Hi,
Steven Bosscher wrote:
this is just a tiny note, that gcc-4.0 does produce miscompiled binaries
on sparc(32)-linux with -mcpu=ultrasparc. Some binaries work, however many such as bash, curl or gzip segfault.
I know this is not a reduced testcase, just a note. I try to invest some time over the weekend to debug this and hopefully produce a reduced testcase. So far this only happens with v9 or above optmiizations. v8 optimized binaries pass checking.
Try the top of the gcc 4.0 branch first. There is a known bug in an optimization pass that may cause wrong code to be produced by GCC 4.0 as released (see http://gcc.gnu.org/PR21173). You may be just seeing yet another incarnation of this problem.
Thanks for the prompt answer. I bootsrapped the 4_0 branch's CVS HEAD (which took quite some hours on the old UltraSPARC) and during the first tests I have not yet encountered the random segfaults anymore.
Yours,
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