[sdcc-devel] [ sdcc-Bugs-862241 ] Make an empty string are optimized away

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

Bugs item #862241, was opened at 2003-12-18 07:06
Message generated for change (Comment added) made by epetrich
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100599&aid=862241&group_id=599

Category: None
>Group: fixed
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
>Assigned to: Erik Petrich (epetrich)
Summary: Make an empty string are optimized away

Initial Comment:
/* 
*   The empty string symptom
*   Make an empty string and sdcc will optimize it away.
*/

void doit(char *str);

void doit(char *str)
{
  str;
}

void main()
{
  doit("Test");        // This line produces __str_0:
  doit("Test\0Test");  // This line produces __str_1:
  doit("\0");          // This line produces __str_2:
  doit("");            // This line produces __str_3: 
}
 
/* 
* This is the tail of the assmbly code you will get with 
sdcc:
*   
*   .area CSEG    (CODE)
* __str_0:
*   .ascii "Test"
*   .db 0x00
* __str_1:
*   .ascii "Test"
*   .db 0x00
*   .ascii "Test"
*   .db 0x00
* __str_2:
* __str_3:
*   .area XINIT   (CODE)
*
* In my oppinion this would be better, wouldn't it?
*   
* .area CSEG    (CODE)
* __str_0:
*   .ascii "Test"
*   .db 0x00
* __str_1:
*   .ascii "Test"
*   .db 0x00
*   .ascii "Test"
*   .db 0x00
* __str_2:
*   .db 0x00  ; This string is not empty. It contains a 
NULL, 
*   .db 0x00  ; and it is terminated by a NULL (It makes 
no sence, but it is the truth.)
* __str_3:
*   .db 0x00  ; This string is an empty string, terminatet 
by NULL.
*   .area XINIT   (CODE)
*

*/

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

>Comment By: Erik Petrich (epetrich)
Date: 2003-12-18 15:25

Message:
Logged In: YES 
user_id=635249

Fixed with src/SDCCast.c 1.203 and src/SDCCglue.c 1.161


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

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100599&aid=862241&group_id=599