Switch statement problems with Codewarrior 5.0

[FC]

Hello,

For switch statments with a lot of labels, the simulator does not select the correct label.  It produces a lot of exta instructions.  If a few labels are used, then it works fine.  Below is the sample code.  For example, if level = 4, the simulator selects 12.

Thansks

switch(DISPLevelCode)
  {
   
    case 1:     DISPGraphData = 0x03;
                   break;
    case 2:     DISPGraphData = 0x0F;
                   break;
    case 3:     DISPGraphData = 0x3F;
                   break;
    case 4:     DISPGraphData = 0xFF;
                   break;
    case 8:     DISPGraphData = 0x01;
                   break;
    case 9:     DISPGraphData = 0x07;
                   break;
    case 10:   DISPGraphData = 0x1F;
                   break;
    case 11:   DISPGraphData = 0x7F;
                   break;
    case 12:   DISPGraphData = 0xFF;
                  break;
    default:    DISPGraphData = 0x00;

[bigmac]

Hello,

I wonder if this is an issue of optimisation by the compiler, since the same action occurs for case 4 and case 12.  You could have equally written this code in the following form, and there would be no issue.

  case 4:

  case 12:

     DISPGraphData = 0xFF; break;

 Does the issue still occur if different values are assigned in each of the cases?

Regards,

Mac

[CompilerGuru]

It's probably the branch tail merging optimization which combines the identical case entries.

Try with "-onb=t -onbt".

Daniel

BTW: Please always list which cpu you are targeting.