All, Just a heads up that the bytecode format changed again last night. If you have bc files, they need to be refreshed. If you're running a nightly tester, please refresh your llvm-gcc (mirror should be updated now, or soon). The change resulted from PR1146 which redesigns the parameter attribute feature. With the redesign it became possible to reduce the size of a function type definition by avoiding writing the parameter attributes if there aren't any (many cases). Sorry if this caused any inconvenience. Reid.