[z80] --fomit-frame-pointer seems to break code

[sverx]

I've spent a good hour trying to understand what was going wrong in this piece of code.

  for (i=0;i<level->height;i++) {
    for (j=0;j<level->width;j++) {

      t=level->tMap[i*level->width+j];
      t1=level->t2Map[i*level->width+j];

      k=((t/6)*24)+(t%6)*2;
      k1=((t1/6)*24)+(t1%6)*2;

      rBuffer[j*2+i*4*level->width]=((t1==0) || (((short *)tilemap__bin)[k1]==0))?
             ((short *)tilemap__bin)[k]:TILE_PRIORITY|((short *)tilemap__bin)[k1];

      rBuffer[1+j*2+i*4*level->width]=((short *)tilemap__bin)[k+1];

    }
  }

The first write to rBuffer[] in the loop was never happening, I could only make that happen by removing the second write to rBuffer[]. Completely insane.

Then I tried removing --fomit-frame-pointer from the compiler switches. Now it works :|
I'm really not sure it's a bug, but I wanted you to know of this problem.

[Philipp Klaus Krause]

--fomit-frame-pointer is not as well-tested as the default. If you can separete out your code into a compileable function that reproduces the issue, please file a bug report.

Philipp

[sverx]

OK. Not easy BTW.
Thanks Philipp! :)