Note that this is a band-aid put over a band-aid.  This just undisables
tail duplication in on very specific case that it seems to work in.

llvm-svn: 11989

hot 164.gzip loop.

llvm-svn: 11702

llvm-svn: 11052

llvm-svn: 10725

llvm-svn: 9903

Header files will be on the way.

llvm-svn: 9298

llvm-svn: 8276

llvm-svn: 8078

llvm-svn: 7492

llvm-svn: 7243

llvm-svn: 6881

llvm-svn: 6856

llvm-svn: 6852

llvm-svn: 6846