tree ac01b8f4319f2274b87ff228ccdd91391ba45724
parent a87f1dc5c1b35d5aa37fd23e83e259dae000b1c2
author Ian Rogers <irogers@google.com> 1362416440 -0800
committer Ian Rogers <irogers@google.com> 1362416440 -0800

Fix bug in GBC expansion wrt invoke return types.

An invoke may return a value but that value is then unused. In this situation
mir_to_gbc will see there is no use and generate a call with a void result.
GBC expansion looks at return types to determine the result of a call, leading
to it converting void calls back to ones returning ints and causing assertion
failures in LLVM.

This change bases the return type of the expanded call on the type of the call
instruction it is expanding.

The change contains some other minor bits of LLVM codegen clean-up.

Change-Id: Ia49e7308a641c96892df21662a5a04696a955e00