Excuse me, I have reverted this in r219595. It broke i686 builders. - http://bb.pgr.jp/builders/clang-3stage-i686-linux/builds/797 - http://bb.pgr.jp/builders/clang-3stage-i686-cygwin/builds/667 I'll send a reproducible testcase.ll later. REPOSITORY rL LLVM http://reviews.llvm.org/D5701