On Dec 31, 2013, at 11:39 AM, Markus Trippelsdorf <[email protected]> wrote:
> 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... Yep, it would be nice. But the fix was considered too late 2 weeks ago, so it’s even less likely now. I don’t think there’s any way to rerun validation at this point. I’m copying Bill who is the authority. -Andy
