[Bug bootstrap/53728] [4.6 regression] Bootstrap comparison failure (gcc/varasm.o differs) with CFLAGS="-O2 -march=pentium3"

2013-03-11 Thread ubizjak at gmail dot com 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53728



--- Comment #7 from Uros Bizjak  2013-03-11 22:43:38 
UTC ---

Testcase:



--cut here--

extern int global_options;

extern unsigned char *mode_size;



extern int printf (const char *, ...);



void mergeable_constant_section (int mode, unsigned long long align)

{

  unsigned int modesize = mode_size[mode] * 8;



  if (global_options && modesize <= align && (align & (align - 1)) == 0)

{

  unsigned int flags;



  printf ("%d", (int) (align / 8));

  flags = align / 8;

  printf ("%u", (unsigned int) flags);

}

}

--cut here--



$ ~/gcc-build-46/gcc/xgcc -B ~/gcc-build-46/gcc -O2 -m32 -march=pentium3 \

-fcompare-debug pr53728.c

xgcc: error: pr53728.c: -fcompare-debug failure (length)

[Bug bootstrap/53728] [4.6 regression] Bootstrap comparison failure (gcc/varasm.o differs) with CFLAGS="-O2 -march=pentium3"

2013-03-11 Thread ubizjak at gmail dot com 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53728



Uros Bizjak  changed:



   What|Removed |Added



 Status|WAITING |NEW



--- Comment #6 from Uros Bizjak  2013-03-11 21:31:26 
UTC ---

(In reply to comment #5)



> This is a compare-debug failure with -O2 -march=pentium3



Also fails on gcc-4_6 x86_64 with -O2 -m32 -march=pentium3



~/gcc-build-46/prev-gcc/xgcc -B ~/gcc-build-46/prev-gcc

-O2 -march=pentium3 -fcompare-debug -m32 varasm.i 

xgcc: error: varasm.i: -fcompare-debug failure (length)



xgcc (GCC) 4.6.4 20130311 (prerelease) [gcc-4_6-branch revision 196601]

[Bug bootstrap/53728] [4.6 regression] Bootstrap comparison failure (gcc/varasm.o differs) with CFLAGS="-O2 -march=pentium3"

2013-03-11 Thread ubizjak at gmail dot com 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53728



--- Comment #5 from Uros Bizjak  2013-03-11 21:11:00 
UTC ---

Created attachment 29646

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29646

Preprocessed source of the file that miscompares during bootstrap



This is a compare-debug failure with -O2 -march=pentium3



~/gcc-build-46/prev-gcc/xgcc -B ~/gcc-build-46/prev-gcc -O2 -march=pentium3

-fcompare-debug varasm.i 

xgcc: error: varasm.i: -fcompare-debug failure (length)



Where gcc was configured with:



CC="gcc -m32" ~/gcc-svn/branches/gcc-4_6-branch/configure

--host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --with-arch=i686

--enable-languages=c

[Bug bootstrap/53728] [4.6 regression] Bootstrap comparison failure (gcc/varasm.o differs) with CFLAGS="-O2 -march=pentium3"

2013-02-15 Thread ubizjak at gmail dot com 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53728



--- Comment #4 from Uros Bizjak  2013-02-15 12:23:16 
UTC ---

(In reply to comment #3)



> > Please test the source from the latest 4.6 SVN branch.

> 

> Still fails



Then I need exact steps how to trigger the failure on my x86_64-linux, with the

official version from FSF SVN. Following the procedure, described in Comment 1,

the compilation didn't fail for me.



Leaving in WAITING state until exact recipe is available.

[Bug bootstrap/53728] [4.6 regression] Bootstrap comparison failure (gcc/varasm.o differs) with CFLAGS="-O2 -march=pentium3"

2013-02-15 Thread xarthisius.kk at gmail dot com 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53728



--- Comment #3 from Kacper Kowalik  2013-02-15 
11:45:13 UTC ---

(In reply to comment #2)

> Please test the source from the latest 4.6 SVN branch.



I've got report from user claiming that:



commit 10612cb1b937163dcb5207913814a2fa5902cfa2

Author: gccadmin 

Date:   Fri Feb 15 00:17:27 2013 +



Daily bump.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@196061

138bc75d-0d04-0410-961f-82ee72b054a



Still fails

[Bug bootstrap/53728] [4.6 regression] Bootstrap comparison failure (gcc/varasm.o differs) with CFLAGS="-O2 -march=pentium3"

2013-02-09 Thread ubizjak at gmail dot com 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53728



Uros Bizjak  changed:



   What|Removed |Added



 Status|UNCONFIRMED |WAITING

   Last reconfirmed||2013-02-10

 Ever Confirmed|0   |1



--- Comment #2 from Uros Bizjak  2013-02-10 07:57:30 
UTC ---

Please test the source from the latest 4.6 SVN branch.

[Bug bootstrap/53728] [4.6 regression] Bootstrap comparison failure (gcc/varasm.o differs) with CFLAGS="-O2 -march=pentium3"

2013-01-30 Thread ubizjak at gmail dot com 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53728



--- Comment #1 from Uros Bizjak  2013-01-30 23:09:05 
UTC ---

Can you try to build from latest 4.6 branch SVN?



The bootstrap works for me with:



CC="gcc -m32" ~/gcc-svn/branches/gcc-4_6-branch/configure

--host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --with-arch=i686

--enable-languages=c



and



make -j 8 BOOT_CFLAGS="-O2 -march=pentium3 -pipe" bootstrap-lean



for



gcc version 4.6.4 20130127 (prerelease) [gcc-4_6-branch revision 195496] (GCC)

[Bug bootstrap/53728] [4.6 regression] Bootstrap comparison failure (gcc/varasm.o differs) with CFLAGS="-O2 -march=pentium3"

2012-06-20 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53728

Richard Guenther  changed:

   What|Removed |Added

 Target||i686-pc-linux-gnu
   Target Milestone|--- |4.6.4