http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46454
Summary: Pointer to pointer function parameter handled
incorrectly
Product: gcc
Version: 4.4.5
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: tara...@gmail.com
Exact GCC version: gcc version 4.4.5 (Ubuntu/Linaro 4.4.4-14ubuntu5)
Program below when compiled with -O2 or higher produces output like:
--- 0x08724018 0x 0x08724008
With -O1 it produces expected output:
--- 0x09917018 0x09917008 0x09917008
#include
#include
#include
#include
typedef struct List_t
{
struct List_t *next;
} List_t;
typedef struct Symbol_t
{
struct Symbol_t *next;
} Symbol_t;
typedef struct First_t
{
Symbol_t *set;
} First_t;
static void list_add(void **list, void *element)
{
((List_t *)element)->next = NULL;
if (*list)
{
List_t *last = *list;
while (last->next)
last = last->next;
last->next = element;
}
else
*list = element;
}
int main(void)
{
First_t *item;
Symbol_t *res;
res = malloc(sizeof(Symbol_t));
res->next = NULL;
item = malloc(sizeof(struct First_t));
item->set = NULL;
list_add((void *)&item->set, res);
printf("--- 0x%08lx 0x%08lx 0x%08x\n", item, item->set, res);
return 0;
}
--
Bug seems to be fixed in 4.6.x branch, but present in 4.4.x and 4.5.x.
