[sdcc-devel] [ sdcc-Bugs-564598 ] --nogcse generates incorrect code

[SourceForge.net <no...@so...>]

Bugs item #564598, was opened at 2002-06-04 16:24
Message generated for change (Comment added) made by epetrich
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100599&aid=564598&group_id=599

Category: None
>Group: fixed
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: --nogcse generates incorrect code

Initial Comment:
When the code below is compiled using --nogcse, the
variable count is not decremented in the while() statement.

sdcc 2.3.0
Linux Slackware 8.0
mcs51 target

//-----------------

unsigned char desc_sze;
unsigned char ptr;

void write_usb(unsigned char dta);

static void example(void)
{
    unsigned char count = ( desc_sze < 8 ) ? desc_sze : 8;

#if 1
    while ( count-- )           // doesn't work
    {
#else
    while ( count )             // works
    {
        count--;
#endif
        write_usb(ptr);
    }
}

//-----------------------



----------------------------------------------------------------------

>Comment By: Erik Petrich (epetrich)
Date: 2003-11-14 23:42

Message:
Logged In: YES 
user_id=635249

This was fixed by some change after 2003-10-14, most
probably the new live range code.


----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100599&aid=564598&group_id=599