[Bug c/20189] New: assignment error in inline function

[dirk at cle-mens dot de]

This error was similar to bug #20185,
but now it is a C-Programm and not C++


// Postet by [EMAIL PROTECTED]
// Compiler Error found:
//      gcc (GCC) 3.3.4 (pre 3.3.5 20040809)
//      under SuSE Linux kernel 2.6.8-24.10-default (i386)
//
// This Bug is a little bit different in relation to bug #20184
//
// If this littel programm is compiled with the option -O2
// the assignment in the inline function was wrong.
// If I remove the 'inline' of any of both functions the result is correct.
//
// Compiled with: gcc -Wall error.cpp
//              -> OK, last line of printout: 0000000000000001
//
// Compiled with: gcc -Wall -O2 error.cpp
//              -> ERROR, last line of printout: 080482c500000001
//
// Compiled with: gcc -Wall -O2 error.cpp
//  but without 'inline' for GenData() and/or GetData()
//              -> OK, last line of printout: 0000000000000001
//

#include <stdlib.h>
#include <stdio.h>

typedef unsigned int uint32;
typedef unsigned long long uint64;

struct data
{
    uint32 lo;
    uint32 hi;
};

inline struct data * GenData ( struct data * d, uint32 num )
{
    d->lo = num; d->hi = -(num<0);
    return d;
}

inline uint64 GetData ( const struct data * d )
{
    return *(uint64*)&d->lo;
}

int main ( int argc, char ** argv )
{ 
    printf("sizeof(uint32)=%d\n",sizeof(uint32));
    printf("sizeof(uint64)=%d\n",sizeof(uint64));
    printf("sizeof(data)=  %d\n",sizeof(struct data));

    uint32 tab[] = { 1,1,1,1,1 };
    uint32 *p = tab;

    struct data D;
    printf("D=%p lo=%p hi=%p\n",&D,&D.lo,&D.hi);

    uint64 u64 = GetData(GenData(&D,*p++));
    printf("%016llx\n",u64);

    return 0;
}

-- 
           Summary: assignment error in inline function
           Product: gcc
           Version: 3.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dirk at cle-mens dot de
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20189