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/* PR middle-end/94195 - missing warning reading a smaller object via
an lvalue of a larger type
{ dg-do compile }
{ dg-options "-O2 -Wall" }
{ dg-require-effective-target alloca } */
typedef __INT16_TYPE__ int16_t;
typedef __SIZE_TYPE__ size_t;
void* alloca (size_t);
void sink (void*);
void byte_store_to_decl (void)
{
struct S6 { char a[6]; } s; // { dg-message "at offset 6 into object 's' of size 6" "note" }
char *p = (char*)&s;
p[0] = 0; p[1] = 1; p[2] = 2; p[3] = 3; p[4] = 4; p[5] = 5;
p[6] = 6; // { dg-warning "array subscript 6 is outside array bounds of 'struct S6\\\[1]" }
sink (&s);
}
void word_store_to_decl (void)
{
struct S6 { char a[6]; } s; // { dg-message "at offset 5 into object 's' of size 6" "note" }
char *p = (char*)&s;
int16_t *q = (int16_t*)(p + 1);
q[0] = 0; q[1] = 1;
q[2] = 2; // { dg-warning "array subscript 'int16_t {aka short int}\\\[2]' is partly outside array bounds of 'struct S6\\\[1]'" }
sink (&s);
}
void word_store_to_alloc (void)
{
struct S6 { char a[6]; } *p;
p = alloca (sizeof *p); // { dg-message "at offset 5 into object of size 6 allocated by 'alloca'" "note" }
int16_t *q = (int16_t*)((char*)p + 1);
q[0] = 0; q[1] = 1;
q[2] = 2; // { dg-warning "array subscript 'int16_t {aka short int}\\\[2]' is partly outside array bounds of 'unsigned char\\\[6]'" }
sink (p);
}
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