3bdbf74d47
This adds support for dropping cleanups for temporary values when they are moved somewhere else. It then adds wraps most copy operations (return, put in data structure, box, etc) in a way that will fall back to a move when it is safe. This saves a lot of taking/dropping, shaving over a megabyte off the stage2/rustc binary size. In some cases, most notably function returns, we could detect that the returned value is a local variable, and can thus be safely moved even though it is not a temporary. This will require putting some more information in lvals. I did not yet handle function arguments, since the logic for passing them looked too convoluted to touch. I'll probably try that in the near future, since it's bound to be a big win.
This is preliminary version of the Rust compiler(s).
Source layout:
comp/ The self-hosted compiler
lib/ The standard library
rustllvm/ LLVM support code
rt/ The runtime system
rt/rust_*.cpp - The majority of the runtime services
rt/isaac - The PRNG used for pseudo-random choices in the runtime
rt/bigint - The bigint library used for the 'big' type
rt/uthash - Small hashtable-and-list library for C, used in runtime
rt/{sync,util} - Small utility classes for the runtime.
test/ Testsuite
test/compile-fail - Tests that should fail to compile
test/run-fail - Tests that should compile, run and fail
test/run-pass - Tests that should compile, run and succeed
test/bench - Benchmarks and miscellanea
Please be gentle, it's a work in progress.