regression in igb/clang?

Hi,

I' updated a system with -current as of r287323 (end August) to r290633
(yesterday).

Result: no network connection (not even ping) on igb.
Ping internally (local addresses) works, anything outgoing/incoming
doesn't.

I disabled HW support (tso4, lro, rxcsum, txcsum): doesn't help.

Did I miss some known defect/workaround?

Anything I should test/provide besides what is below?

The igb device is a:
---snip---
igb0_at_pci0:1:0:0: class=0x020000 card=0x34e28086 chip=0x10a78086 rev=0x02 hdr=0x00
---snip---

My src.conf:
---snip---
WITH_IDEA=yes
WITHOUT_PROFILE=yes
CFLAGS+=-DFTP_COMBINE_CWDS
MALLOC_PRODUCTION=yes
LOADER_FIREWIRE_SUPPORT=yes
#WITH_FAST_DEPEND=yes
---snip---

My buildworld related config in make.conf:
---snip---
CFLAGS+= -O2 -pipe
COPTFLAGS= -O2 -pipe
#CPUTYPE?=core2
#WITH_CCACHE_BUILD=yes
#.if (!empty(.CURDIR:M/usr/src*)
|| !empty(.CURDIR:M/usr/obj*)|| !empty(.CURDIR:M/space/system/usr_obj*))
#.if !defined(NOCCACHE) && exists(/usr/local/libexec/ccache/world/cc)
#CC:=${CC:C,^cc,/usr/local/libexec/ccache/world/cc,1}
#CXX:=${CXX:C,^c\+\+,/usr/local/libexec/ccache/world/c++,1} #.endif
#.endif
---snip---

The commented out parts were active initially, but then I commented
them out, cleaned out /usr/obj (rm -r) and rebuild/reinstall to make
sure it's not due to them (CPUTYPE commented out due to the fact that
there's a new compiler, and I use zsh and there was a commit talking
about zsh and CPUTYPE workaround).

Bye,
Alexander.

-- 
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http://www.FreeBSD.org    netchild_at_FreeBSD.org  : PGP 0xC773696B3BAC17DC