + s[2].a[1] + s[2].b[0] + s[2].b[1] + s[2].b[2] + s[2].b[2]
+ s[3].a[0] + s[3].a[1] + s[3].b[0] + s[3].b[1] + s[3].b[2] + s[3].b[2]);
T (&s[0].a[2],
&s[0].b[3],
&s[1].a[2],
&s[1].b[3],
&s[2].a[2],
&s[2].b[3],
&s[3].a[2],
&s[3].b[3]);
T (s[0].a[2]); /* { dg-warning "subscript 2 is above array bounds of .int\\\[2\\\]." } */
T (s[0].b[3]); /* { dg-warning "subscript 3 is above array bounds of .int\\\[3\\\]." } */
T (s[1].a[2]); /* { dg-warning "subscript 2 is above array bounds of .int\\\[2\\\]." } */
T (s[1].b[3]); /* { dg-warning "subscript 3 is above array bounds of .int\\\[3\\\]." } */
T (s[2].a[2]); /* { dg-warning "subscript 2 is above array bounds of .int\\\[2\\\]." } */
T (s[2].b[3]); /* { dg-warning "subscript 3 is above array bounds of .int\\\[3\\\]." } */
T (s[3].a[2]); /* { dg-warning "subscript 2 is above array bounds of .int\\\[2\\\]." } */
T (s[3].b[3]); /* { dg-warning "subscript 3 is above array bounds of .int\\\[3\\\]." } */
T (s[4].a[0]); /* { dg-warning "subscript 4 is above array bounds of .struct S\\\[4\\\]." } */
T (s[4].a[2]); /* { dg-warning "subscript 4 is above array bounds of .struct S\\\[4\\\]." } */
/* { dg-warning "subscript 2 is above array bounds of .int\\\[2\\\]." "" { target *-*-* } .-1 } */
}
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