bisecting mesa comes to this

0e0c21e00ee80bcff67e37ec86b97d6c25db066a is the first bad commit
commit 0e0c21e00ee80bcff67e37ec86b97d6c25db066a
Author: Michal Sciubidlo <michal.sciubidlo@gmail.com>
Date:   Wed Sep 12 08:57:01 2012 +0200

    radeon/llvm: Emit ISA for ALU instructions in the R600 code emitter

    Signed-off-by: Tom Stellard <thomas.stellard@amd.com>

:040000 040000 de615a99537b02f3e978f285393559da27d8c1da
2e75e2c1ba7912acfdbbb38c65c3c21831b258da M    src


configure is in comment 7