On 2013.12.31 at 11:12 -0800, Andrew Trick wrote: > > On Dec 30, 2013, at 1:47 PM, Markus Trippelsdorf <[email protected]> > wrote: > > > On 2013.12.30 at 18:47 +0000, Pádraig Brady wrote: > >> On 12/30/2013 12:32 PM, Markus Trippelsdorf wrote: > >>> coreutils-8.22 build with clang-3.4 doesn't copy permissions correctly: > >>> > >>> markus@x4 tmp % touch test1 > >>> markus@x4 tmp % chmod 600 test1 > >>> markus@x4 tmp % ls -al test1 > >>> -rw------- 1 markus markus 0 Dec 30 13:25 test1 > >>> markus@x4 tmp % /var/tmp/coreutils-8.22/src/cp test1 test2 > >>> markus@x4 tmp % ls -al test2 > >>> ---------- 1 markus markus 0 Dec 30 13:25 test2 > >>> markus@x4 tmp % > >> > >> Ouch. > >> > >> Note as part of the 8.22 release process > >> I did verify that `make check` passed with > >> clang-3.3-3.fc20.x86_64 > >> > >> I've again verified that clang-3.3 passes your test above. > >> > >> Can you pinpoint the erroneous code? > >> It does seem like a clang regression TBH. > > > > Started with LLVM r192750 (Enable MI Sched for x86). > > I've opened a LLVM bug here: > > http://llvm.org/bugs/show_bug.cgi?id=18346 > > > > (I will try to come up with a testcase after the holidays) > > To determine whether a bug exists in MI scheduler pass (or downstream) you > can do this: > -mllvm -enable-misched=false. > > Duncan committed a post-3.4 fix, r197503, for a varargs bug exposed by > changes to the SD scheduling policy.
Yes, r197503 fixes the issue. Would be nice to get the fix applied before 3.4 gets released... -- Markus
