[Bug target/43297] [4.4 regression] -O2 -fPIC breaks htmlnorm.c

[ebotcazou at gcc dot gnu dot org]

--- Comment #6 from ebotcazou at gcc dot gnu dot org  2010-09-19 12:07 
---
Created an attachment (id=21834)
 -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21834action=view)
More reduced testcase


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43297

[Bug target/43297] [4.4 regression] -O2 -fPIC breaks htmlnorm.c

[ebotcazou at gcc dot gnu dot org]

--- Comment #7 from ebotcazou at gcc dot gnu dot org  2010-09-19 12:16 
---
Fixed in latest 4.4.x snapshot:

ebotca...@grobluk:~$ gcc -v
Using built-in specs.
Target: sparc64-unknown-linux-gnu
Configured with: /home/ebotcazou/src-4.4/configure
--prefix=/home/ebotcazou/install-4.4 --enable-languages=c --with-cpu=v8
Thread model: posix
gcc version 4.4.5 20100914 (prerelease) (GCC)


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ebotcazou at gcc dot gnu dot org changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
  Known to work|4.3.3   |4.3.3 4.5.1 4.6.0
 Resolution||FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43297

[Bug target/43297] [4.4 regression] -O2 -fPIC breaks htmlnorm.c

[ebotcazou at gcc dot gnu dot org]

--- Comment #5 from ebotcazou at gcc dot gnu dot org  2010-09-18 08:48 
---
Investigating.


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ebotcazou at gcc dot gnu dot org changed:

   What|Removed |Added

 CC|ebotcazou at gcc dot gnu dot|
   |org |
 AssignedTo|unassigned at gcc dot gnu   |ebotcazou at gcc dot gnu dot
   |dot org |org
 Status|NEW |ASSIGNED
   Last reconfirmed|2010-07-09 10:25:26 |2010-09-18 08:48:04
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43297

[Bug target/43297] [4.4 regression] -O2 -fPIC breaks htmlnorm.c

[ebotcazou at gcc dot gnu dot org]

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ebotcazou at gcc dot gnu dot org changed:

   What|Removed |Added

 Status|WAITING |NEW
 Ever Confirmed|0   |1
   Last reconfirmed|-00-00 00:00:00 |2010-07-09 10:25:26
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43297

[Bug target/43297] [4.4 regression] -O2 -fPIC breaks htmlnorm.c

[jakub at gcc dot gnu dot org]

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jakub at gcc dot gnu dot org changed:

   What|Removed |Added

   Target Milestone|4.4.4   |4.4.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43297

[Bug target/43297] [4.4 regression] -O2 -fPIC breaks htmlnorm.c

[rguenth at gcc dot gnu dot org]

--- Comment #3 from rguenth at gcc dot gnu dot org  2010-03-09 12:30 ---
Please test a more recent version from the 4.4 branch (and trunk if possible).


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rguenth at gcc dot gnu dot org changed:

   What|Removed |Added

 Status|UNCONFIRMED |WAITING
  Known to fail||4.4.1
  Known to work||4.3.3
   Target Milestone|--- |4.4.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43297

[Bug target/43297] [4.4 regression] -O2 -fPIC breaks htmlnorm.c

[edwintorok at gmail dot com]

--- Comment #4 from edwintorok at gmail dot com  2010-03-09 13:01 ---
(In reply to comment #3)
 Please test a more recent version from the 4.4 branch (and trunk if possible).
 

Ok, I found gcc 4.4.3 on gcc200 and it still produces wrong code:
$ /opt/cfarm/release/4.4.3/bin/gcc -v
Using built-in specs.
Target: sparc64-unknown-linux-gnu
Configured with: ../gcc-4.4.3/configure --prefix=/opt/cfarm/release/4.4.3
--disable-werror --enable-languages=c,c++,fortran,ada --enable-__cxa_atexit
--disable-nls --enable-threads=posix --with-gmp=/opt/cfarm/gmp-4.2.4
--with-mpfr=/opt/cfarm/mpfr-2.4.2 --with-cpu=v8 --disable-multilib
Thread model: posix
gcc version 4.4.3 (GCC)

$ /opt/cfarm/release/4.4.3/bin/gcc -O2 -fPIC hh.c
$ ./a.out
Aborted

It seems to be a problem only when creating 32-bit code, -m64 works fine:
$ /opt/cfarm/release/4.4.3-64/bin/gcc -O2 -fPIC -m64 hh.c
$./a.out
And -m32 aborts of course:
$ /opt/cfarm/release/4.4.3-64/bin/gcc -O2 -fPIC -m32 hh.c
$./a.out

/opt/cfarm/release/4.4.3-64/bin/gcc -v
Using built-in specs.
Target: sparc64-unknown-linux-gnu
Configured with: ../gcc-4.4.3/configure --prefix=/opt/cfarm/release/4.4.3-64
--disable-werror --enable-languages=c,c++,fortran,ada --enable-__cxa_atexit
--disable-nls --enable-threads=posix --with-gmp=/opt/cfarm/gmp-4.2.4-64
--with-mpfr=/opt/cfarm/mpfr-2.4.2-64
Thread model: posix
gcc version 4.4.3 (GCC)
Aborted


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edwintorok at gmail dot com changed:

   What|Removed |Added

  Known to fail|4.4.1   |4.4.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43297