[Bug rtl-optimization/17752] New: Hot/cold basic block partitioning optimization has problems

[Bug rtl-optimization/17752] New: Hot/cold basic block partitioning optimization has problems

[ctice at apple dot com]

- This optimization scans forward in the instruction stream (2-3 instructions for each basic block),
    which is inefficient
- This optimization does not work properly with dwarf2 debug information  (the assembler     
    complains about attempting subtraction between labels in different sections).

-- 
           Summary: Hot/cold basic block partitioning optimization has
                    problems
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ctice at apple dot com
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17752

[Bug rtl-optimization/17752] Hot/cold basic block partitioning optimization has problems

[ctice at apple dot com]

------- Additional Comments From ctice at apple dot com  2004-09-30 17:35 -------
The following patches to fix these bugs have been submitted to gcc-patches:

http://gcc.gnu.org/ml/gcc-patches/2004-08/msg02673.html
http://gcc.gnu.org/ml/gcc-patches/2004-09/msg01714.html
http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02894.html

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17752

[Bug rtl-optimization/17752] Hot/cold basic block partitioning optimization has problems

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-09-30 17:42 -------
Confirmed, hopefully someone will review these soon.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |compile-time-hog, wrong-code
   Last reconfirmed|0000-00-00 00:00:00         |2004-09-30 17:42:47
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17752

[Bug rtl-optimization/17752] Hot/cold basic block partitioning optimization has problems

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-10-18 04:21 -------
I pinged them, hopefully someone will look into them soon :).

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17752

[Bug rtl-optimization/17752] Hot/cold basic block partitioning optimization has problems

[ctice at apple dot com]

------- Additional Comments From ctice at apple dot com  2004-10-18 16:06 -------
Subject: Re:  Hot/cold basic block partitioning optimization has problems


Actually, I had some private communication with Zack Weinberg, Mark  
Mitchell, and Richard
Henderson about the hot/cold patches.  The decision was that these are  
too intrusive to go
into stage 3, so I created a branch ('hot-cold-branch') to hold onto  
the patches until
stage 1 opens up again.

Thanks for  pursuing this Andrew.

--  Caroline Tice
ctice@apple.com

On Oct 17, 2004, at 9:21 PM, pinskia at gcc dot gnu dot org wrote:

>
> ------- Additional Comments From pinskia at gcc dot gnu dot org   
> 2004-10-18 04:21 -------
> I pinged them, hopefully someone will look into them soon :).
>
> --  
>            What    |Removed                     |Added
> ----------------------------------------------------------------------- 
> -----
>    Target Milestone|---                         |4.0.0
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17752
>
> ------- You are receiving this mail because: -------
> You reported the bug, or are watching the reporter.



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17752

[Bug rtl-optimization/17752] Hot/cold basic block partitioning optimization has problems

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.0.0                       |---


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17752

[Bug rtl-optimization/17752] Hot/cold basic block partitioning optimization has problems

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2004-09-30 17:42:47         |2005-03-06 15:37:17
               date|                            |
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17752

[Bug rtl-optimization/17752] Hot/cold basic block partitioning optimization has problems

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-06-12 03:29 -------
All of these three issues have now been fixed.  Closing as fixed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17752