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* optimization/7351: Postincrment optimisation problem
@ 2002-07-18 10:56 geert.deprins
  0 siblings, 0 replies; 2+ messages in thread
From: geert.deprins @ 2002-07-18 10:56 UTC (permalink / raw)
  To: gcc-gnats; +Cc: geert.deprins


>Number:         7351
>Category:       optimization
>Synopsis:       Postincrment optimisation problem
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jul 18 10:56:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Geert De Prins
>Release:        3.0.3
>Organization:
>Environment:
Solaris 2.7
>Description:
Optimiser with -O2 level on seems to increment the pointer used in the source operand to early.

Sample code below (with -O2 the first character is missing):

#include <stdio.h>

void main()
{
   char szBuffer[256];
   char *p_cTag = szBuffer;
   
   strcpy(szBuffer,"Testtekst");

while(*p_cTag) /* scan from start to convert to uppercase */
	{
	*(p_cTag++) = toupper(*p_cTag);
	}

printf("Result:%s",szBuffer);
}

>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:


^ permalink raw reply	[flat|nested] 2+ messages in thread
* Re: optimization/7351: Postincrment optimisation problem
@ 2002-07-20 16:16 nathan
  0 siblings, 0 replies; 2+ messages in thread
From: nathan @ 2002-07-20 16:16 UTC (permalink / raw)
  To: gcc-bugs, gcc-prs, geert.deprins, geert.deprins, nobody

Synopsis: Postincrment optimisation problem

State-Changed-From-To: open->closed
State-Changed-By: nathan
State-Changed-When: Sat Jul 20 16:16:54 2002
State-Changed-Why:
    not a bug. Your code is undefined

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7351


^ permalink raw reply	[flat|nested] 2+ messages in thread
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