[Bug c/11268] New: corrupted arg values/addresses when passed to a function

["umuta at us dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11268

           Summary: corrupted arg values/addresses when passed to a function
           Product: gcc
           Version: 2.96 (redhat)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: umuta@us.ibm.com
                CC: gcc-bugs@gcc.gnu.org

%gcc -v
Reading specs from /usr/lib/gcc-lib/ia64-redhat-linux/2.96/specs
gcc version 2.96 20000731 (Red Hat Linux 7.2 2.96-112.7.2)

consider the below c code:

a.c:

#include <stdio.h>
typedef struct problem
    {
    unsigned int data[2];
    short sign;
    } problem_t;

static int func1(int i1, int i2, int i3,
        int i4, int i5, int i6, int i7,
        problem_t p1, problem_t p2, problem_t p3,
        problem_t p4, problem_t *p5);

main()
{

problem_t   p1,p2,p3,p4,p5;
problem_t   tmp;
int rc;


tmp.data[0]=0;
tmp.data[1]=0;
tmp.sign=1;
p1 = p2 = tmp;


tmp.data[0]=1;
tmp.data[1]=0;
tmp.sign=-1;
p3 = tmp;

tmp.data[0]=0;
tmp.data[1]=0;
tmp.sign=0;
p4 = tmp;

printf("Values Before Calling func1()\n");
printf("i1 = %d\n",1);
printf("i2 = %d\n",2);
printf("i3 = %d\n",3);
printf("i4 = %d\n",4);
printf("i5 = %d\n",5);
printf("i6 = %d\n",6);
printf("i7 = %d\n",7);
printf("p1= {data = {%d , %d}, sign = %d}\n",p1.data[0],p1.data[1],p1.sign);
printf("p2= {data = {%d , %d}, sign = %d}\n",p2.data[0],p2.data[1],p2.sign);
printf("p3= {data = {%d , %d}, sign = %d}\n",p3.data[0],p3.data[1],p3.sign);
printf("p4= {data = {%d , %d}, sign = %d}\n",p4.data[0],p4.data[1],p4.sign);
printf("p5= %p\n",&p5);
printf("\n");
rc = func1(1,2,3,4,5,6,7,p1, p2, p3, p4, &p5);

}

static int
func1(  
        int            i1,
        int            i2,        
        int            i3,
        int            i4,
        int            i5,
        int            i6,
        int            i7,
        problem_t      p1,
        problem_t      p2,
        problem_t      p3,
        problem_t      p4,
        problem_t      *p5)
{
printf("Values Inside  func1()\n");
printf("i1 = %d\n",i1);
printf("i2 = %d\n",i2);
printf("i3 = %d\n",i3);
printf("i4 = %d\n",i4);
printf("i5 = %d\n",i5);
printf("i6 = %d\n",i6);
printf("i7 = %d\n",i7);
printf("p1= {data = {%d , %d}, sign = %d}\n",p1.data[0],p1.data[1],p1.sign);
printf("p2= {data = {%d , %d}, sign = %d}\n",p2.data[0],p2.data[1],p2.sign);
printf("p3= {data = {%d , %d}, sign = %d}\n",p3.data[0],p3.data[1],p3.sign);
printf("p4= {data = {%d , %d}, sign = %d}\n",p4.data[0],p4.data[1],p4.sign);
printf("p5= %p\n",p5);
return 0;
}

%gcc -o a a.c
%a
Values Before Calling func1()
i1 = 1
i2 = 2
i3 = 3
i4 = 4
i5 = 5
i6 = 6
i7 = 7
p1= {data = {0 , 0}, sign = 1}
p2= {data = {0 , 0}, sign = 1}
p3= {data = {1 , 0}, sign = -1}
p4= {data = {0 , 0}, sign = 0}
p5= 0x60000fffffffb800

Values Inside  func1()
i1 = 1
i2 = 2
i3 = 3
i4 = 4
i5 = 5
i6 = 6
i7 = 7
p1= {data = {0 , 0}, sign = 1}
p2= {data = {0 , 0}, sign = 0}
p3= {data = {1 , 0}, sign = 1}
p4= {data = {65535 , 0}, sign = 0}
p5= (nil)