[Bug target/18145] New: Do not emit __do_copy_data or __do_clear_bss if .data or .bss is empty.

[Bug target/18145] New: Do not emit __do_copy_data or __do_clear_bss if .data or .bss is empty.

[ericw at evcohs dot com]

See FIXME in avr.c, function avr_file_start.

-- 
           Summary: Do not emit __do_copy_data or __do_clear_bss if .data or
                    .bss is empty.
           Product: gcc
           Version: 3.4.2
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ericw at evcohs dot com
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: avr-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18145

[Bug target/18145] Do not emit __do_copy_data or __do_clear_bss if .data or .bss is empty.

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-10-25 17:03 -------
Confirmed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |missed-optimization
   Last reconfirmed|0000-00-00 00:00:00         |2004-10-25 17:03:19
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18145

[Bug target/18145] Do not emit __do_copy_data or __do_clear_bss if .data or .bss is empty.

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-02-28 04:14 -------
*** Bug 20243 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |schlie at comcast dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18145

[Bug target/18145] Do not emit __do_copy_data or __do_clear_bss if .data or .bss is empty.

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18145

--- Comment #6 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-02-22 14:14:03 UTC ---
Author: gjl
Date: Wed Feb 22 14:13:48 2012
New Revision: 184481

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184481
Log:
    PR target/18145
    * config/avr/avr.c (avr_asm_output_aligned_decl_common): Skip
    setting avr_need_clear_bss_p for __gnu_lto* symbols.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/avr.c

[Bug target/18145] Do not emit __do_copy_data or __do_clear_bss if .data or .bss is empty.

[eric.weddington at atmel dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18145

Eric Weddington <eric.weddington at atmel dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.0

[Bug target/18145] Do not emit __do_copy_data or __do_clear_bss if .data or .bss is empty.

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18145

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|FIXME                       |
             Status|NEW                         |RESOLVED
                 CC|                            |gjl at gcc dot gnu.org
      Known to work|                            |4.7.0
         Resolution|                            |FIXED

--- Comment #5 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-04-20 13:46:42 UTC ---
Closed resolved+fixed in 4.7.0

[Bug target/18145] Do not emit __do_copy_data or __do_clear_bss if .data or .bss is empty.

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18145

--- Comment #4 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-04-20 13:38:09 UTC ---
Author: gjl
Date: Wed Apr 20 13:38:05 2011
New Revision: 172769

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=172769
Log:
    PR target/18145

    * config/avr/avr.h (TARGET_ASM_INIT_SECTIONS): Delete.
    (ASM_OUTPUT_COMMON, ASM_OUTPUT_LOCAL): Delete.
    (ASM_OUTPUT_ALIGNED_DECL_COMMON): Define.
    (ASM_OUTPUT_ALIGNED_DECL_LOCAL): Define.
    (TARGET_ASM_NAMED_SECTION): Change to avr_asm_named_section.

    * config/avr/avr-protos.h (avr_asm_output_aligned_common):
    New prototype.

    * config/avr/avr.c (TARGET_ASM_INIT_SECTIONS): Define.
    (avr_asm_named_section,    avr_asm_output_aligned_common,
    avr_output_data_section_asm_op,    avr_output_bss_section_asm_op):
    New functions to update...
    (avr_need_clear_bss_p, avr_need_copy_data_p): ...these new variables.
    (avr_asm_init_sections): Overwrite section callbacks for
    data_section, bss_section.
    (avr_file_start): Move output of __do_copy_data, __do_clear_bss
    from here to...
    (avr_file_end): ...here.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/avr-protos.h
    trunk/gcc/config/avr/avr.c
    trunk/gcc/config/avr/avr.h

[Bug target/18145] Do not emit __do_copy_data or __do_clear_bss if .data or .bss is empty.

[abnikant dot singh at atmel dot com]

------- Comment #3 from abnikant dot singh at atmel dot com  2010-09-14 08:17 -------
Created an attachment (id=21788)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21788&action=view)
attached patch solves this problem


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18145