Debugger bug or optimisation bug

[lostcentaur]

The following code in debugger mode - by stepping with F10 will jump from the first if statement right to the last statement while pC not being NULL.
(This code is part of a project ported from VS2005)

int CmmnHandleSelected(tsConsoleCtrl *pC,tsList *pL,HWND hWnd)
{
tsWndCtrl rWnd;
HWND hWndList;

if (pC == NULL)
   {
    pC = (tsConsoleCtrl *)GetWindowLongPtr(ghWndTBCombo,GWLP_USERDATA);
    if (pC != NULL)
     {
      rWnd = pC->rWnd;
     }
   }
else
   {
    rWnd = pC->rWnd;
   }

// Als beide lijsten leeg zijn, FALSE teruggeven
if ((pL == NULL) AND (rWnd.prRows == NULL)) return(0);

[CommonTater]

if PC is not NULL  the next step in your program would be the final if statement... since debug is just tracing your code's execution, it makes sense it would jump past it... 

[lostcentaur]

No No, it does nothing with the first if then block !!  not even the else tag, what I would expect him to do.  It jumps to the next if, as if the first if-then-else block was completely ignored.
Now I did some further testing and it is clearly an optimisation bug for when I turned optimisation to 'none', the code runs fine - as should.  The else part is used and a values was given for the variable.

[CommonTater]

No No, it does nothing with the first if then block !!  not even the else tag, what I would expect him to do.  It jumps to the next if, as if the first if-then-else block was completely ignored.
Now I did some further testing and it is clearly an optimisation bug for when I turned optimisation to 'none', the code runs fine - as should.  The else part is used and a values was given for the variable.

Another optimizer bug... ouch.  That's three now.

Sorry if I misunderstood.