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* [Bug rtl-optimization/23684] New: Combine stores for non strict alignment targets
@ 2005-09-01 18:05 pinskia at gcc dot gnu dot org
  2005-09-01 18:07 ` [Bug rtl-optimization/23684] " pinskia at gcc dot gnu dot org
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-01 18:05 UTC (permalink / raw)
  To: gcc-bugs

Take the following code:
#define OSSwapHostToBigInt32
void foo(char *input) {
  input[0] = 'H';
  input[1] = 'e';
  input[2] = 'l';
  input[3] = 'l';
  input[4] = 'o';
  input[5] = ' ';
  input[6] = 'w';
  input[7] = 'o';
  input[8] = 'r';
  input[9] = 'l';
  input[10] = 'd';
  input[11] = '\0';
}

void bar(char *input) {
  ((unsigned int *)input)[0] = OSSwapHostToBigInt32('Hell');
  ((unsigned int *)input)[1] = OSSwapHostToBigInt32('o wo');
  ((unsigned int *)input)[2] = OSSwapHostToBigInt32('rld\0');
}

They should generate the same asm but currently don't.  Note change OSSwapHostToBigInt32 to correct 
for little endian.

-- 
           Summary: Combine stores for non strict alignment targets
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23684


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [Bug rtl-optimization/23684] Combine stores for non strict alignment targets
  2005-09-01 18:05 [Bug rtl-optimization/23684] New: Combine stores for non strict alignment targets pinskia at gcc dot gnu dot org
@ 2005-09-01 18:07 ` pinskia at gcc dot gnu dot org
  2005-09-07  1:42 ` amodra at bigpond dot net dot au
  2005-09-15 20:15 ` pinskia at gcc dot gnu dot org
  2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-01 18:07 UTC (permalink / raw)
  To: gcc-bugs



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
 GCC target triplet|                            |powerpc-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23684


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [Bug rtl-optimization/23684] Combine stores for non strict alignment targets
  2005-09-01 18:05 [Bug rtl-optimization/23684] New: Combine stores for non strict alignment targets pinskia at gcc dot gnu dot org
  2005-09-01 18:07 ` [Bug rtl-optimization/23684] " pinskia at gcc dot gnu dot org
@ 2005-09-07  1:42 ` amodra at bigpond dot net dot au
  2005-09-15 20:15 ` pinskia at gcc dot gnu dot org
  2 siblings, 0 replies; 4+ messages in thread
From: amodra at bigpond dot net dot au @ 2005-09-07  1:42 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From amodra at bigpond dot net dot au  2005-09-07 01:42 -------
Also even when -mstrict-align if using
typedef char align_char __attribute__ ((aligned (4)));
void foo (align_char *input) ...


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23684


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [Bug rtl-optimization/23684] Combine stores for non strict alignment targets
  2005-09-01 18:05 [Bug rtl-optimization/23684] New: Combine stores for non strict alignment targets pinskia at gcc dot gnu dot org
  2005-09-01 18:07 ` [Bug rtl-optimization/23684] " pinskia at gcc dot gnu dot org
  2005-09-07  1:42 ` amodra at bigpond dot net dot au
@ 2005-09-15 20:15 ` pinskia at gcc dot gnu dot org
  2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-15 20:15 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-15 20:14 -------
Confirmed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-09-15 20:14:53
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23684


^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2005-09-15 20:15 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-09-01 18:05 [Bug rtl-optimization/23684] New: Combine stores for non strict alignment targets pinskia at gcc dot gnu dot org
2005-09-01 18:07 ` [Bug rtl-optimization/23684] " pinskia at gcc dot gnu dot org
2005-09-07  1:42 ` amodra at bigpond dot net dot au
2005-09-15 20:15 ` pinskia at gcc dot gnu dot org

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