[Bug c/36828] New: 4.3.1 when optimising for size generates much larger code than 4.0.x

[Bug c/36828] New: 4.3.1 when optimising for size generates much larger code than 4.0.x

[zoltan at bendor dot com dot au]

The attached C file generates a significantly larger object code with the new
compiler than with the old one. The exact command line for gcc is in the first
comment of the C file.


-- 
           Summary: 4.3.1 when optimising for size generates much larger
                    code than 4.0.x
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zoltan at bendor dot com dot au
 GCC build triplet: x86-elf-linux
  GCC host triplet: x86-elf-linux
GCC target triplet: arm-elf-unknown


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36828

[Bug middle-end/36828] 4.3.1 when optimising for size generates much larger code than 4.0.x

[zoltan at bendor dot com dot au]

------- Comment #1 from zoltan at bendor dot com dot au  2008-07-15 22:33 -------
Created an attachment (id=15915)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15915&action=view)
Test code to demonstrate the size increase

A short C file that compiles to about 60% larger with the new compiler, command
line options can be find in the file itself


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36828

[Bug middle-end/36828] 4.3.1 when optimising for size generates much larger code than 4.0.x

[joel at gcc dot gnu dot org]

------- Comment #2 from joel at gcc dot gnu dot org  2008-07-15 22:44 -------
I attached this code earlier for you to
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31849 along with size reports for
various optimization levels (Os, O1, and O2) and gcc versions.  Is this a dupe
of that PR or separate?  Can someone familiar with 31849 make a ruling?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36828

[Bug middle-end/36828] 4.3.1 when optimising for size generates much larger code than 4.0.x

[ramana at gcc dot gnu dot org]

------- Comment #3 from ramana at gcc dot gnu dot org  2009-04-29 15:50 -------
The size regression occurs with 4.3.x but with trunk today I see a size
reduction to 992 bytes which is in the ball park of the original size.


-- 

ramana at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-04-29 15:50:22
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36828

[Bug middle-end/36828] 4.3.1 when optimising for size generates much larger code than 4.0.x

[joel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36828

--- Comment #4 from Joel Sherrill <joel at gcc dot gnu.org> ---
Based on the last comment, should this PR be closed. It has been five years.