[Bug middle-end/38426] New: Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[Bug middle-end/38426] New: Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[d dot g dot gorbachev at gmail dot com]

GCC-4.4

_PsConvertToGuiThread@0:
        pushl   %ebp
        pushl   %edi
        pushl   %esi
        pushl   %ebx
        subl    $28, %esp
        movl    -2100956, %ebx
        movl    56(%ebx), %ebp

%ebp is used as a spare register in a non-leaf function.


-- 
           Summary: Incorrect code produced with -momit-leaf-frame-pointer -
                    fno-unit-at-a-time
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: d dot g dot gorbachev at gmail dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i386-pc-mingw32


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426

[Bug middle-end/38426] Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[d dot g dot gorbachev at gmail dot com]

------- Comment #1 from d dot g dot gorbachev at gmail dot com  2008-12-06 09:52 -------
Created an attachment (id=16839)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16839&action=view)
Preprocessed source

mingw32-gcc -S -Os -momit-leaf-frame-pointer -fno-unit-at-a-time win32.i

C source:
<http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ps/win32.c?revision=37615&content-type=text%2Fplain>


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426

[Bug middle-end/38426] Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[d dot g dot gorbachev at gmail dot com]

------- Comment #2 from d dot g dot gorbachev at gmail dot com  2008-12-09 01:11 -------
Ira() calls setup_eliminable_regset() at ira.c:1794, which calls
ix86_frame_pointer_required() at ira.c:1296, which checks
current_function_is_leaf, but this variable is updated only at ira.c:1866.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426

[Bug rtl-optimization/38426] Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[d dot g dot gorbachev at gmail dot com]

------- Comment #3 from d dot g dot gorbachev at gmail dot com  2008-12-09 20:31 -------
Patch: http://gcc.gnu.org/ml/gcc-patches/2008-12/msg00583.html


-- 

d dot g dot gorbachev at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|middle-end                  |rtl-optimization


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426

[Bug rtl-optimization/38426] [4.4 Regression] Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2008-12-23 23:34 -------
Confirmed.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2008-
                   |                            |12/msg00583.html
           Severity|normal                      |blocker
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |patch, ra, wrong-code
      Known to fail|                            |4.4.0
      Known to work|                            |4.3.0
   Last reconfirmed|0000-00-00 00:00:00         |2008-12-23 23:34:31
               date|                            |
            Summary|Incorrect code produced with|[4.4 Regression] Incorrect
                   |-momit-leaf-frame-pointer - |code produced with -momit-
                   |fno-unit-at-a-time          |leaf-frame-pointer -fno-
                   |                            |unit-at-a-time
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426

[Bug rtl-optimization/38426] [4.4 Regression] Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|blocker                     |normal
           Priority|P3                          |P2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426

[Bug rtl-optimization/38426] [4.4 Regression] Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2009-01-05 23:33 -------
A better patch was posted and approved: 
http://gcc.gnu.org/ml/gcc-patches/2009-01/msg00155.html

-- Pinski


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|http://gcc.gnu.org/ml/gcc-  |http://gcc.gnu.org/ml/gcc-
                   |patches/2008-               |patches/2009-
                   |12/msg00583.html            |01/msg00155.html


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426

[Bug rtl-optimization/38426] [4.4 Regression] Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[rsandifo at gcc dot gnu dot org]

------- Comment #6 from rsandifo at gcc dot gnu dot org  2009-01-06 21:58 -------
Subject: Bug 38426

Author: rsandifo
Date: Tue Jan  6 21:58:46 2009
New Revision: 143135

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=143135
Log:
gcc/
        PR rtl-optimization/38426.
        * ira.c (ira): Set current_function_is_leaf earlier.

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


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426

[Bug rtl-optimization/38426] [4.4 Regression] Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[rsandifo at gcc dot gnu dot org]

------- Comment #7 from rsandifo at gcc dot gnu dot org  2009-01-06 22:02 -------
Fixed on mainline.  Dmitry, sorry for the duplicate work.


-- 

rsandifo at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426

[Bug rtl-optimization/38426] [4.4 Regression] Incorrect code produced with -momit-leaf-frame-pointer -fno-unit-at-a-time

[d dot g dot gorbachev at gmail dot com]

------- Comment #8 from d dot g dot gorbachev at gmail dot com  2009-01-07 16:01 -------
> sorry for the duplicate work.

Thanks for fixing it!


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38426