[Bug middle-end/27567] [4.0/4.1/4.2 Regression] __builtin_memcpy generates redundant stores/moves.

2007-02-20 Thread pluto at agmk dot net 


--- Comment #9 from pluto at agmk dot net  2007-02-20 10:25 ---
adjust summary ( 4.2 regression status reopened ).


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pluto at agmk dot net changed:

   What|Removed |Added

Summary|[4.0/4.1 Regression]|[4.0/4.1/4.2 Regression]
   |__builtin_memcpy generates  |__builtin_memcpy generates
   |redundant stores/moves. |redundant stores/moves.


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27567

[Bug middle-end/27567] [4.0/4.1/4.2 Regression] __builtin_memcpy generates redundant stores/moves.

2006-09-01 Thread jakub at gcc dot gnu dot org 


--- Comment #6 from jakub at gcc dot gnu dot org  2006-09-02 06:55 ---
Subject: Bug 27567

Author: jakub
Date: Sat Sep  2 06:55:09 2006
New Revision: 116656

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116656
Log:
PR middle-end/27567
* builtins.c (fold_builtin_memcpy, fold_builtin_memmove): Remove.
(fold_builtin_mempcpy): Rename to...
(fold_builtin_memory_op): ... this.  Optimize one element copy
into an assignment.
(fold_builtin_memset, fold_builtin_bzero, fold_builtin_bcopy): New
functions.
(expand_builtin_strcpy, expand_builtin_strncpy): Handle COMPOUND_EXPR.
(expand_builtin_memcpy, expand_builtin_mempcpy,
expand_builtin_memmove): Likewise.  Use fold_builtin_memory_op.
(fold_builtin_1): Handle BUILT_IN_MEMSET, BUILT_IN_BZERO and
BUILT_IN_BCOPY.  Use fold_builtin_memory_op for
BUILT_IN_MEM{CPY,PCPY,MOVE}.

Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27567

[Bug middle-end/27567] [4.0/4.1/4.2 Regression] __builtin_memcpy generates redundant stores/moves.

2006-08-30 Thread patchapp at dberlin dot org 


--- Comment #5 from patchapp at dberlin dot org  2006-08-30 15:50 ---
Subject: Bug number PR middle-end/27567

A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is
http://gcc.gnu.org/ml/gcc-patches/2006-08/msg01134.html


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27567

[Bug middle-end/27567] [4.0/4.1/4.2 Regression] __builtin_memcpy generates redundant stores/moves.

2006-08-29 Thread jakub at gcc dot gnu dot org 


--- Comment #4 from jakub at gcc dot gnu dot org  2006-08-29 14:35 ---
Playing with fold_builtin_mem*.


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jakub at gcc dot gnu dot org changed:

   What|Removed |Added

 AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
   |dot org |
 Status|NEW |ASSIGNED
   Last reconfirmed|2006-05-12 08:27:14 |2006-08-29 14:35:31
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27567

[Bug middle-end/27567] [4.0/4.1/4.2 Regression] __builtin_memcpy generates redundant stores/moves.

2006-08-27 Thread pinskia at gcc dot gnu dot org 


--- Comment #3 from pinskia at gcc dot gnu dot org  2006-08-27 19:00 ---
For PPC, we get:
stw 3,-16(1)
stw 3,48(1)
nop
nop
lfs 1,-16(1)
blr

Notice the extra store, that does not need to be there.


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pinskia at gcc dot gnu dot org changed:

   What|Removed |Added

  Component|rtl-optimization|middle-end
  GCC build triplet|x86-*-linux |
   GCC host triplet|x86-*-linux |
 GCC target triplet|x86-*-linux |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27567