let emcc directly access bitcode files when possible, to emit proper .d files and avoid unnecessary copies
add dependency file testing
handle --default-object-ext properly, and other emcc fixes
make tests/cases/usenullcall.ll a fastcomp-only test
eliminate X=X which can happen due to elimination
make llvm-lit test emit verbose output
testcase for i64 < 0
typo in .d code generation
Fix https://github.com/kripken/emscripten/issues/2258
play-ttd optiization tricks