As many people pointed out, the debugger can display interesting
results with optimizations turned on, and that could very well be the
source of the problem.
However, I _have_ seen a similar problem in the past, where the
compiler was indeed generating incorrect code (skipping the entire
code block) for a simple if/else statement with the optimization
level set to 1. This was with an older version of CodeWarrior, so I
don't know if it still happens with v2.3.2 of the C/C++ compiler.
What version are you using?
I'd use CodeWarrior to generate a 68K disassembly of the routine with
opt=1, and see if the 68K instructions are actually getting
generated. If you want, email the dump to me.
-- Ken
At 12:00am -0700 00-08-17, Palm Developer Forum digest wrote:
>Subject: Attn: MetroWorks CW, Annoying optimization issue
>From: "Charles Rezsonya" <[EMAIL PROTECTED]>
>Date: Mon, 14 Aug 2000 14:48:50 -0400
>X-Message-Number: 40
>
>i have a small chunk of code which i was wondering why it wasn't working. i
>have the projects debugging level 1 up from "no optimizations". when i
>place some frmCustomAlerts, a calculation is made, and some numbers are
>assigned to ulongs. but when i remove the customAlerts, it totally skips
>the calculation which is importent. so i tried putting the optimizations to
>none and see what it does and now it does it. can anyone bring up anything
>that might cause this bug? i say bug, because an optimizer isn't supposed
>to skip lines of code.
>
>
>Word CheckXORAdjustData(ULong serverDate, UShort offSet) {
> ULong curDate;
> ULong offSetSec;
> ULong dateDiff;
>
> curDate=TimGetSeconds(); // get units time in seconds
> if(curDate==serverDate) { // if seconds match then exit
> return 0;
> }
> offSetSec=offSet*60; // get offset in seconds
>
> if(curDate>serverDate) {
>// FrmCustomAlert(TestAlert, "TEST", " ", " "); // <---- these two
>lines if removed make the entire if statement skipped
> dateDiff=curDate-serverDate;
> } else {
>// FrmCustomAlert(TestAlert, "TEST2", " ", " "); // <---- these two
>lines if removed make the entire if statement skipped
> dateDiff=serverDate-curDate;
> }
>
> if(dateDiff>offSetSec) {
> TimSetSeconds(serverDate);
> return 2;
> }
>
> return 1;
>}
Ken Krugler
TransPac Software, Inc.
<http://www.transpac.com>
+1 530-470-9200
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