https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65028
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
The same bug affects 252.eon in SPEC CPU 2000 on x32:
[hjl@gnu-mic-2 00000002]$ ../00000002/eon_peak.lto chair.control.cook
chair.camera chair.surfaces chair.cook.ppm ppm pixels_out.cook
Segmentation fault
[hjl@gnu-mic-2 00000002]$ gdb ../00000002/eon_peak.lto
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Reading symbols from ../00000002/eon_peak.lto...done.
(gdb) r chair.control.cook chair.camera chair.surfaces chair.cook.ppm ppm
pixels_out.cook
Starting program:
/export/project/git/gcc-regression/spec/2000/spec/benchspec/CINT2000/252.eon/run/00000002/eon_peak.lto
chair.control.cook chair.camera chair.surfaces chair.cook.ppm ppm
pixels_out.cook
Program received signal SIGSEGV, Segmentation fault.
0x0042078c in operator*(ggSpectrum const&, ggSpectrum const&) ()
Missing separate debuginfos, use: debuginfo-install glibc-2.18-16.0.fc20.x32
libgcc-4.8.3-7.2.fc20.x86_64 libstdc++-4.8.3-7.2.fc20.x86_64
(gdb) bt
#0 0x0042078c in operator*(ggSpectrum const&, ggSpectrum const&) ()
#1 0x004452d4 in eonImageCalculator::eonImageCalculator() ()
#2 0x0040378a in main ()
(gdb) f 0
#0 0x0042078c in operator*(ggSpectrum const&, ggSpectrum const&) ()
(gdb) disass
Dump of assembler code for function _ZmlRK10ggSpectrumS1_:
0x00420780 <+0>: movups (%esi),%xmm0
0x00420784 <+4>: mov %rdi,%rax
0x00420787 <+7>: movups 0x10(%esi),%xmm1
=> 0x0042078c <+12>: mulps (%edx),%xmm0
0x00420790 <+16>: mulps 0x10(%edx),%xmm1
0x00420795 <+21>: movups %xmm0,(%edi)
0x00420799 <+25>: movups %xmm1,0x10(%edi)
0x0042079e <+30>: retq
End of assembler dump.
(gdb) p $edx
$1 = -13304
(gdb) p/x $edx
$2 = 0xffffcc08
The fix isn't sufficient since adding -fno-ipa-cp fixes eon on x32.
