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target/6431: v850-elf-gcc, va_arg() fails in expanding arguments
- From: markku dot pihlajamaa at luukku dot com
- To: gcc-gnats at gcc dot gnu dot org
- Date: 23 Apr 2002 18:13:49 -0000
- Subject: target/6431: v850-elf-gcc, va_arg() fails in expanding arguments
- Reply-to: markku dot pihlajamaa at luukku dot com
>Number: 6431
>Category: target
>Synopsis: v850-elf-gcc, va_arg() fails in expanding arguments
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: wrong-code
>Submitter-Id: net
>Arrival-Date: Tue Apr 23 11:16:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Markku Pihlajamaa
>Release: gcc version 2.96-xscale-010827
>Organization:
>Environment:
GNU C cross compiler, configured for the v850-elf target, the compiler is run on a PC and the operating system is
Red Hat Linux 7.1.
>Description:
The first optional argument is not expanded by
va_arg() at all, but is skipped, and the last
optional argument is expanded to a random number.
>How-To-Repeat:
#include <stdarg.h>
extern int out ( int );
void test( int parc, ... )
{
va_list list;
va_start( list, parc );
while( parc )
{
int i;
i = va_arg( list, int );
out( i );
parc --;
}
va_end( list );
}
int main( void )
{
test( 4, 1, 2, 3, 4 );
return 0;
}
>Fix:
*** gcc/config/v850/v850.c.original Sat Jan 8 10:15:57 2000
--- gcc/config/v850/v850.c Tue Apr 23 13:55:30 2002
***************
*** 3653,3659 ****
incr = build (MODIFY_EXPR, ptr_type_node, valist, incr);
TREE_SIDE_EFFECTS (incr) = 1;
- expand_expr (incr, const0_rtx, VOIDmode, EXPAND_NORMAL);
addr_rtx = expand_expr (addr, NULL, Pmode, EXPAND_NORMAL);
if (indirect)
--- 3653,3660 ----
incr = build (MODIFY_EXPR, ptr_type_node, valist, incr);
TREE_SIDE_EFFECTS (incr) = 1;
addr_rtx = expand_expr (addr, NULL, Pmode, EXPAND_NORMAL);
+
+ expand_expr (incr, const0_rtx, VOIDmode, EXPAND_NORMAL);
if (indirect)
>Release-Note:
>Audit-Trail:
>Unformatted: