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* [Bug c/17719] New: regparm __attribute__ not set in function casts
@ 2004-09-28 23:18 jfran at clip dot dia dot fi dot upm dot es
  2004-09-28 23:34 ` [Bug c/17719] " pinskia at gcc dot gnu dot org
  0 siblings, 1 reply; 2+ messages in thread
From: jfran at clip dot dia dot fi dot upm dot es @ 2004-09-28 23:18 UTC (permalink / raw)
  To: gcc-bugs

Direct cast from void pointer to function pointer forgets about regparm
attributes (resulting a segfault). The bug does not appear if a temporal union
is used to do the cast (like in FUNCCAST0).
--

#include <stdio.h>

#define ATTR __attribute__((regparm(1)))
//#define ATTR

ATTR void f(char *s);
typedef ATTR void (*f_t)(char *s);

#define FUNCCAST0(T, X) ((union { T t; } *)&(X))->t
#define FUNCCAST1(T, X) ((T)(X))

int main() {
  void *fp;
  fp = f;
  FUNCCAST0(f_t, fp)("ok0");
  FUNCCAST1(f_t, fp)("ok1");
  return 0;
}

ATTR void f(char *s) {
  printf("%s\n", s);
}

-- 
           Summary: regparm __attribute__ not set in function casts
           Product: gcc
           Version: 3.3.3
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jfran at clip dot dia dot fi dot upm dot es
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17719


^ permalink raw reply	[flat|nested] 2+ messages in thread
* [Bug c/17719] regparm __attribute__ not set in function casts
  2004-09-28 23:18 [Bug c/17719] New: regparm __attribute__ not set in function casts jfran at clip dot dia dot fi dot upm dot es
@ 2004-09-28 23:34 ` pinskia at gcc dot gnu dot org
  0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-09-28 23:34 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From pinskia at gcc dot gnu dot org  2004-09-28 23:34 -------
Fixed in 3.4.0.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|critical                    |normal
             Status|UNCONFIRMED                 |RESOLVED
           Keywords|                            |wrong-code
         Resolution|                            |FIXED
   Target Milestone|---                         |3.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17719


^ permalink raw reply	[flat|nested] 2+ messages in thread
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2004-09-28 23:18 [Bug c/17719] New: regparm __attribute__ not set in function casts jfran at clip dot dia dot fi dot upm dot es
2004-09-28 23:34 ` [Bug c/17719] " pinskia at gcc dot gnu dot org

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