35cfc9a3bb
This commit does a bunch of stuff to try to eliminate as many unnecessary mov instructions as possible. First, it introduces the Insn::LoadInto instruction. Previously when we needed a value to go into a specific register (like in Insn::CCall when we're putting values into the argument registers or in Insn::CRet when we're putting a value into the return register) we would first load the value and then mov it into the correct register. This resulted in a lot of duplicated work with short live ranges since they basically immediately we unnecessary. The new instruction accepts a destination and does not interact with the register allocator at all, making it much more efficient. We then use the new instruction when we're loading values into argument registers for AArch64 or X86_64, and when we're returning a value from AArch64. Notably we don't do it when we're returning a value from X86_64 because everything can be accomplished with a single mov anyway. A couple of unnecessary movs were also present because when we called the split_load_opnd function in a lot of split passes we were loading all registers and instruction outputs. We no longer do that. This commit also makes it so that UImm(0) passes through the Insn::Store split without attempting to be loaded, which allows it can take advantage of the zero register. So now instead of mov-ing 0 into a register and then calling store, it just stores XZR. |
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README.md
What is Ruby?
Ruby is an interpreted object-oriented programming language often used for web development. It also offers many scripting features to process plain text and serialized files, or manage system tasks. It is simple, straightforward, and extensible.
Features of Ruby
- Simple Syntax
- Normal Object-oriented Features (e.g. class, method calls)
- Advanced Object-oriented Features (e.g. mix-in, singleton-method)
- Operator Overloading
- Exception Handling
- Iterators and Closures
- Garbage Collection
- Dynamic Loading of Object Files (on some architectures)
- Highly Portable (works on many Unix-like/POSIX compatible platforms as well as Windows, macOS, etc.) cf. https://github.com/ruby/ruby/blob/master/doc/maintainers.rdoc#label-Platform+Maintainers
How to get Ruby with Git
For a complete list of ways to install Ruby, including using third-party tools like rvm, see:
https://www.ruby-lang.org/en/downloads/
The mirror of the Ruby source tree can be checked out with the following command:
$ git clone https://github.com/ruby/ruby.git
There are some other branches under development. Try the following command to see the list of branches:
$ git ls-remote https://github.com/ruby/ruby.git
You may also want to use https://git.ruby-lang.org/ruby.git (actual master of Ruby source) if you are a committer.
Ruby home page
Documentation
Mailing list
There is a mailing list to discuss Ruby. To subscribe to this list, please send the following phrase:
subscribe
in the mail body (not subject) to the address ruby-talk-request@ruby-lang.org.
Copying
See the file COPYING.
Feedback
Questions about the Ruby language can be asked on the Ruby-Talk mailing list or on websites like https://stackoverflow.com.
Bugs should be reported at https://bugs.ruby-lang.org. Read "Reporting Issues" for more information.
Contributing
See "Contributing to Ruby", which includes setup and build instructions.
The Author
Ruby was originally designed and developed by Yukihiro Matsumoto (Matz) in 1995.