Ubuntu
codeblocks package

codeblocks version 10.05-2 failed to build on armel

Bug #791327 reported by Ricardo Salveti
12
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Linaro GCC
Fix Released
Medium
Ramana Radhakrishnan
Linaro GCC 4.6-2011.07
gcc
Fix Released
Medium
codeblocks (Ubuntu)
Fix Released
Undecided
Unassigned
gcc-4.6 (Ubuntu)
Fix Released
Medium
Unassigned

Bug Description

codeblocks version 10.05-2 failed to build on armel
Link to failed build: https://launchpad.net/ubuntu/+source/codeblocks/10.05-2/+build/2465152

Direct link to the build log: https://launchpad.net/ubuntu/+source/codeblocks/10.05-2/+build/2465152/+files/buildlog_ubuntu-oneiric-armel.codeblocks_10.05-2_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 3494 lines into the build log:

/tmp/ccQ2nsvc.s: Assembler messages:
/tmp/ccQ2nsvc.s:5100: Error: r13 not allowed here -- `rsb ip,sp,ip,lsl#2'
make[5]: *** [byocbtris.lo] Error 1
make[5]: Leaving directory `/build/buildd/codeblocks-10.05/src/plugins/contrib/byogames'
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory `/build/buildd/codeblocks-10.05/src/plugins/contrib'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/build/buildd/codeblocks-10.05/src/plugins'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/build/buildd/codeblocks-10.05/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/build/buildd/codeblocks-10.05'
dh_auto_build: make -j1 returned exit code 2
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110512-0159
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/codeblocks-10.05

Related branches

lp:~ramana/gcc-linaro/backport-bug-fixes-4.6
Ulrich Weigand (community): Approve
Diff: 105 lines (+43/-8)
4 files modified
ChangeLog.linaro (+22/-0)
gcc/config/arm/arm.md (+15/-7)
gcc/config/arm/predicates.md (+3/-0)
gcc/config/arm/thumb2.md (+3/-1)
lp:ubuntu/oneiric/gcc-4.6
lp:debian/gcc-4.6
lp:debian/gnat-4.6
Revision history for this message
Marcin Juszkiewicz (hrw) wrote :

Thumb2 issue?

Revision history for this message
Ramana Radhakrishnan (ramana) wrote :

This looks like a compiler bug.

bin/bash ../../../../libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I../../../../src/include -I/usr/lib/wx/include/gtk2-unicode-release-2.8 -I/usr/include/wx-2.8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -D__WXGTK__ -pthread -I../../../../src/include -I../../../../src/sdk/wxscintilla/include -Ulinux -Uunix -O2 -ffast-math -DCB_AUTOCONF -g -O2 -DCB_PRECOMP -Winvalid-pch -fPIC -DPIC -fexceptions -c -o byocbtris.lo byocbtris.cpp
libtool: compile: g++ -DHAVE_CONFIG_H -I. -I../../../../src/include -I/usr/lib/wx/include/gtk2-unicode-release-2.8 -I/usr/include/wx-2.8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -D__WXGTK__ -pthread -I../../../../src/include -I../../../../src/sdk/wxscintilla/include -Ulinux -Uunix -O2 -ffast-math -DCB_AUTOCONF -g -O2 -DCB_PRECOMP -Winvalid-pch -fPIC -DPIC -fexceptions -c byocbtris.cpp -fPIC -DPIC -o .libs/byocbtris.o
/tmp/ccQ2nsvc.s: Assembler messages:
/tmp/ccQ2nsvc.s:5100: Error: r13 not allowed here -- `rsb ip,sp,ip,lsl#2'

Reduced testcase :
g++ -c -O2 -march=armv7-a tst.cpp

$> cat tst.cpp

#include <string.h>
typedef int ChunkConfig[16];

void AlignChunk(ChunkConfig& chunk)
{

    int rowsShift = 0;
    while ( rowsShift<4 )
    {
        bool isEmpty = true;
        for ( int x=0; x<4; x++ )
            if ( chunk[rowsShift*4+x] != 0 )
            {
                isEmpty = false;
                break;
            }
        if ( !isEmpty ) break;
        rowsShift++;
    }

    int colsShift = 0;
    while ( colsShift<4 )
    {
        bool isEmpty = true;
        for ( int y=0; y<4; y++ )
            if ( chunk[colsShift+y*4] != 0 )
            {
                isEmpty = false;
                break;
            }
        if ( !isEmpty ) break;
        colsShift++;
    }

    if ( !colsShift && !rowsShift ) return;

    ChunkConfig newChunk;
    memset(newChunk,0,sizeof(newChunk));
    for ( int y=rowsShift,y2=0; y<4; y++,y2++ )
        for ( int x=colsShift,x2=0; x<4; x++,x2++ )
            newChunk[x2+y2*4] = chunk[x+y*4];
    memcpy(chunk,newChunk,sizeof(chunk));
}

Ramana

Revision history for this message
In , Michael Hope (michaelh1) wrote :

Created attachment 24468
Reduced test case

The attached testcase is derived from codeblocks 10.05 and fails to build on ARM due to generating invalid assembler.

To reproduce:

michaelh@ursa2:~/linaro/bugs$ ~/linaro/toolchains/gcc-4.7~svn174795-armv7l-maverick-cbuild127-ursa3-cortexa9r1/bin/g++ -c -O2 -save-temps lp791327.cpp

lp791327.s: Assembler messages:
lp791327.s:76: Error: r13 not allowed here -- `rsb r0,sp,r0,lsl#2'

The fault occurs in 4.6.0 and current trunk. It does not occur in 4.5.3.

Originally reported at https://bugs.launchpad.net/ubuntu/+source/codeblocks/+bug/791327

Revision history for this message
In , Michael Hope (michaelh1) wrote :

Forgot the configuration:

Configured with: '../../gcc-4.7~/configure' --prefix='/scratch/cbuild/slave/slaves/ursa3/gcc-4.7~svn174795/gcc/default/install' --enable-languages=c,c++,objc,obj-c++,fortran,lto --with-mode=thumb --with-arch=armv7-a --with-tune=cortex-a9 --with-float=softfp --with-fpu=neon
Thread model: posix
gcc version 4.7.0 20110608 (experimental) [trunk revision 174795] (GCC)

michaelh@ursa2:~/linaro/bugs$ as -v
GNU assembler version 2.20.51 (arm-linux-gnueabi) using BFD version (GNU Binutils for Ubuntu) 2.20.51-system.20100908

michaelh@ursa2:~/linaro/bugs$ uname -a
Linux ursa2 2.6.35.3-cbuild2+ #8 SMP Mon Apr 4 12:46:46 NZST 2011 armv7l GNU/Linux

michaelh@ursa2:~/linaro/bugs$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.10
Release: 10.10
Codename: maverick

The fault also occurs at -O1 and -O3 but not at -O0.

The assembly in the region is:

.L33:
 movs r1, #0
 movs r2, #64
 mov r0, sp
 mov r9, sp
 bl memset
 cmp r4, #4
 beq .L11
 add r0, r8, r4, lsl #2
 rsb r6, r8, #4
 lsls r6, r6, #2
 rsb r1, r4, #4
 rsb r0, sp, r0, lsl #2
 mov r4, sp
 mov lr, #0

which matches the final lines of the function. It looks like the code should be using r9 instead of sp.

Revision history for this message
Michael Hope (michaelh1) wrote :

Submitted upstream: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49335

Launchpad won't let me attach it...

Changed in gcc-linaro:
status: New → Confirmed
importance: Undecided → Medium
Revision history for this message
Michael Hope (michaelh1) wrote :

Confirmed in gcc-linaro-4.6-2011.05, gcc-4.6.0, and gcc trunk r174795.

Does not exist in gcc-linaro-4.5-2011.05 or gcc 4.5.3.

Fails at -O1, -O2, and -O3. The work-around is to build at -O0.

Changed in gcc-linaro:
status: Confirmed → Triaged
Revision history for this message
In , Ramana-gcc (ramana-gcc) wrote :

The problem is that *arith_shiftsi allows *all* shiftable operators to have the stack pointer as Rn .

In Thumb2 only the add and sub instructions are allowed to have the stack pointer in this form and all other instructions are UNPREDICTABLE. This has come as a result of merging the 2 patterns from ARM and Thumb2 into a single pattern and considering the same for both.

Affects only 4.6 branch and FSF trunk.

cheers
Ramana

Revision history for this message
In , Ramana-gcc (ramana-gcc) wrote :

(In reply to comment #2)
> The problem is that *arith_shiftsi allows *all* shiftable operators to have the
> stack pointer as Rn .
>
> In Thumb2 only the add and sub instructions are allowed to have the stack
> pointer in this form and all other instructions are UNPREDICTABLE.

This is for operations of the form :

<operation> rd, rn, rm lsl 2

cheers
Ramana

Marcin Juszkiewicz (hrw)
affects: codeblocks → gcc
Revision history for this message
In , Michael Hope (michaelh1) wrote :

Also affects gimp. See LP: #791279.

Doesn't appear in trunk r172224 but does in r174795.

Bug Watch Updater (bug-watch-updater)
Changed in gcc:
importance: Unknown → Medium
status: Unknown → Confirmed
Revision history for this message
In , Ramana-gcc (ramana-gcc) wrote :

Author: ramana
Date: Fri Jun 24 13:15:08 2011
New Revision: 175375

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=175375
Log:
Fix PR target/49335

2011-06-24 Ramana Radhakrishnan <email address hidden>

 PR target/49335
 * config/arm/predicates.md (add_operator): New.
 * config/arm/arm.md ("*arith_shiftsi"): Fix for SP reg usage
 in Thumb2.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm.md
    trunk/gcc/config/arm/predicates.md

Revision history for this message
In , Jakub-gcc (jakub-gcc) wrote :

GCC 4.6.1 is being released.

Ramana Radhakrishnan (ramana)
Changed in gcc-linaro:
assignee: nobody → Ramana Radhakrishnan (ramana)
milestone: none → 4.6-2011.07
status: Triaged → Fix Committed
Revision history for this message
In , Ramana-gcc (ramana-gcc) wrote :

Author: ramana
Date: Wed Jul 6 12:38:26 2011
New Revision: 175911

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=175911
Log:

2011-07-06 Ramana Radhakrishnan <email address hidden>

 Backport from mainline.
 2011-06-24 Ramana Radhakrishnan <email address hidden>

 PR target/49335
 * config/arm/predicates.md (add_operator): New.
 * config/arm/arm.md ("*arith_shiftsi"): Fix for SP reg usage
 in Thumb2.

Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/config/arm/arm.md
    branches/gcc-4_6-branch/gcc/config/arm/predicates.md

Revision history for this message
In , Ramana-gcc (ramana-gcc) wrote :

Fixed.

Bug Watch Updater (bug-watch-updater)
Changed in gcc:
status: Confirmed → Fix Released
Ricardo Salveti (rsalveti)
Changed in gcc-4.6 (Ubuntu):
status: New → Triaged
importance: Undecided → Medium
Michael Hope (michaelh1)
Changed in gcc-linaro:
status: Fix Committed → Fix Released
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package gcc-4.6 - 4.6.1-4ubuntu2

---------------
gcc-4.6 (4.6.1-4ubuntu2) oneiric; urgency=low

  * Update to SVN 20110720 (r176494) from the gcc-4_6-branch.
    - Fix PR target/49541, PR tree-optimization/49768, PR middle-end/49675,
      PR target/49746, PR middle-end/49732, PR tree-optimization/49725,
      PR target/49723, PR target/49541, PR tree-opt/49309, PR c++/49785,
      PR ada/48711, PR ada/46350, PR fortran/49648, PR testsuite/49753,
      PR tree-optimization/49309.
  * Update the Linaro support to the 4.6-2011.07-0 release.
    - Fix PR target/49335. LP: #791327.
  * Update gcc-multiarch:
    - Add -print-multiarch option.
    - Fix library path for non-default multilib(s).
    - Handle `.' in MULTILIB_DIRNAMES.
  * Add support to build multilib on armel and armhf, only enable it for
    Ubuntu/oneiric. LP: #810360.
 -- Matthias Klose <email address hidden> Wed, 20 Jul 2011 17:44:32 +0200

Changed in gcc-4.6 (Ubuntu):
status: Triaged → Fix Released
Revision history for this message
Ricardo Salveti (rsalveti) wrote :

Rebuild worked fine.

Changed in codeblocks (Ubuntu):
status: New → Fix Released
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